Workshop Electrical Manual

Electrics (I) 1-1 Table of contents

Electrics (I)
1.1 Warning and caution .......................... 1-7 1.2.4.29 DTC: B1B4313, B1B4011 ............. 1-90

1.1.1 Warning and caution ............................... 1--7 1.2.5 Diagnostic information and procedure .... 1-94

1.1.1.1 Warning and caution ........................ 1--7 1.2.5.1 Diagnostic instructions .................... 1-94

1.2 Intelligent multimedia system ........... 1-9 1.2.5.2 Visual inspection ............................. 1-94

1.2.1 System description................................... 1-9 1.2.5.3 ECU terminals................................. 1-94

1.2.1.1 System description ........................... 1-9 1.2.5.4 Data list ........................................... 1-99

1.2.2 Location of components ......................... 1-10 1.2.5.5 Diagnostic trouble codes (DTCs)
list ............................................................. 1-100
1.2.2.1 Location of components ................. 1-10
1.2.5.6 DTC: U007480, U007388 ............. 1-106
1.2.2.2 Location of components ................. 1-11
1.2.5.7 DTC: U014087 .............................. 1-108
1.2.3 Electrical schematic diagram ................ 1-12
1.2.5.8 DTC: U016487, U042481 ............. 1-111
1.2.3.1 Electrical schematic diagram .......... 1-12
1.2.5.9 DTC: U015987 .............................. 1-113
1.2.3.2 Electrical schematic diagram .......... 1-13
1.2.5.10 DTC: U014687, U044781 ........... 1-116
1.2.3.3 Electrical schematic diagram .......... 1-14
1.2.5.11 DTC: U019887 ............................ 1-118
1.2.4 Diagnostic information and procedure (AVNT)
........................................................................ 1-15 1.2.5.12 DTC: B1B0016, B1B0017 ........... 1-122

1.2.4.1 Diagnostic instructions .................... 1-15 1.2.5.13 DTC: B1B4012, B1B4313 ........... 1-125

1.2.4.2 Visual inspection............................. 1-15 1.2.5.14 DTC: B1B4112, B1B4113 ........... 1-128

1.2.4.3 ECU terminals ................................ 1-15 1.2.5.15 DTC: B1BE411, B1BE779 .......... 1-131

1.2.4.4 Data list........................................... 1-18 1.2.5.16 DTC: B1BE679 ........................... 1-134

1.2.4.5 Diagnostic trouble codes (DTCs) list1-18 1.2.5.17 DTC: B1BE579 ........................... 1-138

1.2.4.6 DTC: B1F0811, B1F0814 ............... 1-22 1.2.5.18 DTC: B1B31F0, B1B31F1........... 1-143

1.2.4.7 DTC: B1F0113, B1F0111 ............... 1-27 1.2.5.19 DTC: B1BE012, B1BE011 .......... 1-146

1.2.4.8 DTC: B1F0213, B1F0212 ............... 1-30 1.2.5.20 DTC: B1BE112, B1BE111 .......... 1-149

1.2.4.9 DTC: B1F0313, B1F0312 ............... 1-33 1.2.5.21 DTC: B1BE212, B1BE211 .......... 1-152

1.2.4.10 DTC: B1F3000, B1F3100 ............. 1-36 1.2.5.22 DTC: B1BE312, B1BE311 .......... 1-155

1.2.4.11 DTC: B1F6300, B1F8404 ............. 1-39 1.2.5.23 DTC: B182011, B182012 ............ 1-158

1.2.4.12 DTC: B1F3111, B1F3011 ............. 1-40 1.2.5.24 DTC: B1BF098 ........................... 1-161

1.2.4.13 DTC: B27101C, B271002 ............. 1-43 1.2.5.25 DTC: B1B4396, B1B4395 ........... 1-164

1.2.4.14 DTC: B27111C, B271102 ............. 1-46 1.2.5.26 DTC: B1B4394, B1B4393 ........... 1-167

1.2.4.15 DTC: B27121C, B271202 ............. 1-49 1.2.5.27 DTC: B186044, B18DE96 ........... 1-170

1.2.4.16 DTC: B27131C, B271302 ............. 1-52 1.2.5.28 DTC: B1BE412, B1BE411 .......... 1-172

1.2.4.17 DTC: U007388, U007480 ............. 1-55 1.2.5.29 DTC: B1BE712, B1BE711 .......... 1-175

1.2.4.18 DTC: U012987, U048186 ............. 1-57 1.2.5.30 DTC: B1BF179 ........................... 1-178

1.2.4.19 DTC: U012987, U048186 ............. 1-61 1.2.5.31 DTC: B1BF279 ........................... 1-181

1.2.4.20 DTC: U014087, U042286 ............. 1-64 1.2.5.32 DTC: B1BF279 ........................... 1-184

1.2.4.21 DTC: U012687, U042886 ............. 1-66 1.2.5.33 DTC: B1BF379 ........................... 1-187

1.2.4.22 DTC: U010187, U040286 ............. 1-70 1.2.5.34 DTC: B1BF479 ........................... 1-189

1.2.4.23 DTC: U015987, U045A81 ............. 1-73 1.2.6 Diagnostic information and procedure
(AV unit) ........................................................ 1-193
1.2.4.24 DTC: U015187, U045281 ............. 1-76
1.2.6.1 Diagnostic instructions .................. 1-193
1.2.4.25 DTC: U016487, U042481 ............. 1-79
1.2.6.2 Visual inspection ........................... 1-193
1.2.4.26 DTC: U014687, U044781 ............. 1-81
1.2.6.3 ECU terminals............................... 1-193
1.2.4.27 DTC: U015587.............................. 1-84
1.2.6.4 Diagnostic trouble codes (DTCs) list1-197
1.2.4.28 DTC: B1B0016, B1B0017 ............. 1-86
Table of contents 1-2 Electrics (I)
1.2.6.5 DTC: B27101C, B271002 ............. 1-199 1.3.4 Removal and installation ...................... 1-264
1.2.6.6 DTC: B27111C, B271102 ............. 1-202 1.3.4.1 Removing and installing map pocket
ambient light ............................................. 1-264
1.2.6.7 DTC: B27121C, B271202 ............. 1-205
1.3.4.2 Removing and installing console mobile
1.2.6.8 DTC: B27131C, B271302 ............. 1-208 phone storage box ambient light .............. 1-265
1.2.6.9 DTC: U007388, U007480 ............. 1-211
1.4 External lighting system ................1-266
1.2.6.10 DTC: U012987, U048186 ........... 1-213
1.4.1 Specifications ...................................... 1--266
1.2.6.11 DTC: U014087, U042286 ........... 1-217
1.4.1.1 Fastener specifications ................. 1-266
1.2.6.12 DTC: U012687, U042886 ........... 1-219
1.4.2 System description ............................... 1-267
1.2.6.13 DTC: B278187, B273011............ 1-223
1.4.2.1 System description ....................... 1-267
1.2.6.14 DTC: U010187, U040286 ........... 1-224
1.4.2.2 System control logic ...................... 1-267
1.2.6.15 DTC: U015987, U045A81 ........... 1-228
1.4.3 Location of components ....................... 1-270
1.2.6.16 DTC: U015187, U045281 ........... 1-231
1.4.3.1 Location of components 1 ............. 1-270
1.2.6.17 DTC: U016487, U042481 ........... 1-234
1.4.3.2 Location of components 2 ............. 1-271
1.2.6.18 DTC: U014687, U044781 ........... 1-236
1.4.4 Electrical schematic diagram................ 1-272
1.2.6.19 DTC: B1B0016, B1B0017 ........... 1-239
1.4.4.1 Electrical schematic diagram ........ 1-272
1.2.6.20 DTC: U015587............................ 1-242
1.4.5 Common fault diagnosis ....................... 1-273
1.2.6.21 DTC: B1B4313, B1B4011 ........... 1-244
1.4.5.1 Diagnostic instructions .................. 1-273
1.2.7 Removal and installation ...................... 1-248
1.4.5.2 Visual inspection ........................... 1-273
1.2.7.1 Removing and installing AVNT
unit........................................................... 1-248 1.4.5.3 Low beam failure to work .............. 1-273

1.2.7.2 Removing and installing touch 1.4.5.4 High beam failure to work ............. 1-278
screen....................................................... 1-249 1.4.5.5 Daytime running lamp failure to
1.2.7.3 Removing and installing front door woofer work .......................................................... 1-282
assembly .................................................. 1-251 1.4.5.6 Left turn signal lamp failure to work1-285
1.2.7.4 Removing and installing rear door woofer 1.4.5.7 Right turn signal lamp failure to
assembly .................................................. 1-252 work .......................................................... 1-293
1.2.7.5 Removing and installing squawker 1.4.5.8 Left position lamp failure to work .. 1-301
assembly (headrest) ................................ 1-253
1.4.5.9 Right position lamp failure to work 1-306
1.2.7.6 Removing and installing radio antenna
amplifier .................................................... 1-255 1.4.5.10 Rear fog lamp failure to work ...... 1-311

1.2.7.7 Removing and installing front door tweeter 1.4.5.11 Brake lamp failure to work .......... 1-315
assembly .................................................. 1-256 1.4.5.12 High-mounted stop lamp failure to work
1.2.7.8 Removing and installing AR camera1-256 .................................................................. 1-320

1.2.7.9 Removing and installing rear door tweeter 1.4.5.13 Reverse lamp failure to work ...... 1-325
assembly .................................................. 1-257 1.4.5.14 License plate lamp failure to work1-327
1.2.7.10 Removing and installing squawker 1.4.6Diagnostic information and procedure (left front
assembly (instrument panel side) ............ 1-258 combination lamp) ......................................... 1-332
1.2.7.11 Removing and installing subwoofer 1.4.6.1 Diagnostic instructions .................. 1-332
assembly .................................................. 1-259
1.4.6.2 Visual inspection ........................... 1-332
1.2.7.12 Removing and installing power amplifier
assembly .................................................. 1-260 1.4.6.3 ECU terminals............................... 1-332

1.3 Intelligent ambient light system ... 1-261 1.4.6.4 Data list ......................................... 1-333

1.3.1 System description............................... 1-261 1.4.6.5 Diagnostic trouble codes (DTCs)

list ............................................................. 1-333
1.3.1.1 System description ....................... 1-261
1.4.6.6 DTC: B2E0016, B2E0017 ............. 1-333
1.3.2 Location of components ....................... 1-262
1.4.6.7 DTC: U007388 .............................. 1-336
1.3.2.1 Location of components ............... 1-262
1.4.6.8 DTC: B316004, U16C387 ............. 1-338
1.3.3 Electrical schematic diagram .............. 1-263
1.4.6.9 DTC: U014687 .............................. 1-340
1.3.3.1 Electrical schematic diagram ........ 1-263
1.4.6.10 DTC: B31A096, B31A196 ........... 1-343

GAC Motor 2023

Electrics (I) 1-3 Table of contents
1.4.6.11 DTC: B31A296 ........................... 1-346 1.4.10.2 Adjusting front combination lamp 1-411
1.4.6.12 DTC: B31A396 ........................... 1-349 1.4.10.3 Removing and installing reverse
lamp .......................................................... 1-412
1.4.7Diagnostic information and procedure (right
front combination lamp) ................................ 1-353 1.4.10.4 Removing and installing rear fog
lamp .......................................................... 1-412
1.4.7.1 Diagnostic instructions .................. 1-353
1.4.10.5 Removing and installing instrument panel
1.4.7.2 Visual inspection........................... 1-353 switch block - right .................................... 1-413
1.4.7.3 ECU terminals .............................. 1-353 1.4.10.6 Removing and installing rear combination
1.4.7.4 Data list......................................... 1-354 lamp A assembly ...................................... 1-414
1.4.7.5 Diagnostic trouble codes (DTCs) 1.4.10.7 Removing and installing exterior rearview
list ............................................................. 1-354 mirror turn lamp ....................................... 1-416
1.4.7.6 DTC: B310516, B310517.............. 1-354 1.4.10.8 Removing and installing lamplight
combination switch ................................... 1-418
1.4.7.7 DTC: U007388.............................. 1-357
1.4.10.9 Removing and installing combination
1.4.7.8 DTC: B316504, U16C387 ............. 1-359 switch and clock spring assembly ............ 1-419
1.4.7.9 DTC: U014687.............................. 1-361 1.4.10.10 Removing and installing clock spring
1.4.7.10 DTC: B31A596, B31A696 ........... 1-364 assembly .................................................. 1-420

1.4.7.11 DTC: B31A796 ........................... 1-367 1.4.10.11 Adjusting clock spring ............... 1-421

1.4.7.12 DTC: B31A896 ........................... 1-370 1.4.10.12 Removing and installing instrument
panel switch block..................................... 1-422
1.4.8 Diagnostic information and procedure (left rear
combination lamp) ........................................ 1-374 1.4.10.13 Removing and installing left instrument
panel switch block assembly..................... 1-423
1.4.8.1 Diagnostic instructions .................. 1-374
1.4.10.14 Removing and installing hazard warning
1.4.8.2 Visual inspection........................... 1-374 lamp switch .............................................. 1-424
1.4.8.3 ECU terminals .............................. 1-374 1.4.10.15 Removing and installing retro-reflector
.................................................................. 1-425
1.4.8.4 Data list......................................... 1-375
1.4.10.16 Removing and installing license plate
1.4.8.5 Diagnostic trouble codes (DTCs) list1-375
lamp .......................................................... 1-426
1.4.8.6 DTC: B310816, B310817.............. 1-375
1.4.10.17 Removing and installing instrument
1.4.8.7 DTC: U007388.............................. 1-378 panel switch block - left ............................ 1-426
1.4.8.8 DTC: B316804 .............................. 1-380 1.4.10.18 Removing and installing front
combination lamp control unit ................... 1-427
1.4.8.9 DTC: U014687.............................. 1-382
1.5 Internal lighting system .................1-428
1.4.8.10 DTC: B31A996 ........................... 1-385
1.5.1 System description ............................... 1-428
1.4.8.11 DTC: B31AA96 ........................... 1-388
1.5.1.1 System composition ...................... 1-428
1.4.9 Diagnostic information and procedure (right
rear combination lamp) ................................. 1-392 1.5.1.2 Function description of internal lighting
system ...................................................... 1-428
1.4.9.1 Diagnostic instructions .................. 1-392
1.5.2 Location of components ....................... 1-429
1.4.9.2 Visual inspection........................... 1-392
1.5.2.1 Location of components ................ 1-429
1.4.9.3 ECU terminals .............................. 1-392
1.5.3 Electrical schematic diagram................ 1-430
1.4.9.4 Data list......................................... 1-393
1.5.3.1 Electrical schematic diagram ........ 1-430
1.4.9.5 Diagnostic trouble codes (DTCs)
list ............................................................. 1-393 1.5.4 Diagnostic information and procedure .. 1-431
1.4.9.6 DTC: B310A16, B310A17 ............. 1-393 1.5.4.1 Diagnostic instructions .................. 1-431
1.4.9.7 DTC: U007388.............................. 1-396 1.5.4.2 Visual inspection ........................... 1-431
1.4.9.8 DTC: B316A04 ............................. 1-398 1.5.4.3 Front reading lamp (in ON position) failure
to work ...................................................... 1-431
1.4.9.9 DTC: U014687.............................. 1-400
1.5.4.4 Front reading lamp (in DOOR position)
1.4.9.10 DTC: B31AB96 ........................... 1-403
failure to work ........................................... 1-433
1.4.9.11 DTC: B31AC96 ........................... 1-406
1.5.4.5 2nd-row dome lamp (in ON position)
1.4.10 Removal and installation .................... 1-410 failure to work ........................................... 1-437
1.4.10.1 Removing and installing front 1.5.4.6 2nd-row dome lamp (in DOOR position)
combination lamp ..................................... 1-410 failure to work ........................................... 1-441
Table of contents 1-4 Electrics (I)
1.5.4.7 Trunk lamp failure to work ............ 1-446 1.7.3 Exploded view ...................................... 1-485
1.5.5 Removal and installation ...................... 1-449 1.7.3.1 Exploded view 1 ............................ 1-485
1.5.5.1 Removing and installing front dome lamp 1.7.3.2 Exploded view 2 ............................ 1-486
assembly .................................................. 1-449
1.7.4 Electrical schematic diagram................ 1-487
1.5.5.2 Removing and installing rear dome lamp
(panoramic canopy) .................................. 1-451 1.7.4.1 Electrical schematic diagram ........ 1-487

1.5.5.3 Removing and installing trunk lamp1-452 1.7.5 Diagnostic information and procedure .. 1-488

1.5.5.4 Removing and installing rear dome 1.7.5.1 Diagnostic instructions .................. 1-488
lamp.......................................................... 1-453 1.7.5.2 Visual inspection ........................... 1-488
1.6 Rearview mirror .............................. 1-454 1.7.5.3 Wiper failure to work in HI ............. 1-488
1.6.1 Specifications ...................................... 1--454 1.7.5.4 Wiper failure to work in LO............ 1-491
1.6.1.1 Fastener specifications ................. 1-454 1.7.5.5 Wiper failure to work in INT........... 1-495
1.6.2 System description............................... 1-455 1.7.5.6 Front washer failure to work .......... 1-498
1.6.2.1 System description ....................... 1-455 1.7.6 List of special tools ............................... 1-504
1.6.3 Exploded view ...................................... 1-457 1.7.6.1 List of special tools ....................... 1-504
1.6.3.1 Exploded view .............................. 1-457 1.7.7 Removal and installation ...................... 1-505
1.6.4 Electrical schematic diagram ............... 1-458 1.7.7.1 Removing and installing filling port 1-505
1.6.4.1 Electrical schematic diagram ........ 1-458 1.7.7.2 Removing and installing washer fluid
reservoir assembly.................................... 1-506
1.6.5 Diagnostic information and procedure . 1-459
1.7.7.3 Removing and installing front windshield
1.6.5.1 Diagnostic instructions .................. 1-459 washer motor ............................................ 1-507
1.6.5.2 Visual inspection........................... 1-459 1.7.7.4 Removing and installing front windshield
1.6.5.3 Electric rearview mirror failure to be washer nozzle ........................................... 1-508
adjusted .................................................... 1-459 1.7.7.5Removing and installing front wiper blade
1.6.5.4 Electric rearview mirror failure to be .................................................................. 1-509
folded........................................................ 1-462 1.7.7.6 Removing and installing wiper arm and
1.6.5.5 Electric rearview mirror failure to be wiper blade assembly ............................... 1-510
unfolded ................................................... 1-466 1.7.7.7 Removing and installing front wiper motor
1.6.5.6 Electric rearview mirror failure to be and linkage assembly .............................. 1-512
heated ...................................................... 1-470 1.7.7.8 Removing and installing front wiper motor
1.6.6 Removal and installation ...................... 1-475 .................................................................. 1-513

1.6.6.1 Removing and installing mirror lens 1.7.7.9 Removing and installing front wiper
assembly .................................................. 1-475 linkage ...................................................... 1-514

1.6.6.2 Removing and installing adjustment motor 1.7.7.10 Removing and installing wiper
assembly .................................................. 1-476 combination switch ................................... 1-515

1.6.6.3 Removing and installing exterior rearview 1.7.7.11 Removing and installing rain light sensor
mirror assembly ........................................ 1-478 (RLS) ........................................................ 1-516

1.6.6.4 Removing and installing interior rearview 1.7.7.12 Checking and adjusting installation
mirror assembly (manual anti-dazzling) .... 1-479 position of wiper blade .............................. 1-517

1.6.6.5 Removing and installing interior rearview 1.7.7.13 Adjusting front windshield washer nozzle
mirror assembly (auto anti-dazzling)......... 1-480 .................................................................. 1-518

1.6.6.6 Removing and installing left and right trim 1.8 Driver information system .............1-519
covers of interior rearview mirror .............. 1-481
1.8.1 System description ............................... 1-519
1.6.6.7 Removing and installing exterior rearview
mirror adjusting switch .............................. 1-482 1.8.1.1 System description ....................... 1-519
1.8.1.2 Instrument cluster indicator lamp .. 1-520
1.7 Wiper/washer system .................... 1-483
1.8.2 Location of components ....................... 1-522
1.7.1 Specifications ...................................... 1--483
1.8.2.1 Location of components ................ 1-522
1.7.1.1 Fastener specifications ................. 1-483
1.8.3 Electrical schematic diagram................ 1-523
1.7.2 System description............................... 1-484
1.8.3.1 Electrical schematic diagram ........ 1-523
1.7.2.1 System description ....................... 1-484
1.8.4 Diagnostic information and procedure .. 1-524
GAC Motor 2023
Electrics (I) 1-5 Table of contents
1.8.4.1 Diagnostic instructions .................. 1-524 1.9.6 Removal and installation ...................... 1-593
1.8.4.2 Visual inspection........................... 1-524 1.9.6.1 Removing and installing sunshade
motor ........................................................ 1-593
1.8.4.3 ECU terminals .............................. 1-524
1.9.6.2 Removing and installing sunshade fabric
1.8.4.4 Data list......................................... 1-525 assembly ................................................. 1-594
1.8.4.5 Diagnostic trouble codes (DTCs) 1.9.6.3 Removing and installing sunshade
list ............................................................. 1-525 assembly ................................................. 1-595
1.8.4.6 DTC: B180017, B180016.............. 1-528
1.10 Central locking .............................1-596
1.8.4.7 DTC: B182011, B182012.............. 1-531
1.10.1 Specifications .................................... 1--596
1.8.4.8 DTC: U007388, B186000 ............. 1-534
1.10.1.1 Fastener specifications ............... 1-596
1.8.4.9 DTC: U042481, U010187 ............. 1-536
1.10.2 System description ............................. 1-597
1.8.4.10 DTC: U014087............................ 1-538
1.10.2.1 System description ..................... 1-597
1.8.4.11 DTC: U015987............................ 1-541
1.10.3 Location of components ..................... 1-598
1.8.4.12 DTC: U132087............................ 1-544
1.10.3.1 Location of components .............. 1-598
1.8.4.13 DTC: U018487............................ 1-546
1.10.4 Electrical schematic diagram.............. 1-599
1.8.4.14 DTC: U014687, U044781 ........... 1-549
1.10.4.1 Electrical schematic diagram ...... 1-599
1.8.4.15 DTC: U020887............................ 1-551
1.10.5 Diagnostic information and procedure 1-600
1.8.4.16 DTC: U019887............................ 1-554
1.10.5.1 Diagnostic instructions ................ 1-600
1.8.4.17 DTC: B186044, B18A096 ........... 1-557
1.10.5.2 Visual inspection ......................... 1-600
1.8.4.18 DTC: B18D096, B18D196 .......... 1-559
1.10.5.3 Smart key function failure ........... 1-600
1.8.4.19 DTC: U012787............................ 1-561
1.10.5.4 Central locking switch function
1.8.4.20 DTC: U025987............................ 1-564 failure ........................................................ 1-600
1.8.4.21 DTC: U025887............................ 1-566 1.10.5.5 Central locking system failure to
lock/unlock doors ...................................... 1-602
1.8.4.22 DTC: U11E087 ........................... 1-569
1.10.5.6 Trunk lid lock failure to be
1.8.5 Removal and installation ...................... 1-574 unlocked ................................................... 1-605
1.8.5.1 Removing and installing instrument cluster 1.10.5.7 Left front door lock failure to
display ..................................................... 1-574 work .......................................................... 1-609
1.9 Electric sunshade........................... 1-576 1.10.5.8 Right front door lock failure to
1.9.1 Specifications ...................................... 1--576 work .......................................................... 1-613

1.9.1.1 Fastener specifications ................. 1-576 1.10.5.9 Left rear door lock failure to work 1-616

1.9.2 System description............................... 1-577 1.10.5.10 Right rear door lock failure to
work .......................................................... 1-620
1.9.2.1 System description ....................... 1-577
1.10.6 Removal and installation .................... 1-625
1.9.2.2 Initialization of electric sunshade .. 1-579
1.10.6.1 Removing and installing front door lock
1.9.3 Exploded view ...................................... 1-581 assembly .................................................. 1-625
1.9.3.1 Exploded view .............................. 1-581 1.10.6.2 Removing and installing rear door lock
assembly .................................................. 1-627
1.9.4 Electrical schematic diagram ............... 1-582
1.10.6.3 Removing and installing door lock catch
1.9.4.1 Electrical schematic diagram ........ 1-582
.................................................................. 1-628
1.9.4.2 Electrical schematic diagram ........ 1-583
1.9.5 Diagnostic information and procedure . 1-584
1.9.5.1 Diagnostic instructions .................. 1-584
1.9.5.2 Visual inspection........................... 1-584
1.9.5.3 Panorama sunroof sunshade failure to
work .......................................................... 1-584
1.9.5.4 Panorama sunroof sunshade failure to be
opened ..................................................... 1-587
1.9.5.5 Panorama sunroof sunshade failure to be
closed ....................................................... 1-590
Table of contents 1-6 Electrics (I)

GAC Motor 2023

Electrics (I) 1-7 Warning and caution
1.1 Warning and caution
1.1.1 Warning and caution
1.1.1.1 Warning and caution
1. Warning about disconnecting negative battery cable
Warning!
Before any electrical components are repaired, the ENGINE START/STOP button shall be in "OFF" position, and all
electrical loads shall be in ―OFF‖ status, unless otherwise specified in the operating procedures. If tools or equipment
tends to come into contact with the exposed cables or live electrical terminals, be sure to disconnect the negative battery
cable. Failure to follow these safety instructions may cause personal injury or damage to the vehicle.
2. Warning about road test
Warning!
Road test a vehicle provided that safety can be ensured, and obey all traffic rules during the test. Do not attempt any
maneuvers that could jeopardize vehicle control. Failure to adhere to these safety instructions could lead to serious
personal injuries and vehicle damage.
3. Warning about auto up/down function of window
Warning!
During operation of the power window switch on the driver's door, the window express up/down function enables the
window to move too fast to stop, which may cause personal injuries.
4. Considerations for disconnecting battery cable
Caution
Whenever connecting or disconnecting the battery cable, battery charger or jumper cables, be sure to set the ENGINE
START/STOP button to "OFF" position. Otherwise, the control module or other electrical components may be damaged.
5. Warning about SRS
Warning!
This vehicle is equipped with a supplemental restraint system (SRS). If SRS is not operated according to the correct
procedure, the following conditions will occur:
• The SRS is deployed accidentally.
• The SRS does not function when it is required.
Warning!
To avoid those conditions, be sure to follow the guidelines below:
• Refer to SRS component views in order to determine if you are performing repair on or near the SRS components or
the SRS wiring.
• If you are performing repair on or near the SRS components or the SRS wiring, disable the SRS. Refer to ―Warning
about disconnecting negative battery cable‖ in ―Warning and caution‖.
6. Warning about high-temperature deployed SRS ECU
Warning!
After deployment, the temperature of the metal surfaces of the SRS components may be very high. To avoid a fire or
personal injuries:
• Allow sufficient time for cooling before touching any metal surface of the SRS components.
• Do not place the deployed SRS component near any flammable object.
7. Warning about SRS clock spring
Warning!
Incorrect installation of the clock spring assembly will damage the spiral coil inside the clock spring, and lead to the
failure of the airbag module to work normally due to a coil fault, thereby causing personal injuries.
Warning and caution 1-8 Electrics (I)
8. Warning about SRS disposal
Warning!
In order to prevent personal injuries due to unexpected deployment of airbag, do not dispose an undeployed airbag
module as normal shop waste. Undeployed SRS contains substances that could cause severe illness or personal injuries
if the sealed containers are damaged during scrapping. Safely dispose the undeployed airbag module according to the
deployment procedure.
9. Warning about SRS inflation module handling and storage
Warning!
While transporting an undeployed airbag module:
• Do not handle airbag modules by holding their wires or connectors.
• Do not point the airbag opening at yourself or others.
Warning!
When storing an undeployed airbag module, make sure that the airbag opening is not facing the surface where the
airbag module is placed. The airbag opening may not face downwards. Never place any objects on the airbag module
and keep enough free space for the airbag to deploy accidentally; otherwise the airbag may cause personal injury. Never
immerse an undeployed airbag module in water or allow it to come into contact with other liquids. Never place an
undeployed airbag module close to fire or in a high-temperature area so as to prevent personal injuries due to
unexpected deployment of the airbag.
10. Warning about SRS impact sensors disposal
Warning!
Never hit or shake an SRS impact sensor. Make sure the impact sensor is firmly fixed before powering on it. Failing to
observe proper installation procedures may cause false airbag deployment or deployment failure, thereby leading to
personal injuries.

GAC Motor 2023

Electrics (I) 1-9 Intelligent multimedia system
1.2 Intelligent multimedia system
1.2.1 System description
1.2.1.1 System description
Two kinds of AV systems are available, namely AV system and AVNT system, depending on the configuration.
The AV system is mainly composed of AVNT/AV unit, touch screen, speaker, antenna, etc., which has powerful audio-
visual entertainment and driving assistance functions such as radio, navigation, USB flash drive, Bluetooth (compatible
with Bluetooth phone), reversing image, HVAC control display, vehicle body control via mobile APP, ADiGO assist,
network entertainment service and other functions.
Intelligent multimedia system 1-10 Electrics (I)
1.2.2 Location of components
1.2.2.1 Location of components

Rear door tweeter assembly

Rear door woofer assembly

Front door woofer assembly

Front door tweeter assembly

Squawker assembly
Squawker assembly

Rear door tweeter assembly

Front door tweeter assembly Rear door woofer assembly

Front door woofer assembly

GAC Motor 2023

Electrics (I) 1-11 Intelligent multimedia system
1.2.2.2 Location of components

Squawker assembly
Touch screen

AVNT

Power amplifier assembly

Subwoofer assembly
Intelligent multimedia system 1-12 Electrics (I)
1.2.3 Electrical schematic diagram
1.2.3.1 Electrical schematic diagram
Clock spring

To ACC power

Steering wheel
supply

switch
GWM
To IG1 power
supply

To BAT power
supply

Fuel level sensor

Instrument
cluster display Fuel pump

AV display
AR camera

FAPA ECU Brake fluid level sensor

Front dome lamp HUD

assembly (Bluetooth
microphone module)

T-BOX ECU
AMP
AV control unit (ACU)

Radio signal AM/FM antenna

Left front door woofer

USB port 1
Left front door tweeter

USB port 2
Right front door woofer

Right front door tweeter

GPS antenna

Right rear door woofer

DSM ECU

Left rear door woofer

OMS camera

To BCAN system

* For configuration with AVNT and 10.25-inch display

GAC Motor 2023

Electrics (I) 1-13 Intelligent multimedia system
1.2.3.2 Electrical schematic diagram

Clock spring

Steering wheel
To ACC power

switch
GWM
supply
To IG1 power
supply

To BAT power
supply
USB port 1

AV display

DSM ECU

SRS ECU Left front door woofer

Left front door tweeter

AMP
AV control unit (ACU)

Front dome lamp Right front door woofer

assembly
(microphone)

Right front door tweeter

4G antenna

Radio signal AM/FM antenna

Right rear door woofer

GPS antenna

Left rear door woofer

To BCAN system

To TCAN system

* For configuration with AVNT and 7-inch display

Intelligent multimedia system 1-14 Electrics (I)
1.2.3.3 Electrical schematic diagram

Clock spring

Steering wheel
To ACC power

switch
GWM
supply
To IG1 power
supply

To BAT power
supply
USB port 1

AV display Left front door woofer

AV control unit (ACU) Left front door tweeter

CCD
Right front door woofer

Right front door tweeter

Front dome lamp

assembly
(microphone) Right rear door woofer

Radio signal AM/FM antenna Left rear door woofer

To TCAN system

* For configuration with AV unit

GAC Motor 2023

Electrics (I) 1-15 Intelligent multimedia system
1.2.4 Diagnostic information and procedure (AVNT)
1.2.4.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of AVNT without removing any part.
Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.2.4.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. Then the same or similar conditions and environment when the user’s vehicle fails can be
simulated. No matter how experienced the maintenance personnel are and how skilled their technique is, if they do not
verify the symptoms before troubleshooting, they may ignore some critical concerns and give incorrect conjecture during
repair. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.2.4.3 ECU terminals
ACU harness connector (IP34)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.5/brown Left front seat headrest audio + － －
2 0.5/white Left front seat headrest audio + － －
3 0.5/white Left rear woofer + － －
4 0.5/pink Right rear woofer + － －
5 0.5/orange Left front seat headrest audio - － －
6 0.5/Gray Left front seat headrest audio - － －
7 0.5/Gray Left rear woofer - － －
8 0.5/green Right rear woofer - － －
11 1.0/red Battery power supply 1 － －
12 1.0/black Ground 1 － －
Intelligent multimedia system 1-16 Electrics (I)
ACU harness connector (IP35)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.5/yellow Left front tweeter + － －
2 0.5/pink Right front tweeter + － －
3 0.5/brown Left front woofer + － －
4 0.5/yellow Right front woofer + － －
5 0.5/orange Left front tweeter - － －
6 0.5/green Right front tweeter - — －
7 0.5/Purple Left front woofer - － －
8 0.5/orange Right front woofer - － －
9 0.35/black CCD ground － －
10 0.35/red IG1 power supply － －
0.5/ shielded
11 Microphone 1 signal shield GND － －
bare wire
12 0.35/Gray Microphone 1 signal — —
14 0.35/green ACC power supply － －
15 0.35/red CCD power supply － －
16 0.35/pink CCD video signal output － －
0.35/ shielded
17 CCD video signal shield GND － －
bare wire
AV display ACC power supply
18 0.35/pink － －
control
19 0.35/yellow BCAN-H — —
20 0.35/green BCAN-L － －
0.35/ shielded Steering wheel switch shield
23 － －
bare wire GND
Mode selection and Bluetooth
24 0.35/green － －
signal
25 0.35/blue Volume and FM control signal — —

GAC Motor 2023

Electrics (I) 1-17 Intelligent multimedia system
ACU harness connector (IP68)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / 4G antenna signal － －
2 / 4G-DRX antenna signal － －
3 / AM/FM antenna signal － －
4 / GPS antenna signal － －
5 / 4G antenna signal shielded cable － －
4G-DRX antenna signal shielded
6 / － －
cable
AM/FM antenna signal shielded
7 / － －
cable
GPS antenna signal shielded
8 / － －
cable

ACU harness connector (IP70)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.35/pink TCAN-H － －
2 0.35/orange TCAN-L － －
5 0.35/white Emergency rescue indicator lamp － －
6 0.35/pink Emergency rescue switch － －
7 0.35/yellow Roadside service switch － －
Intelligent multimedia system 1-18 Electrics (I)

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
Roadside service switch indicator
8 0.35/blue － －
lamp
9 0.35/yellow Collision input signal － －
11 0.35/pink Microphone signal － －
0.5/ shielded
12 Microphone ground － －
wire

1.2.4.4 Data list

Diagnostic Range
display/measurement Sub-data name Unit
item Min. Max.
Battery voltage - 7 18 V
Vehicle speed - 0 - km/h
Speed - - - rpm
Mileage - 0 25.5 V
Time of failure - year 0 2255 YY
Time of failure -
1 12 MM
month
Time of failure - day 1 31 DD
Current time Time of failure - hour 0 23 Hour
Time of failure _
0 59 min
minute
Time of failure _
0 59 s
second
Number of failures 0 65535 -
Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -

1.2.4.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

Check the output voltage of the microphone:
1. The internal circuit of the
MIC Input Circuit Shorted to ACU telematics module is faulty 1. If the voltage is abnormal, replace the
B1F0811
Ground microphone
2. The microphone is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the microphone:
1. The internal circuit of the
MIC Input Circuit Shorted to ACU telematics module is faulty 1. If the voltage is abnormal, replace the
B1F0814
Power Supply microphone
2. The microphone is faulty
2. If the voltage is normal, replace the ACU
2. Check the output voltage of the GPS antenna:
1. The ACU internal circuit is
CPS Antenna Open or Shorted faulty (1) If the voltage is abnormal, replace the GPS
B1F0113
to Power Supply antenna
2. The GPS antenna is faulty
(2) If the voltage is normal, replace the ACU
Check the output voltage of the GPS antenna:
1. The ACU internal circuit is
GPS Antenna Shorted to faulty 1. If the voltage is abnormal, replace the GPS
B1F0111
Ground antenna
2. The GPS antenna is faulty
2. If the voltage is normal, replace the ACU
1. The ACU internal circuit is
faulty 1. Check the antenna connector of the 4G module
2. The 4G module antenna is 2. Check the output voltage of the 4G module
4G Module Main Antenna
B1F0213 faulty antenna: (1) If the voltage is abnormal, replace
Open
3. The antenna connector of the 4G module antenna
the 4G module is not (2) If the voltage is normal, replace the ACU
connected

GAC Motor 2023

Electrics (I) 1-19 Intelligent multimedia system

DTC DTC definition Possible causes Recommended action

1. Check the antenna connector of the 4G module
1. The ACU internal circuit is 2. Check the output voltage of the 4G module
4G Module Main Antenna faulty antenna:
B1F0212
Shorted to Power Supply 2. The 4G module antenna is (1) If the voltage is abnormal, replace the 4G
faulty module antenna
(2) If the voltage is normal, replace the ACU
1. Check the antenna connector of the 4G module
1. The ACU internal circuit is 2. Check the output voltage of the 4G module
4G Module Main Antenna faulty antenna:
B1F0211
Shorted to Ground 2. The 4G module antenna is (1) If the voltage is abnormal, replace the 4G
faulty module antenna
(2) If the voltage is normal, replace the ACU
1. The ACU internal circuit is 1. Check the antenna connector of the 4G module
faulty
2. Check the output voltage of the 4G module
2. The 4G module antenna is antenna:
B1F0313 4G Module Sub-antenna Open faulty
(1) If the voltage is abnormal, replace the 4G
3. The antenna connector of module antenna
the 4G module is not
connected (2) If the voltage is normal, replace the ACU

1. Check the antenna connector of the 4G module

1. The ACU internal circuit is 2. Check the output voltage of the 4G module
4G Module Sub-antenna faulty antenna:
B1F0312
Shorted to Power Supply 2. The 4G module antenna is (1) If the voltage is abnormal, replace the 4G
faulty module antenna
(2) If the voltage is normal, replace the ACU
1. Check the antenna connector of the 4G module
1. The ACU internal circuit is 2. Check the output voltage of the 4G module
4G Module Sub-antenna faulty antenna:
B1F0311
Shorted to Ground 2. The 4G module antenna is (1) If the voltage is abnormal, replace the 4G
faulty module antenna
(2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check whether the emergency contact button is
faulty bonded:
B1F3000 Bcall Button Bonding Failure
2. The emergency contact 1. If it is bonded, replace the button
button has bonding failure 2. If the button isn’t bonded, replace the ACU
1. The ACU internal circuit is Check whether the rescue button is bonded:
faulty
B1F3100 Ecall Button Bonding Failure 1. If it is bonded, replace the button
2. The rescue button has
bonding failure 2. If the button isn’t bonded, replace the ACU

The SIM card of the ACU is

B1F6300 SIM Card Fault Replace the ACU
damaged
4G Module Communication The 4G module of the ACU is
B1F8404 Replace the ACU
Fault damaged
Check the output voltage of the rescue button
1. The ACU internal circuit is indicator lamp circuit:
E_Call Indicator Lamp Shorted faulty
B1F3111 1. If the voltage is abnormal, replace the GPS
to Ground 2. The circuit of the rescue antenna
button indicator lamp is faulty
2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the emergency
faulty contact button indicator lamp circuit:
B_Call Indicator Lamp Shorted
B1F3011 2. The circuit of the emergency 1. If the voltage is abnormal, replace the GPS
to Ground
contact button indicator lamp is antenna
faulty 2. If the voltage is normal, replace the ACU
B1F2008 OPEN CPU Overtemperature The ACU is faulty Replace the ACU
Camera Supply Voltage The power supply system of the Check whether the power supply harness of the
B27011C
Abnormal camera module is abnormal camera module is in good condition
1. Check whether the front camera harness is in
Front Camera Voltage good condition
B27101C The front camera is damaged
Abnormal
2. Replace the front camera
Intelligent multimedia system 1-20 Electrics (I)

DTC DTC definition Possible causes Recommended action

1. Check whether the rear camera harness is in
Rear Camera Voltage good condition
B27111C The rear camera is damaged
Abnormal
2. Replace the rear camera
1. Check whether the left camera harness is in
B27121C Left Camera Voltage Abnormal The left camera is damaged good condition
2. Replace the left camera
1. Check whether the right camera harness is in
Right Camera Voltage good condition
B27131C The right camera is damaged
Abnormal
2. Replace the right camera
1. Check whether the BCAN bus communication
is normal
U007388 CAN Node Offline The CAN bus is faulty
2. Switch off the power supply and restart the
vehicle network
1. The BCS module is 1. Check whether the BCS module harness is
BCS (0x260&0x29B) Signal damaged connected properly
U012987
Message Lost 2. The BCS communication 2. If it is connected properly, and the fault still
module is lost exists, replace the BCS module
1. Check whether the communication with BCS is
1. The BCS node bus normal. If not, replace it
communication is abnormal
BCS (0x260&0x29B) Signal 2. Check whether the communication with the
U048186 2. The BCS node bus
Message Data Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
1. Check whether the BCM harness is connected
BCM(0x25D) Signal Message 1. BCM damage properly
U014087
Lost 2. The BCM is lost 2. If it is connected properly, and the fault still
exists, replace the BCM
1. Check whether the communication with BCM is
BCM(0x25D) Signal Message The BCM node bus normal. If not, replace it
U042286
Data Abnormal communication is abnormal
2. If the bus message is normal, replace the ACU
1. The steering control of the
1. Check whether the steering module harness of
steering wheel is damaged
SAS(0x33D) Signal Message the steering wheel is connected properly
U012687 2. The steering communication
Lost 2. If it is connected properly, and the fault still
module of the steering wheel is
exists, replace the steering control module
lost
1. Check whether the communication with the
1. The SAS node bus steering angle sensor is normal; if it does not work
communication is abnormal normally, replace it
SAS(0x33D) Signal Message
U042886 2. The SAS node bus 2. Check whether the communication with the
Data Abnormal
communication forwarded by GWM is normal; if the GWM does not work
GWM is abnormal normally, replace it
3. If the bus message is normal, replace the ACU
1. Check the TCU connector
1. The TCU node bus 2. Check whether the communication with TCU is
communication is abnormal normal. If not, replace it
TCU (0x338) Signal Message
U010187 2. The TCU node bus 3. Check the GWM connector
Lost (Fuel-powered Vehicles)
communication forwarded by 4. Check whether the communication with the
GWM is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check whether the communication with TCU is
1. The TCU node bus normal. If not, replace it
TCU (0x338) Signal Message communication is abnormal
2. Check whether the communication with the
U040286 Data Abnormal (Fuel-powered 2. The TCU node bus GWM is normal; if the GWM does not work
Vehicles) communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU

GAC Motor 2023

Electrics (I) 1-21 Intelligent multimedia system

DTC DTC definition Possible causes Recommended action

1. Check the PAS connector
1. The PAS node bus 2. Check whether the communication with PAS is
communication is abnormal normal. If not, replace it
PAS_1 (0x343) Signal
U015987 2. The PAS node bus 3. Check the GWM connector
Message Lost
communication forwarded by 4. Check whether the communication with the
GWM is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check whether the communication with PAS is
1. The PAS node bus normal. If not, replace it
communication is abnormal
PAS_1 (0x343) Signal 2. Check whether the communication with the
U045A81 2. The PAS node bus
Message Data Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
1. Check the SRS ECU connector.
1. The SRS node bus 2. Check whether the communication with SRS
communication is abnormal ECU is normal. If not, replace it
SRS (0x208) Signal Message
U015187 2. The SRS node bus 3. Check the GWM connector
Lost
communication forwarded by 4. Check whether the communication with the
GWM is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check whether the communication with SRS
1. The SRS node bus ECU is normal. If not, replace it
communication is abnormal
SRS (0x208) Signal Message 2. Check whether the communication with the
U045281 2. The SRS node bus
Data Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
B271002 No Signal of Front Camera The front camera is damaged Replace the front camera
B271102 No Signal of Rear Camera The rear camera is damaged Replace the rear camera
B271202 No Signal of Left Camera The left camera is damaged Replace the left camera
B271302 No Signal of Right Camera The right camera is damaged Replace the right camera
1. Check whether the vehicle network
communication is normal
The unit is in a single-node
U007480 Limphome Activation Too Long 2. Check whether the connector of the unit node is
offline status
connected properly, and if not, it is recommended
to replace the unit node
1. Check the HVAC connector
Lost Communication with The communication with HVAC
U016487 2. Check whether the communication with the
HVAC node bus is abnormal
HVAC is normal; if not, replace it
1. Check the instrument cluster connector
The ICM node bus
U015587 Lost Communication with ICM 2. Check whether the communication with the
communication is abnormal
instrument cluster is normal; if not, replace it
1. Check the GWM connector
Lost Communication with The GWM node bus 2. Check whether the communication with the
U014687
GWM communication is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check the GWM connector
1. The BCAN network is 2. Check whether the communication with the
U044781 Received GWM Signal Invalid overloaded GWM is normal; if the GWM does not work
2. The GWM signal is abnormal normally, replace it
3. If the bus message is normal, replace the ACU
Intelligent multimedia system 1-22 Electrics (I)

DTC DTC definition Possible causes Recommended action

1. The BCAN network is 1. Check the HVAC connector

Received HVAC Node Signal overloaded 2. Check whether the communication with the
U042481
Invalid 2. The HVAC signal is HVAC is normal; if not, replace it
abnormal 3. If the bus message is normal, replace the ACU
Check whether the 12V power supply voltage of
The 12V power supply voltage the vehicle is normal
B1B0016 Low Battery Voltage
of the vehicle is too high 1. If the voltage is normal, replace the ACU
2. If the voltage is too low, replace the battery
Check whether the 12V power supply voltage of
The 12V power supply voltage the vehicle is normal
B1B0017 High Battery Voltage
of the vehicle is too low 1. If the voltage is normal, replace the ACU
2. If the voltage is too high, replace the battery

1. The ACU internal circuit is 1. Check the GPS antenna connector

faulty 2. Check the output voltage of the GPS antenna:
B1B4113 GPS Antenna Circuit Open 2. The GPS antenna is faulty (1) If the voltage is abnormal, replace the GPS
3. The GPS antenna connector antenna
is not connected (2) If the voltage is normal, replace the ACU
Check the output voltage of the GPS antenna:
1. The ACU internal circuit is
GPS Antenna Shorted to faulty 1. If the voltage is abnormal, replace the GPS
B1B4111
Ground antenna
2. The GPS antenna is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
faulty 1. If the voltage is abnormal, replace the radio
B1B4313 Radio Antenna Open
antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
Radio Antenna Failure - faulty 1. If the voltage is abnormal, replace the radio
B1B4011
Shorted to Gnd antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU

1.2.4.6 DTC: B1F0811, B1F0814

Diagnostic trouble code DTC definition

B1F0811 MIC Input Circuit Shorted to Ground
B1F0814 MIC Input Circuit Shorted to Power Supply

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-23 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Front dome lamp assembly

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the microphone 2 (front dome lamp assembly) and ACU is open.
Intelligent multimedia system 1-24 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the microphone 2 (front dome lamp
Microphone 2 ground
assembly) harness connector BD96.
C Disconnect the ACU harness connector IP70.
D Measure the resistance of circuit between terminal 15 of
the microphone 2 (front dome lamp assembly) harness
connector BD96 and terminal 11 of the ACU harness
connector IP70.
E Measure the resistance of circuit between terminal 16 of
the microphone 2 (front dome lamp assembly) harness
connector BD96 and terminal 12 of the ACU harness
Microphone 2 signal
connector IP70.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Front dome lamp assembly harness connector

Microphone 2 signal +

No Repair or replace the harness.

Microphone 2 signal shield

GND

Yes

Step 3 Check whether the circuit between the microphone 1 (front dome lamp assembly) and ACU is open.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Microphone 1 signal B Disconnect the microphone 1 (front dome lamp
assembly) harness connector BD96.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 14 of
the microphone 1 (front dome lamp assembly) harness
connector BD96 and terminal 11 of the ACU harness
connector IP35.
E Measure the resistance of circuit between terminal 13 of
the microphone 1 (front dome lamp assembly) harness
Microphone 1 signal
connector BD96 and terminal 12 of the ACU harness
shield GND connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-25 Intelligent multimedia system

Front dome lamp assembly harness connector

Microphone 1 signal +

Microphone 1 signal shield

GND

Yes

Step 4 Check if the microphone (front dome lamp assembly) circuit is shorted to ground.

Front dome lamp assembly harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
Microphone 1 signal + B Disconnect the microphone 1 (front dome lamp
assembly) harness connector BD96.
C Disconnect the ACU harness connectors IP70 and
IP35.
D Measure the resistance of circuit between terminal
13/14/15/16 of the microphone 1 (front dome lamp
assembly) harness connector BD96 and the body ground.
Standard resistance: 10kΩ or higher
Microphone 1 signal shield
GND E Verify if the resistance is consistent with the standard
value.

Front dome lamp assembly harness connector

Microphone 2 signal +

No Repair or replace the harness.

Microphone 2 signal shield

GND

Yes

Step 5 Check if the microphone (front dome lamp assembly) circuit is shorted to power supply.
Intelligent multimedia system 1-26 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Front dome lamp assembly harness connector
position.

Microphone 1 signal + B Disconnect the microphone (front dome lamp

assembly) harness connector BD96.
C Disconnect the ACU harness connectors IP70 and
IP35.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminals
13/14/15/16 of the microphone (front dome lamp
Microphone 1 signal shield assembly) harness connector BD96 and the body ground.
GND
Standard voltage: 0V
F Verify if the voltage is consistent with the standard
value.

Front dome lamp assembly harness connector

Microphone 2 signal +

No Repair or replace the harness.

Microphone 2 signal shield

GND

Yes

Step 6 Replace the microphone (front dome lamp assembly).

A Replace the microphone (front dome lamp assembly).

B Verify if the fault is eliminated after the microphone (front
dome lamp assembly) is replaced.

Yes The system is working normally.

No

Step 7 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

GAC Motor 2023

Electrics (I) 1-27 Intelligent multimedia system
1.2.4.7 DTC: B1F0113, B1F0111

Diagnostic trouble code DTC definition

B1F0113 CPS Antenna Open or Shorted to Power Supply
B1F0111 GPS Antenna Shorted to Ground
B1B4113 GPS Antenna Circuit Open
B1B4111 GPS Antenna Shorted to Ground
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

GPS antenna

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
Intelligent multimedia system 1-28 Electrics (I)

E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the GPS antenna circuit is open.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
GPS antenna signal B Disconnect the GPS antenna harness connector
IP82A.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 4
of the ACU harness connector IP68 and terminal 1 of the
GPS antenna harness connector IP82A.
E Measure the resistance of circuit between terminal 8
of the ACU harness connector IP68 and terminal 2 of the
GPS antenna harness connector IP82A.
GPS antenna signal shielded
cable Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GPS antenna harness connector

GPS antenna signal

No Repair or replace the harness.

GPS antenna GND

Yes

Step 3 Check whether the GPS antenna circuit is shorted to ground.

GAC Motor 2023

Electrics (I) 1-29 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
GPS antenna signal B Disconnect the GPS antenna harness connector
IP82A.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 4
of the ACU harness connector IP68 and the body ground.
E Measure the resistance of circuit between terminal 8
of the ACU harness connector IP68 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.
GPS antenna signal shielded
cable No Repair or replace the harness.

Yes

Step 4 Check whether the GPS antenna circuit is shorted to power supply.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
GPS antenna signal B Disconnect the GPS antenna harness connector
IP82A.
C Disconnect the ACU harness connector IP68.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 4 of
the ACU harness connector IP68 and the body ground.
F Measure the voltage of circuit between terminal 8 of
the ACU harness connector IP68 and the body ground.
Standard voltage: 0V
GPS antenna signal shielded
cable G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the GPS antenna.

A Replace the GPS antenna.

B Verify if the fault is eliminated after the GPS antenna is
replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.
Intelligent multimedia system 1-30 Electrics (I)

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.8 DTC: B1F0213, B1F0212......

Diagnostic trouble code DTC definition

B1F0213 4G Module Main Antenna Open
B1F0212 4G Module Main Antenna Shorted to Power Supply
B1F0211 4G Module Main Antenna Shorted to Ground

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

4G antenna

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-31 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the 4G main antenna (integrated antenna) circuit is open.

A Set the ENGINE START/STOP button to ―OFF‖

4G antenna harness connector position.
4G antenna GND
B Disconnect the 4G main antenna (integrated
antenna) harness connector IP81.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 1
of the ACU harness connector IP68 and terminal 1 of the
4G main antenna (integrated antenna) harness connector
IP81.
E Measure the resistance of circuit between terminal 5
of the ACU harness connector IP68 and terminal 3 of the
4G antenna signal
4G main antenna (integrated antenna) harness connector
IP81.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

4G antenna signal
shielded cable

No Repair or replace the harness.

4G antenna signal

Yes

Step 3 Check whether the 4G main antenna (integrated antenna) circuit is shorted to ground.
Intelligent multimedia system 1-32 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

4G antenna harness connector
position.
4G antenna GND B Disconnect the 4G main antenna (integrated
antenna) harness connector IP81.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 1
of the ACU harness connector IP68 and the body ground.
E Measure the resistance of circuit between terminal 5
of the ACU harness connector IP68 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
4G antenna signal
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the 4G main antenna (integrated antenna) circuit is shorted to power supply.

A Set the ENGINE START/STOP button to ―OFF‖

4G antenna harness connector
position.
4G antenna GND B Disconnect the 4G main antenna (integrated
antenna) harness connector IP81.
C Disconnect the ACU harness connector IP68.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the ACU harness connector IP68 and the body ground.
F Measure the voltage of circuit between terminal 5 of
the ACU harness connector IP68 and the body ground.
4G antenna signal Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the 4G main antenna (integrated antenna).

A Replace the 4G main antenna (integrated antenna).

B Verify if the fault is eliminated after the 4G main antenna
(integrated antenna) is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

GAC Motor 2023

Electrics (I) 1-33 Intelligent multimedia system

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.9 DTC: B1F0313, B1F0312......

Diagnostic trouble code DTC definition

B1F0313 4G Module Sub-antenna Open
B1F0312 4G Module Sub-antenna Shorted to Power Supply
B1F0311 4G Module Sub-antenna Shorted to Ground

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

4G antenna

2. Diagnostic procedure
Intelligent multimedia system 1-34 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the 4G sub-antenna (integrated antenna) circuit is open.

A Set the ENGINE START/STOP button to ―OFF‖

4G antenna harness connector position.
4G-AUX antenna GND
B Disconnect the 4G sub-antenna (integrated antenna)
harness connector IP81.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 2
of the ACU harness connector IP68 and terminal 2 of the
4G sub-antenna (integrated antenna) harness connector
IP81.
E Measure the resistance of circuit between terminal 6
of the ACU harness connector IP68 and terminal 4 of the
4G-AUX antenna signal
4G sub-antenna (integrated antenna) harness connector
IP81.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

4G-DRX antenna signal

shielded cable

No Repair or replace the harness.

4G-DRX antenna signal

Yes

Step 3 Check whether the 4G sub-antenna (integrated antenna) circuit is shorted to ground.

GAC Motor 2023

Electrics (I) 1-35 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
4G-DRX antenna signal
B Disconnect the 4G sub-antenna (integrated antenna)
shielded cable harness connector IP81.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 2
of the ACU harness connector IP68 and the body ground.
E Measure the resistance of circuit between terminal 6
of the ACU harness connector IP68 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.
4G-DRX antenna signal
No Repair or replace the harness.

Yes

Step 4 Check whether the 4G sub-antenna (integrated antenna) circuit is shorted to power supply.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
4G-DRX antenna signal B Disconnect the 4G sub-antenna (integrated antenna)
shielded cable harness connector IP81.
C Disconnect the ACU harness connector IP68.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 2 of
the ACU harness connector IP68 and the body ground.
F Measure the voltage of circuit between terminal 6 of
the ACU harness connector IP68 and the body ground.
Standard voltage: 0V
4G-DRX antenna signal G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the 4G sub-antenna (integrated antenna).

A Replace the 4G sub-antenna (integrated antenna).

B Verify if the fault is eliminated after the 4G sub-antenna
(integrated antenna) is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.
Intelligent multimedia system 1-36 Electrics (I)

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.10 DTC: B1F3000, B1F3100

Diagnostic trouble code DTC definition

B1F3000 Bcall Button Bonding Failure
B1F3100 Ecall Button Bonding Failure
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Front dome lamp assembly

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

GAC Motor 2023

Electrics (I) 1-37 Intelligent multimedia system

B Start the engine, read the DTC and record it.

C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the front dome lamp assembly and ACU is open.

Front dome lamp assembly harness connector A Set the ENGINE START/STOP button to ―OFF‖
position.
Emergency rescue signal B Disconnect the front dome lamp assembly harness
connector BD96.
C Disconnect the ACU harness connector IP70.
D Measure the resistance of circuit between terminal 4 of
the front dome lamp assembly harness connector BD96
and terminal 6 of the ACU harness connector IP70.
E Measure the resistance of circuit between terminal 6 of
the front dome lamp assembly harness connector BD96
Roadside service signal and terminal 7 of the ACU harness connector IP70.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Roadside service signal

No Repair or replace the harness.

Roadside service signal

Yes

Step 3 Check whether the circuit between the front dome lamp assembly and ACU is shorted to ground.
Intelligent multimedia system 1-38 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the front dome lamp assembly harness
Roadside service signal connector BD96.
C Disconnect the ACU harness connector IP70.
D Measure the resistance of circuit between terminal 6
of the ACU harness connector IP70 and the body ground.
E Measure the resistance of circuit between terminal 7
of the ACU harness connector IP70 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
Roadside service signal value.
No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the front dome lamp assembly and ACU is shorted to power supply.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the front dome lamp assembly harness
Roadside service signal
connector BD96. C Disconnect the ACU harness
connector IP70. D Set the ENGINE START/STOP
button to ―ON‖ position.
E Measure the voltage of circuit between terminal 6 of
the ACU harness connector IP70 and the body ground.
F Measure the voltage of circuit between terminal 7 of
the ACU harness connector IP70 and the body ground.
Standard voltage: 0V
Roadside service signal G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the front dome lamp assembly.

A Replace the front dome lamp assembly.

B Verify if the fault is eliminated after the front dome
lamp assembly is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

GAC Motor 2023

Electrics (I) 1-39 Intelligent multimedia system

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.11 DTC: B1F6300, B1F8404......

Diagnostic trouble code DTC definition

B1F6300 SIM Card Fault
B1F8404 4G Module Communication Fault
B1F2008 OPEN CPU Overtemperature

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure
Intelligent multimedia system 1-40 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground wires of the ACU.

A Check whether the power and ground wires of the

ACU are normal.

No Repair or replace the harness.

Yes

Step 3 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.2.4.12 DTC: B1F3111, B1F3011

Diagnostic trouble code DTC definition

B1F3111 E_Call Indicator Lamp Shorted to Ground
B1F3011 B_Call Indicator Lamp Shorted to Ground

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-41 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Front dome lamp assembly

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the front dome lamp assembly and ACU is open.
Intelligent multimedia system 1-42 Electrics (I)

Front dome lamp assembly harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
Emergency rescue indicator B Disconnect the front dome lamp assembly harness
lamp connector BD96.
C Disconnect the ACU harness connector IP70.
D Measure the resistance of circuit between terminal 1 of
the front dome lamp assembly harness connector BD96
and terminal 5 of the ACU harness connector IP70.
E Measure the resistance of circuit between terminal 3 of
the front dome lamp assembly harness connector BD96
Roadside service indicator and terminal 8 of the ACU harness connector IP70.
lamp
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Emergency rescue indicator

lamp

No Repair or replace the harness.

Roadside service indicator

lamp

Yes

Step 3 Check whether the circuit between the front dome lamp assembly and ACU is shorted to ground.

ACU harness connector A Set the ENGINE START/STOP button to ―OFF‖

position.
Emergency rescue indicator B Disconnect the front dome lamp assembly harness
lamp connector BD96.
C Disconnect the ACU harness connector IP70.
D Measure the resistance of circuit between terminal 5
of the ACU harness connector IP70 and the body ground.
E Measure the resistance of circuit between terminal 8
of the ACU harness connector IP70 and the body ground.

Roadside service indicator Standard resistance: 10kΩ or higher

lamp
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the front dome lamp assembly and ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-43 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.

Emergency rescue indicator

B Disconnect the front dome lamp assembly harness
lamp connector BD96.
C Disconnect the ACU harness connector IP70.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 5 of
the ACU harness connector IP70 and the body ground.
F Measure the voltage of circuit between terminal 8 of
Roadside service indicator
lamp the ACU harness connector IP70 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the front dome lamp assembly.

A Replace the front dome lamp assembly.

B Verify if the fault is eliminated after the front dome
lamp assembly is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.13 DTC: B27101C, B271002

Diagnostic trouble code DTC definition

B27101C Front Camera Voltage Abnormal
B271002 No Signal of Front Camera

1. Circuit diagram
Intelligent multimedia system 1-44 Electrics (I)

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the front SVM camera and the ACU.

GAC Motor 2023

Electrics (I) 1-45 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Front SVM camera harness connector position.
B Disconnect the front SVM camera harness connector
Front SVM camera video signal shield
GND
FB11.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the front SVM camera harness connector FB11 and
terminal 1 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the front SVM camera harness connector FB11 and
terminal 5 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
Front SVM camera video signal output F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Front SVM camera video signal shield

GND

No Repair or replace the harness.

Front SVM camera video signal output

Yes

Step 3 Check whether the front SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Front SVM camera harness connector position.
B Disconnect the front SVM camera harness connector
Front SVM camera video signal shield FB11.
GND
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the front SVM camera harness connector FB11 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the front SVM camera harness connector FB11 and the
body ground.
Standard resistance: 10kΩ or higher
Front SVM camera video signal output F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the font SVM camera circuit is shorted to power supply.
Intelligent multimedia system 1-46 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Front SVM camera harness connector
position.
Front SVM camera video signal shield B Disconnect the front SVM camera harness connector
GND FB11.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the front SVM camera harness connector FB11 and the
body ground.
Front SVM camera video signal output F Measure the voltage of circuit between terminal 2 of
the front SVM camera harness connector FB11 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the front SVM camera.

A Replace the front SVM camera.

B Verify if the fault is eliminated after the front SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.14 DTC: B27111C, B271102

Diagnostic trouble code DTC definition

B27111C Rear Camera Voltage Abnormal
B271102 No Signal of Rear Camera

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-47 Intelligent multimedia system

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the rear SVM camera and the ACU.
Intelligent multimedia system 1-48 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Rear SVM camera harness connector position.
B Disconnect the rear SVM camera harness connector
Rear SVM camera video signal shield GND TK23.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the rear SVM camera harness connector TK23 and
terminal 2 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the rear SVM camera harness connector TK23 and
terminal 6 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
Rear SVM camera video signal output
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Rear SVM camera video signal output

No Repair or replace the harness.

Rear SVM camera video signal shield GND

Yes

Step 3 Check whether the rear SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Rear SVM camera harness connector position.
B Disconnect the rear SVM camera harness connector
Rear SVM camera video signal shield GND TK23.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the rear SVM camera harness connector TK23 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the rear SVM camera harness connector TK23 and the
body ground.
Standard resistance: 10kΩ or higher
Rear SVM camera video signal output
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the rear SVM camera circuit is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-49 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Rear SVM camera harness connector position.

Rear SVM camera video signal shield GND B Disconnect the rear SVM camera harness connector
TK23.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the rear SVM camera harness connector TK23 and the
body ground.
Rear SVM camera video signal output F Measure the voltage of circuit between terminal 2 of
the rear SVM camera harness connector TK23 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the rear SVM camera.

A Replace the rear SVM camera.

B Verify if the fault is eliminated after the rear SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.15 DTC: B27121C, B271202

Diagnostic trouble code DTC definition

B27121C Left Camera Voltage Abnormal
B271202 No Signal of Left Camera

1. Circuit diagram
Intelligent multimedia system 1-50 Electrics (I)

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the left SVM camera and the ACU.

GAC Motor 2023

Electrics (I) 1-51 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Left SVM camera harness connector position.
B Disconnect the left SVM camera harness connector
Left SVM camera video signal shield GND DD13.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the left SVM camera harness connector DD13 and
terminal 3 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the left SVM camera harness connector DD13 and
terminal 7 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
Left SVM camera video signal
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Left SVM camera video signal shield GND

No Repair or replace the harness.

Left SVM camera video signal

Yes

Step 3 Check whether the left SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Left SVM camera harness connector position.
B Disconnect the left SVM camera harness connector
Left SVM camera video signal shield GND DD13.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the left SVM camera harness connector DD13 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the left SVM camera harness connector DD13 and the
body ground.
Standard resistance: 10kΩ or higher
Left SVM camera video signal
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the left SVM camera circuit is shorted to power supply.
Intelligent multimedia system 1-52 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Left SVM camera harness connector
position.

Left SVM camera video signal shield GND B Disconnect the left SVM camera harness connector
DD13.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the left SVM camera harness connector DD13 and the
body ground.
Left SVM camera video signal F Measure the voltage of circuit between terminal 2 of
the left SVM camera harness connector DD13 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the left SVM camera.

A Replace the left SVM camera.

B Verify if the fault is eliminated after the left SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.16 DTC: B27131C, B271302

Diagnostic trouble code DTC definition

B27131C Right Camera Voltage Abnormal
B271302 No Signal of Right Camera

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-53 Intelligent multimedia system

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the right SVM camera and the ACU.
Intelligent multimedia system 1-54 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Right SVM camera harness connector position.
B Disconnect the right SVM camera harness connector
Right SVM camera video signal shield PD13.
GND
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the right SVM camera harness connector PD13 and
terminal 4 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the right SVM camera harness connector PD13 and
terminal 8 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
Right SVM camera video signal
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Right SVM camera video signal shield

GND

No Repair or replace the harness.

Right SVM camera video signal

Yes

Step 3 Check whether the right SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Right SVM camera harness connector position.
B Disconnect the right SVM camera harness connector
Right SVM camera video signal shield PD13.
GND
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the right SVM camera harness connector PD13 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the right SVM camera harness connector PD13 and the
body ground.
Standard resistance: 10kΩ or higher
Right SVM camera video signal
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the right SVM camera circuit is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-55 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Right SVM camera harness connector position.

Right SVM camera video signal shield

B Disconnect the right SVM camera harness connector
GND PD13.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the right SVM camera harness connector PD13 and the
body ground.
Right SVM camera video signal F Measure the voltage of circuit between terminal 2 of
the right SVM camera harness connector PD13 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the right SVM camera.

A Replace the right SVM camera.

B Verify if the fault is eliminated after the right SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.17 DTC: U007388, U007480

Diagnostic trouble code DTC definition

U007388 CAN Node Offline
U007480 Limphome Activation Too Long

1. Circuit diagram
Intelligent multimedia system 1-56 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

GAC Motor 2023

Electrics (I) 1-57 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Measure the resistance of circuit between terminal 19
and terminal 20 of the ACU harness connector IP35.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of the ACU.

A Check whether the power and ground wires of the

ACU are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.2.4.18 DTC: U012987, U048186

Diagnostic trouble code DTC definition

U012987 BCS Signal Message Lost
U048186 BCS Signal Message Data Abnormal

1. Circuit diagram
Intelligent multimedia system 1-58 Electrics (I)

Instrument
panel PDU

AV control unit (ACU) ESPI

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ESPI and the GWM.

GAC Motor 2023

Electrics (I) 1-59 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ESPI harness connector position.
B Disconnect the ESPI harness connector FB04.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 7
of the ESPI harness connector FB04 and terminal 9 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 21
of the ESPI harness connector FB04 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
No Check the CAN data communication cable
for possible short circuit, open circuit and
false connection, or replace the harness.
Intelligent multimedia system 1-60 Electrics (I)

GWM harness connector

Yes

Step 4 Check the power and ground wires of ESPI.

A Check whether the power and ground wires of the

ESPI are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the ESPI.

A Replace the ESPI.

B Verify if the fault is eliminated after the ESPI is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-61 Intelligent multimedia system
1.2.4.19 DTC: U012987, U048186

Diagnostic trouble code DTC definition

U012987 BCS Signal Message Lost
U048186 BCS Signal Message Data Abnormal

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU) ESPI

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
Intelligent multimedia system 1-62 Electrics (I)

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ESPI and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ESPI harness connector
position.
B Disconnect the ESPI harness connector FB04.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 7
of the ESPI harness connector FB04 and terminal 9 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 21
of the ESPI harness connector FB04 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

GAC Motor 2023

Electrics (I) 1-63 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of ESPI.

A Check whether the power and ground wires of the

ESPI are normal.
No Repair or replace the harness.

Yes

Step 5 Replace the ESPI.

A Replace the ESPI.

B Verify if the fault is eliminated after the ESPI is
replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

Intelligent multimedia system 1-64 Electrics (I)

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.20 DTC: U014087, U042286

Diagnostic trouble code DTC definition

U014087 BCM Signal Lost
U042286 Invalid Frame Data Received from BCM

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Integrated BCM

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-65 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the BCM and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the BCM harness connector IP01.
D Measure the resistance of circuit between terminal 19 of
the ACU harness connector IP35 and terminal 42 of the
BCM harness connector IP01.
E Measure the resistance of the circuit between
terminal 20 of the ACU harness connector IP35 and
terminal 41 of the BCM harness connector IP01.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the BCM.

A Check whether the power and ground wires of the

BCM are normal.
Intelligent multimedia system 1-66 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the BCM.

A Replace the BCM.

B Verify if the fault is eliminated after the BCM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.4.21 DTC: U012687, U042886

Diagnostic trouble code DTC definition

U012687 SAS Signal Message Lost
U042886 SAS Signal Message Data Abnormal

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-67 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU) EPS ECU

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the EPS ECU and the GWM.
Intelligent multimedia system 1-68 Electrics (I)

EPS ECU harness connector A Set the ENGINE START/STOP button to ―OFF‖
position.
B Disconnect the EPS ECU harness connector IP17.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 7 of
the EPS ECU harness connector IP17 and terminal 9 of
the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 6 of
the EPS ECU harness connector IP17 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

GAC Motor 2023

Electrics (I) 1-69 Intelligent multimedia system

GWM harness connector

Yes

Step 4 Check the power and ground wires of the EPS ECU.

A Check whether the power and ground wires of the

EPS ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the EPS ECU.

A Replace the EPS ECU.

B Verify if the fault is eliminated after the EPS ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.
Intelligent multimedia system 1-70 Electrics (I)
1.2.4.22 DTC: U010187, U040286

Diagnostic trouble code DTC definition

U010187 TCU Signal Message Lost
U040286 TCU Signal Message Data Abnormal

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU) 7WDCT TCU

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

GAC Motor 2023

Electrics (I) 1-71 Intelligent multimedia system

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the 7WDCT TCU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

7WDCT TCU harness connector
position.
B Disconnect the 7WDCT TCU harness connector
EN55.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the 7WDCT TCU harness connector EN55 and terminal
14 of the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the 7WDCT TCU harness connector EN55 and terminal
34 of the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.
Intelligent multimedia system 1-72 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of the 7WDCT TCU.

A Check whether the power and ground wires of

7WDCT TCU are normal.
No Repair or replace the harness.

Yes

Step 5 Replace the 7WDCT TCU.

A Replace the 7WDCT TCU.

B Verify if the fault is eliminated after the 7WDCT TCU
is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-73 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.23 DTC: U015987, U045A81

Diagnostic trouble code DTC definition

U015987 PAS_1 Signal Message Lost
U045A81 PAS_1 Signal Message Data Abnormal

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU) RPA ECU

GWM

2. Diagnostic procedure
Intelligent multimedia system 1-74 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the RPA ECU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

RPA ECU harness connector
position.
B Disconnect the RPA ECU harness connector BD03.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 5 of
the RPA ECU harness connector BD03 and terminal 9 of
the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 4 of
the RPA ECU harness connector BD03 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

GAC Motor 2023

Electrics (I) 1-75 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of the RPA ECU.

A Check if the power and ground wires of the RPA

ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the RPA ECU.

A Replace the RPA ECU.

B Verify if the fault is eliminated after the RPA ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

Intelligent multimedia system 1-76 Electrics (I)

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.24 DTC: U015187, U045281

Diagnostic trouble code DTC definition

U015187 SRS Signal Message Lost
U045281 SRS Signal Message Data Abnormal

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU) SRS ECU

GWM

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-77 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the SRS ECU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

SRS ECU harness connector
position.
B Disconnect the SRS ECU harness connector BD05.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 12 of
the SRS ECU harness connector BD05 and terminal 14 of
the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 11 of
the SRS ECU harness connector BD05 and terminal 34 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.
Intelligent multimedia system 1-78 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of SRS ECU.

A Check whether the power and ground wires of the

SRS ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the SRS ECU.

A Replace the SRS ECU.

B Verify if the fault is eliminated after the SRS ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-79 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.4.25 DTC: U016487, U042481

Diagnostic trouble code DTC definition

U016487 Lost Communication with HVAC
U042481 Received HVAC Node Signal Invalid

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

HVAC control unit

2. Diagnostic procedure
Intelligent multimedia system 1-80 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the HVAC control unit and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the HVAC control unit harness connector
IP27.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 4 of the
HVAC control unit harness connector IP27.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 5 of the
HVAC control unit harness connector IP27.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

HVAC control unit harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the HVAC control unit.

A Check whether the power and ground wires of the

HVAC control unit are normal.

GAC Motor 2023

Electrics (I) 1-81 Intelligent multimedia system

No Repair or replace the harness.

Yes

Step 4 Replace the HVAC control unit.

A Replace the HVAC control unit.

B Verify if the fault is eliminated after the HVAC control unit
is replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.4.26 DTC: U014687, U044781

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM
U044781 Received GWM Signal Invalid

1. Circuit diagram
Intelligent multimedia system 1-82 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the GWM and the ACU.

GAC Motor 2023

Electrics (I) 1-83 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the GWM.

A Check whether the power and ground wires of GWM

are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

Intelligent multimedia system 1-84 Electrics (I)

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.4.27 DTC: U015587

Diagnostic trouble code DTC definition

U015587 Lost Communication with ICM

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Instrument cluster

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-85 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the instrument cluster and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

Instrument cluster harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the ICM harness connector IP06.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 2 of the
ICM harness connector IP06.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 1 of the
ICM harness connector IP06.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of instrument cluster.

A Check if the power and ground wires of ICM are

normal.
Intelligent multimedia system 1-86 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.4.28 DTC: B1B0016, B1B0017......

Diagnostic trouble code DTC definition

B1B0016 Low Battery Voltage
B1B0017 High Battery Voltage
B27011C Camera Supply Voltage Abnormal

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-87 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

Intelligent multimedia system 1-88 Electrics (I)

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the ACU fuses IF08, IF03, IF48 and IF26.

A Check if the fuses IF08, IF03, IF48 and IF26 are blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuits of fuses IF08, IF03, IF48 and IF26.

A Check if the circuits of fuses IF08, IF03, IF48 and

IF26 are shorted.
B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuses IF08, IF48, IF26 and IF203 are rated at 20A,
20A, 7.5A and 7.5A respectively.
D Verify if the ACU works normally.

Yes The system is working normally.

No

Step 5 Check the power supply circuit of the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
ACC power supply
B Disconnect the ACU harness connectors IP35 and
IP34.
C Set the ENGINE START/STOP button to ―ON‖
position.
D Measure the voltage of circuit between terminals 10
and 14 of the ACU harness connector IP35 and the body
ground.
E Measure the voltage of circuit between terminal 11 of
the ACU harness connector IP34 and the body ground.
IG1 power supply Standard voltage: 11~14V
F Verify if the voltage is consistent with the standard value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-89 Intelligent multimedia system

ACU harness connector

Battery power supply

Yes

Step 6 Check the ACU ground circuit.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP34.
C Measure the resistance of circuit between terminal 12
of the ACU harness connector IP34 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GND

Yes

Step 7 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.
Intelligent multimedia system 1-90 Electrics (I)
1.2.4.29 DTC: B1B4313, B1B4011

Diagnostic trouble code DTC definition

B1B4313 Radio Antenna Open
B1B4011 Radio Antenna Failure - Shorted to Gnd
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

AM/FM antenna

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

GAC Motor 2023

Electrics (I) 1-91 Intelligent multimedia system

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the AM/FM antenna and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
AM/FM antenna signal B Disconnect the AM/FM antenna harness connector
TK24.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of the circuit between
terminal 1 of the AM/FM antenna harness connector TK24
and terminal 3 of the ACU harness connector IP68.
E Measure the resistance of the circuit between
terminal 2 of the AM/FM antenna harness connector TK24
and terminal 7 of the ACU harness connector IP68.
AM/FM antenna signal shielded
cable Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

AM/FM antenna harness connector

AM/FM antenna signal

No Repair or replace the harness.

AM/FM antenna ground

Yes

Step 3 Check whether the AM/FM antenna circuit is shorted to ground.

Intelligent multimedia system 1-92 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

AM/FM antenna harness connector position.
AM/FM antenna signal
B Disconnect the AM/FM antenna harness connector
TK24.
C Disconnect the ACU harness connector IP68.
D Measure the resistance of circuit between terminal 1 of
the AM/FM antenna harness connector TK24 and the body
ground.
E Measure the resistance of circuit between terminal 2 of
the AM/FM antenna harness connector TK24 and the body
ground.
Standard resistance: 10kΩ or higher
AM/FM antenna ground F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the AM/FM antenna circuit is shorted to power supply.

A Set the ENGINE START/STOP button to ―OFF‖

AM/FM antenna harness connector
position.
AM/FM antenna signal B Disconnect the AM/FM antenna harness connector
TK24.
C Disconnect the ACU harness connector IP68.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of the
AM/FM antenna harness connector TK24 and the body
ground.
F Measure the voltage of circuit between terminal 2 of the
AM/FM antenna harness connector TK24 and the body
AM/FM antenna ground ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the AM/FM antenna.

A Replace the AM/FM antenna.

B Verify if the fault is eliminated after the AM/FM
antenna is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

GAC Motor 2023

Electrics (I) 1-93 Intelligent multimedia system

Yes The system is working normally.

Next (下一步)

Step 7 End.
Intelligent multimedia system 1-94 Electrics (I)
1.2.5 Diagnostic information and procedure
1.2.5.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of IHU without removing any part.
Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.2.5.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. Then the same or similar conditions and environment when the user’s vehicle fails can be
simulated. No matter how experienced the maintenance personnel are and how skilled their technique is, if they do not
verify the symptoms before troubleshooting, they may ignore some critical concerns and give incorrect conjecture during
repair. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.2.5.3 ECU terminals
ACU harness connector (IP34)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.5/brown Left front seat headrest audio + － －
2 0.5/white Left front seat headrest audio + － －
3 0.5/white Left rear woofer + － －
4 0.5/pink Right rear woofer + － －
5 0.5/orange Left front seat headrest audio - － －
6 0.5/Gray Left front seat headrest audio - － －
7 0.5/Gray Left rear woofer - － －
8 0.5/green Right rear woofer - － －
11 1.0/red Battery power supply 1 － －
12 1.0/black Ground 1 － －

GAC Motor 2023

Electrics (I) 1-95 Intelligent multimedia system
ACU harness connector (IP35)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.5/yellow Left front tweeter + － －
2 0.5/pink Right front tweeter + － －
3 0.5/brown Left front woofer + － －
4 0.5/yellow Right front woofer + － －
5 0.5/orange Left front tweeter - － －
6 0.5/green Right front tweeter - — －
7 0.5/Purple Left front woofer - － －
8 0.5/orange Right front woofer - － －
9 0.35/black CCD ground － －
10 0.35/red IG1 power supply － －
0.5/ shielded
11 Microphone 1 signal shield GND － －
bare wire
12 0.35/Gray Microphone 1 signal — —
14 0.35/green ACC power supply － －
15 0.35/red CCD power supply － －
16 0.35/pink CCD video signal output － －
0.35/ shielded
17 CCD video signal shield GND － －
bare wire
AV display ACC power supply
18 0.35/pink － －
control
19 0.35/yellow BCAN-H — —
20 0.35/green BCAN-L － －
0.35/ shielded Steering wheel switch shield
23 － －
bare wire GND
Mode selection and Bluetooth
24 0.35/green － －
signal
25 0.35/blue Volume and FM control signal — —
Intelligent multimedia system 1-96 Electrics (I)
ACU harness connector (IP36)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / USB1 data + － －
2 / USB1 power supply － －
3 / USB1 shielded wire － －
4 / USB1 data - － －
5 / USB1 shielded wire － －

ACU harness connector (IP43)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
7 / USB1 GND － －
9 / USB1 data + － －
10 / USB1 data - － －
12 / USB1 power supply － －
13 / USB1 shielded wire － －

GAC Motor 2023

Electrics (I) 1-97 Intelligent multimedia system
ACU harness connector (IP49)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
2 / HUD video signal － －
Instrument cluster display video
3 / － －
signal
4 / AV display video signal － －
6 / HUD video signal shielded cable － －
Instrument cluster display video
7 / － －
signal shielded cable
8 / Video signal shielded cable － －

ACU harness connector (IP61)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / AV control unit Ethernet _T1+ － －
2 / AV control unit Ethernet _T1- － －
Intelligent multimedia system 1-98 Electrics (I)
ACU harness connector (IP64)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / AVP video signal output － －
2 / DSM video signal output － －
4 / AR camera video signal output － －
5 / AVP video signal shielded cable － －
6 / DSM video signal shielded cable － －
AR camera video signal shielded
8 / － －
cable
ACU harness connector (IP69)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
Instrument cluster display
1 0.35/black － －
switching signal -
4 0.35/orange Oil pressure indicator lamp signal － －
Main fuel pump level sensor
5 0.35/pink － －
ground
Main fuel pump level sensor 5V
6 0.35/pink － －
power supply
Main fuel pump level sensor
9 0.35/brown － －
signal
Instrument cluster display
10 0.35/green － －
switching signal +
12 0.35/Gray Brake fluid level sensor signal － －

GAC Motor 2023

Electrics (I) 1-99 Intelligent multimedia system

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
13 0.35/Purple Instrument cluster display signal － －
19 0.35/pink Microphone signal － －
0.5/ shielded
20 Microphone ground － －
bare wire
24 0.35/brown Power amplifier return channel - － －
25 0.35/yellow Power amplifier return channel + － －
33 0.35/Purple T-BOX audio signal input - － －
34 0.35/pink T-BOX audio signal input + － －
ACU harness connector (IP67)
ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
2 / GPS antenna signal － －
3 / AM/FM antenna signal － －
GPS antenna signal shielded
6 / － －
cable
AM/FM antenna signal shielded
7 / － －
cable

1.2.5.4 Data list

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.

Vehicle speed 0 240 km/h

Engine speed 0 8000 r/min
Operating voltage 0 25.5 V
Mileage 0 999999 km
Time of failure - year 0 2255 YY
DTC freeze frame data Time of failure - month 1 12 MM
Time of failure - day 1 31 DD
Time of failure - hour 0 23 Hour
Time of failure _ minute 0 59 min
Time of failure _
0 59 s
second
Intelligent multimedia system 1-100 Electrics (I)

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.

Number of failures 0 65535 -

Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -
Fuel value - 0 65535 -
Mileage that can be
- 0 255 km
reduced

1.2.5.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

1. The module of ACU sending Check the vehicle BCAN bus load rate:
BCAN message fails
1. If the bus load is abnormal, find out the ECU that causes
U007388 B-CAN Bus Offline 2. The vehicle BCAN bus load the high bus load rate
rate is too high, resulting in
failure to send messages 2. If the bus load is normal, replace the ACU

1. The other ECU connector on Check the vehicle ACAN bus load rate:
the vehicle bus is not connected
Limphome 1. If the bus load is abnormal, find out the ECU that causes
U007480 2. The other ECU connector on
Activation Too Long the high bus load rate
the vehicle bus is abnormal and
there is no message 2. If the bus load is normal, replace the ACU

1. The BCM communication is 1. Check the other ECU connectors of the vehicle
Lost communication lost
U014087 2. If the connectors are normal, check whether the message
with BCM
2. The BCM is damaged on the bus is normal

Lost 1. The HVAC communication is 1. Check the HVAC connector

U016487 Communication lost 2. Check whether the communication with the HVAC is
with HVAC 2. The HVAC is damaged. normal; if not, replace it
1. Check the PAS connector
Lost 1. The PAS communication is
lost 2. Check whether the communication with PAS is normal. If
U015987 Communication
not, replace it
with PAS 2. The PAS is damaged
3. If the bus message is normal, replace the ACU

Lost 1. The GWM communication is 1. Check the GWM connector

U014687 Communication lost 2. Check whether the communication with the GWM is
with GWM 2. The GWM is damaged normal; if the GWM does not work normally, replace it

Lost 1. The telematics 1. Check the telematics connector

U019887 Communication communication is lost 2. Check whether the communication with the telematics is
with TBOX 2. The telematics is damaged normal; if not, replace it
1. The GWM communication is 1. Check the GWM connector
Received GWM lost
U044781 2. Check whether the communication with the GWM is
Signal Invalid
2. The GWM is damaged normal; if the GWM does not work normally, replace it
1. Check the HVAC connector
1. The HVAC communication is
Received HVAC lost 2. Check whether the communication with the HVAC is
U042481
Node Signal Invalid normal; if not, replace it
2. The HVAC is damaged
3. If the bus message is normal, replace the ACU

GAC Motor 2023

Electrics (I) 1-101 Intelligent multimedia system

DTC DTC definition Possible causes Recommended action

Check whether the 12V power supply voltage of
The 12V power supply voltage the vehicle is normal
B1B0016 Low Battery Voltage
of the vehicle is too high 1. If the voltage is normal, replace the ACU
2. If the voltage is too low, replace the battery
Check whether the 12V power supply voltage of
The 12V power supply voltage the vehicle is normal
B1B0017 High Battery Voltage
of the vehicle is too low 1. If the voltage is normal, replace the ACU
2. If the voltage is too high, replace the battery
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
Radio Antenna Shorted to faulty 1. If the voltage is abnormal, replace the radio
B1B4012
Power Supply antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the GPS antenna:
1. The ACU internal circuit is
GPS Antenna Shorted to faulty 1. If the voltage is abnormal, replace the GPS
B1B4112
Power Supply antenna
2. The GPS antenna is faulty
2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is 1. Check the GPS antenna connector

faulty 2. Check the output voltage of the GPS antenna:
B1B4113 GPS Antenna Circuit Open 2. The GPS antenna is faulty (1) If the voltage is abnormal, replace the GPS
3. The GPS antenna connector antenna
is not connected (2) If the voltage is normal, replace the ACU
Check the output voltage of the GPS antenna:
1. The ACU internal circuit is
GPS Antenna Shorted to faulty 1. If the voltage is abnormal, replace the GPS
B1B4111
Ground antenna
2. The GPS antenna is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
faulty 1. If the voltage is abnormal, replace the radio
B1B4313 Radio Antenna Open
antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the microphone:
1. The internal circuit of the
MIC Power Supply Shorted to ACU telematics module is faulty 1. If the voltage is abnormal, replace the
B1B4411
Gnd microphone
2. The microphone is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
Radio Antenna Failure - faulty 1. If the voltage is abnormal, replace the radio
B1B4011
Shorted to Gnd antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the HD CCD:
SD CCD (Active) Shorted to faulty
B1BE411 1. If it is abnormal, replace the HD CCD
Gnd
2. The HD CCD is faulty 2. If the voltage is normal, replace the ACU
1. Check whether the front display connector is
1. The ACU internal circuit is connected properly
faulty
Front Display Connection 2. Check the output voltage of the front display:
B1BE579 2. The front display is faulty
Failure (1) If the voltage is abnormal, replace the front
3. The front display connector display
is not connected
(2) If the voltage is normal, replace the ACU
1. The instrument signal cable 1. Reconnect the signal cable and the power
LCD Instrument Connection connector is loose supply cable
B1BE679
Failure
2. The instrument is damaged. 2. Replace the LCD instrument

1. The ACU internal circuit is 1. Check whether the HD CCD connector is

faulty connected properly
SD AVM/CCD Connection 2. The HD CCD (AVM 2. Check the output voltage of the HD CCD:
B1BE779
Failure reserved) is faulty (1) If the voltage is abnormal, replace the HD
3. The HD CCD connector is CCD
not connected (2) If the voltage is normal, replace the ACU
Intelligent multimedia system 1-102 Electrics (I)

DTC DTC definition Possible causes Recommended action

Connection Failure Displayed The LVDS harness connected Check the continuity of the LVDS harness
B1BF179 by External OMS Node LVDS to the ACU and the cabin connected to the ACU and the cabin monitoring
Video Stream monitoring system is abnormal system
Connection Failure Displayed The LVDS harness connected
Check the continuity of the LVDS harness
B1BF279 by External FAPA Node LVDS to the ACU and the VPA is
connected to the ACU and the VPA
Video Stream abnormal
Connection Failure Displayed The LVDS harness connected
Check the continuity of the LVDS harness
B1BF379 by External SVM Node LVDS to the ACU and the panoramic
connected to the ACU and the panoramic camera
Video Stream camera is abnormal
Connection Failure Displayed The LVDS harness connected
Check the continuity of the LVDS harness
B1BF479 by External HUD Node LVDS to the ACU and the HUD is
connected to the ACU and the HUD
Video Stream abnormal

1. The ACU internal circuit is Check whether the steering wheel Mode button is
Steering Wheel Button (Mode) faulty bonded:
B1B31F0
Failure 2. The steering wheel Mode 1. If it is bonded, replace the button
button has bonding failure 2. If the button isn’t bonded, replace the ACU
1. The ACU internal circuit is Check whether the steering wheel VolumeDown
faulty button is bonded:
Steering Wheel Button
B1B31F1 2. The steering wheel
(Volume Down) Failure 1. If it is bonded, replace the button
VolumeDown button has
bonding failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel VolumeUp
faulty button is bonded:
Steering Wheel Button
B1B31F2 2. The steering wheel
(Volume Up) Failure 1. If it is bonded, replace the button
VolumeUp button has bonding
failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel ChannelDown
faulty button is bonded:
Steering Wheel Button
B1B31F3 2. The steering wheel
(Channel Down) Failure 1. If it is bonded, replace the button
ChannelDown button has
bonding failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel ChannelUp
faulty button is bonded:
Steering Wheel Button
B1B31F4 2. The steering wheel
(Channel up) Failure 1. If it is bonded, replace the button
ChannelUp button has bonding
failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel Mute button is
Steering Wheel Button (Mute) faulty bonded:
B1B31F5
Failure 2. The steering wheel Mute 1. If it is bonded, replace the button
button has bonding failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel Pickup button
Steering Wheel Button faulty is bonded:
B1B31F6
(Pickup) Failure 2. The steering wheel Pickup 1. If it is bonded, replace the button
button has bonding failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel Hangup button
Steering Wheel Button faulty is bonded:
B1B31F7
(Hangup) Failure 2. The steering wheel Hangup 1. If it is bonded, replace the button
button has bonding failure 2. If the button isn’t bonded, replace the ACU
Steering Wheel Button (VR) 1. The ACU internal circuit is Check whether the steering wheel VR button is
B1B31F8
Failure faulty bonded:

GAC Motor 2023

Electrics (I) 1-103 Intelligent multimedia system

DTC DTC definition Possible causes Recommended action

2. The steering wheel VR 1. If it is bonded, replace the button

button has bonding failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check whether the steering wheel custom button
Steering Wheel Button faulty is bonded:
B1B31F9
(Custom Button) Failure 2. The steering wheel custom 1. If it is bonded, replace the button
buttons has bonding failure 2. If the button isn’t bonded, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left front horn:
Left Front Horn Circuit Shorted faulty
B1BE012 1. If the voltage is abnormal, replace the horn
to Power Supply
2. The left front horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left front horn:
Left Front Horn Circuit Shorted faulty
B1BE011 1. If the voltage is abnormal, replace the horn
to Ground
2. The left front horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is 1. Check whether the left front horn connector is
faulty connected properly
B1BE013 Left Front Horn Circuit Open 2. The left front horn is faulty 2. Check the output voltage of the left front horn:
3. The left front horn connector (1) If the voltage is abnormal, replace the horn
is not connected (2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the right front horn:
Right Front Horn Circuit faulty
B1BE112 1. If the voltage is abnormal, replace the horn
Shorted to Power Supply
2. The right front horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the right front horn:
Right Front Horn Circuit faulty
B1BE111 1. If the voltage is abnormal, replace the horn
Shorted to Ground
2. The right front horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is 1. Check whether the right front horn connector is
faulty connected properly
B1BE113 Right Front Horn Circuit Open 2. The right front horn is faulty 2. Check the output voltage of the right front horn:
3. The right front horn (1) If the voltage is abnormal, replace the horn
connector is not connected (2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left rear horn:
Left Rear Horn Circuit Shorted faulty
B1BE212 1. If the voltage is abnormal, replace the horn
to Power Supply
2. The left rear horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left rear horn:
Left Rear Horn Circuit Shorted faulty
B1BE211 1. If the voltage is abnormal, replace the horn
to Gnd
2. The left rear horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is 1. Check whether the left rear horn connector is
faulty connected properly
B1BE213 Left Rear Horn Circuit Open 2. The left rear horn is faulty 2. Check the output voltage of the left rear horn:
3. The left rear horn connector (1) If the voltage is abnormal, replace the horn
is not connected (2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the right rear horn:
Right Rear Horn Circuit faulty
B1BE312 1. If the voltage is abnormal, replace the horn
Shorted to Power Supply
2. The right rear horn is faulty 2. If the voltage is normal, replace the ACU

Right Rear Horn Circuit 1. The ACU internal circuit is Check the output voltage of the right rear horn:
B1BE311
Shorted to Gnd faulty 1. If the voltage is abnormal, replace the horn
Intelligent multimedia system 1-104 Electrics (I)

DTC DTC definition Possible causes Recommended action

2. The right rear horn is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is 1. Check whether the right rear horn connector is
faulty connected properly
B1BE313 Right Rear Horn Circuit Open 2. The right rear horn is faulty 2. Check the output voltage of the right rear horn:
3. The right rear horn connector (1) If the voltage is abnormal, replace the horn
is not connected (2) If the voltage is normal, replace the ACU
1. The ACU has internal fault
1. Replace the ACU
B182011 Fuel Circuit Shorted to Ground 2. The ACU connector circuit is
2. Check the connector and replace it
shorted

Fuel Circuit Shorted to Power 1. The ACU has internal fault 1. Replace the ACU
B182012
Supply or Open-circuited 2. The ACU connector is faulty 2. Check the connector and replace it
1. The ACU has internal fault 1. Replace the ACU
B186044 Falsh Module Error
2. The EEPROM is damaged 2. Replace the LCD instrument
1. The instrument cluster signal
is lost 1. Replace the instrument cluster audible alarm
Instrument Cluster Audible module
B18DE96 2. The instrument cluster
Alarm Module Error
audible alarm module is 2. Check whether the signal is sent correctly
damaged
1. Low motherboard voltage
results in abnormal start
B1B8199 Motherboard Temperature Low Replace the instrument cluster
2. The motherboard is
damaged
1. The motherboard is
Motherboard Temperature overloaded
B1B8198 Replace the instrument cluster
High 2. The motherboard is
damaged
1. The external temperature is
B1BF098 Amplifier Temperature High too high Replace the amplifier
2. The amplifier is damaged
1. The gyro operation fails
B1B4299 Gyro Temperature Low Replace the ACU
2. The gyro is damaged
1. The gyro is overloaded
B1B4298 Gyro Temperature High Replace the ACU
2. The gyro is burned
Check the output voltage of the left front
1. The internal circuit of the microphone:
Left Front MIC Power Supply ACU telematics module is faulty
B1B4396 1. If the voltage is abnormal, replace the
Shorted to Gnd 2. The left front microphone is microphone
faulty
2. If the voltage is normal, replace the ACU
1. Check whether the left front microphone
1. The internal circuit of the connector is connected properly
ACU telematics module is faulty
2. Check the output voltage of the left front
Left Front MIC Power Supply 2. The left front microphone is microphone:
B1B4395
Open-circuited faulty
(1) If the voltage is abnormal, replace the
3. The left front microphone microphone
connector is not connected
(2) If the voltage is normal, replace the ACU
Check the output voltage of the right front
1. The internal circuit of the microphone:
Right Front MIC Power Supply ACU telematics module is faulty
B1B4394 1. If the voltage is abnormal, replace the
Shorted to Gnd 2. The right front microphone is microphone
faulty
2. If the voltage is normal, replace the ACU
1. Check whether the right front microphone
1. The internal circuit of the connector is connected properly
ACU telematics module is faulty
2. Check the output voltage of the right front
Right Front MIC Power Supply 2. The right front microphone is microphone:
B1B4393
Open-circuited faulty
(1) If the voltage is abnormal, replace the
3. The right front microphone microphone
connector is not connected
(2) If the voltage is normal, replace the ACU
Check the output voltage of the left front
Left Rear MIC Power Supply 1. The internal circuit of the microphone:
B1B4496
Shorted to Gnd ACU telematics module is faulty 1. If the voltage is abnormal, replace the
microphone

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Electrics (I) 1-105 Intelligent multimedia system

DTC DTC definition Possible causes Recommended action

2. The left rear microphone is
2. If the voltage is normal, replace the ACU
faulty
1. Check whether the left rear microphone
1. The internal circuit of the connector is connected properly
ACU telematics module is faulty
2. Check the output voltage of the left rear
Left Rear MIC Power Supply 2. The left rear microphone is microphone:
B1B4495
Open-circuited faulty
(1) If the voltage is abnormal, replace the
3. The left rear microphone microphone
connector is not connected
(2) If the voltage is normal, replace the ACU
Check the output voltage of the right rear
1. The internal circuit of the microphone:
Right Rear MIC Power Supply ACU telematics module is faulty
B1B4494 1. If the voltage is abnormal, replace the
Shorted to Gnd 2. The right rear microphone is microphone
faulty
2. If the voltage is normal, replace the ACU
1. Check whether the right rear microphone
1. The internal circuit of the connector is connected properly
ACU telematics module is faulty
2. Check the output voltage of the right rear
Right Rear MIC Power Supply 2. The right rear microphone is microphone:
B1B4493
Open-circuited faulty
(1) If the voltage is abnormal, replace the
3. The right rear microphone microphone
connector is not connected
(2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left front horn 2:
Left Front Horn 2 Circuit faulty
B1BE412 1. If the voltage is abnormal, replace the horn
Shorted to Power Supply
2. The left front horn 2 is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left front horn 2:
Left Front Horn 2 Circuit faulty
B1BE411 1. If the voltage is abnormal, replace the horn
Shorted to Ground
2. The left front horn 2 is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is 1. Check whether the left front horn 2 connector is
faulty connected properly
B1BE413 Left Front Horn 2 Circuit Open 2. The left front horn 2 is faulty 2. Check the output voltage of the left front horn 2:
3. The left front horn 2 (1) If the voltage is abnormal, replace the horn
connector is not connected (2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the right front horn 2:
Right Front Horn 2 Circuit faulty
B1BE712 1. If the voltage is abnormal, replace the horn
Shorted to Power Supply
2. The right front horn 2 is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the right front horn 2:
Right Front Horn 2 Circuit faulty
B1BE711 1. If the voltage is abnormal, replace the horn
Shorted to Ground
2. The right front horn 2 is faulty 2. If the voltage is normal, replace the ACU
1. Check whether the right front horn 2 connector
1. The ACU internal circuit is is connected properly
faulty
Right Front Horn 2 Circuit 2. Check the output voltage of the right front horn
B1BE713 2. The right front horn 2 is faulty 2:
Open
3. The right front horn 2 (1) If the voltage is abnormal, replace the horn
connector is not connected
(2) If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left rear horn 2:
Left Rear Horn 2 Circuit faulty
B1BE812 1. If the voltage is abnormal, replace the horn
Shorted to Power Supply
2. The left rear horn 2 is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the left rear horn 2:
Left Rear Horn 2 Circuit faulty
B1BE811 1. If the voltage is abnormal, replace the horn
Shorted to Gnd
2. The left rear horn 2 is faulty 2. If the voltage is normal, replace the ACU
1. Check whether the left rear horn 2 connector is
1. The ACU internal circuit is connected properly
B1BE813 Left Rear Horn 2 Circuit Open faulty
2. Check the output voltage of the left rear horn 2:
2. The left rear horn 2 is faulty
(1) If the voltage is abnormal, replace the horn
Intelligent multimedia system 1-106 Electrics (I)

DTC DTC definition Possible causes Recommended action

3. The left rear horn 2
(2) If the voltage is normal, replace the ACU
connector is not connected

1. The ACU internal circuit is Check the output voltage of the right rear horn 2:
Right Rear Horn 2 Circuit faulty
B1BE912 1. If the voltage is abnormal, replace the horn
Shorted to Power Supply
2. The right rear horn 2 is faulty 2. If the voltage is normal, replace the ACU

1. The ACU internal circuit is Check the output voltage of the right rear horn 2:
Right Rear Horn 2 Circuit faulty
B1BE911 1. If the voltage is abnormal, replace the horn
Shorted to Gnd
2. The right rear horn 2 is faulty 2. If the voltage is normal, replace the ACU
1. Check whether the right rear horn 2 connector
1. The ACU internal circuit is is connected properly
faulty
Right Rear Horn 2 Circuit 2. Check the output voltage of the right rear horn
B1BE913 2. The right rear horn 2 is faulty 2:
Open
3. The right rear horn 2 (1) If the voltage is abnormal, replace the horn
connector is not connected
(2) If the voltage is normal, replace the ACU

1.2.5.6 DTC: U007480, U007388

Diagnostic trouble code DTC definition

U007480 Limphome Activation Too Long
U007388 B-CAN Bus Offline

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-107 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

Intelligent multimedia system 1-108 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Measure the resistance of circuit between terminal 19
and terminal 20 of the ACU harness connector IP35.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of the ACU.

A Check whether the power and ground wires of the

ACU are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.2.5.7 DTC: U014087

Diagnostic trouble code DTC definition

U014087 Lost communication with BCM

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-109 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Integrated BCM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ACU and the integrated BCM.
Intelligent multimedia system 1-110 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the integrated BCM harness connector IP01.
D Measure the resistance of circuit between terminal 19 of
the ACU harness connector IP35 and terminal 42 of the
integrated BCM harness connector IP01.
E Measure the resistance of the circuit between
terminal 21 of the ACU harness connector IP20 and
terminal 41 of the integrated BCM harness connector IP01.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the integrated BCM.

A Check whether the power and ground wires of the

integrated BCM are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-111 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.5.8 DTC: U016487, U042481

Diagnostic trouble code DTC definition

U016487 Lost Communication with HVAC
U042481 Received HVAC Node Signal Invalid

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

HVAC control unit

2. Diagnostic procedure
Intelligent multimedia system 1-112 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the ACU and the HVAC control unit.

A Set the ENGINE START/STOP button to ―OFF‖

HVAC control unit harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the HVAC control unit harness connector
IP27.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 4 of the
HVAC control unit harness connector IP27.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 5 of the
HVAC control unit harness connector IP27.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the HVAC control unit.

A Check whether the power and ground wires of the

HVAC control unit are normal.

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Electrics (I) 1-113 Intelligent multimedia system

No Repair or replace the harness.

Yes

Step 4 Replace the HVAC control unit.

A Replace the HVAC control unit.

B Verify if the fault is eliminated after the HVAC control unit
is replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.5.9 DTC: U015987

Diagnostic trouble code DTC definition

U015987 Lost Communication with PAS

1. Circuit diagram
Intelligent multimedia system 1-114 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

FAPA ECU

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ACU and the FAPA ECU.

GAC Motor 2023

Electrics (I) 1-115 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the FAPA ECU harness connector BD55.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 38 of the
FAPA ECU harness connector BD55.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 18 of the
FAPA ECU harness connector BD55.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

FAPA ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the FAPA ECU.

A Check whether the power and ground wires of the

FAPA ECU are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the FAPA ECU.

A Replace the FAPA ECU .

B Verify if the fault is eliminated after the FAPA ECU is
replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

Intelligent multimedia system 1-116 Electrics (I)

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.5.10 DTC: U014687, U044781

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM
U044781 Received GWM Signal Invalid

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

GWM

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-117 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the ACU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the GWM.

A Check whether the power and ground wires of GWM

are normal.
Intelligent multimedia system 1-118 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.5.11 DTC: U019887

Diagnostic trouble code DTC definition

U019887 Lost Communication with TBOX

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-119 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU) T-BOX ECU

GWM (Ethernet)

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the TCAN data communication cable between the GWM and the T-BOX ECU.
Intelligent multimedia system 1-120 Electrics (I)

GWM harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
B Disconnect the GWM harness connector IP63.
C Disconnect the T-BOX ECU harness connector IP23.
D Measure the resistance of circuit between terminal 13
of the GWM harness connector IP63 and terminal 6 of the
T-BOX ECU harness connector IP23.
E Measure the resistance of circuit between terminal 33
of GWM harness connector IP63 and terminal 21 of T-BOX
ECU harness connector IP23.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

T-BOX ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the BCAN data communication cable between the ACU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP23.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 11 of the
GWM harness connector IP63.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 31 of the
GWM harness connector IP63.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

GAC Motor 2023

Electrics (I) 1-121 Intelligent multimedia system

GWM harness connector

Yes

Step 4 Check the power and ground wires of the T-BOX.

A Check whether the power and ground wires of the T-

BOX are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the T-BOX.

A Replace the T-BOX.

B Verify if the fault is eliminated after the T-BOX is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.
Intelligent multimedia system 1-122 Electrics (I)
1.2.5.12 DTC: B1B0016, B1B0017

Diagnostic trouble code DTC definition

B1B0016 Low Battery Voltage
B1B0017 High Battery Voltage
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

GAC Motor 2023

Electrics (I) 1-123 Intelligent multimedia system

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the ACU fuses IF03, IF08 and IF26.

A Check whether the fuses IF03, IF08 and IF26 are

blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuits of fuses IF03, IF28 and IF26.

A Check whether the circuits of fuses IF03, IF28 and

IF26 are shorted.
B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuses IF03, IF08 and IF26 are rated at 7.5A, 20A and
7.5A respectively.
D Verify if the ACU works normally.

Yes The system is working normally.

No

Step 5 Check the power supply circuit of the ACU.

Intelligent multimedia system 1-124 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
IG1 power supply
B Disconnect the ACU harness connectors IP35 and
IP34.
C Set the ENGINE START/STOP button to ―ON‖
position.
D Measure the voltage of circuit between terminals 10
and 14 of the ACU harness connector IP35 and the body
ground.
E Measure the voltage of circuit between terminal 11 of
the ACU harness connector IP34 and the body ground.
ACC power supply Standard voltage: 11~14V
F Verify if the voltage is consistent with the standard value.

ACU harness connector

No Repair or replace the harness.

Battery power supply

Yes

Step 6 Check the ACU ground circuit.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP34.
C Measure the resistance of circuit between terminal 12
of the ACU harness connector IP34 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GND

Yes

Step 7 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-125 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.2.5.13 DTC: B1B4012, B1B4313......

Diagnostic trouble code DTC definition

B1B4012 Radio Antenna Shorted to Power Supply
B1B4313 Radio Antenna Open
B1B4011 Radio Antenna Failure - Shorted to Gnd

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

AM/FM antenna

2. Diagnostic procedure
Intelligent multimedia system 1-126 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the AM/FM antenna and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

Radio antenna harness connector position.
AM/FM antenna signal B Disconnect the AM/FM antenna harness connector
TK24.
C Disconnect the ACU harness connector IP67.
D Measure the resistance of the circuit between
terminal 1 of the AM/FM antenna harness connector TK24
and terminal 3 of the ACU harness connector IP67.
E Measure the resistance of the circuit between
terminal 2 of the AM/FM antenna harness connector TK24
and terminal 7 of the ACU harness connector IP67.
AM/FM antenna ground
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

AM/FM antenna signal

No Repair or replace the harness.

AM/FM antenna signal shield

GND

Yes

Step 3 Check whether the circuit between the AM/FM antenna and the ACU is shorted to ground.

GAC Motor 2023

Electrics (I) 1-127 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the AM/FM antenna harness connector
AM/FM antenna signal
TK24.
C Disconnect the ACU harness connector IP67.
D Measure the resistance of circuit between terminal 3
of the ACU harness connector IP67 and the body ground.
E Measure the resistance of circuit between terminal 7
of the ACU harness connector IP67 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.
AM/FM antenna signal shield
GND Repair or replace the harness.
No

Yes

Step 4 Check whether the circuit between the AM/FM antenna and the ACU is shorted to power supply.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
AM/FM antenna signal B Disconnect the AM/FM antenna harness connector
TK24.
C Disconnect the ACU harness connector IP67.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 3 of
the ACU harness connector IP67 and the body ground.
F Measure the voltage of circuit between terminal 7 of
the ACU harness connector IP67 and the body ground.
AM/FM antenna signal shield Standard voltage: 0V
GND
G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the AM/FM antenna.

A Replace the AM/FM antenna.

B Verify if the fault is eliminated after the AM/FM
antenna is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.
Intelligent multimedia system 1-128 Electrics (I)

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.14 DTC: B1B4112, B1B4113......

Diagnostic trouble code DTC definition

B1B4112 GPS Antenna Shorted to Power Supply
B1B4113 GPS Antenna Circuit Open
B1B4111 GPS Antenna Shorted to Ground

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

GPS antenna

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-129 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the GPS antenna and the ACU.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
GPS antenna signal B Disconnect the GPS antenna harness connector
IP82.
C Disconnect the ACU harness connector IP67.
D Measure the resistance of the circuit between
terminal 1 of the GPS antenna harness connector IP82
and terminal 2 of the ACU harness connector IP67.
E Measure the resistance of the circuit between
terminal 3 of the GPS antenna harness connector IP82
GPS antenna signal shield
and terminal 6 of the ACU harness connector IP67.
GND
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GPS antenna harness connector

GPS antenna signal

No Repair or replace the harness.

GPS antenna signal shield

GND

Yes

Step 3 Check whether the circuit between the GPS antenna and the ACU is shorted to ground.
Intelligent multimedia system 1-130 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
GPS antenna signal B Disconnect the GPS antenna harness connector
IP82.
C Disconnect the ACU harness connector IP67.
D Measure the resistance of circuit between terminal 2
of the ACU harness connector IP67 and the body ground.
E Measure the resistance of circuit between terminal 6
of the ACU harness connector IP67 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
GPS antenna signal shield value.
GND
No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the GPS antenna and the ACU is shorted to power supply.

ACU harness connector A Set the ENGINE START/STOP button to ―OFF‖

position.
GPS antenna signal B Disconnect the GPS antenna harness connector
IP82.
C Disconnect the ACU harness connector IP67.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 2 of
the ACU harness connector IP67 and the body ground.
F Measure the voltage of circuit between terminal 6 of
the ACU harness connector IP67 and the body ground.
GPS antenna signal shield Standard voltage: 0V
GND
G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the GPS antenna.

A Replace the GPS antenna.

B Verify if the fault is eliminated after the GPS antenna is
replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

GAC Motor 2023

Electrics (I) 1-131 Intelligent multimedia system

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.15 DTC: B1BE411, B1BE779

Diagnostic trouble code DTC definition

B1BE411 HD CCD (Active) Shorted to Gnd
B1BE779 HD AVM/CCD Connection Failure
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Rear SVM camera

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

Intelligent multimedia system 1-132 Electrics (I)

B Start the engine, read the DTC and record it.

C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the rear SVM camera and the ACU is open.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Rear SVM camera video signal shielded
cable B Disconnect the rear SVM camera harness connector
TK23 and the ACU harness connector IP65.
C Measure the resistance of circuit between terminal 1
of the rear SVM camera harness connector TK23 and
terminal 2 of the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 2
of the rear SVM camera harness connector TK23 and
terminal 6 of the ACU harness connector IP65.
Rear SVM camera video signal output Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Rear SVM camera harness connector

Rear SVM camera video signal shield

GND

No Repair or replace the harness.

Rear SVM camera video signal output

Yes

Step 3 Check whether the rear SVM camera circuit is shorted to ground.

GAC Motor 2023

Electrics (I) 1-133 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
Rear SVM camera video signal shielded B Disconnect the rear SVM camera harness connector
cable TK23 and the ACU harness connector IP65.
C Measure the resistance of circuit between terminal 2
of the ACU harness connector IP65 and the body ground.
D Measure the resistance of circuit between terminal 6
of the ACU harness connector IP65 and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.
Rear SVM camera video signal output
No Repair or replace the harness.

Yes

Step 4 Check whether the rear SVM camera circuit is shorted to power supply.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
Rear SVM camera video signal shielded B Disconnect the rear SVM camera harness connector
cable TK23 and the ACU harness connector IP65.
C Set the ENGINE START/STOP button to ―ON‖
position.
D Measure the voltage of circuit between terminal 2 of the
ACU harness connector IP65 and the body ground.
E Measure the voltage of circuit between terminal 6 of
the ACU harness connector IP65 and the body ground.
Standard voltage: 0V
Rear SVM camera video signal output F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the rear SVM camera.

A Replace the rear SVM camera.

B Verify if the fault is eliminated after the rear SVM
camera is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.
Intelligent multimedia system 1-134 Electrics (I)

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.16 DTC: B1BE679

Diagnostic trouble code DTC definition

B1BE679 LCD Instrument Connection Failure
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Instrument cluster display (10.25-inch AV display (14.6-inch touch screen)

TFT display)

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.

GAC Motor 2023

Electrics (I) 1-135 Intelligent multimedia system

C Clear the DTC.

D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the instrument cluster display and the ACU is open.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the instrument cluster display harness
connectors IP100 and IP28.
C Disconnect the ACU harness connectors IP69 and
IP49.
D Measure the resistance of circuit between terminal 5
of the instrument cluster display harness connector IP100
and terminal 13 of the ACU harness connector IP69.
E Measure the resistance of circuit between terminal 1
Instrument cluster display signal of the instrument cluster display harness connector IP28
and terminal 3 of the ACU harness connector IP49.
F Measure the resistance between terminal 2 of the
instrument cluster display harness connector IP28 and
terminal 7 of the ACU harness connector IP49.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Instrument cluster display harness connector

No Repair or replace the harness.

Instrument cluster display signal

Intelligent multimedia system 1-136 Electrics (I)

Instrument cluster display harness connector

Instrument cluster display video signal

Instrument cluster display video signal

shielded cable

Instrument cluster display harness connector

Video signal +

GND

Yes

Step 3 Check whether the circuit between the instrument cluster display and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the instrument cluster display harness
connectors IP100 and IP28.
C Disconnect the ACU harness connectors IP69 and
IP49.
D Measure the resistance of circuit between terminal 13
of the ACU harness connector IP69 and the body ground.
E Measure the resistance of circuit between terminal 3
of the ACU harness connector IP49 and the body ground.
Instrument cluster display signal
F Measure the resistance of circuit between terminal 7
of the ACU harness connector IP49 and the body ground.
Standard resistance: 10kΩ or higher
G Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-137 Intelligent multimedia system

Instrument cluster display harness connector

Instrument cluster display video signal

Instrument cluster display video signal

shielded cable

Yes

Step 4 Check whether the circuit between the instrument cluster display and the ACU is shorted to power supply.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the instrument cluster display harness
connectors IP100 and IP28.
C Disconnect the ACU harness connectors IP69 and
IP49.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 13 of
the ACU harness connector IP69 and the body ground.
F Measure the voltage of circuit between terminal 3 of
Instrument cluster display signal the ACU harness connector IP49 and the body ground.
G Measure the voltage of circuit between terminal 7 of
the ACU harness connector IP49 and the body ground.
Standard voltage: 0V
H Verify if the voltage is consistent with the standard value.

Instrument cluster display harness connector

Instrument cluster display video signal

No Repair or replace the harness.

Instrument cluster display video signal

shielded cable

Yes

Step 5 Check the power supply and ground circuits of the instrument cluster display.
Intelligent multimedia system 1-138 Electrics (I)

A Check if the power supply and ground circuits of the

instrument cluster display are normal.

No Repair or replace the harness.

Yes

Step 6 Replace the instrument cluster display.

A Replace the instrument cluster display.

B Verify if the fault is eliminated after the instrument
cluster display is replaced.

Yes The system is working normally.

No

Step 7 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.2.5.17 DTC: B1BE579

Diagnostic trouble code DTC definition

B1BE579 Front Display Connection Failure

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-139 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Instrument cluster display (10.25-inch AV display (14.6-inch touch screen)

TFT display)

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the AV display and the ACU is open.
Intelligent multimedia system 1-140 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the AV display harness connectors IP35
and IP49.
C Disconnect the ACU harness connectors IP74 and
IP92.
D Measure the resistance of circuit between terminal 5 of
the AV display harness connector IP74 and terminal 18 of
the ACU harness connector IP35.
E Measure the resistance of circuit between terminal 1
AV display ACC power supply control of the AV display harness connector IP92 and terminal 4
of the ACU harness connector IP49.
F Measure the resistance of circuit between terminal 2 of
the AV display harness connector IP92 and terminal 8 of
the ACU harness connector IP49.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

AV display harness connector

ACC power supply control

No Repair or replace the harness.

AV display harness connector

Video signal -

Video signal +

GAC Motor 2023

Electrics (I) 1-141 Intelligent multimedia system

ACU harness connector

AV display video signal

Video signal shielded

cable

Yes

Step 3 Check whether the circuit between the AV display and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the AV display harness connectors IP74
and IP92.
C Disconnect the ACU harness connectors IP35 and
IP49.
D Measure the resistance of circuit between terminal 18
of the ACU harness connector IP35 and the body ground.
E Measure the resistance of circuit between terminal 4
of the ACU harness connector IP49 and the body ground.
AV display ACC power supply
control F Measure the resistance of circuit between terminal 8
of the ACU harness connector IP49 and the body ground.
Standard resistance: 10kΩ or higher
G Verify if the resistance is consistent with the standard
value.

ACU harness connector

AV display video signal

No Repair or replace the harness.

Video signal shielded cable

Yes

Step 4 Check whether the circuit between the AV display and the ACU is shorted to power supply.
Intelligent multimedia system 1-142 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the AV display harness connectors IP74
and IP92.
C Disconnect the ACU harness connectors IP35 and
IP49.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 18 of
the ACU harness connector IP35 and the body ground.
F Measure the voltage of circuit between terminal 4 of
AV display ACC power supply the ACU harness connector IP49 and the body ground.
control
G Measure the voltage of circuit between terminal 8 of
the ACU harness connector IP49 and the body ground.
Standard voltage: 0V
H Verify if the voltage is consistent with the standard value.

ACU harness connector

AV display video signal

No Repair or replace the harness.

Video signal shielded cable

Yes

Step 5 Check the power supply and ground circuits of the AV display.

A Check if the power supply and ground circuits of the

AV display are normal.
No Repair or replace the harness.

Yes

Step 6 Replace the AV display.

A Replace the AV display.

B Verify if the fault is eliminated after the AV display is
replaced.
Yes The system is working normally.

No

Step 7 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-143 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.2.5.18 DTC: B1B31F0, B1B31F1......

Diagnostic trouble code DTC definition

B1B31F0 Steering Wheel Button (Mode) Failure
B1B31F1 Steering Wheel Button (Volume Down) Failure
B1B31F2 Steering Wheel Button (Volume Up) Failure
B1B31F3 Steering Wheel Button (Channel Down) Failure
B1B31F4 Steering Wheel Button (Channel up) Failure
B1B31F5 Steering Wheel Button (Mute) Failure
B1B31F6 Steering Wheel Button (Pickup) Failure
B1B31F7 Steering Wheel Button (Hangup) Failure
B1B31F8 Steering Wheel Button (VR) Failure
B1B31F9 Steering Wheel Button (Custom Button) Failure

1. Circuit diagram
Intelligent multimedia system 1-144 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

Clock spring

Volume and Function Switch Steering

radio channel switching and ground
selection Bluetooth
wheel switch

AM/FM antenna

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the clock spring and the ACU.

GAC Motor 2023

Electrics (I) 1-145 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Clock spring harness connector position.
B Disconnect the clock spring harness connector IP10.
Switch ground Function
switching and C Disconnect the ACU harness connector IP35.
Bluetooth D Measure the resistance of the circuit between
terminal 2 of the clock spring harness connector IP10 and
terminal 23 of the ACU harness connector IP35.
E Measure the resistance of the circuit between
terminal 3 of the clock spring harness connector IP10 and
terminal 25 of the ACU harness connector IP35.
Volume and radio F Measure the resistance of the circuit between
channel selection
terminal 4 of the clock spring harness connector IP10 and
terminal 24 of the ACU harness connector IP35.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

ACU harness connector

Function switching and

Bluetooth

No Repair or replace the harness.

Switch ground Volume and radio

channel selection

Yes

Step 3 Check the circuit between the clock spring and the multifunctional steering wheel switch.

A Set the ENGINE START/STOP button to ―OFF‖

position.
B Disconnect the clock spring harness connector and
the multifunctional steering wheel switch harness
connector.
C Measure the resistance of the circuit between the
terminals of the clock spring harness connector and the
multifunctional steering wheel switch harness connector.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Replace the multifunctional steering wheel switch.

A Replace the multifunctional steering wheel switch.

B Verify if the fault is eliminated after the multifunctional
steering wheel switch is replaced.
Intelligent multimedia system 1-146 Electrics (I)

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.5.19 DTC: B1BE012, B1BE011......

Diagnostic trouble code DTC definition

B1BE012 Left Front Horn Circuit Shorted to Power Supply
B1BE011 Left Front Horn Circuit Shorted to Ground
B1BE013 Left Front Horn Circuit Open

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-147 Intelligent multimedia system

Instrument
panel PDU Left rear door woofer Right rear door woofer

Speaker + Speaker - Speaker + Speaker -

AV control unit (ACU)
Speaker + Speaker - Speaker + Speaker - Speaker + Speaker - Speaker + Speaker -

Left front door woofer Left front door tweeter Right front door woofer Right front door tweeter

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the left front door woofer and the ACU.
Intelligent multimedia system 1-148 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
Left front door woofer +
B Disconnect the left front door woofer harness
connector DD06.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 1
of the left front door woofer harness connector DD06 and
terminal 7 of the ACU harness connector IP35.
E Measure the resistance of circuit between terminal 2
of the left front door woofer harness connector DD06 and
Left front door woofer - terminal 3 of the ACU harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left front door woofer harness connector

Left front door woofer +

No Repair or replace the harness.

Left front door woofer -

Yes

Step 3 Check whether the circuit between the left front door woofer and the ACU is shorted to ground.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
Left front door woofer +
B Disconnect the left front door woofer harness
connector DD06.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 3
of the ACU harness connector IP35 and the body ground.
E Measure the resistance of circuit between terminal 7
of the ACU harness connector IP35 and the body ground.
Left front door woofer - Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the left front door woofer and the ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-149 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Left front door woofer +
B Disconnect the left front door woofer harness
connector DD06.
C Disconnect the ACU harness connector IP35.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 3 of
the ACU harness connector IP35 and the body ground.
Left front door woofer - F Measure the voltage of circuit between terminal 7 of
the ACU harness connector IP35 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the left front door woofer.

A Replace the left front door woofer.

B Verify if the fault is eliminated after the left front door
woofer is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.20 DTC: B1BE112, B1BE111......

Diagnostic trouble code DTC definition

B1BE112 Right Front Horn Circuit Shorted to Power Supply
B1BE111 Right Front Horn Circuit Shorted to Ground
B1BE113 Right Front Horn Circuit Open

1. Circuit diagram
Intelligent multimedia system 1-150 Electrics (I)

Instrument
panel PDU Left rear door woofer Right rear door woofer

Speaker + Speaker - Speaker + Speaker -

AV control unit (ACU)
Speaker + Speaker - Speaker + Speaker - Speaker + Speaker - Speaker + Speaker -

Left front door woofer Left front door tweeter Right front door woofer Right front door tweeter

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the right front door woofer and the ACU.

GAC Motor 2023

Electrics (I) 1-151 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Right front door woofer +
B Disconnect the right front door woofer harness
connector PD06.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 1 of
the right front door woofer harness connector PD06 and
terminal 8 of the ACU harness connector IP35.
E Measure the resistance of circuit between terminal 2 of
the right front door woofer harness connector PD06 and
Right front door woofer - terminal 4 of the ACU harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front door woofer harness connector

Right front door woofer +

No Repair or replace the harness.

Right front door woofer -

Yes

Step 3 Check whether the circuit between the right front door woofer and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Right front door woofer +
B Disconnect the right front door woofer harness
connector PD06.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 4
of the ACU harness connector IP35 and the body ground.
E Measure the resistance of circuit between terminal 8
of the ACU harness connector IP35 and the body ground.
Right front door woofer - Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the right front door woofer and the ACU is shorted to power supply.
Intelligent multimedia system 1-152 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Right front door woofer +
B Disconnect the right front door woofer harness
connector PD06.
C Disconnect the ACU harness connector IP35.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 4 of
the ACU harness connector IP35 and the body ground.
Right front door woofer - F Measure the voltage of circuit between terminal 8 of
the ACU harness connector IP35 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the right front door woofer.

A Replace the right front door woofer.

B Verify if the fault is eliminated after the right front
door woofer is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.21 DTC: B1BE212, B1BE211......

Diagnostic trouble code DTC definition

B1BE212 Left Rear Horn Circuit Shorted to Power Supply
B1BE211 Left Rear Horn Circuit Shorted to Gnd
B1BE213 Left Rear Horn Circuit Open

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-153 Intelligent multimedia system

Instrument
panel PDU Left rear door woofer Right rear door woofer

Speaker + Speaker - Speaker + Speaker -

AV control unit (ACU)
Speaker + Speaker - Speaker + Speaker - Speaker + Speaker - Speaker + Speaker -

Left front door woofer Left front door tweeter Right front door woofer Right front door tweeter

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the left rear door woofer and the ACU.
Intelligent multimedia system 1-154 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Left rear door woofer +
B Disconnect the left rear door woofer harness
connector LD04.
C Disconnect the ACU harness connector IP34.
D Measure the resistance of circuit between terminal 1
of the left rear door woofer harness connector LD04 and
terminal 7 of the ACU harness connector IP34.
E Measure the resistance of circuit between terminal 2
of the left rear door woofer harness connector LD04 and
Left rear door woofer - terminal 3 of the ACU harness connector IP34.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left rear door woofer harness connector

Left rear door woofer +

No Repair or replace the harness.

Left rear door woofer -

Yes

Step 3 Check whether the circuit between the left rear door woofer and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Left rear door woofer +
B Disconnect the left rear door woofer harness
connector LD04.
C Disconnect the ACU harness connector IP34.
D Measure the resistance of circuit between terminal 3
of the ACU harness connector IP34 and the body ground.
E Measure the resistance of circuit between terminal 7
of the ACU harness connector IP34 and the body ground.
Standard resistance: 10kΩ or higher
Left rear door woofer -
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the left rear door woofer and the ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-155 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Left rear door woofer +
B Disconnect the left rear door woofer harness
connector LD04.
C Disconnect the ACU harness connector IP34.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 3 of
the ACU harness connector IP34 and the body ground.
F Measure the voltage of circuit between terminal 7 of
Left rear door woofer -
the ACU harness connector IP34 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the left rear door woofer.

A Replace the left rear door woofer.

B Verify if the fault is eliminated after the left rear door
woofer is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.22 DTC: B1BE312, B1BE311......

Diagnostic trouble code DTC definition

B1BE312 Right Rear Horn Circuit Shorted to Power Supply
B1BE311 Right Rear Horn Circuit Shorted to Gnd
B1BE313 Right Rear Horn Circuit Open

1. Circuit diagram
Intelligent multimedia system 1-156 Electrics (I)

Instrument
panel PDU Left rear door woofer Right rear door woofer

Speaker + Speaker - Speaker + Speaker -

AV control unit (ACU)
Speaker + Speaker - Speaker + Speaker - Speaker + Speaker - Speaker + Speaker -

Left front door woofer Left front door tweeter Right front door woofer Right front door tweeter

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the right rear door woofer and the ACU.

GAC Motor 2023

Electrics (I) 1-157 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Right rear door woofer harness connector
position.
Right rear door woofer + B Disconnect the right rear door woofer harness
connector RD04.
C Disconnect the ACU harness connector IP34.
D Measure the resistance of circuit between terminal 1 of
the right rear door woofer harness connector RD04 and
terminal 8 of the ACU harness connector IP34.
E Measure the resistance of circuit between terminal 2 of
the right rear door woofer harness connector RD04 and
Right rear door woofer - terminal 4 of the ACU harness connector IP34.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Right rear door woofer +

No Repair or replace the harness.

Right rear door woofer -

Yes

Step 3 Check whether the circuit between the right rear door woofer and the ACU is shorted to ground.

ACU harness connector A Set the ENGINE START/STOP button to ―OFF‖

position.
Right rear door woofer +
B Disconnect the right rear door woofer harness
connector RD04.
C Disconnect the ACU harness connector IP34.
D Measure the resistance of circuit between terminal 4
of the ACU harness connector IP34 and the body ground.
E Measure the resistance of circuit between terminal 8
of the ACU harness connector IP34 and the body ground.
Standard resistance: 10kΩ or higher
Right rear door woofer -
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the right rear door woofer and the ACU is shorted to power supply.
Intelligent multimedia system 1-158 Electrics (I)

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
Right rear door woofer +
B Disconnect the right rear door woofer harness
connector RD04.
C Disconnect the ACU harness connector IP34.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 4 of
the ACU harness connector IP34 and the body ground.
F Measure the voltage of circuit between terminal 8 of
Right rear door woofer - the ACU harness connector IP34 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the right rear door woofer.

A Replace the right rear door woofer.

B Verify if the fault is eliminated after the right rear door
woofer is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.23 DTC: B182011, B182012

Diagnostic trouble code DTC definition

B182011 Fuel Circuit Shorted to Ground
B182012 Fuel Circuit Shorted to Power Supply or Open-circuited

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-159 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Integrated BCM

Clock
spring

Multifunctional Fuel pump

steering wheel
switch Fuel level sensor

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the main fuel pump and the ACU.
Intelligent multimedia system 1-160 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Main fuel pump sensor 5V B Disconnect the main fuel pump harness connector
power supply BD04.
C Disconnect the ACU harness connector IP69.
D Measure the resistance of circuit between terminal 2
of the main fuel pump harness connector BD04 and
terminal 9 of the ACU harness connector IP69.
E Measure the resistance of circuit between terminal 3
of the main fuel pump harness connector BD04 and
terminal 5 of the ACU harness connector IP69.
Main fuel pump Main fuel pump F Measure the resistance of circuit between terminal 4
sensor signal sensor ground
of the main fuel pump harness connector BD04 and
terminal 6 of the ACU harness connector IP69.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Main fuel pump harness connector

Main fuel pump

sensor ground

No Repair or replace the harness.

Main fuel pump Main fuel pump sensor 5V

sensor signal power supply

Yes

Step 3 Check whether the circuit between the main fuel pump and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Main fuel pump harness connector
position.
Main fuel pump B Disconnect the main fuel pump harness connector
sensor ground
BD04.
C Disconnect the ACU harness connector IP69.
D Measure the resistance of circuit between terminal 2
of the fuel pump harness connector BD04 and the body
ground.
E Measure the resistance of circuit between terminal 3
of the fuel pump harness connector BD04 and the body
Main fuel pump Main fuel pump sensor 5V ground.
sensor signal power supply F Measure the resistance of circuit between terminal 4
of the fuel pump harness connector BD04 and the body
ground.
Standard resistance: 10kΩ or higher
G Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the main fuel pump and the ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-161 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Main fuel pump harness connector
position.
Main fuel pump
sensor ground B Disconnect the main fuel pump harness connector
BD04.
C Disconnect the ACU harness connector IP69.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 2 of
the fuel pump harness connector BD04 and the body
Main fuel pump Main fuel pump sensor 5V ground.
sensor signal power supply
F Measure the voltage of circuit between terminal 3 of
the fuel pump harness connector BD04 and the body
ground.
G Measure the voltage of circuit between terminal 4 of
the fuel pump harness connector BD04 and the body
ground.
Standard voltage: 0V
H Verify if the voltage is consistent with the standard value.

No Repair or replace the harness.

Yes

Step 5 Replace the main fuel pump.

A Replace the main fuel pump.

B Verify if the fault is eliminated after the main fuel
pump is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.24 DTC: B1BF098

Diagnostic trouble code DTC definition

B1BF098 Amplifier Temperature High

1. Circuit diagram
Intelligent multimedia system 1-162 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

AMP

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the AMP.

GAC Motor 2023

Electrics (I) 1-163 Intelligent multimedia system

A Check whether there is retrofitted or modified line for the

AMP.

Yes Remove the retrofitted or modified line to

ensure the normal ventilation of the AMP.

No

Step 3 Check the CAN data communication cable between the ACU and the AMP.

HVAC control unit harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the AMP harness connector BD110.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 1 of the
AMP harness connector BD110.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 2 of the
AMP harness connector BD110.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power supply and ground circuits of the AMP.

A Check whether the power supply and ground circuits of

the AMP are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the AMP.

Intelligent multimedia system 1-164 Electrics (I)

A Replace the AMP.

B Verify if the fault is eliminated after the AMP is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.25 DTC: B1B4396, B1B4395

Diagnostic trouble code DTC definition

B1B4396 Left Front MIC Power Supply Shorted to Gnd
B1B4395 Left Front MIC Power Supply Open-circuited

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-165 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Front dome lamp

assembly

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the left front microphone (front dome lamp assembly) and ACU.
Intelligent multimedia system 1-166 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the left front microphone (front dome
Left front microphone
signal
lamp assembly) harness connector BD96.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 13 of
the left front microphone (front dome lamp assembly)
harness connector BD96 and terminal 12 of the ACU
harness connector IP35.
E Measure the resistance of circuit between terminal 14 of
the left front microphone (front dome lamp assembly)
harness connector BD96 and terminal 11 of the ACU
Left front microphone signal shield
GND
harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Front dome lamp assembly harness connector

Left front microphone

signal +

No Repair or replace the harness.

Left front microphone signal shield

GND

Yes

Step 3 Check whether the circuit between the left front microphone (front dome lamp assembly) and ACU is shorted
to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the left front microphone (front dome
Left front microphone lamp assembly) harness connector BD96.
signal
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 11
of the ACU harness connector IP35 and the body ground.
E Measure the resistance of circuit between terminal 12
of the ACU harness connector IP35 and the body ground.
Standard resistance: 10 kΩ or higher
F Verify if the resistance is consistent with the standard
Left front microphone signal shield value.
GND
No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the left front microphone (front dome lamp assembly) and ACU is shorted
to power supply.

GAC Motor 2023

Electrics (I) 1-167 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.

Left front microphone

B Disconnect the left front microphone (front dome
signal lamp assembly) harness connector BD96.
C Disconnect the ACU harness connector IP35.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 11 of
the ACU harness connector IP35 and the body ground.
F Measure the voltage of circuit between terminal 12 of
Left front microphone signal shield
GND
the ACU harness connector IP35 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the left front microphone (front dome lamp assembly).

A Replace the left front microphone (front dome lamp

assembly).
B Verify if the fault is eliminated after the left front
microphone (front dome lamp assembly) is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.26 DTC: B1B4394, B1B4393

Diagnostic trouble code DTC definition

B1B4394 Right Front MIC Power Supply Shorted to Gnd
B1B4393 Right Front MIC Power Supply Open-circuited

1. Circuit diagram
Intelligent multimedia system 1-168 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

Front dome lamp

assembly

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the right front microphone (front dome lamp assembly) and ACU.

GAC Motor 2023

Electrics (I) 1-169 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the right front microphone (front dome
Right front microphone
ground
lamp assembly) harness connector BD96.
C Disconnect the ACU harness connector IP69.
D Measure the resistance of circuit between terminal 15 of
the right front microphone (front dome lamp assembly)
harness connector BD96 and terminal 19 of the ACU
harness connector IP69.
E Measure the resistance of circuit between terminal 16 of
the right front microphone (front dome lamp assembly)
Right front microphone signal harness connector BD96 and terminal 20 of the ACU
harness connector IP69.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Front dome lamp assembly harness connector

Right front microphone ground

No Repair or replace the harness.

Right front microphone

signal

Yes

Step 3 Check whether the circuit between the right front microphone (front dome lamp assembly) and ACU is
shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the right front microphone (front dome
Right front microphone
ground
lamp assembly) harness connector BD96.
C Disconnect the ACU harness connector IP69.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP69 and the body ground.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP69 and the body ground.
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
Right front microphone signal
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the right front microphone (front dome lamp assembly) and ACU is
shorted to power supply.
Intelligent multimedia system 1-170 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the right front microphone (front dome
Right front microphone
ground lamp assembly) harness connector BD96.
C Disconnect the ACU harness connector IP69.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 19 of
the ACU harness connector IP69 and the body ground.
F Measure the voltage of circuit between terminal 20 of
the ACU harness connector IP69 and the body ground.
Right front microphone signal
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 5 Replace the right front microphone (front dome lamp assembly).

A Replace the right front microphone (front dome lamp

assembly).
B Verify if the fault is eliminated after the right front
microphone (front dome lamp assembly) is replaced.
Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.
Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.27 DTC: B186044, B18DE96......

Diagnostic trouble code DTC definition

B186044 Falsh Module Error
B18DE96 Instrument Cluster Audible Alarm Module Error
B1B8199 Motherboard Temperature Low
B1B8198 Motherboard Temperature High
B1B4299 Gyro Temperature Low
B1B4298 Gyro Temperature High
1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-171 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power supply and ground circuits of the ACU.
Intelligent multimedia system 1-172 Electrics (I)

A Check whether the power supply and ground circuits

of the ACU are normal.

No Repair or replace the harness or

connector.

Yes

Step 3 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.2.5.28 DTC: B1BE412, B1BE411......

Diagnostic trouble code DTC definition

B1BE412 Left Front Horn 2 Circuit Shorted to Power Supply
B1BE411 Left Front Horn 2 Circuit Shorted to Ground
B1BE413 Left Front Horn 2 Circuit Open

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-173 Intelligent multimedia system

Instrument
panel PDU Left rear door woofer Right rear door woofer

Speaker + Speaker - Speaker + Speaker -

AV control unit (ACU)
Speaker + Speaker - Speaker + Speaker - Speaker + Speaker - Speaker + Speaker -

Left front door woofer Left front door tweeter Right front door woofer Right front door tweeter

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the left front door tweeter and the ACU.
Intelligent multimedia system 1-174 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Left front door tweeter +
B Disconnect the left front door tweeter harness
connector DD08.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 1
of the left front door tweeter harness connector DD08 and
terminal 5 of the ACU harness connector IP35.
E Measure the resistance of circuit between terminal 2
of the left front door tweeter harness connector DD08 and
Left front door tweeter - terminal 1 of the ACU harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left front door tweeter harness connector

Left front door tweeter +

No Repair or replace the harness.

Left front door tweeter -

Yes

Step 3 Check whether the circuit between the left front door tweeter and the ACU is shorted to ground.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
Left front door tweeter +
B Disconnect the left front door tweeter harness
connector DD08.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 1
of the ACU harness connector IP35 and the body ground.
E Measure the resistance of circuit between terminal 5
of the ACU harness connector IP35 and the body ground.
Left front door tweeter - Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the left front door tweeter and the ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-175 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
Left front door tweeter +
B Disconnect the left front door tweeter harness
connector DD08.
C Disconnect the ACU harness connector IP35.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the ACU harness connector IP35 and the body ground.

Left front door tweeter -

F Measure the voltage of circuit between terminal 5 of
the ACU harness connector IP35 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the left front door tweeter.

A Replace the left front door tweeter.

B Verify if the fault is eliminated after the left front door
tweeter is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.29 DTC: B1BE712, B1BE711......

Diagnostic trouble code DTC definition

B1BE712 Right Front Horn 2 Circuit Shorted to Power Supply
B1BE711 Right Front Horn 2 Circuit Shorted to Ground
B1BE713 Right Front Horn 2 Circuit Open

1. Circuit diagram
Intelligent multimedia system 1-176 Electrics (I)

Instrument
panel PDU Left rear door woofer Right rear door woofer

Speaker + Speaker - Speaker + Speaker -

AV control unit (ACU)
Speaker + Speaker - Speaker + Speaker - Speaker + Speaker - Speaker + Speaker -

Left front door woofer Left front door tweeter Right front door woofer Right front door tweeter

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the right front door tweeter and the ACU.

GAC Motor 2023

Electrics (I) 1-177 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Right front door tweeter
+ B Disconnect the right front door tweeter harness
connector PD08.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 1
of the right front door tweeter harness connector PD08 and
terminal 6 of the ACU harness connector IP35.
E Measure the resistance of circuit between terminal 2
of the right front door tweeter harness connector PD08 and
Right front door tweeter - terminal 2 of the ACU harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front door tweeter harness connector

Right front door tweeter

+

No Repair or replace the harness.

Right front door tweeter -

Yes

Step 3 Check whether the circuit between the right front door tweeter and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Right front door tweeter
+ B Disconnect the right front door tweeter harness
connector PD08.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 2
of the ACU harness connector IP35 and the body ground.
E Measure the resistance of circuit between terminal 6
of the ACU harness connector IP35 and the body ground.

Right front door tweeter - Standard resistance: 10kΩ or higher

F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the right front door tweeter and the ACU is shorted to power supply.
Intelligent multimedia system 1-178 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
Right front door tweeter
+ B Disconnect the right front door tweeter harness
connector PD08.
C Disconnect the ACU harness connector IP35.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 2 of
the ACU harness connector IP35 and the body ground.
Right front door tweeter - F Measure the voltage of circuit between terminal 6 of
the ACU harness connector IP35 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the right front door tweeter.

A Replace the right front door tweeter.

B Verify if the fault is eliminated after the right front
door tweeter is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.30 DTC: B1BF179

Diagnostic trouble code DTC definition

Connection Failure Displayed by External OMS Node
B1BF179
LVDS Video Stream

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-179 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

DSM ECU

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the DSM ECU and the ACU.
Intelligent multimedia system 1-180 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
DSM ECU signal shielded cable B Disconnect the DSM ECU harness connector BD20.
C Disconnect the ACU harness connector IP64.
D Measure the resistance of circuit between terminal 1
of the DSM ECU harness connector BD20 and terminal 2
of the ACU harness connector IP64.
E Measure the resistance of circuit between terminal 2
of the DSM ECU harness connector BD20 and terminal 6
of the ACU harness connector IP64.
DSM ECU video signal output
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

DSM ECU harness connector

Video signal shield GND

No Repair or replace the harness.

Video signal output

Yes

Step 3 Check whether the circuit between the DSM ECU and the ACU is shorted to ground.

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
DSM ECU signal shielded cable B Disconnect the DSM ECU harness connector BD20.
C Disconnect the ACU harness connector IP64.
D Measure the resistance of circuit between terminal 2
of the ACU harness connector IP64 and the body ground.
E Measure the resistance of circuit between terminal 6
of the ACU harness connector IP64 and the body ground.
Standard resistance: 10kΩ or higher
DSM ECU video signal output
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the DSM ECU and the ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-181 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
DSM ECU signal shielded cable B Disconnect the DSM ECU harness connector BD20.
C Disconnect the ACU harness connector IP64.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 2 of
the ACU harness connector IP64 and the body ground.
F Measure the voltage of circuit between terminal 6 of
DSM ECU video signal output the ACU harness connector IP64 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the DSM ECU.

A Replace the DSM ECU.

B Verify if the fault is eliminated after the DSM ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.31 DTC: B1BF279

Diagnostic trouble code DTC definition

Connection Failure Displayed by External FAPA Node
B1BF279
LVDS Video Stream

1. Circuit diagram
Intelligent multimedia system 1-182 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

FAPA ECU

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the FAPA ECU and the ACU.

GAC Motor 2023

Electrics (I) 1-183 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
AVP signal shielded cable B Disconnect the FAPA ECU harness connector BD69.
C Disconnect the ACU harness connector IP64.
D Measure the resistance of circuit between terminal 1
of the FAPA ECU harness connector BD69 and terminal 1
of the ACU harness connector IP64.
E Measure the resistance of circuit between terminal 2
of the FAPA ECU harness connector BD69 and terminal 5
of the ACU harness connector IP64.
AVP signal output
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

FAPA ECU harness connector

Video signal shielded cable

No Repair or replace the harness.

Video signal output

Yes

Step 3 Check whether the circuit between the FAPA ECU and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
AVP signal shielded cable B Disconnect the FAPA ECU harness connector BD69.
C Disconnect the ACU harness connector IP64.
D Measure the resistance of circuit between terminal 1
of the ACU harness connector IP64 and the body ground.
E Measure the resistance of circuit between terminal 5
of the ACU harness connector IP64 and the body ground.
Standard resistance: 10kΩ or higher
AVP signal output
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the FAPA ECU and the ACU is shorted to power supply.
Intelligent multimedia system 1-184 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
AVP signal shielded cable B Disconnect the FAPA ECU harness connector BD69.
C Disconnect the ACU harness connector IP64.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the ACU harness connector IP64 and the body ground.
F Measure the voltage of circuit between terminal 5 of
AVP signal output the ACU harness connector IP64 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the FAPA ECU.

A Replace the FAPA ECU .

B Verify if the fault is eliminated after the FAPA ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.32 DTC: B1BF279

Diagnostic trouble code DTC definition

Connection Failure Displayed by External FAPA Node
B1BF279
LVDS Video Stream

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-185 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

AVP ECU

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the AVP ECU and the ACU.
Intelligent multimedia system 1-186 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
AVP signal shielded cable B Disconnect the AVP ECU harness connector BD57.
C Disconnect the ACU harness connector IP64.
D Measure the resistance of circuit between terminal 1
of the AVP ECU harness connector BD57 and terminal 1
of the ACU harness connector IP64.
E Measure the resistance of circuit between terminal 2
of the AVP ECU harness connector BD57 and terminal 5
of the ACU harness connector IP64.
AVP signal output
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

AVP ECU harness connector

Video signal shielded cable

No Repair or replace the harness.

Video signal output

Yes

Step 3 Check whether the circuit between the AVP ECU and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
AVP signal shielded cable B Disconnect the AVP ECU harness connector BD57.
C Disconnect the ACU harness connector IP64.
D Measure the resistance of circuit between terminal 1
of the ACU harness connector IP64 and the body ground.
E Measure the resistance of circuit between terminal 5
of the ACU harness connector IP64 and the body ground.
Standard resistance: 10kΩ or higher
AVP signal output
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the AVP ECU and the ACU is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-187 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
AVP signal shielded cable B Disconnect the AVP ECU harness connector BD57.
C Disconnect the ACU harness connector IP64.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the ACU harness connector IP64 and the body ground.
F Measure the voltage of circuit between terminal 5 of
AVP signal output the ACU harness connector IP64 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the AVP ECU.

A Replace the AVP ECU.

B Verify if the fault is eliminated after the AVP ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.5.33 DTC: B1BF379

Diagnostic trouble code DTC definition

Connection Failure Displayed by External SVM Node
B1BF379
LVDS Video Stream

1. Circuit diagram
Intelligent multimedia system 1-188 Electrics (I)

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the SVM camera and the ACU.

GAC Motor 2023

Electrics (I) 1-189 Intelligent multimedia system

Check whether the circuit between the SVM camera and

the ACU is shorted or open.

Yes Repair or replace the harness.

No

Step 3 Replace the SVM camera.

A Replace the SVM camera.

B Verify if the fault is eliminated after the SVM camera
is replaced.

Yes The system is working normally.

No

Step 4 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.2.5.34 DTC: B1BF479

Diagnostic trouble code DTC definition

Connection Failure Displayed by External HUD Node
B1BF479
LVDS Video Stream

1. Circuit diagram
Intelligent multimedia system 1-190 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

HUD

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the HUD and the ACU.

GAC Motor 2023

Electrics (I) 1-191 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
HUD video signal shielded cable B Disconnect the HUD harness connector IP29.
C Disconnect the ACU harness connector IP49.
D Measure the resistance of circuit between terminal 1
of the HUD harness connector IP29 and terminal 2 of the
ACU harness connector IP49.
E Measure the resistance of circuit between terminal 2
of the HUD harness connector IP29 and terminal 6 of the
ACU harness connector IP49.
HUD video signal
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

HUD harness connector

HUD signal ground

No Repair or replace the harness.

HUD output signal

Yes

Step 3 Check whether the circuit between the HUD and the ACU is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
HUD video signal shielded cable B Disconnect the HUD harness connector IP29.
C Disconnect the ACU harness connector IP49.
D Measure the resistance of circuit between terminal 2
of the ACU harness connector IP49 and the body ground.
E Measure the resistance of circuit between terminal 6
of the ACU harness connector IP49 and the body ground.
Standard resistance: 10kΩ or higher
HUD video signal
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the circuit between the HUD and the ACU is shorted to power supply.
Intelligent multimedia system 1-192 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
HUD video signal shielded cable B Disconnect the HUD harness connector IP29.
C Disconnect the ACU harness connector IP49.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 2 of
the ACU harness connector IP49 and the body ground.
F Measure the voltage of circuit between terminal 6 of
HUD video signal the ACU harness connector IP49 and the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the HUD.

A Replace the HUD.

B Verify if the fault is eliminated after the HUD is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-193 Intelligent multimedia system
1.2.6 Diagnostic information and procedure (AV unit)
1.2.6.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of AV unit without removing any
part. Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.2.6.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. Then the same or similar conditions and environment when the user’s vehicle fails can be
simulated. No matter how experienced the maintenance personnel are and how skilled their technique is, if they do not
verify the symptoms before troubleshooting, they may ignore some critical concerns and give incorrect conjecture during
repair. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.2.6.3 ECU terminals
ACU harness connector (IP31)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / AM/FM antenna signal － －
AM/FM antenna signal shield
2 / － －
GND
Intelligent multimedia system 1-194 Electrics (I)
ACU harness connector (IP33)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / Video signal + － －
2 / Video signal shield GND － －

ACU harness connector (IP34)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.5/brown Left front seat headrest audio + － －
2 0.5/white Left front seat headrest audio + － －
3 0.5/white Left rear woofer + － －
4 0.5/pink Right rear woofer + － －
5 0.5/orange Left front seat headrest audio - － －
6 0.5/Gray Left front seat headrest audio - － －
7 0.5/Gray Left rear woofer - － －
8 0.5/green Right rear woofer - － －
11 1.0/red Battery power supply 1 － －
12 1.0/black Ground 1 － －

GAC Motor 2023

Electrics (I) 1-195 Intelligent multimedia system
ACU harness connector (IP35)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.5/yellow Left front tweeter + － －
2 0.5/pink Right front tweeter + － －
3 0.5/brown Left front woofer + － －
4 0.5/yellow Right front woofer + － －
5 0.5/orange Left front tweeter - － －
6 0.5/green Right front tweeter - — －
7 0.5/Purple Left front woofer - － －
8 0.5/orange Right front woofer - － －
9 0.35/black CCD ground － －
10 0.35/red IG1 power supply － －
0.5/ shielded
11 Microphone 1 signal shield GND － －
bare wire
12 0.35/Gray Microphone 1 signal — —
14 0.35/green ACC power supply － －
15 0.35/red CCD power supply － －
16 0.35/pink CCD video signal output － －
0.35/ shielded
17 CCD video signal shield GND － －
bare wire
AV display ACC power supply
18 0.35/pink － －
control
19 0.35/yellow BCAN-H — —
20 0.35/green BCAN-L － －
0.35/ shielded Steering wheel switch shield
23 － －
bare wire GND
Mode selection and Bluetooth
24 0.35/green － －
signal
25 0.35/blue Volume and FM control signal — —
Intelligent multimedia system 1-196 Electrics (I)
ACU harness connector (IP36)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / USB2 data + － －
2 / USB2 power supply － －
3 / USB2 shielded wire － －
4 / USB2 data - － －
5 / USB2 shielded wire － －

ACU harness connector (IP65)

ACU harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 / Front SVM camera video signal output － －
2 / Rear SVM camera video signal output － －
3 / Left SVM camera video signal output － －
4 / Right SVM camera video signal output － －
Front SVM camera video signal
5 / － －
shielded cable
Rear SVM camera video signal shielded
6 / － －
cable
Left SVM camera video signal shielded
7 / － －
cable
Right SVM camera video signal
8 / － －
shielded cable

GAC Motor 2023

Electrics (I) 1-197 Intelligent multimedia system
1.2.6.4 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

Camera Supply Voltage The power supply system of the Check whether the power supply harness of the
B27011C
Abnormal camera module is abnormal camera module is in good condition
1. Check whether the front camera harness is in
Front Camera Voltage good condition
B27101C The front camera is damaged
Abnormal
2. Replace the front camera
1. Check whether the rear camera harness is in
Rear Camera Voltage good condition
B27111C The rear camera is damaged
Abnormal
2. Replace the rear camera
1. Check whether the left camera harness is in
B27121C Left Camera Voltage Abnormal The left camera is damaged good condition
2. Replace the left camera
1. Check whether the right camera harness is in
Right Camera Voltage good condition
B27131C The right camera is damaged
Abnormal
2. Replace the right camera
1. Check whether the BCAN bus communication
is normal
U007388 CAN Node Offline The CAN bus is faulty
2. Switch off the power supply and restart the
vehicle network
1. The BCS module is 1. Check whether the BCS module harness is
damaged connected properly
U012987 BCS Signal Message Lost
2. The BCS communication 2. If it is connected properly, and the fault still
module is lost exists, replace the BCS module
1. Check whether the communication with BCS is
1. The BCS node bus normal. If not, replace it
communication is abnormal
BCS Signal Message Data 2. Check whether the communication with the
U048186 2. The BCS node bus
Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
1. Check whether the BCM harness is connected
1. BCM damage properly
U014087 BCM Signal Message Lost
2. The BCM is lost 2. If it is connected properly, and the fault still
exists, replace the BCM
1. Check whether the communication with BCM is
BCM Signal Message Data The BCM node bus normal. If not, replace it
U042286
Abnormal communication is abnormal
2. If the bus message is normal, replace the ACU
1. The steering control of the
1. Check whether the steering module harness of
steering wheel is damaged
the steering wheel is connected properly
U012687 SAS Signal Message Lost 2. The steering communication
2. If it is connected properly, and the fault still
module of the steering wheel is
exists, replace the steering control module
lost
1. Check whether the communication with the
1. The SAS node bus steering angle sensor is normal; if it does not work
communication is abnormal normally, replace it
SAS Signal Message Data
U042886 2. The SAS node bus 2. Check whether the communication with the
Abnormal
communication forwarded by GWM is normal; if the GWM does not work
GWM is abnormal normally, replace it
3. If the bus message is normal, replace the ACU
MCU-EMRALD The ECU has internal
B278187 Replace the ACU
Communication Fault communication fault
The circuit of the SVM control Check whether the SVM control switch harness is
B273011 System Switch Short-circuited
switch is abnormal in good condition
The circuit of the SVM control Check whether the SVM control switch harness is
B273092 System Switch Abnormal
switch is abnormal in good condition
1. The TCU node bus
communication is abnormal 1. Check the TCU connector
U010187 TCU Signal Message Lost 2. The TCU node bus 2. Check whether the communication with TCU is
communication forwarded by normal. If not, replace it
GWM is abnormal
Intelligent multimedia system 1-198 Electrics (I)

DTC DTC definition Possible causes Recommended action

3. Check the GWM connector
4. Check whether the communication with the
GWM is normal; if the GWM does not work
normally, replace it
1. Check whether the communication with TCU is
1. The TCU node bus normal. If not, replace it
communication is abnormal
TCU Signal Message Data 2. Check whether the communication with the
U040286 2. The TCU node bus
Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
1. Check the PAS connector
1. The PAS node bus 2. Check whether the communication with PAS is
communication is abnormal normal. If not, replace it
U015987 PAS_1 Signal Message Lost 2. The PAS node bus 3. Check the GWM connector
communication forwarded by 4. Check whether the communication with the
GWM is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check whether the communication with PAS is
1. The PAS node bus normal. If not, replace it
communication is abnormal
PAS_1 Signal Message Data 2. Check whether the communication with the
U045A81 2. The PAS node bus
Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
1. Check the SRS ECU connector.
1. The SRS node bus 2. Check whether the communication with SRS
communication is abnormal ECU is normal. If not, replace it
U015187 SRS Signal Message Lost 2. The SRS node bus 3. Check the GWM connector
communication forwarded by 4. Check whether the communication with the
GWM is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check whether the communication with SRS
1. The SRS node bus ECU is normal. If not, replace it
communication is abnormal
SRS Signal Message Data 2. Check whether the communication with the
U045281 2. The SRS node bus
Abnormal GWM is normal; if the GWM does not work
communication forwarded by normally, replace it
GWM is abnormal
3. If the bus message is normal, replace the ACU
The communication or storage
B276300 TF Card Fault of the TF card in the ACU is Replace the ACU
abnormal
The LVDS video output
B276400 LVDS Output Fault harness of the ACU is Check the LVDS video output harness of the ACU
abnormal
B271002 No Signal of Front Camera The front camera is damaged Replace the front camera
B271102 No Signal of Rear Camera The rear camera is damaged Replace the rear camera
B271202 No Signal of Left Camera The left camera is damaged Replace the left camera
B271302 No Signal of Right Camera The right camera is damaged Replace the right camera
1. Check whether the vehicle network
communication is normal
The unit is in a single-node
U007480 Limphome Activation Too Long 2. Check whether the connector of the unit node is
offline status
connected properly, and if not, it is recommended
to replace the unit node

GAC Motor 2023

Electrics (I) 1-199 Intelligent multimedia system

DTC DTC definition Possible causes Recommended action

1. Check the HVAC connector
Lost Communication with The communication with HVAC
U016487 2. Check whether the communication with the
HVAC node bus is abnormal
HVAC is normal; if not, replace it
1. Check the instrument cluster connector
The ICM node bus
U015587 Lost Communication with ICM 2. Check whether the communication with the
communication is abnormal
instrument cluster is normal; if not, replace it
1. Check the GWM connector
Lost Communication with The GWM node bus 2. Check whether the communication with the
U014687
GWM communication is abnormal GWM is normal; if the GWM does not work
normally, replace it
1. Check the GWM connector
1. The BCAN network is 2. Check whether the communication with the
U044781 Received GWM Signal Invalid overloaded GWM is normal; if the GWM does not work
2. The GWM signal is abnormal normally, replace it
3. If the bus message is normal, replace the ACU

1. The BCAN network is 1. Check the HVAC connector

Received HVAC Node Signal overloaded 2. Check whether the communication with the
U042481
Invalid 2. The HVAC signal is HVAC is normal; if not, replace it
abnormal 3. If the bus message is normal, replace the ACU
Check whether the 12V power supply voltage of
The 12V power supply voltage the vehicle is normal
B1B0016 Low Battery Voltage
of the vehicle is too high 1. If the voltage is normal, replace the ACU
2. If the voltage is too low, replace the battery
Check whether the 12V power supply voltage of
The 12V power supply voltage the vehicle is normal
B1B0017 High Battery Voltage
of the vehicle is too low 1. If the voltage is normal, replace the ACU
2. If the voltage is too high, replace the battery
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
faulty 1. If the voltage is abnormal, replace the radio
B1B4313 Radio Antenna Open
antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU
Check the output voltage of the radio antenna:
1. The ACU internal circuit is
Radio Antenna Failure - faulty 1. If the voltage is abnormal, replace the radio
B1B4011
Shorted to Gnd antenna
2. The radio antenna is faulty
2. If the voltage is normal, replace the ACU

1.2.6.5 DTC: B27101C, B271002

Diagnostic trouble code DTC definition

B27101C Front Camera Voltage Abnormal
B271002 No Signal of Front Camera

1. Circuit diagram
Intelligent multimedia system 1-200 Electrics (I)

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the front SVM camera and the ACU.

GAC Motor 2023

Electrics (I) 1-201 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Front SVM camera harness connector
position.
Front SVM camera video signal shield GND B Disconnect the front SVM camera harness connector
FB11.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the front SVM camera harness connector FB11 and
terminal 1 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the front SVM camera harness connector FB11 and
Front SVM camera video signal output
terminal 5 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Front SVM camera video signal shield GND

No Repair or replace the harness.

Front SVM camera video signal output

Yes

Step 3 Check whether the front SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Front SVM camera harness connector position.
B Disconnect the front SVM camera harness connector
Front SVM camera video signal shield GND
FB11.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the front SVM camera harness connector FB11 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the front SVM camera harness connector FB11 and the
body ground.
Standard resistance: 10kΩ or higher
Front SVM camera video signal output
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the font SVM camera circuit is shorted to power supply.
Intelligent multimedia system 1-202 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Front SVM camera harness connector
position.
Front SVM camera video signal shield GND B Disconnect the front SVM camera harness connector
FB11.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the front SVM camera harness connector FB11 and the
body ground.
Front SVM camera video signal output F Measure the voltage of circuit between terminal 2 of
the front SVM camera harness connector FB11 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the front SVM camera.

A Replace the front SVM camera.

B Verify if the fault is eliminated after the front SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.6.6 DTC: B27111C, B271102

Diagnostic trouble code DTC definition

B27111C Rear Camera Voltage Abnormal
B271102 No Signal of Rear Camera

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-203 Intelligent multimedia system

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the rear SVM camera and the ACU.
Intelligent multimedia system 1-204 Electrics (I)

Rear SVM camera harness connector A Set the ENGINE START/STOP button to ―OFF‖
position.
Rear SVM camera video signal shield GND B Disconnect the rear SVM camera harness connector
TK23.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the rear SVM camera harness connector TK23 and
terminal 2 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the rear SVM camera harness connector TK23 and
Rear SVM camera video signal output terminal 6 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Rear SVM camera video signal output

No Repair or replace the harness.

Rear SVM camera video signal shield GND

Yes

Step 3 Check whether the rear SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Rear SVM camera harness connector position.
B Disconnect the rear SVM camera harness connector
Rear SVM camera video signal shield GND
TK23.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the rear SVM camera harness connector TK23 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the rear SVM camera harness connector TK23 and the
body ground.
Standard resistance: 10kΩ or higher
Rear SVM camera video signal output
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the rear SVM camera circuit is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-205 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Rear SVM camera harness connector
position.
Rear SVM camera video signal shield GND B Disconnect the rear SVM camera harness connector
TK23.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the rear SVM camera harness connector TK23 and the
body ground.
Rear SVM camera video signal output F Measure the voltage of circuit between terminal 2 of
the rear SVM camera harness connector TK23 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the rear SVM camera.

A Replace the rear SVM camera.

B Verify if the fault is eliminated after the rear SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.6.7 DTC: B27121C, B271202

Diagnostic trouble code DTC definition

B27121C Left Camera Voltage Abnormal
B271202 No Signal of Left Camera

1. Circuit diagram
Intelligent multimedia system 1-206 Electrics (I)

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the left SVM camera and the ACU.

GAC Motor 2023

Electrics (I) 1-207 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Left SVM camera harness connector
position.
Left SVM camera video signal shield GND
B Disconnect the left SVM camera harness connector
DD13.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the left SVM camera harness connector DD13 and
terminal 3 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the left SVM camera harness connector DD13 and
terminal 7 of the ACU harness connector IP65.
Standard resistance: less than 1Ω
Left SVM camera video signal
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Left SVM camera video signal shield GND

No Repair or replace the harness.

Left SVM camera video signal

Yes

Step 3 Check whether the left SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Left SVM camera harness connector position.
B Disconnect the left SVM camera harness connector
Left SVM camera video signal shield GND
DD13.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the left SVM camera harness connector DD13 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the left SVM camera harness connector DD13 and the
body ground.
Standard resistance: 10kΩ or higher
Left SVM camera video signal
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the left SVM camera circuit is shorted to power supply.
Intelligent multimedia system 1-208 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Left SVM camera harness connector
position.
Left SVM camera video signal shield GND B Disconnect the left SVM camera harness connector
DD13.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the left SVM camera harness connector DD13 and the
body ground.
Left SVM camera video signal F Measure the voltage of circuit between terminal 2 of
the left SVM camera harness connector DD13 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the left SVM camera.

A Replace the left SVM camera.

B Verify if the fault is eliminated after the left SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.6.8 DTC: B27131C, B271302

Diagnostic trouble code DTC definition

B27131C Right Camera Voltage Abnormal
B271302 No Signal of Right Camera

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-209 Intelligent multimedia system

Instrument
panel PDU Front SVM
camera

AV control unit (ACU)

Left SVM camera Rear SVM camera Right SVM camera

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the right SVM camera and the ACU.
Intelligent multimedia system 1-210 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Right SVM camera harness connector position.

Right SVM camera video signal shield GND B Disconnect the right SVM camera harness connector
PD13.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the right SVM camera harness connector PD13 and
terminal 4 of the ACU harness connector IP65.
E Measure the resistance of circuit between terminal 2
of the right SVM camera harness connector PD13 and
terminal 8 of the ACU harness connector IP65.
Right SVM camera video signal
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

Right SVM camera video signal shield GND

No Repair or replace the harness.

Right SVM camera video signal

Yes

Step 3 Check whether the right SVM camera circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

Right SVM camera harness connector position.
B Disconnect the right SVM camera harness connector
Right SVM camera video signal shield GND PD13.
C Disconnect the ACU harness connector IP65.
D Measure the resistance of circuit between terminal 1
of the right SVM camera harness connector PD13 and the
body ground.
E Measure the resistance of circuit between terminal 2
of the right SVM camera harness connector PD13 and the
body ground.
Standard resistance: 10kΩ or higher
Right SVM camera video signal
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the right SVM camera circuit is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-211 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

Right SVM camera harness connector position.

Right SVM camera video signal shield GND B Disconnect the right SVM camera harness connector
PD13.
C Disconnect the ACU harness connector IP65.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of
the right SVM camera harness connector PD13 and the
body ground.
Right SVM camera video signal F Measure the voltage of circuit between terminal 2 of
the right SVM camera harness connector PD13 and the
body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the right SVM camera.

A Replace the right SVM camera.

B Verify if the fault is eliminated after the right SVM
camera is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.6.9 DTC: U007388, U007480

Diagnostic trouble code DTC definition

U007388 CAN Node Offline
U007480 Limphome Activation Too Long

1. Circuit diagram
Intelligent multimedia system 1-212 Electrics (I)

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

GAC Motor 2023

Electrics (I) 1-213 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Measure the resistance of circuit between terminal 19
and terminal 20 of the ACU harness connector IP35.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of the ACU.

A Check whether the power and ground wires of the

ACU are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.2.6.10 DTC: U012987, U048186

Diagnostic trouble code DTC definition

U012987 BCS Signal Message Lost
U048186 BCS Signal Message Data Abnormal

1. Circuit diagram
Intelligent multimedia system 1-214 Electrics (I)

Instrument
panel PDU

AV control unit (ACU) ESPI

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ESPI and the GWM.

GAC Motor 2023

Electrics (I) 1-215 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

GWM harness connector position.
B Disconnect the ESPI harness connector FB04.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 7
of the ESPI harness connector FB04 and terminal 9 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 21
of the ESPI harness connector FB04 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ESPI harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.
Intelligent multimedia system 1-216 Electrics (I)

GWM harness connector

Yes

Step 4 Check the power and ground wires of ESPI.

A Check whether the power and ground wires of the

ESPI are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the ESPI.

A Replace the ESPI.

B Verify if the fault is eliminated after the ESPI is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-217 Intelligent multimedia system
1.2.6.11 DTC: U014087, U042286

Diagnostic trouble code DTC definition

U014087 BCM Signal Lost
U042286 Invalid Frame Data Received from BCM
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Integrated BCM

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
Intelligent multimedia system 1-218 Electrics (I)

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the BCM and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the BCM harness connector IP01.
D Measure the resistance of circuit between terminal 19 of
the ACU harness connector IP35 and terminal 42 of the
BCM harness connector IP01.
E Measure the resistance of the circuit between
terminal 20 of the ACU harness connector IP35 and
terminal 41 of the BCM harness connector IP01.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the BCM.

A Check whether the power and ground wires of the

BCM are normal.
No Repair or replace the harness.

Yes

Step 4 Replace the BCM.

A Replace the BCM.

B Verify if the fault is eliminated after the BCM is
replaced.

GAC Motor 2023

Electrics (I) 1-219 Intelligent multimedia system

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.6.12 DTC: U012687, U042886

Diagnostic trouble code DTC definition

U012687 SAS Signal Message Lost
U042886 SAS Signal Message Data Abnormal

1. Circuit diagram
Intelligent multimedia system 1-220 Electrics (I)

Instrument
panel PDU

AV control unit (ACU) EPS ECU

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the EPS ECU and the GWM.

GAC Motor 2023

Electrics (I) 1-221 Intelligent multimedia system

GWM harness connector A Set the ENGINE START/STOP button to ―OFF‖

position.
B Disconnect the EPS ECU harness connector IP17.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 7 of
the EPS ECU harness connector IP17 and terminal 9 of
the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 6 of
the EPS ECU harness connector IP17 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

EPS ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
No Check the CAN data communication cable
for possible short circuit, open circuit and
false connection, or replace the harness.
Intelligent multimedia system 1-222 Electrics (I)

GWM harness connector

Yes

Step 4 Check the power and ground wires of the EPS ECU.

A Check whether the power and ground wires of the

EPS ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the EPS ECU.

A Replace the EPS ECU.

B Verify if the fault is eliminated after the EPS ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-223 Intelligent multimedia system
1.2.6.13 DTC: B278187, B273011

Diagnostic trouble code DTC definition

B278187 MCU-EMRALD Communication Fault
B273011 System Switch Short-circuited
B273092 System Switch Abnormal
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
Intelligent multimedia system 1-224 Electrics (I)

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground wires of the ACU.

A Check whether the power and ground wires of the

ACU are normal.

No Repair or replace the harness.

Yes

Step 3 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.2.6.14 DTC: U010187, U040286

Diagnostic trouble code DTC definition

U010187 TCU Signal Message Lost
U040286 TCU Signal Message Data Abnormal

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-225 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU) 7WDCT TCU

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the 7WDCT TCU and the GWM.
Intelligent multimedia system 1-226 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

GWM harness connector
position.
B Disconnect the 7WDCT TCU harness connector
EN55.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the 7WDCT TCU harness connector EN55 and terminal
14 of the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the 7WDCT TCU harness connector EN55 and terminal
34 of the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

7WDCT TCU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
No Check the CAN data communication cable
for possible short circuit, open circuit and
false connection, or replace the harness.

GAC Motor 2023

Electrics (I) 1-227 Intelligent multimedia system

GWM harness connector

Yes

Step 4 Check the power and ground wires of the 7WDCT TCU.

A Check whether the power and ground wires of

7WDCT TCU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the 7WDCT TCU.

A Replace the 7WDCT TCU.

B Verify if the fault is eliminated after the 7WDCT TCU
is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.
Intelligent multimedia system 1-228 Electrics (I)

1.2.6.15 DTC: U015987, U045A81

Diagnostic trouble code DTC definition

U015987 PAS_1 Signal Message Lost
U045A81 PAS_1 Signal Message Data Abnormal
1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU) RPA ECU

GWM

2. Diagnostic procedure
Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

GAC Motor 2023

Electrics (I) 1-229 Intelligent multimedia system

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the RPA ECU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

GWM harness connector
position.
B Disconnect the RPA ECU harness connector BD03.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 5 of
the RPA ECU harness connector BD03 and terminal 9 of
the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 4 of
the RPA ECU harness connector BD03 and terminal 29 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

RPA ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.
Intelligent multimedia system 1-230 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of the RPA ECU.

A Check if the power and ground wires of the RPA

ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the RPA ECU.

A Replace the RPA ECU.

B Verify if the fault is eliminated after the RPA ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-231 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.6.16 DTC: U015187, U045281

Diagnostic trouble code DTC definition

U015187 SRS Signal Message Lost
U045281 SRS Signal Message Data Abnormal

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU) SRS ECU

GWM

2. Diagnostic procedure
Intelligent multimedia system 1-232 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the SRS ECU and the GWM.

A Set the ENGINE START/STOP button to ―OFF‖

SRS ECU harness connector
position.
B Disconnect the SRS ECU harness connector BD05.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 12 of
the SRS ECU harness connector BD05 and terminal 14 of
the GWM harness connector IP19.
E Measure the resistance of circuit between terminal 11 of
the SRS ECU harness connector BD05 and terminal 34 of
the GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the ACU and the GWM.

GAC Motor 2023

Electrics (I) 1-233 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of SRS ECU.

A Check whether the power and ground wires of the

SRS ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the SRS ECU.

A Replace the SRS ECU.

B Verify if the fault is eliminated after the SRS ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

Intelligent multimedia system 1-234 Electrics (I)

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.2.6.17 DTC: U016487, U042481

Diagnostic trouble code DTC definition

U016487 Lost Communication with HVAC
U042481 Received HVAC Node Signal Invalid

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

HVAC control unit

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-235 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the HVAC control unit and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the HVAC control unit harness connector
IP27.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 4 of the
HVAC control unit harness connector IP27.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 5 of the
HVAC control unit harness connector IP27.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

HVAC control unit harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the HVAC control unit.

A Check whether the power and ground wires of the

HVAC control unit are normal.
Intelligent multimedia system 1-236 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the HVAC control unit.

A Replace the HVAC control unit.

B Verify if the fault is eliminated after the HVAC control unit
is replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.6.18 DTC: U014687, U044781

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM
U044781 Received GWM Signal Invalid

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-237 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the GWM and the ACU.
Intelligent multimedia system 1-238 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP35.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the GWM.

A Check whether the power and ground wires of GWM

are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

GAC Motor 2023

Electrics (I) 1-239 Intelligent multimedia system

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.6.19 DTC: B1B0016, B1B0017......

Diagnostic trouble code DTC definition

B1B0016 Low Battery Voltage
B1B0017 High Battery Voltage
B27011C Camera Supply Voltage Abnormal

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Refer to B-CAN
system circuit diagram

2. Diagnostic procedure
Intelligent multimedia system 1-240 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the battery.

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.
No Charge the battery or check the charging
system.
Yes

Step 3 Check the ACU fuses IF03, IF08 and IF26.

A Check whether the fuses IF03, IF08 and IF26 are

blown.
No Go to step 5.

Yes

Step 4 Check and repair the circuits of fuses IF08, IF03 and IF26.

A Check whether the circuits of fuses IF08, IF03 and

IF26 are shorted.
B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuses IF08, IF26 and IF203 are rated at 20A, 7.5A and
7.5A respectively.
D Verify if the ACU works normally.
Yes The system is working normally.

No

Step 5 Check the power supply circuit of the ACU.

GAC Motor 2023

Electrics (I) 1-241 Intelligent multimedia system

ACU harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
IG1 power supply
B Disconnect the ACU harness connectors IP35 and
IP34.
C Set the ENGINE START/STOP button to ―ON‖
position.
D Measure the voltage of circuit between terminals 10
and 14 of the ACU harness connector IP35 and the body
ground.
E Measure the voltage of circuit between terminal 11 of
the ACU harness connector IP34 and the body ground.
ACC power supply
Standard voltage: 11~14V
F Verify if the voltage is consistent with the standard value.

ACU harness connector

No Repair or replace the harness.

Battery power supply

Yes

Step 6 Check the ACU ground circuit.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
B Disconnect the ACU harness connector IP34.
C Measure the resistance of circuit between terminal 12
of the ACU harness connector IP34 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GND

Yes

Step 7 Replace the ACU.

Intelligent multimedia system 1-242 Electrics (I)

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.2.6.20 DTC: U015587

Diagnostic trouble code DTC definition

U015587 Lost Communication with ICM

1. Circuit diagram

Instrument
panel PDU

AV control unit (ACU)

Instrument cluster

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-243 Intelligent multimedia system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the instrument cluster and the ACU.

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector position.
B Disconnect the ACU harness connector IP35.
C Disconnect the ICM harness connector IP06.
D Measure the resistance of circuit between terminal 19
of the ACU harness connector IP35 and terminal 2 of the
ICM harness connector IP06.
E Measure the resistance of circuit between terminal 20
of the ACU harness connector IP35 and terminal 1 of the
ICM harness connector IP06.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Instrument cluster harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of instrument cluster.

A Check if the power and ground wires of ICM are

normal.
Intelligent multimedia system 1-244 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

No

Step 5 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.2.6.21 DTC: B1B4313, B1B4011

Diagnostic trouble code DTC definition

B1B4313 Radio Antenna Open
B1B4011 Radio Antenna Failure - Shorted to Gnd

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-245 Intelligent multimedia system

Instrument
panel PDU

AV control unit (ACU)

AM/FM antenna

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to ―ON‖
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the circuit between the AM/FM antenna and the ACU.
Intelligent multimedia system 1-246 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

ACU harness connector
position.
AM/FM antenna signal shield GND B Disconnect the AM/FM antenna harness connector
TK24.
C Disconnect the ACU harness connector IP31.
D Measure the resistance of the circuit between
terminal 1 of the AM/FM antenna harness connector TK24
and terminal 1 of the ACU harness connector IP31.
E Measure the resistance of the circuit between
terminal 2 of the AM/FM antenna harness connector TK24
and terminal 2 of the ACU harness connector IP31.
AM/FM antenna signal
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

AM/FM antenna harness connector

AM/FM antenna ground

No Repair or replace the harness.

AM/FM antenna signal

Yes

Step 3 Check whether the AM/FM antenna circuit is shorted to ground.

A Set the ENGINE START/STOP button to ―OFF‖

AM/FM antenna harness connector position.
B Disconnect the AM/FM antenna harness connector
AM/FM antenna ground TK24.
C Disconnect the ACU harness connector IP31.
D Measure the resistance of circuit between terminal 1 of
the AM/FM antenna harness connector TK24 and the body
ground.
E Measure the resistance of circuit between terminal 2 of
the AM/FM antenna harness connector TK24 and the body
ground.
Standard resistance: 10kΩ or higher
AM/FM antenna signal F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the AM/FM antenna circuit is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-247 Intelligent multimedia system

A Set the ENGINE START/STOP button to ―OFF‖

AM/FM antenna harness connector
position.

AM/FM antenna ground B Disconnect the AM/FM antenna harness connector

TK24.
C Disconnect the ACU harness connector IP31.
D Set the ENGINE START/STOP button to ―ON‖
position.
E Measure the voltage of circuit between terminal 1 of the
AM/FM antenna harness connector TK24 and the body
ground.

AM/FM antenna signal

F Measure the voltage of circuit between terminal 2 of the
AM/FM antenna harness connector TK24 and the body
ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 5 Replace the AM/FM antenna.

A Replace the AM/FM antenna.

B Verify if the fault is eliminated after the AM/FM
antenna is replaced.

Yes The system is working normally.

No

Step 6 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.
Intelligent multimedia system 1-248 Electrics (I)

1.2.7 Removal and installation

1.2.7.1 Removing and installing AVNT unit
Removal procedure
Note:
Depending on vehicle configurations, there are different
AV/navigation unit, but the removal and installation
procedures are basically the same. Here only the removal
and installation methods of the AVNT are described.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the console body assembly. Refer to
Maintenance Manual - Body, HVAC

4 Remove the AVNT

a. Unscrew the fixing screw as arrowed, and remove the
AVNT ①.

b. Disconnect the connectors (arrow A, arrow B, arrow C,

arrow D, arrow E, arrow F, arrow G, arrow H, arrow I and
arrow J), and remove the AVNT ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, check the function of AVNT. Refer to
Diagnostic scan tool
– After replacing with a new AVNT, go through the
―Replacement routine‖ operation of AVNT with the
diagnostic scan tool.

GAC Motor 2023

Electrics (I) 1-249 Intelligent multimedia system

1.2.7.2 Removing and installing touch screen

Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)

3 Remove the touch screen

a. Undo the fixing clips (arrows A and B), and remove the
screw cover ①.
Intelligent multimedia system 1-250 Electrics (I)

b. Unscrew the fixing screws (arrow A) on the back of the

touch screen.
c. Undo the fixing clips (arrow B) and remove the touch
screen ①.

d. Disconnect the connectors (arrows A and B), and take

out the touch screen ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the touch
screen.

GAC Motor 2023

Electrics (I) 1-251 Intelligent multimedia system

1.2.7.3 Removing and installing front door woofer

assembly
Removal procedure
Note:
This section describes the removal and installation of left
front door woofer assembly, and the right front door woofer
assembly may be removed and installed by reference to
left one.
1 Remove the front door trim panel assembly. Refer to
Maintenance Manual - Body, HVAC

2 Remove the front door woofer assembly

a. Unscrew the fixing screws as arrowed, and remove the
front door woofer assembly ①.

b. Disconnect the connector as arrowed, and take out

the front door woofer assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the front
door woofer assembly.
Intelligent multimedia system 1-252 Electrics (I)

1.2.7.4 Removing and installing rear door woofer

assembly
Removal procedure
Note:
This section describes the removal and installation of left
rear door woofer assembly, and the right rear door woofer
assembly may be removed and installed by reference to
left one.
1 Remove the rear door trim panel assembly. Refer to
Maintenance Manual - Body, HVAC

2 Remove the rear door woofer assembly

a. Unscrew the fixing screws as arrowed, and remove the
rear door woofer assembly ①.

b. Disconnect the connector as arrowed, and take out

the rear door woofer assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the rear
door woofer assembly.

GAC Motor 2023

Electrics (I) 1-253 Intelligent multimedia system

1.2.7.5 Removing and installing squawker assembly

(headrest)
Removal procedure
Note:
This section describes the removal and installation of the
right squawker assembly, and the left squawker assembly
may be removed and installed by reference to right one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the front seat assembly. Please refer to
Service Manual - Body, A/C.
4 Remove the front seat back cover assembly. Refer to
Maintenance Manual - Body, HVAC

5 Remove the squawker assembly

a. Undo the harness fixing clip of the squawker assembly
as arrowed.
Intelligent multimedia system 1-254 Electrics (I)

b. Unscrew the fixing screws as arrowed, and remove the

squawker assembly ①.

c. Disconnect the connector as arrowed, and remove the

squawker assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure.

GAC Motor 2023

Electrics (I) 1-255 Intelligent multimedia system

1.2.7.6 Removing and installing radio antenna

amplifier
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the liftgate upper trim panel assembly. Refer to
Maintenance Manual - Body, HVAC

4 Remove the radio antenna amplifier.

a. Disconnect the connectors (arrows A and B) of the radio
antenna amplifier.
b. Unscrew the fixing bolt (arrow C), and remove the radio
antenna amplifier ①.

Installation procedure
The installation procedure is in reverse of removal
procedure.
Intelligent multimedia system 1-256 Electrics (I)

1.2.7.7 Removing and installing front door tweeter

assembly
Removal procedure
Note:
This section describes the removal and installation of left
front door tweeter assembly, and the right front door
tweeter assembly may be removed and installed by
reference to left one.
1 Remove the front door trim panel assembly. Refer to
Maintenance Manual - Body, HVAC

2 Remove the front door tweeter assembly

a. Undo the fixing clip as arrowed, and remove the front
door tweeter assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the tweeter
assembly.
1.2.7.8 Removing and installing AR camera
Removal procedure
Note:
The AR camera may be removed and installed by
reference to the removal and installation of the left/right
trim cover of the interior rearview mirror.
1 Remove the left/right trim cover of the interior
rearview mirror. Refer to1.6.6.6 Removing and
installing interior rearview mirror left/ right trim covers

GAC Motor 2023

Electrics (I) 1-257 Intelligent multimedia system

1.2.7.9 Removing and installing rear door tweeter

assembly
Removal procedure
Note:
This section describes the removal and installation of left
rear door tweeter assembly, and the right rear door tweeter
assembly may be removed and installed by reference to
left one.
1 Remove the rear door trim panel assembly. Refer to
Maintenance Manual - Body, HVAC

2 Remove the rear door tweeter assembly

a. Undo the fixing clip as arrowed, and remove the rear
door tweeter assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the rear
door tweeter assembly.
Intelligent multimedia system 1-258 Electrics (I)

1.2.7.10 Removing and installing squawker assembly

(instrument panel side)
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the squawker assembly
a. Undo the fixing clips (arrows A and B), and remove the
speaker mask assembly ①.

b. Unscrew the fixing screws as arrowed, and remove the

squawker assembly ①.

c. Disconnect the connector as arrowed, and take out the

squawker assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, perform the function test of the
squawker assembly.

GAC Motor 2023

Electrics (I) 1-259 Intelligent multimedia system

1.2.7.11 Removing and installing subwoofer assembly

Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the trunk carpet assembly. Refer to
Maintenance Manual - Body, HVAC

4 Remove the subwoofer assembly

a. Disconnect the connector of subwoofer assembly (arrow
A).
b. Unscrew the fixing nuts (arrow B), and remove the
subwoofer assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether the operation of the
subwoofer assembly is normal.
Intelligent multimedia system 1-260 Electrics (I)

1.2.7.12 Removing and installing power amplifier

assembly
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the trunk carpet assembly. Refer to
Maintenance Manual - Body, HVAC

4 Remove the power amplifier assembly

a. Disconnect the power amplifier assembly connectors
(arrows A, B, C and D).
b. Undo the harness fixing clip (arrow E).

c. Unscrew the fixing nuts as arrowed, and remove the

power amplifier assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether the operation of the
power amplifier assembly is normal.

GAC Motor 2023

Electrics (I) 1-261 Intelligent ambient light system
1.3 Intelligent ambient light system
1.3.1 System description
1.3.1.1 System description
The intelligent ambient light control system can adjust the ambient lights in different colors and distribution states
according to different ACU settings.
The main ECU of the intelligent ambient light control system is an integrated BCM connected to the body bus BCAN. The
system also includes 9 distributed ambient lights, which are connected to the IAL through the LIN bus as slave control
units connected in series in the LIN bus network.
Ambient light adjustment method
The ambient light can be adjusted by clicking on the 3D vehicle model in the main interface of AV system or the ―My Car‖
in the application menu to enter the My Car interface, and then selecting ―Light Effect→Ambient Light‖:
a. Ambient function switch: Click the interior ambient light switch to turn on or off the ambient light function. When the
ambient light function is turned off, other parameters cannot be adjusted ; when the ambient light function is turned
on and the ENGINE START/STOP button is set to "ON" position, the ambient light is always on.
b. Ambient light brightness adjustment: Users can adjust the brightness of ambient light by clicking or sliding the
ambient light brightness progress bar among 8 levels as desired.
c. Drive mode following switch: When the drive mode following function is activated, the color of the ambient light will
change along with the drive mode. That is to say, when the user changes the drive mode, the ambient light color
will change accordingly.
d. Music rhythm mode: If the music rhythm mode is activated, the ambient light brightness will change along with the
music rhythm when the music is played.
e. Ambient light color: Users can select the ambient light color by dragging or clicking on the color bar.
Intelligent ambient light system 1-262 Electrics (I)

1.3.2 Location of components

1.3.2.1 Location of components

Map pocket ambient light

Console mobile phone storage

box atmosphere lamp

GAC Motor 2023

Electrics (I) 1-263 Intelligent ambient light system

1.3.3 Electrical schematic diagram

1.3.3.1 Electrical schematic diagram

Left front door interior trim

panel ambient light 9

Console ambient light 8

Console ambient light 7

Console ambient light 6

Integrated BCM

To BCAN system
Right front door interior
trim panel ambient light 3

Instrument panel ambient

light 2

Instrument panel ambient

light 1

Instrument panel switch

block - right

Instrument panel switch

block - left
Intelligent ambient light system 1-264 Electrics (I)

1.3.4 Removal and installation

1.3.4.1 Removing and installing map pocket ambient
light
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the upper trim panel assembly of the
console. Refer to Maintenance Manual - Body, HVAC

4. Remove the map pocket ambient light

a. Disconnect the connectors (arrow A) of the map
pocket ambient light, and undo the fixing clip.
b. Detach the fixing clips (arrow B), and remove the map
pocket ambient light ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, check whether the operation of the
ambient light is normal.

GAC Motor 2023

Electrics (I) 1-265 Intelligent ambient light system

1.3.4.2 Removing and installing console mobile phone

storage box ambient light
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the upper trim panel assembly of the
console. Refer to Maintenance Manual - Body, HVAC

4. Remove the console mobile phone storage box ambient

lamp
a. Detach the harness and the front storage box assembly
(arrow A).
b. Undo the fixing clips (arrow B), and remove the console
mobile phone storage box ambient light ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, check whether the operation of the
ambient light is normal.
External lighting system 1-266 Electrics (I)

1.4 External lighting system

1.4.1 Specifications
1.4.1.1 Fastener specifications

Location Specification Tightening torque:Nm

Left rear combination lamp A
Hexagon flange nut M6 5±1
Right rear combination lamp A
Left rear combination lamp A Hexagon head bolt and large washer
5±1
Right rear combination lamp A assembly M6×16

Left front combination lamp Hexagon head bolt and plain washer
6±1
Right front combination lamp assembly M6×30

Left front combination lamp Hexagon head bolt and extra large
6±1
Right front combination lamp washer assembly M6×45

GAC Motor 2023

Electrics (I) 1-267 External lighting system

1.4.2 System description

1.4.2.1 System description
The external lighting system of this model includes lamps with various functions that meet the requirements of relevant
laws and regulations, as well as humanized functions such as Follow Me Home, Car Locating Lighting, Auto Lane
Change, Headlamp Leveling, DRL, and HMA. The driver can perform corresponding operations on all lamps through
related switches, intelligent remote control keys or lamp switches.
The external lighting system mainly includes:
– Position lamp
– Low beam
– High beam, overtaking lamp
– Turn signal lamp, hazard warning lamp
– Automatic headlamp on/off
– Rear fog lamp
– Daytime running lamp
– Brake lamp
– Reverse lamp
– License plate lamp
1.4.2.2 System control logic

Load type Function Function logic

With engine start/stop button in ―ON‖ position, the low
Manual turning on and off
beam is turned on and off by the switch.
For the vehicle models with RLS, with engine start/stop
Automatic turning on and off with button in ―ON‖ position, and lamplight combination
RLS switch in ―AUTO‖ position, the headlamp is
automatically turned on and off by the sensor.
After power-off with engine start/stop button in ―OFF‖
position, quickly operate the lamplight combination
Low beam
switch as follows to activate the Follow Me Home
function: OFF→Position lamp/AUTO→OFF.
If the four doors remain closed after the Follow Me
Follow me home
Home function is activated, the low beam stays on for
30s and then goes out.
If any of the four doors is opened after the Follow Me
Home function is activated, the low beam stays on for
External 80s and then goes out.
lighting
With engine start/stop button in ―ON‖ position, the high
Manual turning on and off
beam is turned on and off by the switch.
For the vehicle models with RLS, with engine start/stop
Automatic turning on and off with button in ―ON‖ position, and lamplight combination
RLS switch in ―AUTO‖ position, the headlamp is
High beam
automatically turned on and off by the sensor.
For the vehicle models with RLS (HMA), with ENGINE
Automatic turning on and off with START/STOP button in ―ON‖ position and lamplight
HMA switch in ―AUTO‖ position, the high beam is
automatically turned on and off by the sensor.
Manual turning on and off The low beam is turned on and off by the switch.
For the vehicle models with RLS, with engine start/stop
Position lamp Automatic turning on and off with button in ―ON‖ position, and lamplight combination
RLS switch in ―AUTO‖ position, the headlamp is
automatically turned on and off by the sensor.
External lighting system 1-268 Electrics (I)

Going out when turn signal When the turn signal lamp on a certain side is turned
lamps are on on, the front position lamp on that side will go out.
With the position lamp switch turned on, the position
lamp output will be automatically turned off when the
vehicle is armed.
Turning off for power saving
With the position lamp switch turned on, the position
lamp output will be turned off 15 min after the power-off
when the vehicle is disarmed.
When the remote unlocking, proximity unlocking, and
Turning on in proximity passive unlocking functions are activated, the position
lamp will stay on for 25 s automatically.
Turning on during vehicle When the car searching function is activated, the
locating position lamp will stay on for 8 s automatically.
With engine start/stop button in ―ON‖ position, the rear
Rear fog lamp Manual turning on and off
fog lamp is turned on and off by the switch.
The brake lamp is turned on when the brake pedal is
Manual turning on and off
depressed.
Automatic turning on and off with BCM receives the brake signal from EPB to turn on the
Brake lamp
EPB brake lamp.
Automatic turning on and off with BCM receives the brake signal from BCS to turn on the
BCS brake lamp.
The reverse lamp is turned on when the reverse gear is
Reverse lamp Manual turning on and off
engaged.
With the clearance lamp off, the daytime running lamp
Manual turning on and off
is turned on when the engine is running.
Daytime running lamp When the turn signal lamp on a certain side is turned
Going out when turn signal
on, the daytime running lamp on that side will go out
lamps are on
and the position lamp will come on instead.
With engine start/stop button in ―ON‖ position, the turn
Manual turning on and off
signal lamp is turned on and off manually.
When the turn signal lamp switch on certain side is
Turn signal lamp Flashing during lane change turned on briefly and then turned off, the turn signal
lamp will flash 3 times and then go out.
Flashing at doubled frequency in When a turn signal lamp fault is detected, after turned
case of failure on, the turn signal lamp will flash at doubled frequency.
Hazard warning lamps are turned on and off by the
Manual turning on and off
switch.
Flashing hazard warning lamps After receiving the collision event message from the
in case of collision SRS ECU, the BCM flashes the hazard warning lamp.
After receiving the emergency braking event message
Flashing hazard warning lamps
from the BCS, the BCM flashes the hazard warning
in case of emergency braking
lamp.
Flashing hazard warning lamps In the case of successful remote locking, the hazard
Hazard warning lamp in case of locking warning lamp flashes once.
Flashing hazard warning lamps In the case of successful remote unlocking, the hazard
in case of unlocking warning lamp flashes twice.
Flashing hazard warning lamps When the whole vehicle is armed, the hazard warning
in case of activation of body anti- lamps will flash if the body anti-theft function is
theft function activated due to opening of any door.
After the Panic alarm request is received from the
Flashing in case of Panic alarm remote control key, the hazard warning lamp flashes to
given an alarm.

GAC Motor 2023

Electrics (I) 1-269 External lighting system

After the SATO request is received, the hazard warning

Flashing in case of SATO
lamp flashes.
Flashing hazard warning lamps After the PLG action prompt request is received, the
in case of PLG action prompt hazard warning lamp flashes.
External lighting system 1-270 Electrics (I)

1.4.3 Location of components

1.4.3.1 Location of components 1

Right front combination lamp

Left front
combination lamp

Left rear combination lamp A

assembly

License plate lamp

Right rear combination lamp A

Left retro-reflector assembly

Rear fog lamp

Reverse lamp

Right retro-reflector

GAC Motor 2023

Electrics (I) 1-271 External lighting system

1.4.3.2 Location of components 2

Instrument panel switch block - left

Left instrument panel switch Combination switch and clock spring

block assembly assembly

Instrument panel switch

block

Hazard warning lamp Instrument panel switch

switch block - right
External lighting system 1-272 Electrics (I)

1.4.4 Electrical schematic diagram

1.4.4.1 Electrical schematic diagram

Left adjustment
motor
Battery power supply ALS switch

Right adjustment
motor

High beam

Position lamp switch

Low beam
Rear fog lamp switch

Turn signal lamp switch

Lamplight
combination switch HMA switch Turn signal lamp

Low beam switch

High beam switch

License plate lamp

Instrument panel switch

Daytime running lamp
block (hazard warning
lamp switch)

Brake switch Rear fog lamp

BCM

Smart key Remote control Reverse lamp

key signal

Backlight Front position lamp

Instrument brightness
cluster

Collision signal Brake lamp, rear position

lamp

R position High-mounted stop lamp

signal

Emergency
GWM

brake lamp ON
RLS
signal

Brake lamp ON
signal
To B-CAN system

GAC Motor 2023

Electrics (I) 1-273 External lighting system

1.4.5 Common fault diagnosis

1.4.5.1 Diagnostic instructions
Familiarize yourself with the system functions and operations before starting the system diagnosis. This helps correctly
determine the diagnostic procedure when a fault occurs, and more importantly, helps determine whether the situation
described by the customer is normal.
1.4.5.2 Visual inspection
• Check the aftermarket parts that may affect the operation of the external lighting system.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• If only one lamp fails to work, check and repair the poor contact or open circuit at the power supply or ground circuit
before replacing the bulb.
1.4.5.3 Low beam failure to work
1. Circuit diagram:

Instrument
panel PDU

Integrated BCM

Left front Right

combinati front
beam

beam

beam

beam
High

High
Low

Low

on lamp combinati
on lamp

Lamplight
Automatic
headlamp
beam

beam
High

on/off
Low

combination
switch

2. Diagnostic procedure
External lighting system 1-274 Electrics (I)

Caution
This diagnosis is applicable to models with LED headlamp, and can be a reference for the models with halogen
headlamp.

Step 1 Check the low beam.

A Check whether the low beam is burned out or

damaged.

Yes Replace the front combination lamp.

No

Step 2 Check the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―Low Beam‖
position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 10 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 3 Check the circuit between the lamplight combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 10
of the lamplight combination switch harness connector
IP26 and terminal 3 of the integrated BCM harness
connector IP01.
Standard resistance: less than 1Ω

Low beam switch E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-275 External lighting system

Integrated BCM harness connector

Lamplight combination switch

(low beam)

Yes

Step 4 Check the ground circuit of the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the power outlet circuit of the low beam.

External lighting system 1-276 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connectors
FB30 and IP75.
C Disconnect the left front combination lamp harness
connector FB09.
D Disconnect the right front combination lamp harness
connector FB10.
E Measure the resistance of circuit between terminal 6
of the integrated BCM harness connector FB30 and
terminal 1 of the left front combination lamp harness
Left front low beam
power supply connector FB09.
F Measure the resistance of circuit between terminal
A6 of the integrated BCM harness connector IP75 and
terminal 1 of the right front combination lamp harness
connector FB10.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Left front combination lamp harness connector

Low beam power

supply

No Repair or replace the harness.

Integrated BCM harness connector

Right front low beam

power supply

GAC Motor 2023

Electrics (I) 1-277 External lighting system

Right front combination lamp harness connector

Low beam power

supply

Yes

Step 6 Check the ground circuit of the low beam.

A Set the ENGINE START/STOP button to ―OFF‖

Left front combination lamp harness connector
position.
Low beam/high beam GND B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the right front combination lamp harness
connector FB10.
D Measure the resistance of circuit between terminal 4
of the left front combination lamp harness connector FB09
and the body ground.
E Measure the resistance of circuit between terminal 4
of the right front combination lamp harness connector
FB10 of and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front combination lamp harness connector

Low beam/high beam GND

No Repair or replace the harness.

Yes

Step 7 Replace the integrated BCM.

External lighting system 1-278 Electrics (I)

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.5.4 High beam failure to work

1. Circuit diagram:

Instrument
panel PDU

Integrated BCM

Left front Right

combinati front
beam

beam

beam

beam
High

High
Low

Low

on lamp combinati
on lamp

Lamplight
Automatic
headlamp
beam

beam
High

on/off
Low

combination
switch

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-279 External lighting system

Caution
This diagnosis is applicable to models with LED headlamp, and can be a reference for the models with halogen
headlamp.

Step 1 Check the high beam.

A Check whether the high beam is burned out or

damaged.

Yes Replace the front combination lamp.

No

Step 2 Check the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch
position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―High Beam‖
position.
D Use a multimeter to measure the resistance of
circuit between terminals 3 and 11 of the lamplight
combination switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the
standard value.

No Replace the lamplight combination switch.

Yes

Step 3 Check the circuit between the lamplight combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector position.
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 11
of the lamplight combination switch harness connector
IP26 and terminal 30 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω

High beam switch E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

External lighting system 1-280 Electrics (I)

Integrated BCM harness connector

Lamplight combination
switch (high beam)

Yes

Step 4 Check the ground circuit of the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the power outlet circuit of the high beam.

GAC Motor 2023

Electrics (I) 1-281 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the left front combination lamp harness
connector FB09.
D Disconnect the right front combination lamp harness
connector FB10.
E Measure the resistance of circuit between terminal
B10 of the integrated BCM harness connector IP75 and
terminal 5 of the left front combination lamp harness
Right front high beam
power supply
connector FB09.
Left front high beam power
supply F Measure the resistance of circuit between terminal
B18 of the integrated BCM harness connector IP75 and
terminal 5 of the right front combination lamp harness
connector FB10.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Left front combination lamp harness connector

High beam power supply

No Repair or replace the harness.

Right front combination lamp harness connector

High beam power supply

Yes

Step 6 Check the ground circuit of the high beam.

External lighting system 1-282 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Left front combination lamp harness connector
position.
Low beam/high beam GND B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the right front combination lamp harness
connector FB10.
D Measure the resistance of circuit between terminal 4
of the left front combination lamp harness connector FB09
and the body ground.
E Measure the resistance of circuit between terminal 4
of the right front combination lamp harness connector
FB10 of and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front combination lamp harness connector

Low beam/high beam GND

No Repair or replace the harness.

Yes

Step 7 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.5.5 Daytime running lamp failure to work

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-283 External lighting system

Instrument
panel PDU

Integrated BCM

Left front Right

running lamp

combinati running lamp front

Daytime

on lamp Daytime combinati

on lamp

2. Diagnostic procedure
Caution
This section describes the faults of models without lighting controller, and the fault diagnostic procedures of models with
lighting controller are similar.

Step 1 Check the daytime running lamp.

A Check whether the daytime running lamp is burned out

or damaged.

Yes Replace the daytime running lamp (front

combination lamp).

No

Step 2 Check the circuit between the daytime running lamp and the integrated BCM.
External lighting system 1-284 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector position.
Right daytime running B Disconnect the integrated BCM harness connector
lamp power supply IP75.
C Disconnect the left front combination lamp harness
connector FB09.
D Disconnect the right front combination lamp harness
connector FB10.
E Measure the resistance of circuit between terminal
B8 of the integrated BCM harness connector IP75 and
terminal 10 of the left front combination lamp harness
Left daytime running lamp
power supply connector FB09.
F Measure the resistance of circuit between terminal
B1 of the integrated BCM harness connector IP75 and
terminal 10 of the right front combination lamp harness
connector FB10.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Left front combination lamp harness connector

Daytime running lamp

power supply

No Replace or repair the harness or

connector.
Right front combination lamp harness connector

Daytime running lamp

power supply

Yes

Step 3 Check the ground circuit of the daytime running lamp.

GAC Motor 2023

Electrics (I) 1-285 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Left front combination lamp harness connector
position.
Position lamp/turn signal lamp/daytime
running lamp ground B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the right front combination lamp harness
connector FB10.
D Measure the resistance of circuit between terminal 4
of the left front combination lamp harness connector FB09
and the body ground.
E Measure the resistance of circuit between terminal 4
of the right front combination lamp harness connector
FB10 of and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front combination lamp harness connector

Position lamp/turn signal lamp/daytime

running lamp ground

No Replace or repair the harness or

connector.

Yes

Step 4 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.4.5.6 Left turn signal lamp failure to work

1. Circuit diagram
External lighting system 1-286 Electrics (I)

Instrument
panel PDU

Lamplight
combinatio

signal lamp

signal lamp
Right turn
n switch

Left turn
Left front door control module Integrated BCM

Left rear Turn signal Left

Left combin lamp front

Turn signal
Turn signal

exterior ation combin

lamp
lamp

rearvie lamp A ation

w mirror lamp

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the left turn signal lamp.

A Check whether the left front turn signal lamp, left

exterior rearview mirror turn signal lamp and left rear turn
signal lamp are burned out or damaged.

Yes Replace the left front or left rear

combination lamp A or the left exterior
rearview mirror assembly.

No

Step 2 Check the turn signal lamp fuse IF36.

GAC Motor 2023

Electrics (I) 1-287 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

position.
B Unplug the fuse IF36 and check whether it is blown.
The fuse IF36 is rated at 15A

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

Step 3 Check the power supply circuit of the turn signal lamp.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
Integrated BCM power supply (turn signal B Disconnect the integrated BCM harness connector
lamp)
IP75.
C Set the ENGINE START/STOP button to ―ON‖
position.
D Measure the voltage of circuit between terminal A3 of
the integrated BCM harness connector IP75 and the body
ground.
Standard voltage: 11-14V
E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch
position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―Left Turn
Signal Lamp‖ position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 6 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 5 Check the circuit between the lamplight combination switch and the integrated BCM.
External lighting system 1-288 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
Left turn signal lamp switch B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 6
of the lamplight combination switch harness connector
IP26 and terminal 47 of the integrated BCM harness
connector IP01.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

Lamplight combination
switch (left turn signal lamp)

Yes

Step 6 Check the ground circuit of the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-289 External lighting system

Integrated BCM harness connector

GND

Yes

Step 7 Check the circuit between the left front turn signal lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the left front combination lamp harness
connector FB09.
D Measure the resistance of circuit between terminal
B4 of the integrated BCM harness connector IP75 and
terminal 6 of the left front combination lamp harness
connector FB09.
Standard resistance: less than 1Ω
Left front/rear turn signal E Verify if the resistance is consistent with the standard
lamp power supply
value.

Left front combination lamp harness connector

Turn signal lamp power

supply

No Replace or repair the harness or

connector.

Yes

Step 8 Check the ground circuit of the left front turn signal lamp.
External lighting system 1-290 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Left front combination lamp harness connector position.
Position lamp/turn signal lamp/daytime B Disconnect the left front combination lamp harness
running lamp ground
connector FB09.
C Measure the resistance of circuit between terminal 4
of left front combination lamp harness connector FB09 and
the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 9 Check the circuit between the left exterior rearview mirror turn signal lamp and the left front door control
module.

A Set the ENGINE START/STOP button to ―OFF‖

Left front door control module harness connector
position.
B Disconnect the left front door control module harness
connector DD20.
C Disconnect the left exterior rearview mirror harness
connector DD14.
D Measure the resistance of circuit between terminal 24
of the left front door control module harness connector
DD20 and terminal 7 of the left exterior rearview mirror
harness connector DD14.
Standard resistance: less than 1Ω
Left exterior rearview mirror turn signal
lamp power supply E Verify if the resistance is consistent with the standard
value.

Left exterior rearview mirror harness connector

Turn signal lamp power supply

No Replace or repair the harness or

connector.

Yes

Step 10 Check the ground circuit of the left exterior rearview mirror turn signal lamp.

GAC Motor 2023

Electrics (I) 1-291 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Left exterior rearview mirror harness connector position.
GND B Disconnect the left exterior rearview mirror harness
connector DD14.
C Measure the resistance of circuit between terminal 6
of the left exterior rearview mirror harness connector DD14
and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 11 Check the circuit between the left rear turn signal lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the left rear combination lamp A harness
connector BD01.
D Measure the resistance of circuit between terminal
B4 of the integrated BCM harness connector IP75 and
terminal 3 of the left rear combination lamp A harness
connector BD01.
Standard resistance: less than 1Ω
Left front/rear turn signal lamp E Verify if the resistance is consistent with the standard
power supply value.

Left rear combination lamp A harness connector

No Replace or repair the harness or

connector.

Turn signal lamp power supply

Yes

Step 12 Check the ground circuit of the left rear turn signal lamp.
External lighting system 1-292 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Left rear combination lamp A harness connector
position.
B Disconnect the left rear combination lamp A
harness connector BD01.
C Measure the resistance of circuit between terminal 4
of the left rear combination lamp A harness connector
BD01 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the
standard value.
No Replace or repair the harness or
GND
connector.

Yes

Step 13 Check the CAN data communication cable between the integrated BCM and the left front door control
module.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP01.
C Disconnect the left front door control module harness
connector DD21.
D Measure the resistance of circuit between terminal 41
of the integrated BCM harness connector IP01 and
terminal 10 of the left front door control module harness
connector DD21.
E Measure the resistance of circuit between terminal 42
of the integrated BCM harness connector IP01 and
terminal 9 of the left front door control module harness
connector DD21.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left front door control module harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 14 Replace the left front door control module.

GAC Motor 2023

Electrics (I) 1-293 External lighting system

A Replace the left front door control module.

B Verify if the fault is eliminated after the left front door
control module is replaced.

Yes The system is working normally.

No

Step 15 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 16 End.

1.4.5.7 Right turn signal lamp failure to work

1. Circuit diagram
External lighting system 1-294 Electrics (I)

Instrument
panel PDU

Lamplight
combinatio

signal lamp

signal lamp
Right turn
Left turn
n switch

Right front door control Integrated BCM

module

Left rear Turn signal Left

Left combin lamp front

Turn signal
Turn signal

exterior ation combin

lamp
lamp

rearvie lamp A ation

w mirror lamp

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the right turn signal lamp.

A Check whether the right front turn signal lamp, right

exterior rearview mirror turn signal lamp and right rear turn
signal lamp are burned out or damaged.

Yes Replace the right front or right rear

combination lamp A or the right exterior
rearview mirror assembly.

No

Step 2 Check the turn signal lamp fuse IF36.

GAC Motor 2023

Electrics (I) 1-295 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

position.
B Unplug the fuse IF36 and check whether it is blown.
The fuse IF36 is rated at 15A

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

Step 3 Check the power supply circuit of the turn signal lamp.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
Integrated BCM power supply (turn signal B Disconnect the integrated BCM harness connector
lamp)
IP75.
C Set the ENGINE START/STOP button to ―ON‖
position.
D Measure the voltage of circuit between terminal A3 of
the integrated BCM harness connector IP75 and the body
ground.
Standard voltage: 11-14V
E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch
position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―Right Turn
Signal Lamp‖ position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 12 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 5 Check the circuit between the lamplight combination switch and the integrated BCM.
External lighting system 1-296 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 12
of the lamplight combination switch harness connector
IP26 and terminal 33 of the integrated BCM harness
connector IP01.
Standard resistance: less than 1Ω
Right turn signal lamp switch E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Lamplight combination switch

(right turn signal lamp)

No Repair or replace the harness.

Yes

Step 6 Check the ground circuit of the lamplight combination switch.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-297 External lighting system

Integrated BCM harness connector

GND

Yes

Step 7 Check the circuit between the right front turn signal lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the right front combination lamp harness
connector FB10.
D Measure the resistance of circuit between terminal
B5 of the integrated BCM harness connector IP75 and
terminal 6 of the right front combination lamp harness
connector FB10.
Standard resistance: less than 1Ω
Right front/rear turn signal lamp E Verify if the resistance is consistent with the standard
power supply value.

Right front combination lamp harness connector

Turn signal lamp power supply

No Replace or repair the harness or

connector.

Yes

Step 8 Check the ground circuit of the right front turn signal lamp.
External lighting system 1-298 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Right front combination lamp harness connector
position.
Position lamp/turn signal
lamp/daytime running lamp ground B Disconnect the right front combination lamp harness
connector FB10.
C Measure the resistance of circuit between terminal 4
of the right front combination lamp harness connector
FB10 of and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 9 Check the circuit between the right exterior rearview mirror turn signal lamp and the right front door control
module.

A Set the ENGINE START/STOP button to ―OFF‖

Right front door control module harness connector position.
B Disconnect the right front door control module
harness connector PD20.
C Disconnect the right exterior rearview mirror harness
connector PD14.
D Measure the resistance of circuit between terminal 24
of the right front door control module harness connector
PD20 and terminal 7 of the right exterior rearview mirror
harness connector PD14.
Standard resistance: less than 1Ω
Right exterior rearview mirror turn
signal lamp power supply E Verify if the resistance is consistent with the standard
value.

Right exterior rearview mirror harness connector

Turn signal lamp power supply

No Replace or repair the harness or

connector.

Yes

Step 10 Check the ground circuit of the right exterior rearview mirror turn signal lamp.

GAC Motor 2023

Electrics (I) 1-299 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Right exterior rearview mirror harness connector position.
GND
B Disconnect the right exterior rearview mirror harness
connector PD14.
C Measure the resistance of circuit between terminal 6
of the right exterior rearview mirror harness connector
PD14 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Replace or repair the harness or
connector.

Yes

Step 11 Check the circuit between the right rear turn signal lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the right rear combination lamp A
harness connector BD02.
D Measure the resistance of circuit between terminal
B5 of the integrated BCM harness connector IP75 and
terminal 3 of the right rear combination lamp A harness
connector BD02.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.
Right front/rear turn signal lamp
power supply

Right rear combination lamp A harness connector

No Replace or repair the harness or

connector.

Turn signal lamp power supply

Yes

Step 12 Check the ground circuit of the right rear turn signal lamp.
External lighting system 1-300 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Right rear combination lamp A harness connector position.
B Disconnect the right rear combination lamp A
harness connector BD02.
C Measure the resistance of circuit between terminal 4
of the right rear combination lamp A harness connector
BD02 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Replace or repair the harness or
connector.
GND

Yes

Step 13 Check the CAN data communication cable between the integrated BCM and the right front door control
module.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP01.
C Disconnect the right front door control module
harness connector PD21.
D Measure the resistance of circuit between terminal 41
of the integrated BCM harness connector IP01 and
terminal 10 of the right front door control module harness
connector PD21.
E Measure the resistance of circuit between terminal 42
of the integrated BCM harness connector IP01 and
terminal 9 of the right front door control module harness
connector PD21.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front door control module harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 14 Replace the right front door control module.

GAC Motor 2023

Electrics (I) 1-301 External lighting system

A Replace the right front door control module.

B Verify if the fault is eliminated after the right front
door control module is replaced.

Yes The system is working normally.

No

Step 15 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 16 End.

1.4.5.8 Left position lamp failure to work

1. Circuit diagram
External lighting system 1-302 Electrics (I)

Instrument
panel PDU
Position lamp
Lamplight
combination
switch

Integrated BCM

Left Right Left Right

Position lamp

Position lamp

Position lamp

Position lamp
front front rear rear
combin combin combin combin
ation ation ation ation
lamp lamp lamp A lamp A

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the left position lamp.

A Check the left front/rear position lamp for burn-out,

water invasion or damage.

Yes Replace the left front combination lamp or

the left rear combination lamp.

No

Step 2 Check the lamplight combination switch.

GAC Motor 2023

Electrics (I) 1-303 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―Position
Lamp‖ position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 9 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 3 Check the circuit between the lamplight combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
FB30.
D Measure the resistance of circuit between terminal 9
of the lamplight combination switch harness connector
IP26 and terminal 51 of the integrated BCM harness
connector FB30.
Standard resistance: less than 1Ω
Position lamp switch E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

Lamplight combination switch

(position lamp)

Yes

Step 4 Check the ground circuit of the lamplight combination switch.

External lighting system 1-304 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector position.
GND B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the circuit between the left front position lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
Left front position lamp B Disconnect the integrated BCM harness connector
power
IP01.
C Disconnect the left front combination lamp harness
connector FB09.
D Measure the resistance of circuit between terminal 4
of the integrated BCM harness connector IP01 and
terminal 9 of the left front combination lamp harness
connector FB09.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

GAC Motor 2023

Electrics (I) 1-305 External lighting system

Left front combination lamp harness connector

Position lamp power supply

Yes

Step 6 Check the ground circuit of the left front position lamp.

A Set the ENGINE START/STOP button to ―OFF‖

Left front combination lamp harness connector
position.
Position lamp/turn signal lamp/daytime B Disconnect the left front combination lamp harness
running lamp ground
connector FB09.
C Measure the resistance of circuit between terminal 4
of the left front combination lamp harness connector FB09
and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 7 Check the circuit between the left rear position lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the left rear combination lamp A harness
connector BD01.
D Measure the resistance of circuit between terminal
B2 of the integrated BCM harness connector IP75 and
terminal 6 of the left rear combination lamp A harness
connector BD01.
Standard resistance: less than 1Ω
Left rear position lamp power E Verify if the resistance is consistent with the standard
supply value.

No Replace or repair the harness or

connector.
External lighting system 1-306 Electrics (I)

Left rear combination lamp A harness connector

Position lamp power supply

Yes

Step 8 Check the ground circuit of the left rear position lamp.

Left rear combination lamp A harness connector

A Set the ENGINE START/STOP button to ―OFF‖
position.
B Disconnect the left rear combination lamp A harness
connector BD01.
C Measure the resistance of circuit between terminal 4
of the left rear combination lamp A harness connector
BD01 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
GND No Replace or repair the harness or
connector.

Yes

Step 9 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 10 End.

1.4.5.9 Right position lamp failure to work

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-307 External lighting system

Instrument
panel PDU
Position lamp
Lamplight
combination
switch

Integrated BCM

Left Right Left Right

Position lamp

Position lamp

Position lamp

Position lamp
front front rear rear
combin combin combin combin
ation ation ation ation
lamp lamp lamp A lamp A

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the right position lamp.

A Check the right front/rear position lamp for burn-out,

water invasion or damage.

Yes Replace the right front or right rear

combination lamp.

No

Step 2 Check the lamplight combination switch.

External lighting system 1-308 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch
position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―Position
Lamp‖ position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 9 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 3 Check the circuit between the lamplight combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
FB30.
D Measure the resistance of circuit between terminal 9
of the lamplight combination switch harness connector
IP26 and terminal 51 of the integrated BCM harness
connector FB30.
Standard resistance: less than 1Ω
Position lamp switch E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

Lamplight combination switch

(position lamp)

Yes

Step 4 Check the ground circuit of the lamplight combination switch.

GAC Motor 2023

Electrics (I) 1-309 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the circuit between the right front position lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
Right front position lamp B Disconnect the integrated BCM harness connector
power IP01.
C Disconnect the right front combination lamp harness
connector FB10.
D Measure the resistance of circuit between terminal 16
of the integrated BCM harness connector IP01 and
terminal 9 of the right front combination lamp harness
connector FB10.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.
External lighting system 1-310 Electrics (I)
Right front combination lamp harness connector

Position lamp power supply

Yes

Step 6 Check the ground circuit of the right front position lamp.

Right front combination lamp harness connector A Set the ENGINE START/STOP button to ―OFF‖
position.
Position lamp/turn signal lamp/daytime
running lamp ground
B Disconnect the right front combination lamp harness
connector FB10.
C Measure the resistance of circuit between terminal 4
of the right front combination lamp harness connector
FB10 of and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 7 Check the circuit between the right rear position lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the right rear combination lamp A
harness connector BD02.
D Measure the resistance of circuit between terminal
B7 of the integrated BCM harness connector IP75 and
terminal 6 of the right rear combination lamp A harness
connector BD02.
Standard resistance: less than 1Ω

Right rear position lamp power supply

E Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

GAC Motor 2023

Electrics (I) 1-311 External lighting system

Right rear combination lamp A harness connector

Position lamp power supply

Yes

Step 8 Check the ground circuit of the right rear position lamp.

A Set the ENGINE START/STOP button to ―OFF‖

Right rear combination lamp A harness connector position.
B Disconnect the right rear combination lamp A
harness connector BD02.
C Measure the resistance of circuit between terminal 4
of the right rear combination lamp A harness connector
BD02 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
GND No Replace or repair the harness or
connector.

Yes

Step 9 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 10 End.

1.4.5.10 Rear fog lamp failure to work

1. Circuit diagram
External lighting system 1-312 Electrics (I)

Instrument
panel PDU

Lamplight
combination

Rear fog
lamp
switch

Integrated BCM

Rear
fog
lamp

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the rear fog lamp.

A Check whether the rear fog lamp is burned out or

damaged.

Yes Replace the rear fog lamp.

No

Step 2 Check the lamplight combination switch.

GAC Motor 2023

Electrics (I) 1-313 External lighting system

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch
position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to ―Rear Fog
Lamp‖ position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 5 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 3 Check the circuit between the lamplight combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector
position.
Rear fog lamp switch
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 5
of the lamplight combination switch harness connector
IP26 and terminal 45 of the integrated BCM harness
connector IP01.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

Lamplight combination switch (rear

fog lamp)

Yes

Step 4 Check the ground circuit of the lamplight combination switch.

External lighting system 1-314 Electrics (I)

A Set the ENGINE START/STOP button to ―OFF‖

Lamplight combination switch harness connector position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector
IP26 and terminal 31 of the integrated BCM harness
connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the wire between the rear fog lamp and the integrated BCM.

A Set the ENGINE START/STOP button to ―OFF‖

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the rear fog lamp harness connector
RB01.
D Measure the resistance of circuit between terminal
B13 of the integrated BCM harness connector IP75 and
terminal 1 of the rear fog lamp harness connector RB01.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
Rear fog lamp power supply
value.

No Replace or repair the harness or

connector.

GAC Motor 2023

Electrics (I) 1-315 External lighting system

Rear fog lamp harness connector

Rear fog lamp power supply

Yes

Step 6 Check the ground circuit of the rear fog lamp.

A Set the ENGINE START/STOP button to ―OFF‖

Rear fog lamp harness connector position.

Rear fog lamp ground B Disconnect the rear fog lamp harness connector
RB01.
C Measure the resistance of circuit between terminal 2
of the rear fog lamp harness connector RB01 and the body
ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 7 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.5.11 Brake lamp failure to work

1. Circuit diagram
External lighting system 1-316 Electrics (I)

Engine Instrument
compart panel PDU
ment
PDU

Brake
switch
N/O

N/C

Integrated BCM

High-mounted stop
Left Right
Brake lamp

Brake lamp

rear rear

lamp
combin combin
ation ation
lamp A lamp A

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the brake lamp.

A Check whether the brake lamp is burned out or damaged.

Yes Replace the rear combination lamp A.

No

Step 2 Check whether the brake switch is installed correctly.

A Check whether the brake switch is installed in correct

position.

GAC Motor 2023

Electrics (I) 1-317 External lighting system

No Reinstall the brake switch.

Yes

Step 3 Check the brake switch.

A Set the ENGINE START/STOP button to “OFF”

Brake switch
position.
B Disconnect the brake switch harness connector FB24.
C Depress the brake pedal, and check the continuity of the
internal circuit between terminals 1 and 2 of the brake
switch component.
D Release the brake pedal, and check the continuity of the
internal circuit between terminals 3 and 4 of the brake
switch component.

No Replace the brake switch.

Yes

Step 4 Check the circuit between the brake switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Brake switch harness connector position.
N/O signal
B Disconnect the brake switch harness connector FB24.
C Disconnect the integrated BCM harness connectors
BD11 and FB30.
D Measure the resistance of circuit between terminal 1
of the brake switch harness connector FB24 and terminal 5
of the integrated BCM harness connector BD11.
E Measure the resistance of circuit between terminal 4
of the brake switch harness connector FB24 and terminal
45 of the integrated BCM harness connector FB30.
N/C signal
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Replace the brake switch.

GAC Motor 2023

External lighting system 1-318 Electrics (I)

Integrated BCM harness connector

Brake switch N/O signal

Integrated BCM harness connector

Brake switch N/C signal

Yes

Step 5 Check the power supply circuit of brake switch.

A Check whether the power supply circuit of brake switch is

normal.

No Repair or replace the harness.

Yes

Step 6 Check the circuit between the brake lamp and the integrated BCM.

GAC Motor 2023

Electrics (I) 1-319 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the left rear combination lamp A harness
connector BD01.
D Disconnect the right rear combination lamp A harness
connector BD02.
E Measure the resistance of circuit between terminal
B12 of the integrated BCM harness connector IP75 and
terminal 1 of the left rear combination lamp A harness
connector BD01.
Brake lamp power
supply F Measure the resistance of circuit between terminal
B12 of the integrated BCM harness connector IP75 and
terminal 1 of the right rear combination lamp A harness
connector BD02.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Left rear combination lamp A harness connector

Brake lamp power

supply

No Replace or repair the harness or

connector.
Right rear combination lamp A harness connector

Brake lamp power

supply

Yes

Step 7 Check the ground circuit of the brake lamp.

GAC Motor 2023

External lighting system 1-320 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector
position.
B Disconnect the left rear combination lamp A harness
connector BD01.
C Disconnect the right rear combination lamp A harness
connector BD02.
D Measure the resistance of circuit between terminal 4
of the harness connector BD01 of left rear combination
lamp A and the body ground.
E Measure the resistance of circuit between terminal 4
of the right rear combination lamp A harness connector
GND BD02 and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right rear combination lamp A harness connector

No Replace or repair the harness or

connector.

GND

Yes

Step 8 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 9 End.

1.4.5.12 High-mounted stop lamp failure to work

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-321 External lighting system

Engine Instrument
compart panel PDU
ment
PDU

Brake
switch
N/O

N/C

Integrated BCM

High-mounted stop
Left Right
Brake lamp

Brake lamp

rear rear

lamp
combin combin
ation ation
lamp A lamp A

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the high-mounted stop lamp.

A Check the high-mounted stop lamp for burn-out,

water invasion or damage.

Yes Replace the high-mounted stop lamp.

No

Step 2 Check whether the brake switch is installed correctly.

A Check whether the brake switch is installed in correct

position.

GAC Motor 2023

External lighting system 1-322 Electrics (I)

No Reinstall the brake switch.

Yes

Step 3 Check the brake switch.

A Set the ENGINE START/STOP button to “OFF”

Brake switch
position.
B Disconnect the brake switch harness connector
FB24.
C Depress the brake pedal, and check the continuity of the
internal circuit between terminals 1 and 2 of the brake
switch component.
D Release the brake pedal, and check the continuity of the
internal circuit between terminals 3 and 4 of the brake
switch component.

No Replace the brake switch.

Yes

Step 4 Check the circuit between the brake switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Brake switch harness connector
position.
N/O signal
B Disconnect the brake switch harness connector FB24.
C Disconnect the integrated BCM harness connectors
BD11 and FB30.
D Measure the resistance of circuit between terminal 1
of the brake switch harness connector FB24 and terminal 5
of the integrated BCM harness connector BD11.
E Measure the resistance of circuit between terminal 4
of the brake switch harness connector FB24 and terminal
45 of the integrated BCM harness connector FB30.
N/C signal
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Replace the brake switch.

GAC Motor 2023

Electrics (I) 1-323 External lighting system

Integrated BCM harness connector

Brake switch N/O signal

Integrated BCM harness connector

Brake switch N/C signal

Yes

Step 5 Check the power supply circuit of brake switch.

A Check whether the power supply circuit of brake switch is

normal.

No Repair or replace the harness.

Yes

Step 6 Check the circuit between the high-mounted stop lamp and the integrated BCM.

GAC Motor 2023

External lighting system 1-324 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

High-mounted stop lamp harness connector position.
power supply
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the high-mounted stop lamp harness
connector TK06.
D Measure the resistance of circuit between terminal 1
of the high-mounted stop lamp harness connector TK06
and terminal B15 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Replace or repair the harness or

connector.

High-mounted stop lamp

power supply

Yes

Step 7 Check the ground circuit of the high-mounted stop lamp.

High-mounted stop lamp harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
GND
B Disconnect the high-mounted stop lamp harness
connector TK06.
C Measure the resistance of circuit between terminal 2
of the high-mounted stop lamp harness connector TK06
and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 8 Replace the integrated BCM.

GAC Motor 2023

Electrics (I) 1-325 External lighting system

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 9 End.

1.4.5.13 Reverse lamp failure to work

1. Circuit diagram

Instrument
panel PDU

Integrated BCM
Reverse lamp
Reverse lamp

2. Diagnostic procedure

GAC Motor 2023

External lighting system 1-326 Electrics (I)

Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the reverse lamp.

A Check if the reversing lamp is ablated or damaged.

Yes Replace the rear reverse lamp.

No

Step 2 Check the circuit between the reverse lamp and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the rear reverse lamp harness connector
RB05.
E Measure the resistance of circuit between terminal
B11 of the integrated BCM harness connector IP75 and
terminal 1 of the rear reverse lamp harness connector
RB05.
Standard resistance: less than 1Ω
Reverse lamp power E Verify if the resistance is consistent with the standard
supply value.

Reverse lamp harness connector

power supply

No Replace or repair the harness or

connector.

Yes

Step 3 Check the ground circuit of the reverse lamp.

GAC Motor 2023

Electrics (I) 1-327 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Reverse lamp harness connector
position.
GND B Disconnect the rear reverse lamp harness connector
RB05.
E Measure the resistance of circuit between terminal 2
of the rear reverse lamp harness connector RB05 and the
body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 4 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.4.5.14 License plate lamp failure to work

1. Circuit diagram

GAC Motor 2023

External lighting system 1-328 Electrics (I)

Instrument
panel PDU

Integrated BCM

plate lamp
License
Lamplight
combination
Position lamp switch

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the license plate lamp.

A Check whether the license plate lamp is ablated or

damaged.

Yes Replace the license plate lamp.

No

Step 2 Check the lamplight combination switch.

GAC Motor 2023

Electrics (I) 1-329 External lighting system

Lamplight combination switch A Set the ENGINE START/STOP button to “OFF”

position.
B Remove the lamplight combination switch.
C Set the lamplight combination switch to “Position
Lamp” position.
D Use a multimeter to measure the resistance of circuit
between terminals 3 and 9 of the lamplight combination
switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the lamplight combination switch.

Yes

Step 3 Check the circuit between the lamplight combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Lamplight combination switch harness connector
position.
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
FB30.
D Measure the resistance of circuit between terminal 9
of the lamplight combination switch harness connector IP26
and terminal 51 of the integrated BCM harness connector
FB30.
Standard resistance: less than 1Ω

Position lamp switch E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

Lamplight combination switch

(position lamp)

Yes

Step 4 Check the ground circuit of the lamplight combination switch.

GAC Motor 2023

External lighting system 1-330 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Lamplight combination switch harness connector position.
GND
B Disconnect the lamplight combination switch harness
connector IP26.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 3
of the lamplight combination switch harness connector IP26
and terminal 31 of the integrated BCM harness connector
BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the circuit between the license plate light and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
License plate lamp B Disconnect the integrated BCM harness connector
power supply IP01.
C Disconnect the license plate lamp harness connector
TK02.
D Measure the resistance of circuit between terminal 5
of the integrated BCM harness connector IP01 and terminal
1 of the license plate lamp harness connector TK02.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

GAC Motor 2023

Electrics (I) 1-331 External lighting system

License plate lamp harness connector

power supply

Yes

Step 6 Check the ground circuit of the license plate lamp.

A Set the ENGINE START/STOP button to “OFF”

License plate lamp harness connector
position.
GND B Disconnect the license plate lamp harness connector
TK02.
C Measure the resistance of circuit between terminal 2
of the license plate lamp harness connector TK02 and the
body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 7 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

GAC Motor 2023

External lighting system 1-332 Electrics (I)
1.4.6 Diagnostic information and procedure (left front combination lamp)
1.4.6.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of WCM without removing any part.
Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.4.6.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. And then simulate the identical or similar condition under which the symptom occurred on the
customer’s vehicle. No matter how skillful the service personnel are or how rich their experience is, they would ignore
some important things in their repair work and make some wrong determination without confirmation of the malfunction
symptom. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.4.6.3 ECU terminals
Left front combination lamp harness connector (FB09)
Left front combination lamp harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.75/red Low beam － －
2 0.35/white IG1 power supply － －
3 1.0/red Battery power supply － －
4 1.0/black GND － －
5 0.5/white High beam － －
6 0.35/pink Turn signal lamp － －
9 0.35/yellow Position lamp － －
10 0.35/green PRI-CANH － －
11 0.35/yellow PRI-CANL － －
12 0.35/white ALS motor power supply － －

GAC Motor 2023

Electrics (I) 1-333 External lighting system

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
13 0.35/blue ALS motor signal － －
14 0.35/black ALS motor GND － －

1.4.6.4 Data list

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.
Power supply voltage Power supply voltage 0 25.5 V
Time of failure - year 0 255 YY
Time of failure - month 1 12 MM
Time of failure - day 1 31 DD
Current time
Time of failure - hour 0 23 Hour
Time of failure _ minute 0 59 min
Time of failure _ second 0 59 s
Number of failures 0 65535 -
Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -

1.4.6.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

Low Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310016 Left Front Combination
abnormal lamp power supply harness
Lamp
High Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310017 Left Front Combination
abnormal lamp power supply harness
Lamp
Internal Fault of Left Front There is an internal wiring
B316004 Combination Lamp problem in the module or Replace the lamp
Module lamp
Lost Communication with
U16C387 There is a problem in lamp Replace the lamp
Dimming Motor
B31B096 Dimming Motor Faulty There is a problem in lamp Replace the lamp
U007388 Node Off-line Bus network is abnormal Check the vehicle bus network harness
There is a wiring problem in
Lost Communication with Check the headlamp connector and the
U014687 the lamp and the vehicle
GWM vehicle bus network harness
harness
Left Front Low Beam
B31A096 There is a problem in lamp Replace the lamp
Fault
Left Front High Beam
B31A196 There is a problem in lamp Replace the lamp
Fault
Left Front Daytime
B31A296 Running Lamp/Position There is a problem in lamp Replace the lamp
Lamp Fault
Left Front Turn Signal
B31A396 There is a problem in lamp Replace the lamp
Lamp Fault

1.4.6.6 DTC: B2E0016, B2E0017

Diagnostic trouble code DTC definition

B310016 Low Supply Voltage of Left Front Combination Lamp
B310017 High Supply Voltage of Left Front Combination Lamp
1. Circuit diagram

GAC Motor 2023

External lighting system 1-334 Electrics (I)

Instrument
panel PDU

Left front combination lamp

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

GAC Motor 2023

Electrics (I) 1-335 External lighting system

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the left front combination lamp fuse IF25.

A Check whether the fuse IF25 is blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuit of the fuse IF25.

A Check whether the circuit of fuse IF25 is shorted.

B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuse IF25 is rated at 7.5A
D Verify if the left front combination lamp works normally.

Yes The system is working normally.

No

Step 5 Check the power circuit of the left front combination lamp.

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
power supply B Disconnect the left front combination lamp harness
connector FB09.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminal 2 of the
left front combination lamp harness connector FB09 and
the body ground.
Standard voltage: 11~14V
E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 6 Check the ground circuit of the left front combination lamp.

GAC Motor 2023

External lighting system 1-336 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
GND B Disconnect the left front combination lamp harness
connector FB09.
C Measure the resistance of circuit between terminal 4
of left front combination lamp harness connector FB09 and
the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 7 Replace the left front combination lamp.

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.6.7 DTC: U007388

Diagnostic trouble code DTC definition

U007388 Node Off-line

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-337 External lighting system

Instrument
panel PDU

Left front combination lamp

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

GAC Motor 2023

External lighting system 1-338 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
B Disconnect the left front combination lamp harness
connector FB09.
C Measure the resistance of circuit between terminal 10
and terminal 11 of the left front combination lamp harness
connector FB09.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of left front combination lamp.

A Check if the power and ground wires of left front

combination lamp are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the left front combination lamp.

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.4.6.8 DTC: B316004, U16C387......

Diagnostic trouble code DTC definition

B316004 Internal Fault of Left Front Combination Lamp Module
U16C387 Lost Communication with Dimming Motor
B31B096 Dimming Motor Faulty

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-339 External lighting system

Instrument
panel PDU

Left front combination lamp

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground circuits of the left front combination lamp.

GAC Motor 2023

External lighting system 1-340 Electrics (I)

A Check whether the power and ground circuits of the left

front combination lamp are normal.

No Repair or replace the harness.

Yes

Step 3 Replace the left front combination lamp.

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.4.6.9 DTC: U014687

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-341 External lighting system

Instrument
panel PDU

Left front combination lamp

Ethernet

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the left front combination lamp and the GWM harness
connector.

GAC Motor 2023

External lighting system 1-342 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector position.
B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the GWM harness connector IP63.
D Measure the resistance of circuit between terminal 10
of the left front combination lamp harness connector FB09
and terminal 8 of the GWM harness connector IP63.
E Measure the resistance of circuit between terminal 11
of the left front combination lamp harness connector FB09
and terminal 28 of the GWM harness connector IP63.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground circuits of the GWM.

A Check whether the power and ground circuits of

GWM are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the left front combination lamp.

GAC Motor 2023

Electrics (I) 1-343 External lighting system

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.4.6.10 DTC: B31A096, B31A196

Diagnostic trouble code DTC definition

B31A096 Left Front Low Beam Fault
B31A196 Left Front High Beam Fault

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Left
High beam

Low beam

front
combin
ation
lamp

GAC Motor 2023

External lighting system 1-344 Electrics (I)
2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the high/low beam circuit between the left front combination lamp and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
High beam control B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the integrated BCM harness connectors
FB30 and IP75.
D Measure the resistance of circuit between terminal 1
of the left front combination lamp harness connector FB09
and terminal 6 of the integrated BCM harness connector
FB30.
E Measure the resistance of circuit between terminal 5
of the left front combination lamp harness connector FB09
and terminal B10 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Low beam control

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-345 External lighting system

Left front combination lamp harness connector

Low beam control

High beam control

Yes

Step 3 Check whether the high/low beam circuit of the left front combination lamp is shorted to ground.

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
Low beam control B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the integrated BCM harness connectors
FB30 and IP75.
D Measure the resistance of circuit between terminal 1
of the left front combination lamp harness connector FB09
and the body ground.
E Measure the resistance of circuit between terminal 5
of left front combination lamp harness connector FB09 and
the body ground.
High beam control
Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the high/low beam circuit of the left front combination lamp is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
Low beam control B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the integrated BCM harness connectors
FB30 and IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 1 of the
left front combination lamp harness connector FB09 and
the body ground.
F Measure the voltage of circuit between terminal 5 of the
High beam control
left front combination lamp harness connector FB09 and
the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

GAC Motor 2023

External lighting system 1-346 Electrics (I)

Yes

Step 5 Replace the left front combination lamp.

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.4.6.11 DTC: B31A296

Diagnostic trouble code DTC definition

B31A296 Left Front Daytime Running Lamp/Position Lamp Fault

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-347 External lighting system

Instrument
panel PDU

Integrated BCM

Daytime running

Left front
combinati
lamp

on lamp

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the daytime running lamp circuit between the left front combination lamp and the integrated BCM.

GAC Motor 2023

External lighting system 1-348 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Daytime running lamp B Disconnect the left front combination lamp harness
control
connector FB09.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 10
of the left front combination lamp harness connector FB09
and terminal B8 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Left front combination lamp harness connector

Daytime running lamp

control

No Repair or replace the harness.

Yes

Step 3 Check whether the daytime running lamp circuit of the left front combination lamp is shorted to ground.

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
Daytime running lamp B Disconnect the left front combination lamp harness
control
connector FB09.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 10
of the left front combination lamp harness connector FB09
and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the daytime running lamp circuit of the left front combination lamp is shorted to power supply.

GAC Motor 2023

Electrics (I) 1-349 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
Daytime running lamp B Disconnect the left front combination lamp harness
control connector FB09.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 10 of the
left front combination lamp harness connector FB09 and
the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.

No Repair or replace the harness.

Yes

Step 5 Replace the left front combination lamp.

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.4.6.12 DTC: B31A396

Diagnostic trouble code DTC definition

B31A396 Left Front Turn Signal Lamp Fault

1. Circuit diagram

GAC Motor 2023

External lighting system 1-350 Electrics (I)

Instrument
panel PDU

Integrated BCM

Left front
Turn signal

combinati
lamp

on lamp

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the turn signal lamp circuit between the left front combination lamp and the integrated BCM.

GAC Motor 2023

Electrics (I) 1-351 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Left front turn signal B Disconnect the left front combination lamp harness
lamp control connector FB09.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the left front combination lamp harness connector FB09
and terminal B4 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Left front combination lamp harness connector

No Repair or replace the harness.

Left front turn signal

lamp control

Yes

Step 3 Check whether the turn signal lamp circuit of the left front combination lamp is shorted to ground.

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the left front combination lamp harness connector FB09
and the body ground.

Left front turn signal

Standard resistance: 10kΩ or higher
lamp control
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check whether the turn signal lamp circuit of the left front combination lamp is shorted to power supply.

GAC Motor 2023

External lighting system 1-352 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left front combination lamp harness connector
position.
B Disconnect the left front combination lamp harness
connector FB09.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 6 of the
Left front turn signal left front combination lamp harness connector FB09 and
lamp control the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.

No Repair or replace the harness.

Yes

Step 5 Replace the left front combination lamp.

A Replace the left front combination lamp.

B Verify if the fault is eliminated after the left front
combination lamp is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-353 External lighting system
1.4.7 Diagnostic information and procedure (right front combination lamp)
1.4.7.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of FRLCM without removing any part.
Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.4.7.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. And then simulate the identical or similar condition under which the symptom occurred on the
customer’s vehicle. No matter how skillful the service personnel are or how rich their experience is, they would ignore
some important things in their repair work and make some wrong determination without confirmation of the malfunction
symptom. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.4.7.3 ECU terminals
Right front combination lamp harness connector (FB10)

Right front combination lamp harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.75/red Low beam － －
2 0.35/white IG1 power supply － －
3 1.0/red Battery power supply － －
4 1.0/black GND － －
5 0.5/white High beam － －
6 0.35/blue Turn signal lamp － －
9 0.35/yellow Position lamp － －
10 0.35/green PRI-CANH － －
11 0.35/yellow PRI-CANL － －
12 0.35/white ALS motor power supply － －

GAC Motor 2023

External lighting system 1-354 Electrics (I)

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
13 0.35/blue ALS motor signal － －
14 0.35/black ALS motor GND － －

1.4.7.4 Data list

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.
Power supply voltage Power supply voltage 0 25.5 V
Time of failure - year 0 2255 YY
Time of failure - month 1 12 MM
Time of failure - day 1 31 DD
System time
Time of failure - hour 0 23 Hour
Time of failure _ minute 0 59 min
Time of failure _ second 0 59 s
Number of failures 0 65535 -
Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -

1.4.7.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

Low Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310516 Right Front Combination
abnormal lamp power supply harness
Lamp
High Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310517 Right Front Combination
abnormal lamp power supply harness
Lamp
Internal Fault of Right There is an internal wiring
B316504 Front Combination Lamp problem in the module or Replace the lamp
Module lamp
Lost Communication
U16C387 There is a problem in lamp Replace the lamp
with Dimming Motor
B31B096 Dimming Motor Faulty There is a problem in lamp Replace the lamp
U007388 Node Off-line Bus network is abnormal Check the vehicle bus network harness
There is a wiring problem
Lost Communication Check the headlamp connector and the
U014687 in the lamp and the vehicle
with GWM vehicle bus network harness
harness
Right Front Low Beam
B31A596 There is a problem in lamp Replace the lamp
Fault
Right Front High Beam
B31A696 There is a problem in lamp Replace the lamp
Fault
Right Front Daytime
B31A796 Running Lamp/Position There is a problem in lamp Replace the lamp
Lamp Fault
Right Front Turn Signal
B31A896 There is a problem in lamp Replace the lamp
Lamp Fault

1.4.7.6 DTC: B310516, B310517

Diagnostic trouble code DTC definition

B310516 Low Supply Voltage of Right Front Combination Lamp
B310517 High Supply Voltage of Right Front Combination Lamp
1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-355 External lighting system

Instrument
panel PDU

Right front combination lamp

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

GAC Motor 2023

External lighting system 1-356 Electrics (I)

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the right front combination lamp fuse IF25.

A Check whether the fuse IF25 is blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuit of the fuse IF25.

A Check whether the circuit of fuse IF25 is shorted.

B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuse IF25 is rated at 7.5A
D Verify if the right front combination lamp works normally.

Yes The system is working normally.

No

Step 5 Check the power circuit of the right front combination lamp.

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
power supply B Disconnect the right front combination lamp harness
connector FB10.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminal 2 of
the right front combination lamp harness connector FB10 of
and the body ground.
Standard voltage: 11~14V
E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 6 Check the ground circuit of the right front combination lamp.

GAC Motor 2023

Electrics (I) 1-357 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
GND B Disconnect the right front combination lamp harness
connector FB10.
C Measure the resistance of circuit between terminal 4
of the right front combination lamp harness connector FB10
of and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 7 Replace the right front combination lamp.

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.7.7 DTC: U007388

Diagnostic trouble code DTC definition

U007388 Node Off-line

1. Circuit diagram

GAC Motor 2023

External lighting system 1-358 Electrics (I)

Instrument
panel PDU

Right front combination lamp

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

GAC Motor 2023

Electrics (I) 1-359 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
B Disconnect the right front combination lamp harness
connector FB10.
C Measure the resistance of circuit between terminal 10
and terminal 11 of right front combination lamp harness
connector FB10.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of right front combination lamp.

A Check if the power and ground wires of right front

combination lamp are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the right front combination lamp.

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.4.7.8 DTC: B316504, U16C387......

Diagnostic trouble code DTC definition

B316504 Internal Fault of Right Front Combination Lamp Module
U16C387 Lost Communication with Dimming Motor
B31B096 Dimming Motor Faulty

1. Circuit diagram

GAC Motor 2023

External lighting system 1-360 Electrics (I)

Instrument
panel PDU

Right front combination lamp

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground circuits of the right front combination lamp.

GAC Motor 2023

Electrics (I) 1-361 External lighting system

A Check whether the power and ground circuits of the right

front combination lamp are normal.

No Repair or replace the harness.

Yes

Step 3 Replace the right front combination lamp.

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.4.7.9 DTC: U014687

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM

1. Circuit diagram

GAC Motor 2023

External lighting system 1-362 Electrics (I)

Instrument
panel PDU

Right front combination lamp

Ethernet

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the right front combination lamp and the GWM harness
connector.

GAC Motor 2023

Electrics (I) 1-363 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector position.
B Disconnect the right front combination lamp harness
connector FB10.
C Disconnect the GWM harness connector IP63.
D Measure the resistance of circuit between terminal 10
of the right front combination lamp harness connector FB10
and terminal 8 of the GWM harness connector IP63.
E Measure the resistance of circuit between terminal 11
of the right front combination lamp harness connector FB10
and terminal 28 of the GWM harness connector IP63.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground circuits of the GWM.

A Check whether the power and ground circuits of

GWM are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the right front combination lamp.

GAC Motor 2023

External lighting system 1-364 Electrics (I)

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.4.7.10 DTC: B31A596, B31A696

Diagnostic trouble code DTC definition

B31A596 Right Front Low Beam Fault
B31A696 Right Front High Beam Fault

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Right
High beam

Low beam

front
combin
ation
lamp

GAC Motor 2023

Electrics (I) 1-365 External lighting system
2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the high/low beam circuit between the right front combination lamp and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
High beam control B Disconnect the right front combination lamp harness
connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 1
of the right front combination lamp harness connector FB10
and terminal A6 of the integrated BCM harness connector
IP75.

Low beam control

E Measure the resistance of circuit between terminal 5
of the right front combination lamp harness connector FB10
and terminal B18 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right front combination lamp harness connector

Low beam control

No Repair or replace the harness.

High beam control

Yes

Step 3 Check whether the high/low beam circuit of the right front combination lamp is shorted to ground.

GAC Motor 2023

External lighting system 1-366 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
Low beam control B Disconnect the right front combination lamp harness
connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 1
of the right front combination lamp harness connector FB10
of and the body ground.
E Measure the resistance of circuit between terminal 5
of the right front combination lamp harness connector FB10
of and the body ground.
High beam control Standard resistance: 10kΩ or higher
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the high/low beam circuit of the right front combination lamp is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector position.
B Disconnect the right front combination lamp harness
Low beam control
connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 1 of
the right front combination lamp harness connector FB10 of
and the body ground.
F Measure the voltage of circuit between terminal 5 of the
High beam control right front combination lamp harness connector FB10 and
the body ground.
Standard voltage: 0V
G Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the right front combination lamp.

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

GAC Motor 2023

Electrics (I) 1-367 External lighting system

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.4.7.11 DTC: B31A796

Diagnostic trouble code DTC definition

B31A796 Right Front Daytime Running Lamp/Position Lamp Fault

1. Circuit diagram

Instrument
panel PDU

Integrated BCM
Daytime running

Right front
combinati
lamp

on lamp

2. Diagnostic procedure

GAC Motor 2023

External lighting system 1-368 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the daytime running lamp circuit between the right front combination lamp and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Daytime running lamp B Disconnect the right front combination lamp harness
control connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 10
of the right front combination lamp harness connector FB10
and terminal B1 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Right front combination lamp harness connector

Daytime running lamp

control

No Repair or replace the harness.

Yes

Step 3 Check whether the daytime running lamp circuit of the right front combination lamp is shorted to ground.

GAC Motor 2023

Electrics (I) 1-369 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
Daytime running lamp
B Disconnect the right front combination lamp harness
control connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 10
of the right front combination lamp harness connector FB10
of and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the daytime running lamp circuit of the right front combination lamp is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
Daytime running lamp
B Disconnect the right front combination lamp harness
control connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 10 of
the right front combination lamp harness connector FB10 of
and the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the right front combination lamp.

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

GAC Motor 2023

External lighting system 1-370 Electrics (I)

Next (下一步)

Step 7 End.

1.4.7.12 DTC: B31A896

Diagnostic trouble code DTC definition

B31A896 Right Front Turn Signal Lamp Fault

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Right front
Turn signal

combinati
lamp

on lamp

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.

GAC Motor 2023

Electrics (I) 1-371 External lighting system

C Clear the DTC.

D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the turn signal lamp circuit between the right front combination lamp and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Right front turn signal B Disconnect the right front combination lamp harness
lamp control connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the right front combination lamp harness connector FB10
and terminal B5 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Right front combination lamp harness connector

No Repair or replace the harness.

Right front turn signal

lamp control

Yes

Step 3 Check whether the turn signal lamp circuit of the right front combination lamp is shorted to ground.

GAC Motor 2023

External lighting system 1-372 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector position.
B Disconnect the right front combination lamp harness
connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the right front combination lamp harness connector FB10
of and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
Right front turn signal
lamp control value.
No Repair or replace the harness.

Yes

Step 4 Check whether the turn signal lamp circuit of the right front combination lamp is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Right front combination lamp harness connector
position.
B Disconnect the right front combination lamp harness
connector FB10.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 6 of
the right front combination lamp harness connector FB10 of
and the body ground.
Right front turn signal
lamp control Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the right front combination lamp.

A Replace the right front combination lamp.

B Verify if the fault is eliminated after the right front
combination lamp is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

GAC Motor 2023

Electrics (I) 1-373 External lighting system

Next (下一步)

Step 7 End.

GAC Motor 2023

External lighting system 1-374 Electrics (I)

1.4.8 Diagnostic information and procedure (left rear combination lamp)

1.4.8.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of RLLCM without removing any part.
Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.4.8.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. And then simulate the identical or similar condition under which the symptom occurred on the
customer’s vehicle. No matter how skillful the service personnel are or how rich their experience is, they would ignore
some important things in their repair work and make some wrong determination without confirmation of the malfunction
symptom. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.4.8.3 ECU terminals
Left rear combination lamp A harness connector (BD01)

Left rear combination lamp A harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.35/orange Brake lamp power supply － －
2 0.35/white IG1 power supply － －
Turn signal lamp feedback
2 0.35/Gray － －
signal
3 0.5/red Battery power supply － －
3 0.35/pink Turn signal lamp － －
4 0.5/black GND － －
5 0.35/green ICAN-H － －
5 0.35/Purple Side marker light power supply － －
6 0.35/yellow ICAN-L － －
6 0.35/Purple Position lamp power supply － －

GAC Motor 2023

Electrics (I) 1-375 External lighting system

1.4.8.4 Data list

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.

Power supply voltage Power supply voltage 0 25.5 V

Time of failure - year 0 255 YY
Time of failure - month 1 12 MM
Time of failure - day 1 31 DD
Time of failure - hour 0 23 Hour
Time of failure _ minute 0 59 min
Time of failure _ second 0 59 s
Number of failures 0 65535 -
Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -

1.4.8.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

Low Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310816 Left Rear Combination
abnormal lamp power supply harness
Lamp A
High Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310817 Left Rear Combination
abnormal lamp power supply harness
Lamp A
Internal Fault of Left Rear There is an internal wiring
B316804 Combination Lamp A problem in the module or Replace the lamp
Module lamp
U007388 Node Off-line Bus network is abnormal Check the vehicle bus network harness
There is a wiring problem
Lost Communication with Check the headlamp connector and the
U014687 in the lamp and the vehicle
GWM vehicle bus network harness
harness
Left rear position lamp is
B31A996 There is a problem in lamp Replace the lamp
faulty
Left Rear Turn Signal
B31AA96 There is a problem in lamp Replace the lamp
Lamp Fault

1.4.8.6 DTC: B310816, B310817

Diagnostic trouble code DTC definition

B310816 Low Supply Voltage of Left Rear Combination Lamp A
B310817 High Supply Voltage of Left Rear Combination Lamp A

1. Circuit diagram

GAC Motor 2023

External lighting system 1-376 Electrics (I)

Instrument
panel PDU

Left rear combination lamp A

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

GAC Motor 2023

Electrics (I) 1-377 External lighting system

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the fuses IF58 and IF25 of the left rear combination lamp A.

A Check whether the fuses IF58 and IF25 are blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuits of the fuses IF58 and IF25.

A Check whether the circuits of fuses IF58 and IF25 are

shorted.
B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuses IF58 and IF25 are rated at 10A and 7.5A.
D Verify if the left rear combination lamp A works
normally.

Yes The system is working normally.

No

Step 5 Check the power supply circuit of the left rear combination lamp A.

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector
position.
IG1 power supply
B Disconnect the left rear combination lamp A harness
connector BD01.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminal 2/3 of
left rear combination lamp A harness connector BD01 and
the body ground.
Standard voltage: 11~14V
BAT power supply E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 6 Check the ground circuit of the left rear combination lamp A.

GAC Motor 2023

External lighting system 1-378 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector
position.
B Disconnect the left rear combination lamp A harness
connector BD01.
C Measure the resistance of circuit between terminal 4
of the left rear combination lamp A harness connector BD01
and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
GND No Repair or replace the harness.

Yes

Step 7 Replace the left rear combination lamp A.

A Replace the left rear combination lamp A.

B Verify if the fault is eliminated after the left rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.8.7 DTC: U007388

Diagnostic trouble code DTC definition

U007388 Node Off-line

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-379 External lighting system

Instrument
panel PDU

Left rear combination lamp A

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

GAC Motor 2023

External lighting system 1-380 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector
position.
B Disconnect the left rear combination lamp A harness
connector BD01.
C Measure the resistance of circuit between terminal 5 and
terminal 6 of the left rear combination lamp A harness
connector BD01.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of left rear combination lamp A.

A Check if the power and ground wires of the left rear

combination lamp A are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the left rear combination lamp A.

A Replace the left rear combination lamp A.

B Verify if the fault is eliminated after the left rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.4.8.8 DTC: B316804

Diagnostic trouble code DTC definition

B316804 Internal Fault of Left Rear Combination Lamp A Module

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-381 External lighting system

Instrument
panel PDU

Left rear combination lamp A

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground circuits of the left rear combination lamp A.

GAC Motor 2023

External lighting system 1-382 Electrics (I)

A Check whether the power and ground circuits of the left

rear combination lamp A are normal.

No Repair or replace the harness.

Yes

Step 3 Replace the left rear combination lamp A.

A Replace the left rear combination lamp A.

B Verify if the fault is eliminated after the left rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.4.8.9 DTC: U014687

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-383 External lighting system

Instrument
panel PDU

Left rear combination lamp A

Ethernet

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the left rear combination lamp A and the GWM harness
connector.

GAC Motor 2023

External lighting system 1-384 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector position.
B Disconnect the left rear combination lamp A harness
connector BD01.
C Disconnect the GWM harness connector IP63.
D Measure the resistance of circuit between terminal 5
of the left rear combination lamp A harness connector BD01
and terminal 8 of the GWM harness connector IP63.
E Measure the resistance of circuit between terminal 6
of the left rear combination lamp A harness connector BD01
and terminal 28 of the GWM harness connector IP63.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground circuits of the GWM.

A Check whether the power and ground circuits of

GWM are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the left rear combination lamp A.

GAC Motor 2023

Electrics (I) 1-385 External lighting system

A Replace the left rear combination lamp A.

B Verify if the fault is eliminated after the left rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.4.8.10 DTC: B31A996

Diagnostic trouble code DTC definition

B31A996 Left rear position lamp is faulty

1. Circuit diagram

Instrument
panel PDU

Integrated BCM
Position lamp

Left rear
combination
lamp A

2. Diagnostic procedure

GAC Motor 2023

External lighting system 1-386 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the position lamp circuit between the left rear combination lamp A and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
Left rear position lamp B Disconnect the left rear combination lamp A harness
control connector BD01.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the left rear combination lamp A harness connector BD01
and terminal B2 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Left rear combination lamp A harness connector

Position lamp control

No Repair or replace the harness.

Yes

Step 3 Check whether the left rear position lamp circuit is shorted to ground.

GAC Motor 2023

Electrics (I) 1-387 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector
position.
B Disconnect the left rear combination lamp A harness
Position lamp control connector BD01.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the harness connector BD01 of left rear combination
lamp A and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the left rear position lamp circuit is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector position.
B Disconnect the left rear combination lamp A harness
Position lamp control connector BD01.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 6 of
the left rear combination lamp A harness connector BD01
and the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the left rear combination lamp A.

A Replace the left rear combination lamp A.

B Verify if the fault is eliminated after the left rear
combination lamp A is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

GAC Motor 2023

External lighting system 1-388 Electrics (I)

Next (下一步)

Step 7 End.

1.4.8.11 DTC: B31AA96

Diagnostic trouble code DTC definition

B31AA96 Left Rear Turn Signal Lamp Fault

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Left rear
Turn signal

combination
lamp

lamp A

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.

GAC Motor 2023

Electrics (I) 1-389 External lighting system

C Clear the DTC.

D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the position lamp circuit between the left rear combination lamp A and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Left rear turn signal B Disconnect the left rear combination lamp A harness
lamp control connector BD01.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 3
of the left rear combination lamp A harness connector BD01
and terminal B4 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Left rear combination lamp A harness connector

Turn signal lamp control

No Repair or replace the harness.

Yes

Step 3 Check whether the left rear position lamp circuit is shorted to ground.

GAC Motor 2023

External lighting system 1-390 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector position.
B Disconnect the left rear combination lamp A harness
Turn signal lamp control connector BD01.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 3
of the harness connector BD01 of left rear combination
lamp A and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the left rear position lamp circuit is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Left rear combination lamp A harness connector position.
B Disconnect the left rear combination lamp A harness
Turn signal lamp control connector BD01.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 3 of
the left rear combination lamp A harness connector BD01
and the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the left rear combination lamp A.

A Replace the left rear combination lamp A.

B Verify if the fault is eliminated after the left rear
combination lamp A is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

GAC Motor 2023

Electrics (I) 1-391 External lighting system

Next (下一步)

Step 7 End.

GAC Motor 2023

External lighting system 1-392 Electrics (I)

1.4.9 Diagnostic information and procedure (right rear combination lamp)

1.4.9.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of RRLCM without removing any
part. Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.4.9.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. And then simulate the identical or similar condition under which the symptom occurred on the
customer’s vehicle. No matter how skillful the service personnel are or how rich their experience is, they would ignore
some important things in their repair work and make some wrong determination without confirmation of the malfunction
symptom. This will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.4.9.3 ECU terminals
Right rear combination lamp A harness connector (BD02)

Right rear combination lamp A harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.35/orange Brake lamp power supply － －
2 0.35/white IG1 power supply － －
Turn signal lamp feedback
2 0.35/Gray － －
signal
3 0.5/red Battery power supply
3 0.35/red Turn signal lamp － －
4 0.5/black GND － －
5 0.35/green ICAN-H － －
5 0.35/pink Side marker light power supply － －
6 0.35/yellow ICAN-L － －
6 0.35/pink Position lamp power supply － －

GAC Motor 2023

Electrics (I) 1-393 External lighting system

1.4.9.4 Data list

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.

Power supply voltage Power supply voltage 0 25.5 V

Time of failure - year 0 255 YY
Time of failure - month 1 12 MM
Time of failure - day 1 31 DD
Time of failure - hour 0 23 Hour
Time of failure _ minute 0 59 min
Time of failure _ second 0 59 s
Number of failures 0 65535 -
Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -

1.4.9.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

U007388 Node Off-line Bus network is abnormal Check the vehicle bus network harness
There is a wiring problem
Lost Communication with Check the headlamp connector and the
U014687 in the lamp and the
GWM vehicle bus network harness
vehicle harness
Low Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310A16 Right Rear Combination
abnormal lamp power supply harness
Lamp A
High Supply Voltage of
The lamp power supply is Check the headlamp connector and the
B310A17 Right Rear Combination
abnormal lamp power supply harness
Lamp A
Internal Fault of Right There is an internal wiring
B316A04 Rear Combination Lamp problem in the module or Replace the lamp
B Module lamp
Right rear position lamp There is a problem in
B31AB96 Replace the lamp
is faulty lamp
Right Rear Turn Signal There is a problem in
B31AC96 Replace the lamp
Lamp Fault lamp

1.4.9.6 DTC: B310A16, B310A17

Diagnostic trouble code DTC definition

B310A16 Low Supply Voltage of Right Rear Combination Lamp A
B310A17 High Supply Voltage of Right Rear Combination Lamp A

1. Circuit diagram

GAC Motor 2023

External lighting system 1-394 Electrics (I)

Instrument
panel PDU

Right rear combination lamp

A

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

GAC Motor 2023

Electrics (I) 1-395 External lighting system

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the right rear combination lamp A fuses IF57 and IF25.

A Check whether the fuses IF57 and IF25 are blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuits of the fuses IF57 and IF25.

A Check whether the circuits of fuses IF57 and IF25 are

shorted.
B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuses IF57 and IF25 are rated at 10A and 7.5A.
D Verify if the right rear combination lamp A works
normally.

Yes The system is working normally.

No

Step 5 Check the power supply circuit of the right rear combination lamp A.

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector
position.
IG1 power supply B Disconnect the right rear combination lamp A harness
connector BD02.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminal 2/3 of
the right rear combination lamp A harness connector BD02
and the body ground.
Standard voltage: 11~14V
BAT power supply E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 6 Check the ground circuit of the right rear combination lamp A.

GAC Motor 2023

External lighting system 1-396 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector
position.
B Disconnect the right rear combination lamp A harness
connector BD02.
C Measure the resistance of circuit between terminal 4
of the right rear combination lamp A harness connector
BD02 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
GND
No Repair or replace the harness.

Yes

Step 7 Replace the right rear combination lamp A.

A Replace the right rear combination lamp A.

B Verify if the fault is eliminated after the right rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.4.9.7 DTC: U007388

Diagnostic trouble code DTC definition

U007388 Node Off-line

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-397 External lighting system

Instrument
panel PDU

Right rear combination lamp

A

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

GAC Motor 2023

External lighting system 1-398 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector position.
B Disconnect the right rear combination lamp A harness
connector BD02.
C Measure the resistance of circuit between terminal 5 and
terminal 6 of the right rear combination lamp A harness
connector BD02.
D Standard resistance: about 120Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of the right rear combination lamp A.

A Check if the power and ground wires of the right rear

combination lamp A are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the right rear combination lamp A.

A Replace the right rear combination lamp A.

B Verify if the fault is eliminated after the right rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.4.9.8 DTC: B316A04

Diagnostic trouble code DTC definition

B316A04 Internal Fault of Right Rear Combination Lamp B Module

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-399 External lighting system

Instrument
panel PDU

Right rear combination lamp

A

Refer to I-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground circuits of the right rear combination lamp A.

GAC Motor 2023

External lighting system 1-400 Electrics (I)

A Check whether the power and ground circuits of the right

rear combination lamp A are normal.

No Repair or replace the harness.

Yes

Step 3 Replace the right rear combination lamp A.

A Replace the right rear combination lamp A.

B Verify if the fault is eliminated after the right rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.4.9.9 DTC: U014687

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-401 External lighting system

Instrument
panel PDU

Right rear combination lamp

A

Ethernet

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the right rear combination lamp A and the GWM harness
connector.

GAC Motor 2023

External lighting system 1-402 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector
position.
B Disconnect the right rear combination lamp A harness
connector BD02.
C Disconnect the GWM harness connector IP63.
D Measure the resistance of circuit between terminal 5
of the right rear combination lamp A harness connector
BD02 and terminal 8 of the GWM harness connector IP63.
E Measure the resistance of circuit between terminal 6
of the right rear combination lamp A harness connector
BD02 and terminal 28 of the GWM harness connector IP63.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground circuits of the GWM.

A Check whether the power and ground circuits of

GWM are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the right rear combination lamp A.

GAC Motor 2023

Electrics (I) 1-403 External lighting system

A Replace the right rear combination lamp A.

B Verify if the fault is eliminated after the right rear
combination lamp A is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.4.9.10 DTC: B31AB96

Diagnostic trouble code DTC definition

B31AB96 Right rear position lamp is faulty

1. Circuit diagram

Instrument
panel PDU

Integrated BCM
Position lamp

Right rear
combination
lamp A

2. Diagnostic procedure

GAC Motor 2023

External lighting system 1-404 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the position lamp circuit between the right rear combination lamp A and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Right rear position lamp B Disconnect the right rear combination lamp A harness
control connector BD02.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 6
of the right rear combination lamp A harness connector
BD02 and terminal B7 of the integrated BCM harness
connector IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Right rear combination lamp A harness connector

Position lamp control

No Repair or replace the harness.

Yes

Step 3 Check whether the right rear position lamp circuit is shorted to ground.

GAC Motor 2023

Electrics (I) 1-405 External lighting system

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector
position.
B Disconnect the right rear combination lamp A harness
Position lamp control connector BD02.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance between terminal 6 of the
harness connector BD02 of right rear combination lamp A
and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the right rear position lamp circuit is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector position.
B Disconnect the right rear combination lamp A harness
Position lamp control connector BD02.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 6 of
the right rear combination lamp A harness connector BD02
and the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the right rear combination lamp A.

A Replace the right rear combination lamp A.

B Verify if the fault is eliminated after the right rear
combination lamp A is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

GAC Motor 2023

External lighting system 1-406 Electrics (I)

Next (下一步)

Step 7 End.

1.4.9.11 DTC: B31AC96

Diagnostic trouble code DTC definition

B31AC96 Right Rear Turn Signal Lamp Fault

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Right rear
Turn signal

combination
lamp

lamp A

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.

GAC Motor 2023

Electrics (I) 1-407 External lighting system

C Clear the DTC.

D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the position lamp circuit between the right rear combination lamp A and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.

Right rear turn signal B Disconnect the right rear combination lamp A harness
lamp control connector BD02.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 3
of the right rear combination lamp A harness connector
BD02 and terminal B5 of the integrated BCM harness
connector IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Right rear combination lamp A harness connector

Turn signal lamp control

No Repair or replace the harness.

Yes

Step 3 Check whether the right rear position lamp circuit is shorted to ground.

GAC Motor 2023

External lighting system 1-408 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector position.
B Disconnect the right rear combination lamp A harness
Turn signal lamp control connector BD02.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance between terminal 3 of the
harness connector BD02 of right rear combination lamp A
and the body ground.
Standard resistance: 10kΩ or higher
E Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 4 Check whether the right rear position lamp circuit is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Right rear combination lamp A harness connector
position.
B Disconnect the right rear combination lamp A harness
Turn signal lamp control connector BD02.
C Disconnect the integrated BCM harness connector
IP75.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 3 of
the right rear combination lamp A harness connector BD02
and the body ground.
Standard voltage: 0V
F Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

Yes

Step 5 Replace the right rear combination lamp A.

A Replace the right rear combination lamp A.

B Verify if the fault is eliminated after the right rear
combination lamp A is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

GAC Motor 2023

Electrics (I) 1-409 External lighting system

Next (下一步)

Step 7 End.

GAC Motor 2023

External lighting system 1-410 Electrics (I)

1.4.10 Removal and installation

1.4.10.1 Removing and installing front combination
lamp
Removal procedure
Note:
This section describes the removal and installation of left
front combination lamp, and the right front combination
lamp may be removed and installed by reference to left
one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the front bumper assembly. Refer to
Maintenance Manual - Body, HVAC

4 Remove the front combination lamp

a. Disconnect the connector of the front combination lamp
as arrowed.

GAC Motor 2023

Electrics (I) 1-411 External lighting system

b. Unscrew the fixing screws (arrow A) and fixing bolts

(arrow B) of the front combination lamp ①.
• Tightening torque of bolt (arrow B): 6±1N·m

c. Unscrew the fixing bolt as arrowed, and remove the front

combination lamp ①.
• Tightening torque of bolt: 6±1N·m

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, perform the function test of the front
combination lamp.
– Adjust the lamp if necessary. Refer to 1.4.10.2 Adjusting
front combination lamp
1.4.10.2 Adjust the front combination lamp
Adjustment procedure
Note:
Adjust the headlamps in accordance with local laws.
1 Adjust the front combination lamp
Adjust the front combination lamp. Refer to Maintenance
Manual - Maintenance

GAC Motor 2023

External lighting system 1-412 Electrics (I)

1.4.10.3 Removing and installing reverse lamp

Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Lift the vehicle.
4 Remove the reverse lamp
a. Disconnect the reverse lamp connector (arrow A).
b. Unscrew the fixing screws (arrow B), and take out the
reverse lamp ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, check whether the reverse lamp works
normally.
1.4.10.4 Removing and installing rear fog lamp
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Lift the vehicle.
4 Remove the rear fog lamp
a. Disconnect the rear fog lamp connector (arrow A).
b. Unscrew the fixing screws (arrow B), and take out the
rear fog lamp ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, check whether the rear fog lamp works
normally.

GAC Motor 2023

Electrics (I) 1-413 External lighting system

1.4.10.5 Removing and installing instrument panel

switch block - right
Removal procedure
1 Remove the touch screen. Refer to 1.2.7.2 Removing
and installing touch screen
2 Remove the steering column upper shroud assembly.
Refer to Maintenance Manual - Body, HVAC
3 Remove the console body assembly. Refer to
Maintenance Manual - Body, HVAC
4 Remove the instrument panel lower body assembly.
Please refer to Maintenance Manual - Body, HVAC
5 Remove the central air outlet assembly of instrument
panel. Refer to Maintenance Manual - Body and
HVAC

6 Remove the instrument panel switch block - right

a. Undo the fixing clip as arrowed, and remove the
instrument panel switch block - right①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the
instrument panel switch block - right.

GAC Motor 2023

External lighting system 1-414 Electrics (I)

1.4.10.6 Removing and installing rear combination

lamp A assembly
Removal procedure
Note:
This section describes the removal and installation of the
left rear combination lamp A assembly, and the right rear
combination lamp A assembly may be removed and
installed by reference to left one.
1 Open the PLG.
2 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
3 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)

4 Remove the rear combination lamp A assembly

a. Remove the rear combination lamp A assembly access
cover ① as arrowed.

b. Disconnect the connector (arrow A) of the rear

combination lamp A assembly.
c. Undo the harness sealing plug (arrow B).
d. Unscrew the fixing nut (arrow C) of the rear combination
lamp A assembly.
• Tightening torque of nut (arrow C): 5±1N·m

GAC Motor 2023

Electrics (I) 1-415 External lighting system

e. Detach the bolt plug of the rear combination lamp A

assembly as arrowed.

f. Unscrew the fixing bolt (arrow A) of the rear combination

lamp A assembly.
g. Remove the rear combination lamp A assembly ①
(arrow B).
• Tightening torque of bolt (arrow A): 5±1N.m

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, check whether all the lamps of the rear
combination lamp A assembly work normally.

GAC Motor 2023

External lighting system 1-416 Electrics (I)

1.4.10.7 Removing and installing exterior rearview

mirror turn signal lamp
Removal procedure
Note:
This section describes the removal and installation of left
exterior rearview mirror turn lamp, and the right exterior
rearview mirror turn lamp may be removed and installed by
reference to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the mirror lens assembly. Refer to1.6.6.1
Removing and installing mirror lens assembly
4 Remove the exterior rearview mirror turn signal lamp
a. Unscrew the fixing screws of the exterior rearview mirror
frame as arrowed.

b. Undo the fixing clips as arrowed, and remove the exterior

rearview mirror frame ①.

c. Undo the fixing clips as arrowed, and remove the exterior

rearview mirror cover ①.

GAC Motor 2023

Electrics (I) 1-417 External lighting system

d. Disconnect the connector as arrowed, and take out the

exterior rearview mirror cover ①.

e. Unscrew the fixing screw (arrow A) of the exterior

rearview mirror turn signal lamp.
f. Undo the fixing clips (arrows B and C), and remove the
exterior rearview mirror turn signal lamp ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the
exterior rearview mirror.

GAC Motor 2023

External lighting system 1-418 Electrics (I)

1.4.10.8 Removing and installing lamplight

combination switch
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the steering column lower shroud assembly.
Refer to Maintenance Manual - Body, HVAC

4 Remove the lamplight combination switch

a. Disconnect the connector of the lamplight combination
switch (arrow A).
b. Press the fixing clip (arrow B), and remove the lamplight
combination switch ① (arrow C).

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether each position of the
lamplight combination switch functions normally.

GAC Motor 2023

Electrics (I) 1-419 External lighting system

1.4.10.9 Removing and installing combination switch

and clock spring assembly
Removal procedure
1 Remove the steering wheel assembly. Refer to
Maintenance Manual - Chassis
2 Remove the steering column lower shroud assembly.
Refer to Maintenance Manual - Body, HVAC

3 Remove the combination switch and clock spring

assembly
a. Disconnect the connectors (arrows A, B, C and D) of
the combination switch and clock spring assembly.

b. Unscrew the fixing screw (arrow A) of the combination

switch and clock spring assembly.
c. Undo the fixing clip (arrow B), and remove the
combination switch and clock spring assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, adjust the clock spring. Refer to
1.4.10.11 Adjusting clock spring

GAC Motor 2023

External lighting system 1-420 Electrics (I)

1.4.10.10 Removing and installing clock spring

assembly
Removal procedure
1 Remove the driver's airbag. Refer to Maintenance
Manual - Electrics (III)
2 Remove the steering wheel assembly. Refer to
Maintenance Manual - Chassis
3 Remove the steering column lower shroud assembly.
Refer to Maintenance Manual - Body, HVAC

4 Remove the clock spring assembly

a. Disconnect the clock spring assembly connectors
(arrows A and B).

b. Unscrew the fixing screw as arrowed, and remove the

clock spring assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– During the installation of clock spring assembly, it is
necessary to adjust the clock spring. Refer to 1.4.10.11
Adjusting clock spring

GAC Motor 2023

Electrics (I) 1-421 External lighting system

1.4.10.11 Adjusting clock spring

Adjust the clock spring
Note:
The clock spring must be readjusted during installation of
the steering wheel assembly.

1 Adjust the clock spring

a. Follow the warning information indicated on the clock
spring: when re-aligning the center, turn the clock spring
clockwise to the end, and then turn it back for 2.1 turns. In
this case, ▲ and ▼ are aligned, and the clock spring cable
① is found on the transparent neutral window. At this time,
the adjustment ends.
Caution
Failure to follow these instructions may affect the normal
function of the SRS and harm the driver.

GAC Motor 2023

External lighting system 1-422 Electrics (I)

1.4.10.12 Removing and installing instrument panel

switch block
Removal procedure
1 Remove the touch screen. Refer to 1.2.7.2 Removing
and installing touch screen
2 Remove the instrument cluster shield and the steering
column upper shroud assembly. Refer to
Maintenance Manual - Body, HVAC
3 Remove the console body assembly. Refer to
Maintenance Manual - Body, HVAC
4 Remove the instrument panel lower body assembly.
Please refer to Maintenance Manual - Body, HVAC
5 Remove the central air outlet assembly of instrument
panel. Refer to Maintenance Manual - Body and
HVAC

6 Remove the instrument panel switch block

a. Undo the fixing clip as arrowed, and remove the
instrument panel switch block ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After installation, perform the function test of the
instrument panel switch block.

GAC Motor 2023

Electrics (I) 1-423 External lighting system

1.4.10.13 Removing and installing left instrument panel

switch block assembly
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the left instrument panel switch block
assembly
a. Detach the fixing clips as arrowed, and remove the left
instrument panel switch block assembly ①.

b. Disconnect the connectors (arrows A and B), and take

out the left instrument panel switch block assembly ①.

c. Undo the fixing clips as arrowed, and detach the exterior

rearview mirror adjusting switch ① and the left instrument
panel switch block assembly ②.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
-After installation, perform the function test of the exterior
rearview mirror adjusting switch and left instrument panel
switch block assembly.

GAC Motor 2023

External lighting system 1-424 Electrics (I)

1.4.10.14 Removing and installing hazard warning lamp

switch
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the upper trim panel assembly of the
console. Refer to Maintenance Manual - Body, HVAC

4 Remove the hazard warning lamp switch

a. Press the fixing clips as arrowed, and remove the hazard
warning lamp switch ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After installation, perform the function test of the hazard
warning lamp switch.

GAC Motor 2023

Electrics (I) 1-425 External lighting system

1.4.10.15 Removing and installing retro-reflector

Removal procedure
Note:
This section describes the removal and installation of left
retro-reflector, and the right retro-reflector may be removed
and installed by reference to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the rear bumper assembly. Refer to
Maintenance Manual - Body, HVAC

4 Remove the retro-reflectora. Disconnect the APA

radar sensor connector (arrow A).
b. Undo the fixing clip (arrow B), and remove the APA radar
sensor ①.

c. Unscrew the fixing screw as arrowed, and remove the

APA radar sensor bracket ①.

GAC Motor 2023

External lighting system 1-426 Electrics (I)

d. Unscrew the fixing screw of the reflex reflector (arrow A).

e. Undo the fixing clip of the reflex reflector (arrow B).

f. Remove the reflex reflector ①.

Installation procedure
The installation procedure is in reverse of removal
procedure.
1.4.10.16 Removing and installing license plate lamp
Removal procedure
Note:
The license plate lamp can be removed and installed by
reference to the removal and installation of the rear license
plate trim panel assembly.
1 Remove the license plate lamp
a. Remove the rear license plate trim panel assembly.
Refer to Maintenance Manual - Body, HVAC
1.4.10.17 Removing and installing instrument panel
switch block - left
Removal procedure
Note:
The instrument panel switch block (left) can be removed
and installed by reference to the removal and installation of
the instrument cluster shield and the steering column upper
shroud assembly.
1 Remove the instrument cluster shield and the steering
column upper shroud assembly. Refer to
Maintenance Manual - Body, HVAC

GAC Motor 2023

Electrics (I) 1-427 External lighting system

1.4.10.18 Removing and installing front combination

lamp control unit
Removal procedure
Note:
This section describes the removal and installation of the
left front combination lamp control unit, and the right front
combination lamp control unit may be removed and
installed by reference to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the front bumper assembly. Refer to
Maintenance Manual - Body, HVAC
4 Remove the front combination lamp. Refer to 1.4.10.1
Removing and installing front combination lamp

5 Remove the front combination lamp control unit

a. Unscrew the fixing screws as arrowed, and remove the
front combination lamp control unit ①.

b. Disconnect the connector as arrowed, and take out the

front combination lamp control unit ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, perform the function test of the front
combination lamp control unit.

GAC Motor 2023

Internal lighting system 1-428 Electrics (I)

1.5 Internal lighting system

1.5.1 System description
1.5.1.1 System composition
The internal lighting system mainly includes:
– Front dome lamp
– Rear dome lamp
– Left/right rear dome lamp
– Trunk lamp
1.5.1.2 Function description of internal lighting system
Interior lamps
Function description:
1 Door status-sensing dome lamp on/off: When any of the four doors is opened, the dome lamp will stay on.
2 Power status-sensing dome lamp on/off: When the ENGINE START/STOP button is turned from “ON” position to
“OFF” position, the dome lamp will stay on for 30 s.
3 Automatic on and off with remote control: If the ENGINE START/STOP button is in "OFF" position and the doors are
unlocked by remote control, the dome lamp will come on and then go out after about 30 s.
4 Trunk lamp on/off: When the trunk lid is opened, the trunk lamp will be turned on.
Backlight
Function description:
1 Manual on/off: With control logic the same as the clearance lamp.
2 Brightness adjustment: The adjustment can be made through “Setting→Screen Settings→Instrument→Instrument
Brightness” on the touch screen with the clearance lamp on.

GAC Motor 2023

Electrics (I) 1-429 Internal lighting system

1.5.2 Location of components

1.5.2.1 Location of components

Front roof lamp assembly

Left rear dome lamp

Rear dome
lamp

Right rear dome lamp

GAC Motor 2023

Internal lighting system 1-430 Electrics (I)

1.5.3 Electrical schematic diagram

1.5.3.1 Electrical schematic diagram

To BAT power supply

ECO output
power
Front dome lamp
To IG1 power supply

To ACC power supply

Door signal
Left front door lock motor
(status switch)
Rear dome lamp

Right front door lock motor Left rear dome lamp

BCM

(status switch)

Right rear dome lamp

Left rear door lock motor

(status switch)

Door signal
Right rear door lock motor
(status switch)

Liftgate lock assembly

Trunk lamp

GAC Motor 2023

Electrics (I) 1-431 Internal lighting system

1.5.4 Diagnostic information and procedure

1.5.4.1 Diagnostic instructions
Familiarize yourself with the system functions and operations before starting the system diagnosis. This helps correctly
determine the diagnostic procedure when a fault occurs, and more importantly, helps determine whether the situation
described by the customer is normal.
1.5.4.2 Visual inspection
• Check the aftermarket parts that may affect the operation of the internal lighting system.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• If only one lamp fails to work, check and repair the poor contact or open circuit at the power supply or ground circuit
before replacing the bulb.
1.5.4.3 Front reading lamp (in ON position) failure to work
1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Front Right Left rear

dome rear dome lamp
lamp dome
lamp

2. Diagnostic procedure

GAC Motor 2023

Internal lighting system 1-432 Electrics (I)

Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the front dome lamp.

A Check whether the front dome lamp is burned out or

damaged.

Yes Replace the front dome lamp assembly.

No

Step 2 Check the circuit between the front dome lamp assembly and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector
position.
Dome lamp power B Disconnect the integrated BCM harness connector
supply
IP75.
C Disconnect the front dome lamp assembly harness
connector BD96.
D Measure the resistance of circuit between terminal 20
of the front dome lamp assembly harness connector BD96
and terminal B14 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Replace or repair the harness or

connector.

Interior lamp power

supply

Yes

Step 3 Check the ground circuit of the front dome lamp assembly.

GAC Motor 2023

Electrics (I) 1-433 Internal lighting system

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector position.
GND B Disconnect the front dome lamp assembly harness
connector BD96.
C Measure the resistance of circuit between terminals 5
and 17 of the front dome lamp assembly harness connector
BD96 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

GND No Replace or repair the harness or

connector.

Yes

Step 4 Replace the front dome lamp assembly.

A Replace the front dome lamp assembly.

B Verify if the fault is eliminated after the front dome
lamp assembly is replaced.

Yes The system is working normally.

No

Step 5 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.5.4.4 Front reading lamp (in DOOR position) failure to work

1. Circuit diagram

GAC Motor 2023

Internal lighting system 1-434 Electrics (I)

Instrument
panel PDU

Integrated BCM

Front Right Left rear

dome rear dome lamp
lamp dome
lamp

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the front dome lamp.

A Check whether the front dome lamp is burned out or

damaged.

Yes Replace the front dome lamp assembly.

No

Step 2 Check the trigger signal of the door jamb switch.

A Check whether the trigger signal of the door jamb

switch is normal.

GAC Motor 2023

Electrics (I) 1-435 Internal lighting system

No Repair the harness or replace the door lock

assembly.

Yes

Step 3 Check the door control signal circuit of the dome lamp.

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector
position.
Door status signal B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the front dome lamp assembly harness
connector BD96.
D Measure the resistance of circuit between terminal 18
of the front dome lamp assembly harness connector BD96
and terminal B9 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Replace or repair the harness or

connector.

Door status signal

Yes

Step 4 Check the power supply circuit of the front dome lamp assembly.

GAC Motor 2023

Internal lighting system 1-436 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector
position.
Dome lamp power B Disconnect the integrated BCM harness connector
supply
IP75.
C Disconnect the front dome lamp assembly harness
connector BD96.
D Measure the resistance of circuit between terminal 20
of the front dome lamp assembly harness connector BD96
and terminal B14 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Replace or repair the harness or

connector.

Interior lamp power

supply

Yes

Step 5 Check the ground circuit of the front dome lamp assembly.

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector
position.
GND B Disconnect the front dome lamp assembly harness
connector BD96.
C Measure the resistance of circuit between terminals 5
and 17 of the front dome lamp assembly harness connector
BD96 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

GND No Replace or repair the harness or

connector.

Yes

Step 6 Replace the front dome lamp assembly.

GAC Motor 2023

Electrics (I) 1-437 Internal lighting system

A Replace the front dome lamp assembly.

B Verify if the fault is eliminated after the front dome
lamp assembly is replaced.

Yes The system is working normally.

No

Step 7 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.5.4.5 2nd-row dome lamp (in ON position) failure to work

1. Circuit diagram

GAC Motor 2023

Internal lighting system 1-438 Electrics (I)

Instrument
panel PDU

Integrated BCM

Front Right Left rear

dome rear dome lamp
lamp dome
lamp

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the 2nd-row dome lamp.

A Check whether the 2nd-row dome lamp is burned out

or damaged.

Yes Replace the 2nd-row left and right dome

lamps.

No

Step 2 Check the power supply circuit between the 2nd-row dome lamp and the integrated BCM.

GAC Motor 2023

Electrics (I) 1-439 Internal lighting system

A Set the ENGINE START/STOP button to “OFF”

Right rear dome lamp harness connector
position.
power supply B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the 2nd-row left dome lamp harness
connector BD93.
D Disconnect the 2nd-row right dome lamp harness
connector BD92.
E Measure the resistance of circuit between terminal 1
of the 2nd-row left dome lamp harness connector BD93
and terminal B14 of the integrated BCM harness connector
IP75.
F Measure the resistance of circuit between terminal 1
of the 2nd-row right dome lamp harness connector BD92
and terminal B14 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Left rear dome lamp harness connector

power supply

No Repair or replace the harness or

connector.
Integrated BCM harness connector

Interior lamp power

supply

Yes

Step 3 Check the ground circuit of the 2nd-row dome lamp.

GAC Motor 2023

Internal lighting system 1-440 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Left rear dome lamp harness connector position.
GND B Disconnect the 2nd-row left dome lamp harness
connector BD93.
C Disconnect the 2nd-row right dome lamp harness
connector BD92.
D Measure the resistance of circuit between terminal 3
of the 2nd-row left dome lamp harness connector BD93
and the body ground.
E Measure the resistance of circuit between terminal 3
of the 2nd-row right dome lamp harness connector BD92
and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right rear dome lamp harness connector

GND

No Repair or replace the harness or

connector.

Yes

Step 4 Replace the 2nd-row left and right dome lamps.

A Replace the 2nd-row left and right dome lamps.

B Verify if the fault is eliminated after the 2nd-row left
and right dome lamps are replaced.

Yes The system is working normally.

No

Step 5 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

GAC Motor 2023

Electrics (I) 1-441 Internal lighting system

1.5.4.6 2nd-row dome lamp (in DOOR position) failure to work

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Front Right Left rear

dome rear dome lamp
lamp dome
lamp

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the 2nd-row dome lamp.

A Check whether the 2nd-row dome lamp is burned out

or damaged.

Yes Replace the 2nd-row left and right dome

lamps.

No

Step 2 Check the trigger signal of the door jamb switch.

GAC Motor 2023

Internal lighting system 1-442 Electrics (I)

A Check whether the trigger signal of the door jamb

switch is normal.

No Repair the harness or replace the door lock

assembly.

Yes

Step 3 Check the door control signal circuit of the dome lamp.

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector position.
Door status signal B Disconnect the integrated BCM harness connector
IP75.
C Disconnect the front dome lamp assembly harness
connector BD96.
D Measure the resistance of circuit between terminal 18
of the front dome lamp assembly harness connector BD96
and terminal B9 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Replace or repair the harness or

connector.

Door status signal

Yes

Step 4 Check the control circuit between the 2nd-row dome lamp and the front dome lamp.

GAC Motor 2023

Electrics (I) 1-443 Internal lighting system

A Set the ENGINE START/STOP button to “OFF”

Left rear dome lamp harness connector position.
Front dome lamp control B Disconnect the 2nd-row left dome lamp harness
signal connector BD93.
C Disconnect the 2nd-row right dome lamp harness
connector BD92.
D Disconnect the front dome lamp assembly harness
connector BD96.
E Measure the resistance of circuit between terminal 2
of the 2nd-row left dome lamp harness connector BD93
and terminal 21 of the front dome lamp assembly harness
connector BD96.
F Measure the resistance of circuit between terminal 2
of the 2nd-row right dome lamp harness connector BD92
and terminal 21 of the front dome lamp assembly harness
connector BD96.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Right rear dome lamp harness connector

Front dome lamp control

signal

No Repair or replace the harness or

connector.
Front dome lamp assembly harness connector

Rear dome lamp control

Yes

Step 5 Check the power supply circuit between the 2nd-row dome lamp and the integrated BCM.

GAC Motor 2023

Internal lighting system 1-444 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Right rear dome lamp harness connector position.

power supply B Disconnect the integrated BCM harness connector

IP75.
C Disconnect the 2nd-row left dome lamp harness
connector BD93.
D Disconnect the 2nd-row right dome lamp harness
connector BD92.
E Measure the resistance of circuit between terminal 1
of the 2nd-row left dome lamp harness connector BD93
and terminal B14 of the integrated BCM harness connector
IP75.
F Measure the resistance of circuit between terminal 1
of the 2nd-row right dome lamp harness connector BD92
and terminal B14 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

Left rear dome lamp harness connector

power supply

No Repair or replace the harness or

connector.
Integrated BCM harness connector

Interior lamp power

supply

Yes

Step 6 Check the ground circuit of the 2nd-row dome lamp.

GAC Motor 2023

Electrics (I) 1-445 Internal lighting system

A Set the ENGINE START/STOP button to “OFF”

Left rear dome lamp harness connector position.
B Disconnect the 2nd-row left dome lamp harness
GND
connector BD93.
C Disconnect the 2nd-row right dome lamp harness
connector BD92.
D Measure the resistance of circuit between terminal 3
of the 2nd-row left dome lamp harness connector BD93
and the body ground.
E Measure the resistance of circuit between terminal 3
of the 2nd-row right dome lamp harness connector BD92
and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right rear dome lamp harness connector

GND

No Repair or replace the harness or

connector.

Yes

Step 7 Replace the 2nd-row left and right dome lamps.

A Replace the 2nd-row left and right dome lamps.

B Verify if the fault is eliminated after the 2nd-row left
and right dome lamps are replaced.
Yes The system is working normally.

No

Step 8 Replace the front dome lamp assembly.

A Replace the front dome lamp assembly.

B Verify if the fault is eliminated after the front dome
lamp assembly is replaced.
Yes The system is working normally.

No

Step 9 Replace the integrated BCM.

GAC Motor 2023

Internal lighting system 1-446 Electrics (I)

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 10 End.

1.5.4.7 Trunk lamp failure to work

1. Circuit diagram

Instrument
panel PDU

Integrated BCM

Trunk lamp

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-447 Internal lighting system

Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the trunk lamp.

A Check whether the trunk lamp is burned out or

damaged.

Yes Replace the trunk lamp.

No

Step 2 Check the liftgate lock status switch signal.

A Check whether the liftgate lock status switch signal is

normal.

No Repair the harness or replace the liftgate

lock assembly.

Yes

Step 3 Check the circuit between the trunk lamp and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.

Trunk lamp power supply B Disconnect the integrated BCM harness connector
IP01.
C Disconnect the trunk lamp harness connector BD29.
D Measure the resistance of circuit between terminal 18
of the integrated BCM harness connector IP01 and terminal
2 of the trunk lamp harness connector BD29.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Trunk lamp harness connector

power supply

No Replace or repair the harness or

connector.

GAC Motor 2023

Internal lighting system 1-448 Electrics (I)

Yes

Step 4 Check the ground circuit of the trunk lamp.

A Set the ENGINE START/STOP button to “OFF”

Trunk lamp harness connector
position.
GND B Disconnect the trunk lamp harness connector BD29.
C Measure the resistance of circuit between terminal 1
of the trunk lamp harness connector BD29 and the body
ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

connector.

Yes

Step 5 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

GAC Motor 2023

Electrics (I) 1-449 Internal lighting system

1.5.5 Removal and installation

1.5.5.1 Removing and installing front dome lamp
assembly
Removal procedure
Note:
The front dome lamp uses LED bulbs. If either of them is to
be replaced, they must be replaced as a whole.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)

3 Remove the front dome lamp assembly

a. Detach the roof assembly ① as arrowed.
Note:
This step applies to the model with panoramic canopy only.

GAC Motor 2023

Internal lighting system 1-450 Electrics (I)

b. Undo the fixing clips as arrowed, and remove the front

dome lamp assembly ①.

c. Disconnect the connector as arrowed, and take out

the front dome lamp assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– Before the installation, check the fixing clips for damage
and renew them if necessary.
– After the installation, perform the function test of the front
dome lamp assembly.

GAC Motor 2023

Electrics (I) 1-451 Internal lighting system

1.5.5.2 Removing and installing rear dome lamp

(panoramic canopy)
Removal procedure
Note:
This section describes the removal and installation of left
rear dome lamp, and the right rear dome lamp may be
removed and installed by reference to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the roof handle assembly (rear). Refer to
Maintenance Manual - Body, HVAC

4 Remove the rear dome lamp

a. Undo the fixing clips as arrowed, and remove the rear
dome lamp ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether the rear dome lamp
works normally.

GAC Motor 2023

Internal lighting system 1-452 Electrics (I)

1.5.5.3 Removing and installing trunk lamp

Removal procedure
1 Open the PLG.
2 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
3 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)

4 Remove the trunk lamp

a. Undo the fixing clip as arrowed, and remove the trunk
lamp ①.

b. Disconnect the connector as arrowed, and take out

the trunk lamp ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether the trunk lamp works
normally.

GAC Motor 2023

Electrics (I) 1-453 Internal lighting system

1.5.5.4 Removing and installing rear dome lamp

Removal procedure
Note:
The rear dome lamp assembly uses LED bulbs. If either of
them is to be replaced, they must be replaced as a whole.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)

3 Remove the rear dome lamp

a. Undo the fixing clip as arrowed, and remove the rear
dome lamp ①.

b. Disconnect the connector as arrowed, and take out

the rear dome lamp ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the rear
dome lamp.

GAC Motor 2023

Rearview mirror 1-454 Electrics (I)

1.6 Rearview mirrors

1.6.1 Specifications
1.6.1.1 Fastener specifications

Location Specification Tightening torque:Nm

Hexagon flange nut M6
Left/right exterior rearview mirror
Hexagon head bolt and plain washer 8±2
assembly
assembly M6×20
Screw with special-shaped spring
Interior rearview mirror assembly 5±0.5
washer M8×14

GAC Motor 2023

Electrics (I) 1-455 Rearview mirror

1.6.2 System description

1.6.2.1 System description
System overview
Rearview mirrors include interior rearview mirror and exterior rearview mirrors, which are respectively fixed on the top
middle of the front windshield and on the left/right outer sides of the body for observing the conditions inside the
compartment and behind the vehicle. The exterior rearview mirror can be easily adjusted in the vehicle, and the drivers
can adjust the field of view to suit their own needs.
Function and operation of exterior rearview mirror
Electric adjustment of exterior rearview mirrors
– The exterior rearview mirror lens can be adjusted to an angle by operating the exterior rearview mirror adjustment switch,
including vertical adjustment and horizontal adjustment.
– Before adjusting the left exterior rearview mirror lens, set the ignition switch to “ACC” or “ON”, press the “L” end of the
exterior rearview mirror adjusting switch, and then move the exterior rearview mirror adjusting knob upward, downward,
leftward or rightward to adjust the exterior rearview mirror to the appropriate angle.
– Before adjusting the right exterior rearview mirror lens, set the ignition switch to “ACC” or “ON”, press the “R” end of the
exterior rearview mirror adjusting switch, and then move the exterior rearview mirror adjusting knob upward, downward,
leftward or rightward to adjust the exterior rearview mirror to the appropriate angle.
Heating control of exterior rearview mirror
– The heating function of the exterior rearview mirror will be enabled when the rear defrosting function is enabled through
the touch screen, and will be disabled when the rear defrosting function is disabled. Electric folding control of exterior
rearview mirror
– The left/right exterior rearview mirror can be folded or unfolded by operating the electric rearview mirror folding switch.
Automatic folding control of exterior rearview mirror
– If the vehicle is locked from outside, the exterior rearview mirror will be folded automatically.
– If the vehicle is unlocked from outside, the exterior rearview mirror will be unfolded automatically.
This function can be activated or deactivated by selecting "Settings → Body Accessories → Exterior rearview mirror →
Auto Folding of Exterior rearview Mirror” on the AV system display. Reverse tilt-down control of exterior rearview mirror
(premium model)
When the shift lever is engaged in R position, the exterior rearview mirrors will automatically turn down to the set position,
for convenient observing of the rear surrounding environment for reversing of the vehicle. When you shift out of "R"
position, the rearview mirrors will automatically return to the original position.
Memory function of exterior rearview mirror (premium model)
1. By logging in to the GAC Trumpchi application account on the AV system, a driver can automatically obtain the
associated seat and exterior rearview mirror positions, and automatically adjust the corresponding driving positions to
achieve an intelligent user experience that is adaptive to driver habits.
2. The driver adds a GAC Trumpchi account, then adjusts the seat and exterior rearview mirror to proper positions, and
operates the AV system to save the current positions.
3. When the driver logs in to the account again, the seat and exterior rearview mirror will automatically restore to the
associated driving positions.
4. If the driver manually adjusts the seat and exterior rearview mirror positions, the AV system will prompt the driver to
save the new positions or restore to the previously saved positions (if this is not necessary, just ignore the prompt). If the
driver clicks Save, the account associated position information will be automatically updated; if the driver clicks Restore,
the seat and exterior rearview mirror will automatically restore to the previously memorized positions.
Function and operation of interior rearview mirror
Automatic anti-dazzling interior rearview mirror
Automatic anti-dazzling interior rearview mirror will monitor the intensity of light from the rear traffic in real time and
automatically adjust the mirror reflection effect accordingly so as to soften the strong light to be reflected into the driver’s
eyes.
To ensure the normal function of the anti-dazzling rearview mirror sensor, do not cover the sensor with finger, cloth, etc.
Note:
Before driving, be sure to adjust the interior rearview mirror to the appropriate angle.
Hold the interior rearview mirror and adjust it up and down and left and right to the best rearview position.

GAC Motor 2023

Rearview mirror 1-456 Electrics (I)

Do not adjust the interior rearview mirror during driving, as you will be distracted from driving, causing loss of control to
vehicle and dangerous accident thereafter.
Manual anti-glare interior rearview mirror
Manually adjusting the interior rearview mirror can reduce the light reflected off the mirror surface, thus realizing the
optimal rear view.
Note:
The tab is at a rearview normal position, which can be pulled forward to offset the light reflected off the mirror surface to
achieve the anti-glare function.
Push the tab backward to return to the normal rearview angle.

GAC Motor 2023

Electrics (I) 1-457 Rearview mirror

1.6.3 Exploded view

1.6.3.1 Exploded view

Mirror lens assembly

(2 pcs in total)
Left SVM camera

Exterior rearview mirror assembly

Exterior rearview mirror adjusting switch

Left trim cover of interior rearview

mirror

Right trim cover of interior

rearview mirror

Interior rearview mirror

assembly

Interior rearview mirror

assembly

Tightening torque is measured in N•m

GAC Motor 2023

Rearview mirror 1-458 Electrics (I)

1.6.4 Electrical schematic diagram

1.6.4.1 Electrical schematic diagram

Left front door control

Rearview mirror Left rearview mirror up and
adjustment signal down/left and right
Electric rearview adjustment Left electric rearview
mirror adjusting switch module mirror
Rearview mirror Left rearview mirror
folding/unfolding switch folding/unfolding adjustment
signal
Right front door control

Right rearview mirror up and

down/left and right
Right electric rearview
module

adjustment
mirror
Right rearview mirror
folding/unfolding adjustment

GAC Motor 2023

Electrics (I) 1-459 Rearview mirror

1.6.5 Diagnostic information and procedure

1.6.5.1 Diagnostic instructions
Familiarize yourself with the system functions and operations before starting the system diagnosis. This helps correctly
determine the diagnostic procedure when a fault occurs, and more importantly, helps determine whether the situation
described by the customer is normal.
1.6.5.2 Visual inspection
• Check the aftermarket parts that may affect the normal operation of electric rearview mirror system.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
1.6.5.3 Electric rearview mirror adjustment failure
1. Circuit diagram

Instrument Instrument
panel PDU panel PDU

Exterior rearview mirror

adjusting switch

Left front door control module Right front door control

module

Horizontal Vertical Horizontal Vertical

adjustmen adjustmen adjustmen adjustmen
t motor t motor t motor t motor
Folding motor Folding motor

Left exterior rearview Right exterior rearview

mirror mirror

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the circuit between the exterior rearview mirror adjustment switch and the left front door control
module.

GAC Motor 2023

Rearview mirror 1-460 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Exterior rearview mirror adjusting switch harness
connector
position.
B Disconnect the exterior rearview mirror adjustment
Mirror adjustment GND
signal switch harness connector IP12.
C Disconnect the left front door control module harness
connector DD20.
D Measure the resistance of circuit between terminal 4
of the exterior rearview mirror adjustment switch harness
connector IP12 and terminal 8 of the left front door control
module harness connector DD20.
E Measure the resistance of circuit between terminal 5
of the exterior rearview mirror adjustment switch harness
connector IP12 and terminal 22 of the left front door control
GND Lens selection module harness connector DD20.
signal F Measure the resistance of circuit between terminal 6
of the exterior rearview mirror adjustment switch harness
connector IP12 and terminal 7 of the left front door control
module harness connector DD20.
G Measure the resistance of circuit between terminal 8
of the exterior rearview mirror adjustment switch harness
connector IP12 and terminal 22 of the left front door control
module harness connector DD20.
Standard resistance: less than 1Ω
H Verify if the resistance is consistent with the standard
value.
Left front door control module harness connector

Position selection signal of Adjustment signal of exterior

exterior rearview mirror rearview mirror adjusting
adjusting switch switch

No Repair or replace the harness.

Exterior rearview mirror

adjusting switch ground

Yes

Step 2 Check the left exterior rearview mirror adjustment circuit.

A Set the ENGINE START/STOP button to “OFF”

Left exterior rearview mirror harness connector
position.
B Disconnect the left exterior rearview mirror harness
Horizontal/vertical Horizontal adjustment
adjustment of rearview of mirror connector DD14.
mirror C Disconnect the left front door control module harness
connectors DD21 and DD22.
D Measure the resistance of circuit between terminal 1
of the left exterior rearview mirror harness connector DD14
and terminal 2 of the left front door control module harness
connector DD21.
E Measure the resistance of circuit between terminal 2
of the left exterior rearview mirror harness connector DD14
and terminal 1 of the left front door control module harness
Vertical adjustment of mirror
connector DD21.
F Measure the resistance of circuit between terminal 3
of the left exterior rearview mirror harness connector DD14
and terminal 4 of the left front door control module harness
connector DD21.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-461 Rearview mirror
Left front door control module harness connector

Vertical adjustment of left Horizontal/vertical

exterior rearview mirror adjustment of left exterior
rearview mirror

Horizontal adjustment of left

exterior rearview mirror

Yes

Step 3 Check the right exterior rearview mirror adjustment circuit.

A Set the ENGINE START/STOP button to “OFF”

Right exterior rearview mirror harness connector position.
B Disconnect the right exterior rearview mirror harness
Horizontal/vertical Horizontal adjustment
adjustment of rearview of mirror
connector PD14.
mirror C Disconnect the right front door control module
harness connector PD21.
D Measure the resistance of circuit between terminal 1
of the right exterior rearview mirror harness connector
PD14 and terminal 2 of the right front door control module
harness connector PD21.
E Measure the resistance of circuit between terminal 2
of the right exterior rearview mirror harness connector
PD14 and terminal 1 of the right front door control module
Vertical adjustment of mirror
harness connector PD21.
F Measure the resistance of circuit between terminal 3
of the right exterior rearview mirror harness connector
PD14 and terminal 4 of the right front door control module
harness connector PD21.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.
Right front door control module harness connector

Vertical adjustment of left Horizontal/vertical

exterior rearview mirror adjustment of left exterior
rearview mirror

No Repair or replace the harness.

Horizontal adjustment of left

exterior rearview mirror

Yes

Step 4 Replace the exterior rearview mirror adjusting switch.

GAC Motor 2023

Rearview mirror 1-462 Electrics (I)

A Replace the exterior rearview mirror adjustment switch.

B Verify if the fault is eliminated after the exterior rearview
mirror adjustment switch is replaced.

Yes The system is working normally.

No

Step 5 Replace the exterior rearview mirror assembly.

A Replace the exterior rearview mirror assembly.

B Verify if the fault is eliminated after the exterior rearview
mirror assembly is replaced.

Yes The system is working normally.

No

Step 6 Replace the left front door control module and right front door control module.

A Replace the left front door control module and right

front door control module.
B Verify if the fault is eliminated after the left front door
control module and the right front door control module are
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.6.5.4 Electric rearview mirror folding failure

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-463 Rearview mirror

Instrument Instrument
panel PDU panel PDU

Exterior rearview mirror

adjusting switch

Left front door control module Right front door control

module

Horizontal Vertical Horizontal Vertical

adjustmen adjustmen adjustmen adjustmen
t motor t motor t motor t motor
Folding motor Folding motor

Left exterior rearview Right exterior rearview

mirror mirror

2. Diagnostic procedure:
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the exterior rearview mirror folding signal circuit.

GAC Motor 2023

Rearview mirror 1-464 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Exterior rearview mirror adjusting switch harness
connector position.
B Disconnect the exterior rearview mirror adjustment
switch harness connector IP12.
C Disconnect the left front door control module harness
connector DD20.
D Measure the resistance of circuit between terminal 7
of the exterior rearview mirror adjustment switch harness
connector IP12 and terminal 21 of the left front door control
module harness connector DD20.
Standard resistance: less than 1Ω
Exterior rearview mirror
folding/unfolding signal
E Verify if the resistance is consistent with the standard
value.

Left front door control module harness connector

No Repair or replace the harness.

Exterior rearview mirror

folding/unfolding signal

Yes

Step 2 Replace the exterior rearview mirror adjusting switch.

A Replace the exterior rearview mirror adjustment switch.

B Verify if the fault is eliminated after the exterior rearview
mirror adjustment switch is replaced.

Yes The system is working normally.

No

Step 3 Check the control circuit of the left exterior rearview mirror folding motor.

GAC Motor 2023

Electrics (I) 1-465 Rearview mirror

A Set the ENGINE START/STOP button to “OFF”

Left exterior rearview mirror harness connector position.
B Disconnect the left exterior rearview mirror harness
Rearview mirror folding connector DD14.
C Disconnect the left front door control module harness
connector DD22.
D Measure the resistance of circuit between terminal 4
of the left exterior rearview mirror harness connector DD14
and terminal 3 of the left front door control module harness
connector DD22.
E Measure the resistance of circuit between terminal 5
of the left exterior rearview mirror harness connector DD14
Rearview mirror unfolding and terminal 4 of the left front door control module harness
connector DD22.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left front door control module harness connector

Unfolding of left exterior

rearview mirror

No Repair or replace the harness.

Folding of left exterior

rearview mirror

Yes

Step 4 Check the control circuit of the right exterior rearview mirror folding motor.

A Set the ENGINE START/STOP button to “OFF”

Right exterior rearview mirror harness connector position.
Rearview mirror folding B Disconnect the right exterior rearview mirror harness
connector PD14.
C Disconnect the right front door control module
harness connector PD22.
D Measure the resistance of circuit between terminal 4
of the right exterior rearview mirror harness connector
PD14 and terminal 3 of the right front door control module
harness connector PD22.
E Measure the resistance of circuit between terminal 5
of the right exterior rearview mirror harness connector
Rearview mirror unfolding PD14 and terminal 4 of the right front door control module
harness connector PD22.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

GAC Motor 2023

Rearview mirror 1-466 Electrics (I)

Right front door control module harness connector

Unfolding of right exterior

rearview mirror

Folding of right exterior

rearview mirror

Yes

Step 5 Replace the exterior rearview mirror assembly.

A Replace the exterior rearview mirror assembly.

B Verify if the fault is eliminated after the exterior
rearview mirror assembly is replaced.

Yes The system is working normally.

No

Step 6 Replace the left front door control module and right front door control module.

A Replace the left front door control module and right

front door control module.
B Verify if the fault is eliminated after the left front door
control module and the right front door control module are
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.6.5.5 Electric rearview mirror unfolding failure

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-467 Rearview mirror

Instrument Instrument
panel PDU panel PDU

Exterior rearview mirror

adjusting switch

Left front door control module Right front door control

module

Horizontal Vertical Horizontal Vertical

adjustmen adjustmen adjustmen adjustmen
t motor t motor t motor t motor
Folding motor Folding motor

Left exterior rearview Right exterior rearview

mirror mirror

2. Diagnostic procedure:
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the exterior rearview mirror unfolding signal circuit.

GAC Motor 2023

Rearview mirror 1-468 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Exterior rearview mirror adjusting switch harness position.
connector
B Disconnect the exterior rearview mirror adjustment
switch harness connector IP12.
C Disconnect the left front door control module harness
connector DD20.
D Measure the resistance of circuit between terminal 7
of the exterior rearview mirror adjustment switch harness
connector IP12 and terminal 21 of the left front door control
module harness connector DD20.
Standard resistance: less than 1Ω
Exterior rearview mirror
folding/unfolding signal E Verify if the resistance is consistent with the standard
value.

Left front door control module harness connector

No Repair or replace the harness.

Exterior rearview mirror

folding/unfolding signal

Yes

Step 2 Replace the exterior rearview mirror adjusting switch.

A Replace the exterior rearview mirror adjustment switch.

B Verify if the fault is eliminated after the exterior rearview
mirror adjustment switch is replaced.

Yes The system is working normally.

No

Step 3 Check the left exterior rearview mirror unfolding motor control circuit.

GAC Motor 2023

Electrics (I) 1-469 Rearview mirror

A Set the ENGINE START/STOP button to “OFF”

Left exterior rearview mirror harness connector position.
B Disconnect the left exterior rearview mirror harness
Rearview mirror folding connector DD14.
C Disconnect the left front door control module harness
connector DD22.
D Measure the resistance of circuit between terminal 4
of the left exterior rearview mirror harness connector DD14
and terminal 3 of the left front door control module harness
connector DD22.
E Measure the resistance of circuit between terminal 5
of the left exterior rearview mirror harness connector DD14
Rearview mirror unfolding and terminal 4 of the left front door control module harness
connector DD22.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left front door control module harness connector

Folding of left exterior

rearview mirror

No Repair or replace the harness.

Unfolding of left exterior

rearview mirror

Yes

Step 4 Check the right exterior rearview mirror unfolding motor control circuit.

A Set the ENGINE START/STOP button to “OFF”

Right exterior rearview mirror harness connector position.
Rearview mirror folding B Disconnect the right exterior rearview mirror harness
connector DD03.
C Disconnect the right front door control module
harness connector PD22.
D Measure the resistance of circuit between terminal 4
of the right exterior rearview mirror harness connector
PD14 and terminal 3 of the right front door control module
harness connector PD22.
E Measure the resistance of circuit between terminal 5
of the right exterior rearview mirror harness connector
Rearview mirror unfolding PD14 and terminal 4 of the right front door control module
harness connector PD22.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

GAC Motor 2023

Rearview mirror 1-470 Electrics (I)

Right front door control module harness connector

Unfolding of right exterior

rearview mirror

Folding of right exterior

rearview mirror

Yes

Step 5 Replace the exterior rearview mirror assembly.

A Replace the exterior rearview mirror assembly.

B Verify if the fault is eliminated after the exterior rearview
mirror assembly is replaced.

Yes The system is working normally.

No

Step 6 Replace the left front door control module and right front door control module.

A Replace the left front door control module and right

front door control module.
B Verify if the fault is eliminated after the left front door
control module and the right front door control module are
replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.6.5.6 Electric rearview mirror failure to be heated

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-471 Rearview mirror

Engine Instrument
compart panel PDU
Defogger ment
relay
PDU

HVAC
control unit
Right exterior Left exterior Rear windshield
rearview mirror rearview mirror defogger heater
(heater) (heater)

2. Diagnostic procedure:
Step 1 Check the fuses EF07, EF28 and IF13.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses EF07, EF28 and IF13 and check
whether they are blown.
The fuses EF07, EF28 and IF13 are rated at 7.5A, 40A and
7.5A respectively.
Yes Check and repair the fuse circuit and
replace it with a fuse of rated capacity.
No

Step 2 Check the defogger relay.

GAC Motor 2023

Rearview mirror 1-472 Electrics (I)

C Verify if the exterior rearview mirror heater works

normally.
Yes Replace the defogger relay.

No

Step 3 Check the console switch block buttons.

A Set the ENGINE START/STOP button to “ON”

position.
B Check whether the function buttons on the console
switch block are normal.
No Replace the console switch block.

Yes

Step 4 Check the defogger relay control circuit.

A Set the ENGINE START/STOP button to “OFF”

HVAC control unit harness connector
position.
B Unplug the defogger relay ER07.
C Disconnect the HVAC control unit harness connector
IP27.
D Measure the resistance of circuit between terminal 35 of
the HVAC control unit harness connector IP27 and slot 86
of the defogger relay ER07.

Standard resistance: less than 1Ω

Rear defogger relay control
E Verify if the resistance is consistent with the standard
signal value.
No Repair or replace the harness.

Yes

Step 5 Check the power supply circuit of the rearview mirror heater.

A Set the ENGINE START/STOP button to “OFF”

Left exterior rearview mirror harness connector
position.
B Disconnect the left exterior rearview mirror harness
connector PD14.
C Disconnect the right exterior rearview mirror harness
connector DD14.
D Set the ENGINE START/STOP button to “ON” position,
and press the rearview mirror heater switch button.
E Measure the voltage of circuit between terminal 8 of
the left exterior rearview mirror harness connector PD14
and the body ground.
Rearview mirror heater F Measure the voltage of circuit between terminal 8 of
power supply the right rearview mirror harness connector DD14 and the
body ground.
Standard voltage: 11~14V
G Verify if the voltage is consistent with the standard value.
No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-473 Rearview mirror

Right exterior rearview mirror harness connector

Rearview mirror heater

power supply

Yes

Step 6 Check the ground circuit of the rearview mirror heater.

A Set the ENGINE START/STOP button to “OFF”

Left exterior rearview mirror harness connector
position.
GND B Disconnect the left exterior rearview mirror harness
connector PD14.
C Disconnect the right exterior rearview mirror harness
connector DD14.
D Measure the resistance of circuit between terminal 6 of
the left exterior rearview mirror harness connector PD14
and the body ground.
E Measure the resistance of circuit between terminal 6 of
the right exterior rearview mirror harness connector DD14
and the body ground.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Right exterior rearview mirror harness connector

GND

No Repair or replace the harness.

Yes

Step 7 Replace the exterior rearview mirror heater.

GAC Motor 2023

Rearview mirror 1-474 Electrics (I)

A Replace the exterior rearview mirror heater (rearview

mirror lens).
B Verify if the fault is eliminated after the exterior rearview
mirror heater (rearview mirror lens) is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

GAC Motor 2023

Electrics (I) 1-475 Rearview mirror

1.6.6 Removal and installation

1.6.6.1 Removing and installing mirror lens assembly
Removal procedure
Note:
This section describes the removal and installation of the
left mirror lens assembly, and the right mirror lens assembly
may be removed and installed by reference to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)

3 Remove the mirror lens assembly

a. Insert the removal wedge at the position as arrowed, and
remove the mirror lens assembly ①.
Note:
Be careful when removing the mirror lens assembly, as it is
extremely vulnerable to damage.

b. Disconnect the connectors (arrows A and B), and take

out the mirror lens assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– During the installation of the mirror lens assembly, press it
onto the rearview mirror adjustment unit until a click is
heard.
- After the installation, perform the function test of the
exterior rearview mirror.

GAC Motor 2023

Rearview mirror 1-476 Electrics (I)

1.6.6.2 Removing and installing adjustment motor

assembly
Removal procedure
Note:
This section describes the removal and installation of left
adjustment motor assembly, and the right adjustment motor
assembly may be removed and installed by reference to
the left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the mirror lens assembly. Refer to1.6.6.1
Removing and installing mirror lens assembly

4 Remove the adjustment motor assembly

a. Unscrew the fixing screws of the adjustment motor
assembly as arrowed.

GAC Motor 2023

Electrics (I) 1-477 Rearview mirror

b. Undo the fixing clips as arrowed, and remove the

adjustment motor assembly ①.

c. Disconnect the connector as arrowed, and take out the

adjustment motor assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the
exterior rearview mirror.

GAC Motor 2023

Rearview mirror 1-478 Electrics (I)

1.6.6.3 Removing and installing exterior rearview

mirror assembly
Removal procedure
Note:
This section describes the removal and installation of left
exterior rearview mirror assembly, and the right exterior
rearview mirror assembly may be removed and installed by
reference to left one.
1 Remove the front door trim panel assembly. Refer to
Maintenance Manual - Body, HVAC
2 Remove the exterior rearview mirror assembly
a. Undo the fixing clip as arrowed, and de-bond one corner
of front door sealing strip.

b. Unscrew the fixing bolt of the exterior rearview mirror

assembly.
• Tightening torque of bolt: 8±2N·m

c. Disconnect the connectors of the exterior rearview mirror

assembly (arrows A and B).
d. Unscrew the fixing nuts (arrow C), and remove the
exterior rearview mirror assembly ①.
• Tightening torque of nut (arrow C): 8±2N·m

Installation procedure

GAC Motor 2023

Electrics (I) 1-479 Rearview mirror

The installation procedure is in reverse of removal

procedure, and the following points apply:
- After the installation, perform the function test of the
exterior rearview mirror assembly.
1.6.6.4 Removing and installing interior rearview mirror
assembly (manual anti-dazzling)
Removal procedure
Note:
Be careful when removing the interior rearview mirror
assembly to avoid damaging the front windshield assembly.

1 Remove the interior rearview mirror assembly (Base)

a. Remove the interior rearview mirror assembly ① as
arrowed.

2 Remove the interior rearview mirror assembly

(Medium and Premium)
a. Remove the left/right trim cover of the interior
rearview mirror. Refer to1.6.6.6 Removing and
installing interior rearview mirror left/right trim cover
b. Unscrew the fixing screws as arrowed, and take out the
interior rearview mirror assembly ①.
• Tightening torque of screw: 5±0.5N·m

Installation procedure
The installation procedure is in reverse of removal
procedure.

GAC Motor 2023

Rearview mirror 1-480 Electrics (I)

1.6.6.5 Removing and installing interior rearview mirror

assembly (automatic anti-dazzling)
Removal procedure
Note:
Be careful when removing the interior rearview mirror
assembly to avoid damaging the front windshield assembly.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the left/right trim cover of the interior
rearview mirror. Refer to1.6.6.6 Removing and
installing interior rearview mirror left/ right trim covers

4 Remove the interior rearview mirror assembly

a. Unscrew the fixing screws as arrowed, and take out the
interior rearview mirror assembly ①.
• Tightening torque of screw: 5±0.5N·m

b. Disconnect the connector as arrowed, and take out the

interior rearview mirror assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the
interior rearview mirror.

GAC Motor 2023

Electrics (I) 1-481 Rearview mirror

1.6.6.6 Removing and installing left/right trim cover of

interior rearview mirror
Removal procedure
Note:
When removing the left/right trim cover of the interior
rearview mirror, always take care to prevent damage to the
front windshield assembly.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the left/right trim covers of the interior
rearview mirror
a. Use the interior removal tool to detach the fixing clip
(arrow A), and remove the interior rearview mirror left/right
trim cover ① (arrow B).

b. Disconnect the AR camera connector as arrowed, and

remove the interior rearview mirror right trim cover ①.

c. Unscrew the fixing screws as arrowed, and detach the

AR camera ① and the interior rearview mirror right trim
cover ②.

GAC Motor 2023

Rearview mirror 1-482 Electrics (I)

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the AR
camera.
1.6.6.7 Removing and installing exterior rearview
mirror adjusting switch
Removal procedure
Note:
The exterior rearview mirror adjustment switch can be
removed and installed by reference to the removal and
installation of the left instrument panel switch block
assembly.
1 Remove the left instrument panel switch block
assembly. Refer to 1.4.10.13 Removing and installing
left instrument panel switch block assembly

GAC Motor 2023

Electrics (I) 1-483 Wiper/washer system

1.7 Wiper/washer system

1.7.1 Specifications
1.7.1.1 Fastener specifications

Location Specification Tightening torque:Nm

Hexagon head bolt and large washer
Washer system assembly M6×20 6±1
Hexagon flange nut M6
Left/right wiper arm and wiper blade
Hexagon flange nut M10×1.25 28±3
assembly
Hexagon head bolt and plain washer
Wiper motor and linkage assembly 8±2
assembly M6×30

GAC Motor 2023

Wiper/washer system 1-484 Electrics (I)

1.7.2 System description

1.7.2.1 System description
1. Overview
The front windshield washer system is a windshield cleaning device that ensures the driver's vision. The system consists
of wiper and washer systems. The wiper can operate at two speeds and intermittently; the wiper system consists of wiper
motor, linkage, wiper arm, wiper blade, etc. The washer system consists of washer fluid reservoir, washer motor, washer
pipeline, and washer nozzle, etc.
2. Function and operation
– With the ENGINE START/STOP button in “ON” position, the automatic wiping function is enabled and the wiper system
adjusts the speed according to the current rainfall and vehicle speed when the wiper combination switch is set to “AUTO”
position (premium).
– With the ENGINE START/STOP button in “ON” position, if the wiper combination switch is set to “MIST” position and
released, the wiper will move once and stop; and if the wiper combination switch is set to “MIST” position and held, the
wiper will work continuously.
– With the ENGINE START/STOP button in “ON” position, the wiper automatically works at a certain interval when the
wiper combination switch is set to “INT” position.
– With the ENGINE START/STOP button in “ON” position, the wiper works at a low speed when the wiper combination
switch is set to “LO” position.
– With the ENGINE START/STOP button in “ON” position, the wiper works at a high speed when the wiper combination
switch is set to “HI” position.
– With the ENGINE START/STOP button in “ON” position, the front windshield wiper is turned off when the wiper
combination switch is set to “OFF” position.
3. Wiper maintenance
– Within 10 s after switching the ENGINE START/STOP button to the "OFF" position, if you set the wiper combination
switch to the MIST position and then quickly release it to return it to the original position, the front wiper will move to the
highest position and then stop to enter the wiper maintenance mode.
Caution
– The wiper maintenance mode can be activated by setting the AV system "Settings → Body Accessories → Other
Accessories → Wiper Maintenance Mode".

GAC Motor 2023

Electrics (I) 1-485 Wiper/washer system

1.7.3 Exploded view

1.7.3.1 Exploded view 1

Right wiper arm and wiper Left wiper arm and wiper
blade assembly blade assembly

Right wiper
blade Left wiper
blade

Pivot cover of
wiper arm
Pivot cover
of wiper arm

(2 pcs in total)
Left wiper arm
Right wiper arm

(2 pcs in total)

Front wiper motor

Front wiper
Front wiper motor and linkage assembly linkage

Tightening torque is measured in N•m

GAC Motor 2023

Wiper/washer system 1-486 Electrics (I)

1.7.3.2 Exploded view 2

Front windshield left washer

nozzle

Front windshield right

Front windshield right washer nozzle I
washer nozzle

Front windshield right

washer nozzle II

Filler

(3 pcs in total)

Washer fluid reservoir

assembly

Front windshield washer

motor

Tightening torque is measured in N•m

GAC Motor 2023

Electrics (I) 1-487 Wiper/washer system

1.7.4 Electrical schematic diagram

1.7.4.1 Electrical schematic diagram

Engine compartment PDU

Control
Wiper relay Front windshield
washer motor

Control
Wiper combination
switch
Wiper speed control
relay
BCM

RLS

HI

Front wiper motor LO

Reset

GAC Motor 2023

Wiper/washer system 1-488 Electrics (I)

1.7.5 Diagnostic information and procedure

1.7.5.1 Diagnostic instructions
Familiarize yourself with the system functions and operations before starting the system diagnosis. This helps correctly
determine the diagnostic procedure when a fault occurs, and more importantly, helps determine whether the situation
described by the customer is normal.
1.7.5.2 Visual inspection
• Check for aftermarket parts that may affect the operation of the front windshield wiper/washer system.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• Check whether the level in the washer fluid reservoir is correct.
1.7.5.3 Failure of wiper to work in HI
1. Circuit diagram

Engine compartment PDU

ER11 ER12
Wiper Wiper
Instrument
speed relay panel PDU
control
relay

LO HI Front
wiper
Reset motor Integrated BCM

Wiper high speedWiper low speedWiper manualFront wiper & Wiper automatic GND
adjusting switch adjusting switch intermittent washer switch intermittent
Windshield
adjusting switch adjusting switch washer
Wiper combination switch motor

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-489 Wiper/washer system

Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the wiper combination switch.

Wiper combination switch

A Set the ENGINE START/STOP button to “OFF”
position.
B Remove the wiper combination switch.
C Set the wiper combination switch to “HI” position.
D Use a multimeter to measure the resistance between
terminals 3 and 8 of the wiper combination switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the wiper combination switch.

Yes

Step 2 Check the circuit between the wiper combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch harness connector
position.

Wiper high speed B Disconnect the wiper combination switch harness

adjusting switch connector IP25.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 3
of the wiper combination switch harness connector IP25
and terminal 46 of the integrated BCM harness connector
IP01.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Wiper/washer system 1-490 Electrics (I)

Integrated BCM harness connector

Wiper combination
switch (HI)

Yes

Step 3 Check the ground circuit of the wiper combination switch.

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch harness connector position.
B Disconnect the wiper combination switch harness
connector IP25.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 8
of the wiper combination switch harness connector IP25
and terminal 31 of the integrated BCM harness connector
BD11.
Standard resistance: less than 1Ω
GND E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 4 Check the power supply and ground circuits of the front wiper motor.

GAC Motor 2023

Electrics (I) 1-491 Wiper/washer system

A Check whether the power supply and ground circuits

of the front wiper motor are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the front wiper motor.

A Replace the front wiper motor.

B Verify if the fault is eliminated after the front wiper
motor is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.7.5.4 Failure of wiper to work in LO

1. Circuit diagram

GAC Motor 2023

Wiper/washer system 1-492 Electrics (I)

Engine compartment PDU

ER11 ER12
Wiper Wiper
Instrument
speed relay panel PDU
control
relay

LO HI Front
wiper
Reset motor Integrated BCM

Wiper high speedWiper low speedWiper manualFront wiper & Wiper automatic GND
adjusting switch adjusting switch intermittent washer switch intermittent
Windshield
adjusting switch adjusting switch washer
Wiper combination switch motor

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the wiper combination switch.

GAC Motor 2023

Electrics (I) 1-493 Wiper/washer system

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch position.
B Remove the wiper combination switch.
C Set the wiper combination switch to “LO” position.
D Use a multimeter to measure the resistance between
terminals 2 and 8 of the wiper combination switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Replace the wiper combination switch.

Yes

Step 2 Check the circuit between the wiper combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch harness connector position.

Wiper low speed B Disconnect the wiper combination switch harness

adjusting switch connector IP25.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 2
of the wiper combination switch harness connector IP25
and terminal 27 of the integrated BCM harness connector
IP01.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Wiper combination
switch (LO)

No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the wiper combination switch.

GAC Motor 2023

Wiper/washer system 1-494 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch harness connector
position.
B Disconnect the wiper combination switch harness
connector IP25.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 8
of the wiper combination switch harness connector IP25
and terminal 31 of the integrated BCM harness connector
BD11.
Standard resistance: less than 1Ω
GND E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 4 Check the power supply and ground circuits of the front wiper motor.

A Check whether the power supply and ground circuits

of the front wiper motor are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the front wiper motor.

A Replace the front wiper motor.

B Verify if the fault is eliminated after the front wiper
motor is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

GAC Motor 2023

Electrics (I) 1-495 Wiper/washer system

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.7.5.5 Failure of wiper to work in INT

1. Circuit diagram

Engine compartment PDU

ER11 ER12
Wiper Wiper
Instrument
speed relay panel PDU
control
relay

LO HI Front
wiper
Reset motor Integrated BCM

Wiper high speedWiper low speedWiper manualFront wiper & Wiper automatic GND
adjusting switch adjusting switch intermittent washer switch intermittent
Windshield
adjusting switch adjusting switch washer
Wiper combination switch motor

2. Diagnostic procedure

GAC Motor 2023

Wiper/washer system 1-496 Electrics (I)

Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the wiper combination switch.

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch
position.
B Remove the wiper combination switch.
C Set the wiper combination switch to “INT” position.
D Use a multimeter to measure the resistance between
terminals 1 and 8 of the wiper combination switch.
E Use a multimeter to measure the resistance between
terminals 10 and 8 of the wiper combination switch.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Replace the wiper combination switch.

Yes

Step 2 Check the circuit between the wiper combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Wiper
Integrated
combination
BCM harness
switchconnector
harness connector position.
Manual intermittent B Disconnect the wiper combination switch harness
position connector IP25.
C Disconnect the integrated BCM harness connectors
IP01 and BD11.
D Measure the resistance of circuit between terminal 1
of the wiper combination switch harness connector IP25
and terminal 32 of the integrated BCM harness connector
IP01.
E Measure the resistance of circuit between terminal 10
Automatic intermittent of the wiper combination switch harness connector IP25
position
and terminal 41 of the integrated BCM harness connector
BD11.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-497 Wiper/washer system
Integrated BCM harness connector

Wiper combination switch

(manual intermittent)

Integrated BCM harness connector

Wiper combination switch (Auto

INT)

Yes

Step 3 Check the ground circuit of the wiper combination switch.

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch harness connector position.
B Disconnect the wiper combination switch harness
connector IP25.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 8
of the wiper combination switch harness connector IP25
and terminal 31 of the integrated BCM harness connector
BD11.
Standard resistance: less than 1Ω

GND E Verify if the resistance is consistent with the standard

value.

No Repair or replace the harness.

GAC Motor 2023

Wiper/washer system 1-498 Electrics (I)

Integrated BCM harness connector

GND

Yes

Step 4 Check the power supply and ground circuits of the front wiper motor.

A Check whether the power supply and ground circuits

of the front wiper motor are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the front wiper motor.

A Replace the front wiper motor.

B Verify if the fault is eliminated after the front wiper
motor is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.7.5.6 Front washer failure

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-499 Wiper/washer system

Engine compartment PDU

ER11 ER12
Wiper Wiper
Instrument
speed relay panel PDU
control
relay

LO HI Front
wiper
Reset motor Integrated BCM

Wiper high speedWiper low speedWiper manualFront wiper & Wiper automatic GND
adjusting switch adjusting switch intermittent washer switch intermittent
Windshield
adjusting switch adjusting switch washer
Wiper combination switch motor

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the windshield washer motor fuse IF53.

A
B Set the ENGINE START/STOP button to “OFF” position.
C Unplug the fuse IF53 and check whether it is blown.
The fuse IF53 is rated at 15A

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

GAC Motor 2023

Wiper/washer system 1-500 Electrics (I)

Step 2 Check the wiper combination switch.

Wiper combination switch A Set the ENGINE START/STOP button to “OFF”

position.
B Remove the wiper combination switch.
C Set the wiper combination switch to “Front Washer”
position.
D Use a multimeter to measure the resistance between
terminals 8 and 9 of the wiper combination switch.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.
No Replace the wiper combination switch.

Yes

Step 3 Check the circuit between the wiper combination switch and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Wiper combination switch harness connector
position.
B Disconnect the wiper combination switch harness
connector IP25.
C Disconnect the integrated BCM harness connector
IP01.
D Measure the resistance of circuit between terminal 9
of the wiper combination switch harness connector IP25
and terminal 28 of the integrated BCM harness connector
IP01.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.
Front wiper & washer
switch signal

Integrated BCM harness connector

Front wiper & washer

switch signal

No Repair or replace the harness.

Yes

GAC Motor 2023

Electrics (I) 1-501 Wiper/washer system

Step 4 Check the ground circuit of the wiper combination switch.

Wiper combination switch harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the wiper combination switch harness
connector IP25.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 8
of the wiper combination switch harness connector IP25
and terminal 31 of the integrated BCM harness connector
BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
GND
value.

Integrated BCM harness connector

GND

No Repair or replace the harness.

Yes

Step 5 Check the power supply circuit of the windshield washer motor.

Integrated BCM harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
Integrated BCM (wiper and washer) B Disconnect the integrated BCM harness connector
FB30.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminal 3 of the
integrated BCM harness connector FB30 and the body
ground.
Standard voltage: 11~14V
E Verify if the voltage is consistent with the standard
value.
No Repair or replace the harness.

Yes

GAC Motor 2023

Wiper/washer system 1-502 Electrics (I)

Step 6 Check the circuit between the windshield washer motor and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
FB30.
C Disconnect the windshield washer motor harness
connector FB18.
D Measure the resistance of circuit between terminal 3
of the integrated BCM harness connector FB30 and
terminal 1 of the windshield washer motor harness
connector FB18.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
Windshield washer
motor signal
value.

Windshield washer motor harness connector

Windshield washer
motor signal

No Repair or replace the harness.

Yes

Step 7 Check the circuit between the windshield washer motor and the body ground.

A Set the ENGINE START/STOP button to “OFF”

Windshield washer motor harness connector
position.
Windshield washer
B Disconnect the windshield washer motor harness
motor signal connector FB18.
C Measure the resistance of circuit between terminal 2 of
the windshield washer motor harness connector FB18 and
the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Step 8 Replace the windshield washer motor.

GAC Motor 2023

Electrics (I) 1-503 Wiper/washer system

A Replace the windshield washer motor.

B Verify if the fault is eliminated after the windshield
washer motor is replaced.

Yes The system is working normally.

No

Step 9 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 10 End.

GAC Motor 2023

Wiper/washer system 1-504 Electrics (I)

1.7.6 List of special tools

1.7.6.1 List of special tools

No. Illustration Tool No. Designation

1 8910705BAC0000 Wiper arm removal tool kit

GAC Motor 2023

Electrics (I) 1-505 Wiper/washer system

1.7.7 Removal and installation

1.7.7.1 Removing and installing filling port
Removal procedure
1 Open the engine hood.
2 Remove the right front wheel mudguard assembly.
Refer to Maintenance Manual - Body, HVAC

3 Remove the filling port

a. Screw off the upper fixing bolts of the filler as arrowed.
• Tightening torque of bolt: 6±1N·m

b. Undo the fixing clips as arrowed, and remove the filler

①.

Installation procedure
The installation procedure is in reverse of removal
procedure.

GAC Motor 2023

Wiper/washer system 1-506 Electrics (I)

1.7.7.2 Removing and installing washer fluid reservoir

assembly
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the front bumper assembly. Refer to
Maintenance Manual - Body, HVAC
4 Remove the filler. Refer to 1.7.7.1 Removing and
installing filling port
5 Remove the front windshield washer motor. Refer to
1.7.7.3 Removing and installing front windshield
washer motor

6 Remove the washer fluid reservoir assembly

a. Disconnect the windshield washer hose assembly Ⅰ
from the washer fluid reservoir assembly (arrow A).
b. Unscrew the fixing bolt (arrow B) and the nut (arrow C),
and remove the washer fluid reservoir assembly ①.
• Tightening torque of bolt (arrow B): 6±1N·m
• Tightening torque of nut (arrow C): 6±1N·m

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, add the washer fluid.
– When the outdoor temperature is lower than 0°C, it is
prohibited to add tap water or mineral water.

GAC Motor 2023

Electrics (I) 1-507 Wiper/washer system

1.7.7.3 Removing and installing front windshield

washer motor
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the right front wheel mudguard assembly.
Refer to Maintenance Manual - Body, HVAC

4 Remove the front windshield washer motor

a. Disconnect the connector of the front windshield washer
motor (arrow A).
b. Disconnect the windshield washer hose assembly Ⅰ
from the front windshield washer motor (arrow B).
c. Remove the front windshield washer motor ①.
Note:
After removing the front windshield washer motor, check
whether the motor sealing ring is aged or damaged, and if
any, replace it with a new one.
Before removing the front windshield washer motor, place a
container under the front windshield washer motor to collect
the washer fluid.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, add the washer fluid and check that
there is no water leakage at the motor sealing ring.
– When the outdoor temperature is lower than 0°C, it is
prohibited to add tap water or mineral water.

GAC Motor 2023

Wiper/washer system 1-508 Electrics (I)

1.7.7.4 Removing and installing front windshield

washer nozzle
Removal procedure
Note:
This section describes the removal and installation of front
windshield left washer nozzle, and the front windshield right
washer nozzle may be removed and installed by reference
to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Open the engine hood.

3 Remove the front windshield washer nozzle

a. Undo the fixing clips as arrowed, and remove the front
windshield washer nozzle ①.

b. Disconnect the front windshield washer nozzle ① from

the windshield washer hose ②.
c. Take out the front windshield washer nozzle ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check and adjust the front
windshield washer nozzle. Refer to 1.7.7.13 Adjusting front
windshield washer nozzle

GAC Motor 2023

Electrics (I) 1-509 Wiper/washer system

1.7.7.5 Removing and installing front wiper blade

Removal procedure
Note:
This section describes the removal and installation of the
left front wiper blade, and the right front wiper blade may be
removed and installed by reference to left one.
1 Set the front wiper to maintenance mode.
Note:
Ensure that the engine hood is fully closed, turn the
ENGINE START/STOP button to the "ON" position and
then to the "OFF" position. Within 10 seconds after the
previous step, if the wiper combination switch is moved to
the "MIST" position and then returns to the original position,
the front wiper will move to the highest position and stop.
The wiper maintenance function can be activated by setting
“System Setting - Body Accessories - Other Accessories -
Wiper Maintenance Mode” on the multimedia touch screen.

2 Remove the front wiper blade

a. Pull up the wiper arm ① from the front windshield
assembly.

b. Press the wiper blade lock button (arrow A), and remove
the front wiper blade ① (arrow B).
Note:
After removing the front wiper blade, wrap the wiper arm
end with sufficient cloth to prevent the wiper arm from
damaging the front windshield assembly.

Installation procedure
The installation procedure is in reverse of removal
procedure.

GAC Motor 2023

Wiper/washer system 1-510 Electrics (I)

1.7.7.6 Removing and installing wiper arm and wiper

blade assembly
Removal procedure
Caution
When removing the wiper arm and wiper assembly, make
sure that the wiper arm is in the normal resting position.
Note:
This section describes the removal and installation of the
left wiper arm and wiper blade assembly, and the right
wiper arm and wiper blade assembly may be removed and
installed by reference to left one.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Open the engine hood.

3 Remove the wiper arm and wiper blade assembly

a. Remove the wiper arm pivot cover ①.

GAC Motor 2023

Electrics (I) 1-511 Wiper/washer system

b. Unscrew the fixing nuts of the wiper arm and wiper blade
assembly as arrowed.
• Tightening torque of nut: 28±3N·m

c. Push the wiper arm removal tool kit ①

(8910705BAC0000) into the bottom of the left wiper arm
and wiper blade assembly ③ as shown in the figure.
d. Turn the holddown bolt ② clockwise to disconnect the
left wiper arm and wiper blade assembly ③ from the fixing
shaft.
e. Take out the wiper arm removal tool kit ① and the left
wiper arm and wiper blade assembly③.
f. Remove the right wiper arm and wiper blade assembly
④ in the same way.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– When installing the wiper arm and wiper blade assembly,
distinguish the left and right parts.
– Check and adjust the installation position of the wiper
blade. Refer to 1.7.7.12 Checking and adjusting installation
position of wiper blade

GAC Motor 2023

Wiper/washer system 1-512 Electrics (I)

1.7.7.7 Removing and installing front wiper motor and

linkage assembly
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the wiper arm and wiper blade assembly.
Refer to 1.7.7.6 Removing and installing wiper arm
and wiper blade assembly
4 Remove the wiper cover assembly. Refer to
Maintenance Manual - Body, HVAC

5 Remove the front wiper motor and linkage assembly

a. Disconnect the front wiper motor connector (arrow A).
b. Unscrew the fixing bolt (arrow B), and take out the front
wiper motor and linkage assembly ①.
• Tightening torque of bolt (arrow B): 8±2N·m

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the front
wiper motor and linkage assembly.

GAC Motor 2023

Electrics (I) 1-513 Wiper/washer system

1.7.7.8 Removing and installing front wiper motor

Removal procedure
1 Remove the front wiper motor and linkage assembly.
Refer to 1.7.7.7 Removing and installing front wiper
motor and linkage assembly

2 Remove the front wiper motor

a. Use a slotted screwdriver to detach the motor linkage ①
as arrowed.

b. Unscrew the fixing nuts of the motor rocker ① as

arrowed.

GAC Motor 2023

Wiper/washer system 1-514 Electrics (I)

c. Push the wiper arm removal tool kit ①

(8910705BAC0000) into the bottom of the motor rocker ③
as shown in the figure.
d. Turn the holddown bolt ② clockwise to disconnect the
motor rocker ③ from the fixing shaft.

e. Unscrew the fixing bolt as arrowed, and detach the front

wiper motor ① and the front wiper linkage ②.
Caution
If the wiper arm is shaken during the removal, before the
motor is removed, the front wiper motor connector should
be connected to allow the motor to run to the normal resting
position.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
- After the installation, perform the function test of the front
wiper motor.
1.7.7.9 Removing and installing front wiper linkage
Removal procedure
Note:
The method of removing and installing the front wiper
linkage is the same as that of removing and installing the
front wiper motor.
1 Remove the front wiper motor. Refer to 1.7.7.8
Removing and installing front wiper motor

GAC Motor 2023

Electrics (I) 1-515 Wiper/washer system

1.7.7.10 Removing and installing wiper combination

switch
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the steering column lower shroud assembly.
Refer to Maintenance Manual - Body, HVAC

4 Remove the wiper combination switch

a. Disconnect the wiper combination switch connector
(arrow A).
b. Press the fixing clip (arrow B), and remove the wiper
combination switch ① (arrow C).

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether each gear of the
wiper combination switch functions normally.

GAC Motor 2023

Wiper/washer system 1-516 Electrics (I)

1.7.7.11 Removing and installing rain light sensor (RLS)

Removal procedure
Note:
When removing the RLS, care must be taken to prevent
damage to the front windshield assembly.
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the left/right trim cover of the interior
rearview mirror. Refer to1.6.6.6 Removing and
installing interior rearview mirror left/ right trim covers

4 Remove the RLS

a. Undo the fixing clip as arrowed, and remove the RLS ①.
Caution
Always take care to avoid damage to the front windshield
assembly.

b. Disconnect the connector as arrowed, and take out the

RLS ①.

Installation procedure

GAC Motor 2023

Electrics (I) 1-517 Wiper/washer system

The installation procedure is in reverse of removal

procedure, and the following points apply:
– The protective cover or protective film of the RLS needs
to be removed before the installation.
– Remove the adhesive residue from the front windshield
assembly as arrowed and clean the installation position
before the installation.
– Avoid dust or fingerprints on the silicone surface of the
RLS.
– After the installation, check the fixing clip for tightness.
– Check from the side of the front windshield assembly
whether the RLS is fully fitted. If bubbles still exist, it is
necessary to adjust it.

1.7.7.12 Inspecting and adjusting installation position

of wiper blade

1 Check the installation position of the wiper blade:

a. Check whether the rubber part of the wiper blade
coincides with the five small dots on the lower edge of the
front windshield as arrowed.

2 Adjust the installation position of the wiper blade:

a. If excessive deviation is found during the above
inspection, it is necessary to set the wiper arm to the
normal resting position, remove the wiper arm and wiper
blade assembly, align the rubber part of the wiper blade
with the five small dots on the lower edge of the front
windshield as arrowed, and then install the wiper arm and
wiper blade assembly.
b. Remove the wiper arm and wiper blade assembly. Refer
to1.7.7.6 Removing and installing wiper arm and wiper
blade assembly

GAC Motor 2023

Wiper/washer system 1-518 Electrics (I)

1.7.7.13 Adjusting front windshield washer nozzle

Adjustment procedure
Note:
If the spray area is uneven due to impurities in the nozzles,
remove the nozzles and rinse them with water in the
opposite direction of the nozzle spray. And then blow the
nozzles in the opposite direction of the nozzle spray with
compressed air.

1 Adjust the front windshield washer nozzle

a. The nozzles have been pre-adjusted and the adjustment
can only compensate for small height deviation.

b. If the two spray zones are not at the same height, adjust
the device as arrowed with the needle nose pliers to adjust
the direction of the nozzle spray.

GAC Motor 2023

Electrics (I) 1-519 Driver information system
1.8 Driver information system
1.8.1 System description
1.8.1.1 System description
System overview
This model is equipped with a 3.5-inch TFT instrument, a 7-inch LCD instrument and a 10.25-inch LED instrument. They
are mainly display the engine speed, vehicle speed, engine coolant temperature, remaining fuel amount, gear information,
drive mode information, outside temperature, total mileage, driving information, vehicle status, alarm center and some
indicator lamps.
The 7-inch LED instrument has three themes, namely the full screen theme, the organic theme and the AVDC theme. The
instrument themes can be switched through VIEW button on the steering wheel, or by the switching of the drive modes
after the center console setting is bound with the drive modes.
The 10.25-inch LED instrument has five themes, namely the AR navigation theme, the AVDC theme, the navigation theme,
the organic theme and intelligent driving theme. The instrument themes can be switched through VIEW button on the
steering wheel, or by the switching of the drive modes after the center console setting is bound with the drive modes.
There are day and night modes for each theme, and users can switch between them through the center console setting.
Speedometer
The speedometer indicates the current speed of the vehicle in km/h, in the range of 0km/h~240km/h.
– The speedometer uses digital display with an accuracy of 1km/h.
Caution
– According to laws and regulations, the vehicle speed indicated is generally greater than the actual vehicle speed. For
driving safety, please strictly abide by the traffic rules, and never speed the vehicle.
Tachometer
The tachometer is used to indicate the current engine speed in 1000r/min, in the range of 0r/min~8000r/min.
– The display accuracy is 100r/min.
– For 7-inch LED instrument, the full screen theme and the AVDC theme are of digital display and the organic theme is of
dial display.
– For 10.25-inch LED instrument, the organic theme is of dial display, and the tachometers of the other four themes are of
digital display.
Caution
– The 6,000~8,000 r/min zone indicates the high load area. The engine speed must not reach this area, otherwise engine
fuel shut-off for self-protection and loss of power may occur, and the engine will be prone to damage.
Driving range
The fixed position of the range is usually displayed in the lower right corner of the screen, and the indicated icon is the fuel
indicator lamp.
When the range is less than 50km or the fuel level is less than 10%, the range will display "Low".
The pop-up text at the top also reminds the user to refuel in time.
Engine coolant temperature gauge
The engine coolant temperature gauge (water temperature gauge) is used to indicate the current temperature of the
engine coolant. The indication range is from C to H, where "C" indicates low temperature and "H" indicates high
temperature. Corresponding number of scale division are illuminated according to the engine coolant.
Fuel gauge
The fuel gauge is used to indicate the current amount of fuel remaining in the fuel tank. The indication range is from E to F,
where “E” means the fuel tank is empty, and "F" means the fuel tank is full. The corresponding scale divisions are
illuminated according to the remaining fuel in the fuel tank.
When no scale division is illuminated or only the first scale division is illuminated, it means that the fuel in the fuel tank is
insufficient. In that case, the yellow indicator lamp on the instrument cluster will flash, accompanied by the pop-up alarm
message at the top, reminding the driver to add fuel as soon as possible.
Odometer
The odometer displays the traveled distance of the vehicle in the driving information.
– The indication range is 0 km ~ 999999km.

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Driver information system 1-520 Electrics (I)
Gear display
It is used to indicate the current gear of the vehicle, and display P, R, N, D and other gear information according to the
received signal.
Driving mode display
ECO: In this mode, the slight power hysteresis occurs and fuel consumption is more economical.
COMFORT: In this mode, the dynamic response and fuel consumption are more balanced.
SPORT: In this mode, the dynamic response is fast and the fuel consumption is high.
Note:
The current driving mode parameters can be set by clicking the AV system App menu “Shadow Driver” and clicking the
“Current Mode Setting”.
Each driving mode has a reset button to restore the initial factory settings of that mode with one click.
If you want to memorize the current driving mode, you need to enable the memory through the AV system "Settings →
Chassis and Powertrain → Current Driving Mode Memory", and the current driving mode will be defaulted to the next time
you start the vehicle.
Driving information
The driving information of the 3.5-inch TFT instrument can be selected by switching the up and down buttons on the
steering wheel. It includes the vehicle status, the current trip information, the cumulative driving information and the alarm
center.
The driving information of the 7-inch LED instrument can be selected by switching the up and down buttons on the
steering wheel. It includes the table of G values, the vehicle status, the navigation information, the current trip information,
the cumulative driving information, the energy consumption trend graph, the driving assistance, the alarm center and the
shadow driver mode.
The menu information of the 10.25-inch LED instrument can be selected by switching the up and down buttons on the
steering wheel. The static menu includes the vehicle status, the driving information, the fuel consumption trend graph, the
shadow driver mode; the dynamic menu includes ADAS function and the alarm center.
1.8.1.2 Instrument cluster indicator lamp
Description
– Depending on vehicle configurations, different indicator lamps are provided on the instrument cluster.
Warning indicator lamps on instrument cluster
1 Charging system warning lamp 2 MIL
3 Low oil pressure warning lamp 4 Emission fault indicator lamp
5 Left turn signal and hazard warning lamp 6 High engine coolant temperature indicator lamp
7 Supplemental restraint system (SRS) indicator lamp 8 Low fuel level indicator lamp
9 Right turn signal and hazard warning lamp 10 Electric park brake (EPB) status indicator lamp
11 Electric park brake (EPB) fault indicator lamp 12 Parking brake and brake system indicator lamp
13 Electronic stability program (ESP) indicator lamp 14 ESP OFF indicator lamp
15 Anti-lock braking system (ABS) indicator lamp 16 Transmission fault indicator lamp
17 Tire pressure monitoring system (TPMS) indicator lamp 18 Electric power steering (EPS) indicator lamp
19 Intelligent high beam indicator lamp* 20 ACC indicator lamp (no vehicle ahead)*
21 ACC indicator lamp (a vehicle ahead)* 22 ACC fault indicator lamp*
23 LDW status indicator lamp* 24 FCW status indicator lamp*
25 Front passenger’s seat belt indicator lamp 26 Driver’s seat belt indicator lamp
27 High beam indicator lamp 28 Position lamp indicator lamp
29 Rear fog lamp indicator lamp 30 BSD system status indicator lamp *
31 Hill descent control (HDC) indicator lamp* 32 Hand-off indicator lamp*

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Electrics (I) 1-521 Driver information system

33 LKA status indicator lamp* 34 Rear seat belt indicator lamp*

35 Virtual key connection indicator lamp* 36 Door ajar indicator lamp

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Driver information system 1-522 Electrics (I)

1.8.2 Location of components

1.8.2.1 Location of components

Instrument cluster
display

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Electrics (I) 1-523 Driver information system
1.8.3 Electrical schematic diagram
1.8.3.1 Electrical schematic diagram

To IG1 power supply

Fuel level sensor

Signal
Main fuel pump
To BAT power supply

To BCAN system Brake fluid level sensor

Instrument cluster

Clock spring

Steering wheel
Oil pressure switch

switch
GWM

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Driver information system 1-524 Electrics (I)
1.8.4 Diagnostic information and procedure
1.8.4.1 Diagnostic instructions
The diagnostic scan tool may be used to read the switch and sensor values by reading the DTC via the OBD DLC of the
vehicle and reading the data table displayed on the scan tool based on the data table of ICM without removing any part.
Reading the data table can be used to quickly locate a fault, and it is one of the ways to shorten the diagnosis time.
1.8.4.2 Visual inspection
• Verify the symptom.
No symptom present during troubleshooting is the most difficult case in which the fault described by the user must be
analyzed thoroughly. Then the same or similar conditions and environment when the user’s vehicle fails can be simulated.
No matter how experienced the maintenance personnel are and how skilled their technique is, if they do not verify the
symptoms before troubleshooting, they may ignore some critical concerns and give incorrect conjecture during repair. This
will make troubleshooting impossible.
• Check the accessible or visible system components for obvious damage or conditions which may cause faults.
• The connectors and the support points of vibration are the main locations which must be checked thoroughly. The
vibration method is recommended in case of fault due to vibration.
a Gently vibrate the suspected sensor part with fingers to check it for fault.
b Gently shake the connector in the vertical and horizontal directions.
c Gently shake the harness in the vertical and horizontal directions.
1.8.4.3 ECU terminals
ICM harness connector (IP06)
Instrument cluster harness connector

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
1 0.35/green BCAN-L － －
2 0.35/yellow BCAN-H － －
3 0.5/orange Oil pressure switch signal － －
Main fuel pump level sensor
7 0.35/pink － －
ground
Main fuel pump level sensor
10 0.35/brown － －
signal
Instrument cluster display
11 0.35/green － －
switching signal +
ENGINE
14 0.35/blue IG1 power supply START/STOP button Battery voltage
is in ON position
The ENGINE
16 0.35/red Battery power supply START/STOP button Battery voltage
is set to any position
17 0.35/Gray Brake fluid level sensor signal － －
Main fuel pump level sensor 5V
30 0.35/pink － －
power supply

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Electrics (I) 1-525 Driver information system

Wire Reference value

Terminal No. Terminal definition Condition
diameter/color (approx.)
Instrument cluster display
31 0.35/black － －
switching signal -
32 0.35/black GND － 0V

1.8.4.4 Data list

Diagnostic Range
display/measurement Subtype Unit
item Min. Max.
Odometer - 0 999999 km
Battery voltage - 7 18 V
Number of failures 0 65535 -
Extended frame data Aging counter 0 65535 -
Aged counter 0 255 -
Diagnostic session
- 0 3 -
mode
Operating voltage - 7 24 V
Fuel value - 1 65 L
Mileage that can be
- 0 250 km
reduced

1.8.4.5 List of diagnostic trouble codes (DTCs)

DTC DTC definition Possible causes Recommended action

Battery voltage higher than
B180017 KL30 Voltage High Check the battery module
16V
B180016 KL30 Voltage Low Battery voltage lower than 9V Check the battery module
1. Check whether the connector of the fuel tank
1. The fuel tank fuel pump
fuel pump sensor is shorted to ground, and if so,
sensor is shorted to ground
replace the fuel pump sensor
2. The harness between the
2. Check whether the harness between fuel tank
Fuel Circuit Shorted to fuel tank fuel pump sensor
B182011 fuel pump sensor and instrument cluster is
Ground and instrument cluster is
shorted to ground, and if so, replace the harness
shorted to ground
3. Check whether the connector of the
3. The instrument cluster
instrument cluster node is shorted to ground,
connector is shorted to ground
and if so, replace the instrument cluster node
1. Check whether the connector of the fuel tank
1. The fuel tank fuel pump
fuel pump sensor is shorted to power supply or
sensor is shorted to power
open-circuited, and if so, replace the fuel pump
supply or open-circuited
sensor
2. The harness between the
2. Check whether the harness between fuel tank
fuel tank fuel pump sensor
Fuel Circuit Shorted to Power fuel pump sensor and instrument cluster is
B182012 and instrument cluster is
Supply or Open-circuited shorted to power supply or open-circuited, and if
shorted to power supply or
so, replace the harness
open-circuited
3. Check whether the connector of the
3. The instrument cluster
instrument cluster node is shorted to power
connector is shorted to power
supply or open-circuited, and if so, replace the
supply or open-circuited
instrument cluster node
1. Check whether there is interference source
1. Instrument cluster node is that affects the instrument cluster
Instrument Cluster Node interfered 2. Check whether the connector of the
U007388
Offline 2. Instrument cluster instrument cluster node is connected properly,
communication failure and if not, it is recommended to replace the
instrument cluster node
1. Check whether the communication with the
Instrument cluster node instrument cluster can be restored
B186000 Transceiver Fault transceiver chip
communication OFF 2. If not, it is recommended to replace the
instrument cluster node
1. Check whether the vehicle network
communication is normal
Instrument Cluster in Instrument cluster in 2. Check whether the connector of the
U007480
Limphome Mode single-node offline status instrument cluster node is connected properly,
and if not, it is recommended to replace the
instrument cluster node

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Driver information system 1-526 Electrics (I)

DTC DTC definition Possible causes Recommended action

1. Check whether the HVAC node connector is
connected properly
Received HVAC Node Signal Abnormal communication
U042481 2. Check whether the communication with the
Invalid with HVAC node
HVAC node is normal; if the HVAC node does not
work normally, replace it
1. Check whether the HVAC node connector is
connected properly
Lost Communication with HVAC node
U010187 2. Check whether the communication with the
HVAC communication failure
HVAC node is normal; if the HVAC node does not
work normally, replace it
1. Check whether the BCM connector is connected
properly.
Lost Communication with BCM communication
U014087 2. Check whether the communication with the BCM
BCM failure
is normal; if the BCM does not work normally,
replace it
1. Check whether the RPA connector is connected
Lost Communication with properly
U015987 RPA communication failure
RPA 2. Check if the RPA communicates normally. If not,
replace it.
1. Check whether the PEPS connector is connected
properly
Lost Communication with PEPS communication
U132087 2. Check whether the communication with the
PEPS failure
PEPS is normal; if the PEPS does not work
normally, replace it
1. Check whether the ACU connector is connected
Lost Communication with ACU communication properly
U018487
ACU failure 2. Check if the ACU communicates normally. If not,
replace it.
1. Check whether the GWM connector is connected
properly
Lost Communication with GWM node communication
U014687 2. Check whether the communication with the GWM
GWM failure
is normal; if the GWM does not work normally,
replace it
1. Check whether the GWM connector is connected
properly
GWM node communication
U044781 Received GWM Signal Invalid 2. Check whether the communication with the GWM
failure
is normal; if the GWM does not work normally,
replace it
1. Check whether the MSM connector is connected
Lost Communication with The MSM communication firmly
U020887
MSM is faulty 2. Check whether the communication with the MSM
is normal; if not, replace it
1. Check if the telematics connector is connected
properly.
The Telematics
U019887 Lost Communication with TEL 2. Check whether the communication with the
communication is faulty
telematics is normal; if the telematics does not work
normally, replace it
Instrument cluster memory
B186044 EEPROM Module Error Replace the instrument cluster node
chip communication failure
Instrument cluster
B18A096 Odometer Module Error odometer module memory Replace the instrument cluster node
failure
The instrument cluster
B18D096 SRS Indicator Lamp Failure indicator lamp is faulty Replace the instrument cluster node
(indicator lamp damaged)
The instrument cluster
B18D196 ABS Indicator Lamp Failure indicator lamp is faulty Replace the instrument cluster node
(indicator lamp damaged)

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Electrics (I) 1-527 Driver information system

DTC DTC definition Possible causes Recommended action

The instrument cluster
B18D296 ESP Indicator Lamp Failure indicator lamp is faulty Replace the instrument cluster node
(indicator lamp damaged)
The instrument cluster
Emission Fault Indicator
B18D396 indicator lamp is faulty Replace the instrument cluster node
Lamp Failure
(indicator lamp damaged)
The instrument cluster
B18D496 MIL Failure indicator lamp is faulty Replace the instrument cluster node
(indicator lamp damaged)
The instrument cluster
Transmission Fault Indicator
B18D596 indicator lamp is faulty Replace the instrument cluster node
Lamp Failure
(indicator lamp damaged)
High Engine Coolant The instrument cluster
B18D696 Temperature Indicator Lamp indicator lamp is faulty Replace the instrument cluster node
Failure (indicator lamp damaged)
The instrument cluster
Low Fuel Level Indicator
B18D796 indicator lamp is faulty Replace the instrument cluster node
Lamp Failure
(indicator lamp damaged)
Tire pressure monitoring The instrument cluster
B18D996 system (TPMS) indicator indicator lamp is faulty Replace the instrument cluster node
lamp (indicator lamp damaged)
Parking Brake and Brake The instrument cluster
B18DC96 System Indicator Lamp indicator lamp is faulty Replace the instrument cluster node
Failure (indicator lamp damaged)
1. Check whether the temperature of the display
1. The IP circuit module is is too high due to the abnormal function of the
Instrument Cluster TFT faulty. instrument
B18DD17
Display Overtemperature 2. The IP ambient temperature 2. Check whether the ambient temperature
is too high exceeds the range specified by the display
manufacturer
1. Check for the display hardware failure, and if
1. The IP display hardware is
any, it is recommended to replace the instrument
Instrument Cluster TFT faulty.
B18DD00 cluster node
Display Control Error 2. The IP display software
2. Check for the software failure, and if any, it is
control is faulty.
recommended to update the software
Instrument Cluster TFT Instrument cluster display
B18DD96 Replace the instrument cluster node
Display Backlight Error backlight source fault
Instrument Cluster Audible Instrument cluster audible
B18DE96 Replace the instrument cluster node
Alarm Module Error alarm module drive fault
1. Check whether the TPMS connectors are
connected properly
Lost Communication with The TPMS communication is
U012787 2. Check whether the communication with the
TPMS faulty
TPMS is normal; if the TMPS does not work
normally, replace it
1. Check whether the PCS connector is
connected properly
Lost Communication with The PCS communication is
U025987 2. Check whether the communication with the
PCS faulty
PCS is normal; if the PCS does not work
normally, replace it
1. Check whether the IFC connector is
connected properly
U025887 Lost Communication with IFC IFC communication failure 2. Check whether the communication with the
IFC is normal; if the IFC does not work normally,
replace it
1. Check whether the BSD system connector is
connected firmly
Lost Communication with The BSD system
U11E087 2. Check whether the communication with the
BSD communication is faulty
BSD is normal; if the BSD does not work
normally, replace it

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Driver information system 1-528 Electrics (I)
1.8.4.6 DTC: B180017, B180016

Diagnostic trouble code DTC definition

B180017 KL30 Voltage High
B180016 KL30 Voltage Low

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

Refer to B-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

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Electrics (I) 1-529 Driver information system

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the battery.

A Measure the battery voltage.

Standard voltage: 11~14V
B Verify if the voltage is consistent with the standard
value.

No Charge the battery or check the charging

system.

Yes

Step 3 Check the instrument cluster fuses IF15 and IF19.

A Check whether the fuses IF15 and IF19 are blown.

No Go to step 5.

Yes

Step 4 Check and repair the circuits of fuses IF15 and IF19.

A Check whether the circuits of fuses IF15 and IF19 are

shorted.
B Repair the circuits and check that no short circuit
occurs.
C Replace the fuses with ones of rated current.
The fuses IF15 and IF19 are rated at 10A and 7.5A.
D Verify if the instrument cluster works normally.

Yes The system is working normally.

No

Step 5 Check the power supply circuit of the instrument cluster.

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Driver information system 1-530 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
IG1 power supply
B Disconnect the ICM harness connector IP06.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 14,
16 of the ICM harness connector IP06 and the body
ground.
Standard voltage: 11~14V
E Verify if the voltage is consistent with the standard
Battery power supply
value.

No Repair or replace the harness.

Yes

Step 6 Check the ground circuit of the instrument cluster.

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
GND
B Disconnect the ICM harness connector IP06.
C Measure the resistance of circuit between terminals
31, 32 of the ICM harness connector IP06 and the body
ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GND

Yes

Step 7 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

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Electrics (I) 1-531 Driver information system
1.8.4.7 DTC: B182011, B182012

Diagnostic trouble code DTC definition

B182011 Fuel Circuit Shorted to Ground
B182012 Fuel Circuit Shorted to Power Supply or Open-circuited

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

Fuel level sensor

Fuel pump

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Set the ENGINE START/STOP button to “ON”
position, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

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Driver information system 1-532 Electrics (I)

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check whether the circuit between the fuel pump and the instrument cluster is open.

A Set the ENGINE START/STOP button to “OFF”

Main fuel pump harness connector
position.
Fuel level sensor ground
B Disconnect the fuel pump harness connector BD04.
Fuel level sensor signal
C Disconnect the ICM harness connector IP06.
D Measure the resistance of circuit between terminal 2
of the fuel pump harness connector BD04 and terminal 10
of the ICM harness connector IP06.
E Measure the resistance of circuit between terminal 3
of the fuel pump harness connector BD04 and terminal 7 of
the ICM harness connector IP06.
F Measure the resistance of circuit between terminal 4
Fuel level sensor power
supply of the fuel pump harness connector BD04 and terminal 30
of the ICM harness connector IP06.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

No Replace or repair the harness or

Instrument cluster harness connector
connector.
Fuel level sensor ground
Fuel level sensor power
supply

Fuel level sensor signal

Yes

Step 3 Check whether the fuel pump circuit is shorted to ground.

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Electrics (I) 1-533 Driver information system

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector position.
Fuel level sensor ground
B Disconnect the fuel pump harness connector BD04.
Fuel level sensor power
supply C Disconnect the ICM harness connector IP06.
D Measure the resistance between terminal 7 of the
ICM harness connector IP06 and the body ground.
E Measure the resistance between terminal 10 of the
ICM harness connector IP06 and the body ground.
F Measure the resistance between terminal 30 of the
ICM harness connector IP06 and the body ground.
Standard resistance: 10kΩ or higher
Fuel level sensor signal G Verify if the resistance is consistent with the standard
value.
No Replace or repair the harness or
connector.
Yes

Step 4 Check whether the fuel pump circuit is shorted to power supply.

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector position.
Fuel level sensor ground
B Disconnect the fuel pump harness connector BD04.
Fuel level sensor power
supply
C Disconnect the ICM harness connector IP06.
D Set the ENGINE START/STOP button to “ON”
position.
E Measure the voltage of circuit between terminal 7 of
the ICM harness connector IP06 and the body ground.
F Measure the voltage of circuit between terminal 10 of
the ICM harness connector IP06 and the body ground.
G Measure the voltage of circuit between terminal 30 of
Fuel level sensor signal
the ICM harness connector IP06 and the body ground.
Standard voltage: 0V
H Verify if the voltage is consistent with the standard
value.
No Replace or repair the harness or
connector.
Yes

Step 5 Replace the fuel pump.

A Replace the fuel pump.

B Verify if the fault is eliminated after the fuel pump is
replaced.
Yes The system is working normally.

No

Step 6 Replace the instrument cluster.

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Driver information system 1-534 Electrics (I)

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.8.4.8 DTC: U007388, B186000......

Diagnostic trouble code DTC definition

U007388 Instrument Cluster Node Offline
B186000 Transceiver Fault
U007480 Instrument Cluster in Limphome Mode

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

Refer to B-CAN
system circuit
diagram

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Electrics (I) 1-535 Driver information system
2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN communication circuit.

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
B Disconnect the ICM harness connector IP06.
C Measure the resistance of circuit between terminals 1
and 2 of the ICM harness connector IP06.
D Standard resistance: about 120Ω
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the power and ground wires of instrument cluster.

A Check if the power and ground wires of ICM are

normal.

No Repair or replace the harness.

Yes

Step 4 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

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Driver information system 1-536 Electrics (I)

Next (下一步)

Step 5 End.

1.8.4.9 DTC: U042481, U010187

Diagnostic trouble code DTC definition

U042481 Received HVAC Node Signal Invalid
U010187 Lost Communication with HVAC

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

HVAC control unit

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

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Electrics (I) 1-537 Driver information system

B Start the engine, read the DTC and record it.

C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the instrument cluster and the HVAC control unit.

Instrument cluster harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the HVAC control unit harness connector
IP27.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 4 of the
HVAC control unit harness connector IP27.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 5 of the
HVAC control unit harness connector IP27.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

HVAC control unit harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the HVAC control unit.

A Check whether the power and ground wires of the

HVAC control unit are normal.
No Repair or replace the harness.

Yes

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Driver information system 1-538 Electrics (I)

Step 4 Replace the HVAC control unit.

A Replace the HVAC control unit.

B Verify if the fault is eliminated after the HVAC control unit
is replaced.

Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.10 DTC: U014087

Diagnostic trouble code DTC definition

U014087 Lost Communication with BCM

1. Circuit diagram

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Electrics (I) 1-539 Driver information system

Instrument
panel PDU

Instrument cluster

BCM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the instrument cluster and the BCM.

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Driver information system 1-540 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector position.
B Disconnect the ICM harness connector IP06.
C Disconnect the BCM harness connector IP02.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 43 of the
BCM harness connector IP02.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 42 of the
BCM harness connector IP02.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

BCM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the BCM.

A Check whether the power and ground wires of the

BCM are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the BCM.

A Replace the BCM.

B Verify if the fault is eliminated after the BCM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

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Electrics (I) 1-541 Driver information system

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.11 DTC: U015987

Diagnostic trouble code DTC definition

U015987 Lost Communication with RPA

1. Circuit diagram

Instrument
panel PDU

Instrument cluster RPA ECU

GWM

2. Diagnostic procedure

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Driver information system 1-542 Electrics (I)

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the RPA ECU and the GWM.

GWM harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the RPA ECU harness connector BD03.
C Disconnect the GWM harness connector IP19.
D Measure the resistance between terminal 5 of the
RPA ECU harness connector BD03 and terminal 9 of the
GWM harness connector IP19.
E Measure the resistance between terminal 4 of the
RPA ECU harness connector BD03 and terminal 29 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

RPA ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the instrument cluster and GWM.

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Electrics (I) 1-543 Driver information system

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of the GWM.

A Check whether the power and ground wires of GWM

are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 6 Replace the instrument cluster.

GAC Motor 2023

Driver information system 1-544 Electrics (I)

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.8.4.12 DTC: U132087

Diagnostic trouble code DTC definition

U132087 Lost Communication with PEPS

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

PEPS ECU

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-545 Driver information system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the ICM and the PEPS ECU.

Instrument cluster harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the PEPS ECU harness connector IP58.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 10 of the
PEPS ECU harness connector IP58.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 11 of the
PEPS ECU harness connector IP58.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

PEPS ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the PEPS ECU.

A Check whether the power and ground wires of the

PEPS ECU are normal.

GAC Motor 2023

Driver information system 1-546 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the PEPS ECU.

A Replace the PEPS ECU.

B Verify if the fault is eliminated after the PEPS ECU is
replaced.

Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.13 DTC: U018487

Diagnostic trouble code DTC definition

U018487 Lost Communication with ACU

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-547 Driver information system

Instrument
panel PDU

Instrument cluster

AV control unit
(ACU)

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the instrument cluster and the ACU.

GAC Motor 2023

Driver information system 1-548 Electrics (I)

Instrument cluster harness connector A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the ACU harness connector IP35.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 19 of the
ACU harness connector IP35.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 20 of the
ACU harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the ACU.

A Check whether the power and ground wires of the

ACU are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the ACU.

A Replace the ACU.

B Verify if the fault is eliminated after the ACU is
replaced.

Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

GAC Motor 2023

Electrics (I) 1-549 Driver information system

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.14 DTC: U014687, U044781

Diagnostic trouble code DTC definition

U014687 Lost Communication with GWM
U044781 Received GWM Signal Invalid

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

GWM

GAC Motor 2023

Driver information system 1-550 Electrics (I)
2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the instrument cluster and GWM.

Instrument cluster harness connector A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 33 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 13 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the GWM.

GAC Motor 2023

Electrics (I) 1-551 Driver information system

A Check whether the power and ground wires of GWM

are normal.

No Repair or replace the harness.

Yes

Step 4 Replace the GWM.

A Replace the GWM.

B Verify if the fault is eliminated after the GWM is
replaced.

Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.15 DTC: U020887

Diagnostic trouble code DTC definition

U020887 Lost Communication with MSM

1. Circuit diagram

GAC Motor 2023

Driver information system 1-552 Electrics (I)

Instrument
panel PDU

Instrument cluster

Left front seat

connector

Front seat control

unit

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ICM and the left front seat connector.

GAC Motor 2023

Electrics (I) 1-553 Driver information system

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
B Disconnect the ICM harness connector IP06.
B Disconnect the left front seat adapter harness
connector BD14.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 8 of the left
front seat connector harness connector BD14.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 9 of the left
front seat connector harness connector BD14.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left front seat adapter harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the left front seat connector and the front seat control
unit.

A Set the ENGINE START/STOP button to “OFF”

position.
B Disconnect the left front seat connector harness
connector.
C Disconnect the front seat control unit harness
connector.
D Measure the resistance of circuit between the left
front seat connector harness connector terminal and the
front seat control unit harness connector terminal.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.
No Check the CAN data communication cable
for possible short circuit, open circuit and
false connection, or replace the harness.
Yes

Step 4 Check the power and ground wires of the front seat controller.

A Check whether the power and ground wires of front

seat controller are normal.

GAC Motor 2023

Driver information system 1-554 Electrics (I)

No Repair or replace the harness.

Yes

Step 5 Replace the front seat controller.

A Replace the front seat controller.

B Verify if the fault is eliminated after the front seat
controller is replaced.

Yes The system is working normally.

No

Step 6 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.8.4.16 DTC: U019887

Diagnostic trouble code DTC definition

U019887 Lost Communication with TEL

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-555 Driver information system

Instrument
panel PDU

Instrument cluster

AV control unit
(ACU)

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ICM and the T-BOX ECU (ACU).

GAC Motor 2023

Driver information system 1-556 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector position.
B Disconnect the ICM harness connector IP06.
C Disconnect the T-BOX ECU (ACU) harness connector
IP35.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 19 of the
T-BOX ECU (ACU) harness connector IP35.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 20 of the
T-BOX ECU (ACU) harness connector IP35.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

ACU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the T-BOX ECU (ACU).

A Check whether the power and ground wires of the T-BOX

ECU (ACU) are normal.
No Repair or replace the harness.

Yes

Step 4 Replace the T-BOX ECU (ACU).

A Replace the T-BOX ECU (ACU).

B Verify if the fault is eliminated after the T-BOX ECU
(ACU) is replaced.
Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

GAC Motor 2023

Electrics (I) 1-557 Driver information system

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.17 DTC: B186044, B18A096......

Diagnostic trouble code DTC definition

B186044 EEPROM Module Error
B18A096 Odometer Module Error
B18DD17 Instrument Cluster TFT Display Overtemperature
B18DD00 Instrument Cluster TFT Display Control Error
B18DD96 Instrument Cluster TFT Display Backlight Error
B18DE96 Instrument Cluster Audible Alarm Module Error

1. Circuit diagram

GAC Motor 2023

Driver information system 1-558 Electrics (I)

Instrument
panel PDU

Instrument cluster

Refer to B-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground wires of instrument cluster.

GAC Motor 2023

Electrics (I) 1-559 Driver information system

A Check if the power and ground wires of ICM are

normal.

No Repair or replace the harness.

Yes

Step 3 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.8.4.18 DTC: B18D096, B18D196......

Diagnostic trouble code DTC definition

B18D096 SRS Indicator Lamp Failure
B18D196 ABS Indicator Lamp Failure
B18D296 ESP Indicator Lamp Failure
B18D396 Emission Fault Indicator Lamp Failure
B18D496 MIL Failure
B18D596 Transmission Fault Indicator Lamp Failure
B18D696 High Engine Coolant Temperature Indicator Lamp Failure
B18D796 Low Fuel Level Indicator Lamp Failure
B18D996 Tire pressure monitoring system (TPMS) indicator lamp
B18DC96 Parking Brake and Brake System Indicator Lamp Failure

1. Circuit diagram

GAC Motor 2023

Driver information system 1-560 Electrics (I)

Instrument
panel PDU

Instrument cluster

Refer to B-CAN
system circuit
diagram

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the power and ground wires of instrument cluster.

GAC Motor 2023

Electrics (I) 1-561 Driver information system

A Check if the power and ground wires of ICM are

normal.

No Repair or replace the harness.

Yes

Step 3 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.8.4.19 DTC: U012787

Diagnostic trouble code DTC definition

U012787 Lost Communication with TPMS

1. Circuit diagram

GAC Motor 2023

Driver information system 1-562 Electrics (I)

Instrument
panel PDU

Instrument cluster

TPMS ECU (BCM)

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the ICM and the TPMS ECU (BCM).

GAC Motor 2023

Electrics (I) 1-563 Driver information system

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the TPMS control unit (BCM) harness
connector IP02.
D Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 42 of the
TPMS ECU (BCM) harness connector IP02.
E Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 43 of the
TPMS ECU (BCM) harness connector IP02.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

TPMS ECU (BCM) harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the TPMS ECU (BCM).

A Check if the power and ground wires of the tire pressure

monitoring control unit (BCM) is normal.
No Repair or replace the harness.

Yes

Step 4 Replace the tire pressure monitoring control unit (BCM).

A Replace the tire pressure monitoring control unit (BCM).

B Verify if the fault is eliminated after the tire pressure
monitoring control unit (BCM) is replaced.
Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

GAC Motor 2023

Driver information system 1-564 Electrics (I)

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.20 DTC: U025987

Diagnostic trouble code DTC definition

U025987 Lost Communication with PCS

1. Circuit diagram

Instrument
panel PDU

Instrument cluster

SVM ECU

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-565 Driver information system

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.
No The DTC may be triggered by an
intermittent fault. Check whether there is
any intermittent fault.
Yes

Step 2 Check the CAN data communication cable between the ICM and the FAPA ECU.

GWM harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the FAPA ECU harness connector BD55.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 38 of the
FAPA ECU harness connector BD55.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 18 of the
FAPA ECU harness connector BD55.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

SVM ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the power and ground wires of the FAPA ECU.

A Check whether the power and ground wires of the

FAPA ECU are normal.

GAC Motor 2023

Driver information system 1-566 Electrics (I)

No Repair or replace the harness.

Yes

Step 4 Replace the FAPA ECU.

A Replace the FAPA ECU .

B Verify if the fault is eliminated after the FAPA ECU is
replaced.

Yes The system is working normally.

No

Step 5 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 6 End.

1.8.4.21 DTC: U025887

Diagnostic trouble code DTC definition

U025887 Lost Communication with IFC

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-567 Driver information system

Instrument
panel PDU

Instrument cluster LDW ECU

GWM

2. Diagnostic procedure

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the GWM and the LDW ECU.

GAC Motor 2023

Driver information system 1-568 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

GWM harness connector
position.
B Disconnect the GWM harness connector IP19.
C Disconnect the LDW ECU harness connector BD104.
D Measure the resistance of circuit between terminal 9
of GWM harness connector IP19 and terminal 2 of LDW
ECU harness connector BD104.
E Measure the resistance of circuit between terminal 29
of GWM harness connector IP19 and terminal 3 of LDW
ECU harness connector BD104.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

LDW ECU harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the instrument cluster and GWM.

Instrument cluster harness connector

A Set the ENGINE START/STOP button to “OFF”
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

GAC Motor 2023

Electrics (I) 1-569 Driver information system

GWM harness connector

Yes

Step 4 Check the power and ground wires of LDW ECU.

A Check whether the power and ground wires of LDW

ECU are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the LDW ECU.

A Replace the LDW ECU.

B Verify if the fault is eliminated after the LDW ECU is
replaced.

Yes The system is working normally.

No

Step 6 Replace the instrument cluster.

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.8.4.22 DTC: U11E087

Diagnostic trouble code DTC definition

U11E087 Lost Communication with BSD

GAC Motor 2023

Driver information system 1-570 Electrics (I)
1. Circuit diagram

Instrument
panel PDU

Instrument cluster Left rear BSD ECU

GWM

2. Diagnostic procedure
Caution
This diagnosis is applicable to the left rear BSD main sensor, and can be a reference for the right rear BSD main sensor.

Step 1 Check the DTC status.

A Connect the diagnostic scan tool to the OBD DLC.

B Start the engine, read the DTC and record it.
C Clear the DTC.
D Read the DTC again.
E Check whether the same DTC appears.

GAC Motor 2023

Electrics (I) 1-571 Driver information system

No The DTC may be triggered by an

intermittent fault. Check whether there is
any intermittent fault.

Yes

Step 2 Check the CAN data communication cable between the GWM and the left rear BSD main sensor.

A Set the ENGINE START/STOP button to “OFF”

GWM harness connector position.
B Disconnect the GWM harness connector IP19.
C Disconnect the left rear BSD main sensor harness
connector RB22.
D Measure the resistance of circuit between terminal 9
of the GWM harness connector IP19 and terminal 3 of left
rear BSD main sensor harness connector RB22.
E Measure the resistance of circuit between terminal 29
of the GWM harness connector IP19 and terminal 4 of left
rear BSD main sensor harness connector RB22.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Left rear BSD main sensor harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 3 Check the CAN data communication cable between the instrument cluster and GWM.

GAC Motor 2023

Driver information system 1-572 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Instrument cluster harness connector
position.
B Disconnect the ICM harness connector IP06.
C Disconnect the GWM harness connector IP19.
D Measure the resistance of circuit between terminal 2
of the ICM harness connector IP06 and terminal 13 of the
GWM harness connector IP19.
E Measure the resistance of circuit between terminal 1
of the ICM harness connector IP06 and terminal 33 of the
GWM harness connector IP19.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

GWM harness connector

No Check the CAN data communication cable

for possible short circuit, open circuit and
false connection, or replace the harness.

Yes

Step 4 Check the power and ground wires of the left rear BSD main sensor.

A Check whether the power and ground wires of the left

rear BSD main sensor are normal.

No Repair or replace the harness.

Yes

Step 5 Replace the left rear BSD main sensor.

A Replace the left rear BSD main sensor.

B Verify if the fault is eliminated after the left rear BSD main
sensor is replaced.

Yes The system is working normally.

No

Step 6 Replace the instrument cluster.

GAC Motor 2023

Electrics (I) 1-573 Driver information system

A Replace the instrument cluster.

B Verify if the fault is eliminated after the instrument
cluster is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Driver information system 1-574 Electrics (I)

1.8.5 Removal and installation

1.8.5.1 Removing and installing instrument cluster
display
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the instrument cluster shield and the steering
column upper shroud assembly. Refer to
Maintenance Manual - Body, HVAC
4 Remove the instrument cluster display
a. Undo the fixing clips (arrows A and B), and remove the
instrument cluster shield upper trim panel ①.

b. Unscrew the fixing screws as arrowed, and remove the

instrument cluster display ①.

c. Disconnect the connectors (arrows A and B), and take

out the instrument cluster display ①.

GAC Motor 2023

Electrics (I) 1-575 Driver information system

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, perform the function test of the
instrument cluster display.

GAC Motor 2023

Electric sunshade 1-576 Electrics (I)
1.9 Electric sunshade
1.9.1 Specifications
1.9.1.1 Fastener specifications

Location Specification Tightening torque:Nm

Hexagon head bolt, spring washer
Sunshade assembly 8±2
and plain washer assembly M6×16

GAC Motor 2023

Electrics (I) 1-577 Electric sunshade

1.9.2 System description

1.9.2.1 System description

Open

Close

System overview
1. The electric sunshade adopts independent “ON” and “Off” switches.
2 The smart key controls the opening and closing functions of the sunshade.
3 The voice control function is integrated.
4 The "soft switch" on the center console display controls the opening and closing functions of the sunshade.
Operation mode of sunroof
1. Button operation:
a On the front dome lamp, there are two buttons, that is, “On” and “Off” buttons.
b The buttons are operated in two ways, that is, manual pressing, and pressing and holding.
– If you press the “ON” button, the electric sunshade will move a short distance for slight opening and then stop.
– To close the electric sunshade slightly, press the “OFF” button, and then the electric sunshade will move in the closing
direction for a short distance and then stop.

GAC Motor 2023

Electric sunshade 1-578 Electrics (I)

– To fully opened the electric sunshade, press and hold the “ON” for several seconds, and then the electric sunshade will
automatically move to the fully opened position. (Only applicable to models with sunshade anti-pinch function)
– To fully close the electric sunshade, press and hold the “OFF” button for several seconds, and then the electric
sunshade will automatically move to the fully closed position. (Only applicable to models with sunshade anti-pinch
function)
2. Remote control operation:
a If the ignition is turned to the “OFF” position, the sunshade will be remotely closed when the "Lock" button on the remote
control key is pressed and held. Once the button is released, the closing action will stop.
b If the ignition is turned to the “OFF” position, the sunshade will be remotely opened when the "Unlock" button on the
remote control key is pressed and held. Once the button is released, the opening action will stop.
3. Speech operations: The speech function is designed for opening and closing the sunroof.
1 If you say "Open sunshade", the electric sunshade will be opened.
2 If you say "Close sunshade", the electric sunshade will be closed.
4. "Soft switch" on center console display controls the opening and closing functions of the sunroof
– The opening or closing of the sunshade can be controlled by "soft switch” buttons such as “Slide”, “Sunshade on” and
“Sunshade off” under “My Car” or in 3D vehicle model on the center console display. Please refer to the Owner's Manual
for detailed operations.

GAC Motor 2023

Electrics (I) 1-579 Electric sunshade
1.9.2.2 Initialization of electric sunshade

Open

Close

Initialization cancel methods

1 Disconnect the battery terminals during the operation. (ineffective for some items).
2 Trigger the sunshade anti-pinch function 3 times consecutively. (ineffective for some items).
3. In the fully closed position of the electric sunshade, press and hold the “OFF” button for more than 10s.
4. In the fully open position of the electric sunshade, press and hold the “ON” button for more than 10s.
Note:
The fully closed position herein refers to the electric sunshade position that the module considers.
- For example, if the electric sunshade cannot be closed after reaching one-third of the stroke but the module considers
that the electric sunshade is fully closed, the initialization can be canceled by pressing and holding the “OFF” button for
10s at this time.
- If the electric sunshade is now fully closed but the module does not consider that it is fully closed, the initialization cannot
be canceled by pressing and holding the button for 10s at this time.
Initialization of electric sunshade
1. Press the sunshade “OFF” button, and the sunshade moves to the fully closed position..

GAC Motor 2023

Electric sunshade 1-580 Electrics (I)
2. Press and hold the sunshade “OFF” button, and the sunshade moves to a position of 200mm, and then to the fully
closed position.
3. Release the sunshade “OFF” button to end the initialization of the electric sunshade.

GAC Motor 2023

Electrics (I) 1-581 Electric sunshade
1.9.3 Exploded view
1.9.3.1 Exploded view

Sunshade fabric assembly

Sunshade frame assembly

Sunshade motor

(15 pcs in total)

Tightening torque is measured in N•m

GAC Motor 2023

Electric sunshade 1-582 Electrics (I)
1.9.4 Electrical schematic diagram
1.9.4.1 Electrical schematic diagram
Panorama sunshade (with anti-pinch function)

Front dome lamp

assembly (sunshade
switch)
Panorama sunroof sunshade

To IG1 power supply

Integrated BCM
To BAT power supply

RLS

GAC Motor 2023

Electrics (I) 1-583 Electric sunshade
1.9.4.2 Electrical schematic diagram
Panorama sunshade (without anti-pinch function)

Panorama sunroof
sunshade
Panorama sunroof sunshade

To BAT power supply

GAC Motor 2023

Electric sunshade 1-584 Electrics (I)
1.9.5 Diagnostic information and procedure
1.9.5.1 Diagnostic instructions
Familiarize yourself with the system functions and operations before starting the system diagnosis. This helps correctly
determine the diagnostic procedure when a fault occurs, and more importantly, helps determine whether the situation
described by the customer is normal.
1.9.5.2 Visual inspection
1 Check for the aftermarket parts that may affect the operation of the sunroof system.
2 Check the accessible or visible system components for obvious damage or conditions which may cause faults.
3 Check whether the initialization of the sunroof has failed.
1.9.5.3 Panorama sunroof sunshade failure to work
1. Circuit diagram

Instrument
panel PDU

Panorama sunroof sunshade

Sunroof - Open Sunroof - Close GND

Sunroof - Open Sunroof - Close

Integrated BCM Front dome lamp assembly (sunroof switch)
Backlight power output Backlight GND

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-585 Electric sunshade
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.
Step 1 Check the panorama sunroof sunshade ECU fuses IF23 and IF56.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses IF23 and IF56 and check whether
they are blown.
The fuses IF23 and IF56 are rated at 7.5A and 20A.
Yes Check and repair the fuse circuit and
replace it with a fuse of rated capacity.
No

Step 2 Check the power supply circuit of the panorama sunroof sunshade ECU.

A Set the ENGINE START/STOP button to “OFF”

Panorama sunroof sunshade harness connector position.
Battery power supply
B Disconnect the panorama sunroof sunshade ECU
harness connector BD90.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 3, 10
of the panorama sunroof sunshade ECU harness
connector BD90 and the body ground.
Standard voltage: 11~14V
E Verify if the voltage is consistent with the standard
IG1 power supply
value.
No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the panorama sunroof sunshade ECU.

A Set the ENGINE START/STOP button to “OFF”

Panorama sunroof sunshade harness connector
position.
GND B Disconnect the panorama sunroof sunshade ECU
harness connector BD90.
C Measure the resistance of circuit between terminal 5
of the panorama sunroof sunshade ECU harness
connector BD90 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

GAC Motor 2023

Electric sunshade 1-586 Electrics (I)

Step 4 Check whether the circuit between the panorama sunroof sunshade ECU and the sunroof switch (front dome
lamp assembly) is open.

A Set the ENGINE START/STOP button to “OFF”

Panorama sunroof sunshade harness connector
position.
B Disconnect the panorama sunroof sunshade ECU
Sunroof on harness connector BD90.
C Disconnect the sunroof switch (front dome lamp
assembly) harness connector BD96.
D Measure the resistance of circuit between terminal 2
of the panorama sunroof sunshade ECU harness
connector BD90 and terminal 7 of the sunroof switch (front
dome lamp assembly) harness connector BD96.
E Measure the resistance of circuit between terminal 7
of the panorama sunroof sunshade ECU harness
connector BD90 and terminal 8 of the sunroof switch (front
Sunroof off dome lamp assembly) harness connector BD96.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.
Front dome lamp assembly harness connector

Sunroof on

No Repair or replace the harness.

Sunroof off

Yes

Step 5 Check the ground circuit of the sunroof switch (front dome lamp assembly).

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector position.
B Disconnect the sunroof switch (front roof lamp
GND assembly) harness connector BD96.
C Measure the resistance between terminal 5 of the
sunroof switch (front roof lamp assembly) harness
connector BD96 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

GAC Motor 2023

Electrics (I) 1-587 Electric sunshade

Step 6 Replace the sunroof switch (front dome lamp assembly).

A Replace the sunroof switch (front roof lamp

assembly).
B Verify if the fault is eliminated after the sunroof switch
(front roof lamp assembly) is replaced.

Yes The system is working normally.

No

Step 7 Replace the panorama sunroof sunshade.

A Replace the panorama sunroof sunshade.

B Verify if the fault is eliminated after the panorama sunroof
sunshade is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.9.5.4 Panorama sunroof sunshade failure to be opened

1. Circuit diagram

GAC Motor 2023

Electric sunshade 1-588 Electrics (I)

Instrument
panel PDU

Panorama sunroof sunshade

Sunroof - Open Sunroof - Close GND

Sunroof - Open Sunroof - Close

Integrated BCM Front dome lamp assembly (sunroof switch)
Backlight power output Backlight GND

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.
Step 1 Check the sunroof switch (front dome lamp assembly).

A Set the ENGINE START/STOP button to “OFF”

position.
B Remove the sunroof switch (front dome lamp
assembly).
C Operate the sunroof switch to set it to “ON” position.
D Check the continuity of the internal circuit between
terminals 7 and 5 of the sunroof switch (front dome lamp
assembly).

No Replace the sunroof switch (front dome

lamp assembly).

Yes

GAC Motor 2023

Electrics (I) 1-589 Electric sunshade

Step 2 Check the circuit between the sunroof switch (front dome lamp assembly) and the panorama sunroof
sunshade.

A Set the ENGINE START/STOP button to “OFF”

Panorama sunroof sunshade harness connector position.
B Disconnect the panorama sunroof sunshade harness
Sunroof on connector BD90.
C Disconnect the sunroof switch (front dome lamp
assembly) harness connector BD96.
D Measure the resistance of circuit between terminal 2
of the panorama sunroof sunshade harness connector
BD90 and terminal 7 of the sunroof switch (front dome lamp
assembly) harness connector BD96.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
Sunroof off value.

Front dome lamp assembly harness connector

Sunroof on

No Repair or replace the harness.

Sunroof off

Yes

Step 3 Check the ground circuit of the sunroof switch (front dome lamp assembly).

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector position.
GND
B Disconnect the sunroof switch (front roof lamp
assembly) harness connector BD96.
C Measure the resistance between terminal 5 of the
sunroof switch (front roof lamp assembly) harness
connector BD96 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

GAC Motor 2023

Electric sunshade 1-590 Electrics (I)

Step 4 Replace the panorama sunroof sunshade.

A Replace the panorama sunroof sunshade.

B Verify if the fault is eliminated after the panorama sunroof
sunshade is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

1.9.5.5 Panorama sunroof sunshade failure to be closed

1. Circuit diagram

Instrument
panel PDU

Panorama sunroof sunshade

Sunroof - Open Sunroof - Close GND

Sunroof - Open Sunroof - Close

Integrated BCM Front dome lamp assembly (sunroof switch)
Backlight power output Backlight GND

2. Diagnostic procedure

GAC Motor 2023

Electrics (I) 1-591 Electric sunshade

Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the sunroof switch (front dome lamp assembly).

A Set the ENGINE START/STOP button to “OFF”

position.
B Remove the sunroof switch (front dome lamp
assembly).
C Operate the sunroof switch to set it to “OFF” position.
D Check the continuity of the internal circuit between
terminals 5 and 8 of the sunroof switch (front dome lamp
assembly).

No Replace the sunroof switch (front dome

lamp assembly).

Yes

Step 2 Check the circuit between the sunroof switch (front dome lamp assembly) and the panorama sunroof
sunshade.

A Set the ENGINE START/STOP button to “OFF”

Panorama sunroof sunshade harness connector
position.

Sunroof on B Disconnect the panorama sunroof sunshade harness

connector BD90.
C Disconnect the sunroof switch (front dome lamp
assembly) harness connector BD96.
D Measure the resistance of circuit between terminal 7
of the panorama sunroof sunshade harness connector
BD90 and terminal 8 of the sunroof switch (front dome lamp
assembly) harness connector BD96.
Standard resistance: less than 1Ω
Sunroof off
E Verify if the resistance is consistent with the standard
value.

Front dome lamp assembly harness connector

Sunroof on

No Repair or replace the harness.

Sunroof off

Yes

Step 3 Check the ground circuit of the sunroof switch (front dome lamp assembly).

GAC Motor 2023

Electric sunshade 1-592 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Front dome lamp assembly harness connector position.
GND B Disconnect the sunroof switch (front roof lamp
assembly) harness connector BD96.
C Measure the resistance between terminal 5 of the
sunroof switch (front roof lamp assembly) harness
connector BD96 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Replace the panorama sunroof sunshade.

A Replace the panorama sunroof sunshade.

B Verify if the fault is eliminated after the panorama sunroof
sunshade is replaced.

Yes The system is working normally.

Next (下一步)

Step 5 End.

GAC Motor 2023

Electrics (I) 1-593 Electric sunshade

1.9.6 Removal and installation

1.9.6.1 Removing and installing sunshade motor
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the roof assembly (panorama sunroof).
Refer to Maintenance Manual - Body, HVAC

4 Remove the sunshade motor

a. Disconnect the connector (arrow A) of the sunshade
motor.
b. Unscrew the fixing bolts (arrow B), and take out the
sunshade motor ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether the operation of the
sunshade motor is normal.

GAC Motor 2023

Electric sunshade 1-594 Electrics (I)

1.9.6.2 Removing and installing sunshade fabric

assembly
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the roof assembly (panorama sunroof).
Refer to Maintenance Manual - Body, HVAC
4 Remove the interior monitoring radar. Refer to
Maintenance Manual - Electrics (III)
5 Remove the sunshade motor. Refer to 1.9.6.1 Removing
and installing sunshade motor
6 Remove the sunshade assembly. Refer to 1.9.6.3
Removing and installing sunshade assembly
7 Remove the sunshade fabric assembly
a. Take out the flexible shaft fixing piece ①.

b. Remove the flexible shaft sleeve ① and ②.

c. Pull the flexible shafts on both sides at the same time,
and manually gather the sunshade fabric assembly until it
is fully opened.
Note:
The above steps applies when the sunshade fabric
assembly are not fully opened before the removal, in which
case the sunshade fabric assembly needs to be manually
gathered to the fully open position.

d. Unscrew the fixing bolts as arrowed, and detach the

sunshade fabric assembly ① and the sunshade frame
assembly ②.

GAC Motor 2023

Electrics (I) 1-595 Electric sunshade

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, check whether the sunshade fabric
assembly is installed in place.
– Check whether the left and right sides of the sunshade
fabric assembly are at the same height, if not, readjust.
1.9.6.3 Removing and installing sunshade assembly
Removal procedure
1 Turn off all electrical consumers, and turn off the
ENGINE START/STOP button.
2 Disconnect the negative battery terminal. Refer to
Maintenance Manual - 4A15J2 Engine (I)
3 Remove the roof assembly (glass canopy). Refer to
Maintenance Manual - 4A15J2 Engine (I)
4 Remove the interior monitoring radar. Refer to
Maintenance Manual - 4A15J2 Engine (I)
5 Remove the sunshade motor. Refer to Maintenance
Manual - 4A15J2 Engine (I)

6 Remove the sunshade assembly

a. Undo the harness fixing clips (arrow A).
b. Unscrew the rear fixing bolt (arrow B) of the sunshade
assembly.
• Tightening torque of bolt (arrow B): 8±2N·m

c. Unscrew the fixing bolts as arrowed, and remove the

sunshade assembly ①.
• Tightening torque of bolt: 8±2N·m

Installation procedure
The installation procedure is in reverse of removal
procedure.

GAC Motor 2023

Central locking 1-596 Electrics (I)
1.10 Central locking
1.10.1 Specifications
1.10.1.1 Fastener specifications

Location Specification Tightening torque:Nm

Left front door lock assembly
Right front door lock assembly
Door lock fastening screw M6×18 6±1
Left rear door lock assembly
Right rear door lock assembly
Hexagon lobular socket countersunk
Door lock catch 22±2
head screw M8×20

GAC Motor 2023

Electrics (I) 1-597 Central locking

1.10.2 System description

1.10.2.1 System description
System overview
The central locking system is mainly composed of integrated BCM, door module, lock motors of four doors, central locking
switch, etc. The opening and closing of the doors can be controlled on the driver's door.
Operation instruction
Remote unlocking and locking: When a valid request of remote unlocking or locking is received, the doors can be
unlocked or locked.
Unlocking and locking by central locking switch: The doors can be unlocked or locked by the central locking switch.
Unlocking and locking by mechanical key: Turn the key anticlockwise to unlock the driver’s door only; turn the key
clockwise to lock all the doors.
Thermal protection of lock motor: The lock will be deactivated for 5s after being operated continuously for 7 times in 12s.
Proximity unlocking: When a request of proximity unlocking is received from the integrated BCM, the doors can be
unlocked.
Locking upon leaving: When a request of locking upon leaving is received from the integrated BCM, the doors can be
locked.
Speed sensing door lock: When the four doors are closed and the vehicle reaches a certain speed or the vehicle runs a
certain time, the automatic locking is triggered.
Auto unlock after shutdown: When the vehicle is locked, the doors will be unlocked if the power switch is turned from “ON”
position to “OFF” position.
Automatic relocking: When the vehicle is locked, if the vehicle status remains unchanged within 30s after the remote
unlocking/proximity unlocking/ passive unlocking command is received, the doors will be relocked automatically.

GAC Motor 2023

Central locking 1-598 Electrics (I)
1.10.3 Location of components
1.10.3.1 Location of components

Front door lock

assembly

Door lock catch

Rear door lock

assembly

Door lock catch

GAC Motor 2023

Electrics (I) 1-599 Central locking
1.10.4 Electrical schematic diagram
1.10.4.1 Electrical schematic diagram

CAN signal Left front

Unlock door lock
motor

Lock
EPS ECU
Anti-theft
Instrument cluster command
Left front door
locking status
Collision
SRS ECU signal

Unlock Right
front door
Remote control RF lock
Lock motor
Smart key signal

Right front
Left front door trim panel Key signal door locking
interior search antenna status

Unlock
Key signal Left rear
Right front door trim panel door lock
interior search antenna Lock motor
Low-frequency signal

Interior search antenna Key signal

(console) Unlock
Right rear
BCM

door lock
Key signal Lock motor
Interior search antenna
(trunk)

Interior search antenna Key signal

(rear bumper side) Liftgate
lock
assembly

Status switch

Engine hood ajar switch

Left instrument panel
switch block (PLG
switch)
Left turn signal lamp

Unlock
Left front door Left front door control
centralized control module Right turn signal lamp
Lock
switch

Horn

GAC Motor 2023

Central locking 1-600 Electrics (I)
1.10.5 Diagnostic information and procedure
1.10.5.1 Diagnostic instructions
Familiarize yourself with the system functions and operations before starting the system diagnosis. This helps correctly
determine the diagnostic procedure when a fault occurs, and more importantly, helps determine whether the situation
described by the customer is normal.
1.10.5.2 Visual inspection
1 Check the aftermarket parts that may affect the performance of the central locking system.
2 Check the accessible or visible system components for obvious damage or conditions which may cause faults.
3 If the door lock fails to work, check and repair the poor contact or open circuit at the power supply or ground circuit
before replacing the door lock.
1.10.5.3 Intelligent remote control key function failure
Diagnostic procedure
Caution
This diagnosis process is applicable to the case that the remote control key fails to lock/unlock all the doors and the
central locking switch functions normally.

Step 1 Check the battery voltage of the smart key.

A Set the ENGINE START/STOP button to “OFF”

position.
B Remove the battery of the smart key.
C Measure the battery voltage with a multimeter.
Standard voltage: 2.17~3.6V
D Verify if the voltage is consistent with the standard value.

No Replace the battery of the smart key.

Yes

Step 2 Replace the smart key.

A Replace the smart key and match the new one.

B Verify if the fault is eliminated after the smart key is
replaced.

Yes The system is working normally.

Next (下一步)

Step 3 End.

1.10.5.4 Central locking switch function failure

Caution
This diagnostic procedure is applicable to the case that the remote control key functions normally (i.e. locks/unlocks the
doors normally) but the central locking switch fails to lock/unlock all the doors.
1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-601 Central locking

Instrument
panel PDU

Left front door control module

Unlock Lock GND

Left front door centralized control switch

Diagnostic procedure
Step 1 Check the circuit between the left front door centralized control switch and the left front door control module.

A Set the ENGINE START/STOP button to “OFF”

Left front door centralized control switch harness
connector position.
Locking signal of central B Disconnect the left front door centralized control
locking switch harness connector DD01.
C Disconnect the left front door control module harness
connector DD20.
D Measure the resistance of circuit between terminal 5
of the left front door centralized control switch harness
connector DD01 and terminal 12 of the left front door
control module harness connector DD20.
E Measure the resistance of circuit between terminal 7
of the left front door centralized control switch harness
connector DD01 and terminal 10 of the left front door
control module harness connector DD20.
Unlocking signal of GND F Measure the resistance of circuit between terminal 12
central locking of the left front door centralized control switch harness
connector DD01 and terminal 35 of the left front door
control module harness connector DD20.
Standard resistance: less than 1Ω
G Verify if the resistance is consistent with the standard
value.

GAC Motor 2023

Central locking 1-602 Electrics (I)

Left front door control module harness connector

Unlocking signal of Locking signal of central

central locking locking

No Repair or replace the harness.

Left front door centralized

control switch ground

Yes

Step 2 Replace the left front door centralized control switch.

A Replace the left front door centralized control switch.

B Verify if the fault is eliminated after the left front door
centralized control switch is replaced.

Yes The system is working normally.

No

Step 3 Replace the left front door control module.

A Replace the left front door control module.

B Verify if the fault is eliminated after the left front door
control module is replaced.

Yes The system is working normally.

Next (下一步)

Step 4 End.

1.10.5.5 Central locking system failure to lock/unlock doors

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-603 Central locking

Instrument
panel PDU Left rear Right
door lock rear door
motor lock
motor

Integrated BCM

Left front Right front

door lock door lock
motor motor

Diagnostic procedure

Step 1 Check the IMMO system.

A Check the anti-theft system for the possible fault and

repair it.
B Verify if the electric door lock is locked normally.

Yes The system is working normally.

No

Step 2 Check the door lock fuses IF31 and IF33.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses IF31 and IF33 and check whether
they are blown.
The fuses IF31 and IF33 are rated at 20A and 20A
respectively.

GAC Motor 2023

Central locking 1-604 Electrics (I)

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

Step 3 Check the power supply circuit of the door lock.

Integrated BCM harness connector A Set the ENGINE START/STOP button to “OFF”
position.
Integrated BCM power supply (door lock) B Disconnect the integrated BCM harness connector
FB30.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 8, 11 of
the integrated BCM harness connector FB30 and the body
ground.
Standard voltage: 11-14 V

Integrated BCM power supply (door lock) E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check the ground circuit of the door lock.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
GND B Disconnect the integrated BCM harness connectors
FB30 and IP75.
C Measure the resistance of circuit between terminal A7 of
the integrated BCM harness connector IP75 and the body
ground.
D Measure the resistance of circuit between terminal 5 of
the integrated BCM harness connector FB30 and the body
ground.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

GAC Motor 2023

Electrics (I) 1-605 Central locking

Integrated BCM harness connector

GND

Yes

Step 5 Replace the door lock.

A Replace the door lock.

B Verify if the fault is eliminated after the door lock is
replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.10.5.6 Trunk lid lock failure to be unlocked

1. Circuit diagram

GAC Motor 2023

Central locking 1-606 Electrics (I)

Instrument
panel PDU

Integrated BCM

Liftgate
switch

switch
Status

Liftgate lock
Motor
assembly

Diagnostic procedure
Caution
This section describes the faults of models without PLG, and the fault diagnostic procedures of models with PLG are
similar.

Step 1 Check the PLG switch.

A Check whether the PLG switch is normal

No Replace the PLG switch.

Yes

Step 2 Check the circuit between the PLG switch and the integrated BCM.

GAC Motor 2023

Electrics (I) 1-607 Central locking

A Set the ENGINE START/STOP button to “OFF”

PLG switch harness connector position.
Signal
B Disconnect the liftgate switch harness connector TK07.
C Disconnect the integrated BCM harness connector
BD11.
D Measure the resistance of circuit between terminal 2
of the PLG switch harness connector TK07 and terminal 29
of the integrated BCM harness connector BD11.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Liftgate switch signal

No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the PLG switch.

A Set the ENGINE START/STOP button to “OFF”

PLG switch harness connector
position.
GND
B Disconnect the liftgate switch harness connector TK07.
C Measure the resistance between terminal 1 of the
PLG switch harness connector TK07 and the body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 4 Check the circuit between the PLG lock assembly and the BCM.

GAC Motor 2023

Central locking 1-608 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

PLG lock assembly harness connector position.
B Disconnect the liftgate lock assembly harness
PLG lock motor power supply
connector TK01.
C Disconnect the integrated BCM harness connector
IP75.
D Measure the resistance of circuit between terminal 2
of the PLG lock assembly harness connector TK01 and
terminal B16 of the integrated BCM harness connector
IP75.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

PLG lock motor power supply

Yes

Step 5 Check the ground circuit of the liftgate lock assembly.

A Set the ENGINE START/STOP button to “OFF”

PLG lock assembly harness connector
position.
PLG lock motor ground B Disconnect the liftgate lock assembly harness
connector TK01.
C Measure the resistance of circuit between terminal 1
of the PLG lock assembly harness connector TK01 and the
body ground.
Standard resistance: less than 1Ω
D Verify if the resistance is consistent with the standard
value.
No Repair or replace the harness.

Yes

Step 6 Replace the PLG lock assembly.

GAC Motor 2023

Electrics (I) 1-609 Central locking

A Replace the PLG lock assembly.

B Verify if the fault is eliminated after the PLG lock
assembly is replaced.

Yes The system is working normally.

No

Step 7 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 8 End.

1.10.5.7 Left front door lock failure to work

1. Circuit diagram

GAC Motor 2023

Central locking 1-610 Electrics (I)

Instrument
panel PDU Left rear Right
door lock rear door
motor lock
motor

Integrated BCM

Left front Right front

door lock door lock
motor motor

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the door lock fuses IF31 and IF33.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses IF31 and IF33 and check whether
they are blown.
The fuses IF31 and IF33 are rated at 20A and 20A
respectively.

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

Step 2 Check the power supply circuit of the door lock.

GAC Motor 2023

Electrics (I) 1-611 Central locking

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
Integrated BCM power supply (door lock) B Disconnect the integrated BCM harness connector
FB30.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 8, 11 of
the integrated BCM harness connector FB30 and the body
ground.
Standard voltage: 11-14 V
Integrated BCM power supply (door lock) E Verify if the voltage is consistent with the standard
value.

No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the door lock.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
GND B Disconnect the integrated BCM harness connectors
FB30 and IP75.
C Measure the resistance of circuit between terminal A7 of
the integrated BCM harness connector IP75 and the body
ground.
D Measure the resistance of circuit between terminal 5 of
the integrated BCM harness connector FB30 and the body
ground.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

GND

Yes

Step 4 Check the circuit between the left front door lock motor and the integrated BCM.

GAC Motor 2023

Central locking 1-612 Electrics (I)

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
B Disconnect the integrated BCM harness connector
Left front door unlocking signal
IP75.
C Disconnect the left front door lock motor harness
connector DD02.
D Measure the resistance of circuit between terminal A1 of
the integrated BCM harness connector IP75 and terminal 7
of the left front door lock motor harness connector DD02.
E Measure the resistance of circuit between terminal A2 of
the integrated BCM harness connector IP75 and terminal 5
of the left front door lock motor harness connector DD02.
Standard resistance: less than 1Ω
Door locking signal F Verify if the resistance is consistent with the standard
value.

Left front door lock motor harness connector

Left front door unlocking signal

No Repair or replace the harness.

Left front door locking signal

Yes

Step 5 Replace the left front door lock motor.

A Replace the left front door lock motor.

B Verify if the fault is eliminated after the left front door lock
motor is replaced.
Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.
Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-613 Central locking

1.10.5.8 Right front door lock failure to work

1. Circuit diagram

Instrument
panel PDU Left rear Right
door lock rear door
motor lock
motor

Integrated BCM

Left front Right front

door lock door lock
motor motor

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the door lock fuses IF31 and IF33.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses IF31 and IF33 and check whether
they are blown.
The fuses IF31 and IF33 are rated at 20A and 20A
respectively.

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

GAC Motor 2023

Central locking 1-614 Electrics (I)

No

Step 2 Check the power supply circuit of the door lock.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connector
Integrated BCM power supply (door
lock) FB30.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 8, 11 of
the integrated BCM harness connector FB30 and the body
ground.
Standard voltage: 11-14 V
E Verify if the voltage is consistent with the standard
value.
Integrated BCM power supply (door
lock) No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the door lock.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
B Disconnect the integrated BCM harness connectors
GND
FB30 and IP75.
C Measure the resistance of circuit between terminal A7 of
the integrated BCM harness connector IP75 and the body
ground.
D Measure the resistance of circuit between terminal 5 of
the integrated BCM harness connector FB30 and the body
ground.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

GND

GAC Motor 2023

Electrics (I) 1-615 Central locking

Yes

Step 4 Check the circuit between the right front door lock motor and the integrated BCM.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector position.
B Disconnect the integrated BCM harness connectors
FB30 and IP75.
C Disconnect the right front door lock motor harness
connector PD02.
D Measure the resistance of circuit between terminal A2 of
the integrated BCM harness connector IP75 and terminal 3
of the right front door lock motor harness connector PD02.
E Measure the resistance of circuit between terminal 12 of
the integrated BCM harness connector FB30 and terminal 1
of the right front door lock motor harness connector PD02.
Door locking signal
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Door unlocking signal

No Repair or replace the harness.

Right front door lock motor harness connector

Right front door unlocking

signal

Right front door locking signal

Yes

Step 5 Replace the right front door lock motor.

GAC Motor 2023

Central locking 1-616 Electrics (I)

A Replace the right front door lock motor.

B Verify if the fault is eliminated after the right front door
lock motor is replaced.

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.10.5.9 Left rear door lock failure to work

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-617 Central locking

Instrument
panel PDU Left rear Right
door lock rear door
motor lock
motor

Integrated BCM

Left front Right front

door lock door lock
motor motor

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the door lock fuses IF31 and IF33.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses IF31 and IF33 and check whether
they are blown.
The fuses IF31 and IF33 are rated at 20A and 20A
respectively.

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

Step 2 Check the power supply circuit of the door lock.

GAC Motor 2023

Central locking 1-618 Electrics (I)

Integrated BCM harness connector A Set the ENGINE START/STOP button to “OFF”
position.
Integrated BCM power supply (door B Disconnect the integrated BCM harness connector
lock) FB30.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 8, 11 of
the integrated BCM harness connector FB30 and the body
ground.
Standard voltage: 11-14 V

Integrated BCM power supply (door E Verify if the voltage is consistent with the standard
lock) value.

No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the door lock.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
GND B Disconnect the integrated BCM harness connectors
FB30 and IP75.
C Measure the resistance of circuit between terminal A7 of
the integrated BCM harness connector IP75 and the body
ground.
D Measure the resistance of circuit between terminal 5 of
the integrated BCM harness connector FB30 and the body
ground.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

GND

Yes

Step 4 Check the circuit between the left rear door lock motor and the integrated BCM.

GAC Motor 2023

Electrics (I) 1-619 Central locking

A Set the ENGINE START/STOP button to “OFF”

Left rear door lock motor harness connector position.
Left rear door unlocking signal B Disconnect the left rear door lock motor harness
connector LD03.
C Disconnect the integrated BCM harness connectors
FB30 and IP75.
D Measure the resistance of circuit between terminal 3
of the left rear door lock motor harness connector LD03 and
terminal 12 of the integrated BCM harness connector FB30.
E Measure the resistance of circuit between terminal 4
of the left rear door lock motor harness connector LD03 and
terminal A2 of the integrated BCM harness connector IP75.
Left rear door locking signal Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Door locking signal

No Repair or replace the harness.

Integrated BCM harness connector

Door unlocking signal

Yes

Step 5 Replace the left rear door lock motor.

A Replace the left rear door lock motor.

B Verify if the fault is eliminated after the left rear door lock
motor is replaced.

GAC Motor 2023

Central locking 1-620 Electrics (I)

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

1.10.5.10 Right rear door lock failure to work

1. Circuit diagram

GAC Motor 2023

Electrics (I) 1-621 Central locking

Instrument
panel PDU Left rear Right
door lock rear door
motor lock
motor

Integrated BCM

Left front Right front

door lock door lock
motor motor

2. Diagnostic procedure
Caution
This diagnosis is applicable to premium and above models, and can be a reference for the basic models.

Step 1 Check the door lock fuses IF31 and IF33.

A Set the ENGINE START/STOP button to “OFF”

position.
B Unplug the fuses IF31 and IF33 and check whether
they are blown.
The fuses IF31 and IF33 are rated at 20A and 20A
respectively.

Yes Check and repair the fuse circuit and

replace it with a fuse of rated capacity.

No

Step 2 Check the power supply circuit of the door lock.

GAC Motor 2023

Central locking 1-622 Electrics (I)

Integrated BCM harness connector A Set the ENGINE START/STOP button to “OFF”
position.
Integrated BCM power supply (door B Disconnect the integrated BCM harness connector
lock) FB30.
C Set the ENGINE START/STOP button to “ON”
position.
D Measure the voltage of circuit between terminals 8, 11 of
the integrated BCM harness connector FB30 and the body
ground.
Standard voltage: 11-14 V

Integrated BCM power supply (door E Verify if the voltage is consistent with the standard
lock) value.

No Repair or replace the harness.

Yes

Step 3 Check the ground circuit of the door lock.

A Set the ENGINE START/STOP button to “OFF”

Integrated BCM harness connector
position.
GND B Disconnect the integrated BCM harness connectors
FB30 and IP75.
C Measure the resistance of circuit between terminal A7 of
the integrated BCM harness connector IP75 and the body
ground.
D Measure the resistance of circuit between terminal 5 of
the integrated BCM harness connector FB30 and the body
ground.
Standard resistance: less than 1Ω
E Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

No Repair or replace the harness.

GND

Yes

Step 4 Check the circuit between the right rear door lock motor and the integrated BCM.

GAC Motor 2023

Electrics (I) 1-623 Central locking

A Set the ENGINE START/STOP button to “OFF”

Right rear door lock motor harness connector position.
Right rear door locking signal B Disconnect the right rear door lock motor harness
connector RD03.
C Disconnect the integrated BCM harness connectors
FB30 and IP75.
D Measure the resistance of circuit between terminal 5
of the right rear door lock motor harness connector RD03
and terminal 12 of the integrated BCM harness connector
FB30.
E Measure the resistance of circuit between terminal 4
of the right rear door lock motor harness connector RD03
and terminal A2 of the integrated BCM harness connector
Right rear door unlocking signal
IP75.
Standard resistance: less than 1Ω
F Verify if the resistance is consistent with the standard
value.

Integrated BCM harness connector

Door locking signal

No Repair or replace the harness.

Integrated BCM harness connector

Door unlocking signal

Yes

Step 5 Replace the right rear door lock motor.

A Replace the right rear door lock motor.

B Verify if the fault is eliminated after the right rear door lock
motor is replaced.

GAC Motor 2023

Central locking 1-624 Electrics (I)

Yes The system is working normally.

No

Step 6 Replace the integrated BCM.

A Replace the integrated BCM.

B Verify if the fault is eliminated after the integrated
BCM is replaced.

Yes The system is working normally.

Next (下一步)

Step 7 End.

GAC Motor 2023

Electrics (I) 1-625 Central locking

1.10.6 Removal and installation

1.10.6.1 Removing and installing front door lock
assembly
Removal procedure
Note:
This section describes the removal and installation of left
front door lock assembly, and the right front door lock
assembly may be removed and installed by reference to left
one.
1 Remove the front door trim panel assembly. Refer to
Maintenance Manual - Body, HVAC
2 Remove the front door water shield. Refer to
Maintenance Manual - Body, HVAC
3 Remove the left front door window assembly. Refer to
Maintenance Manual - Electrics (II)
4 Remove the left front door window regulator
assembly. Refer to Maintenance Manual - Electrics
(II)

5 Remove the front door lock assembly

a. Undo the fixing clip (arrow A), and detach the push rod
① of the left front door lock cylinder assembly.
b. Detach the cable from the front door outside handle
assembly (arrows B and C).

GAC Motor 2023

Central locking 1-626 Electrics (I)

c. Unscrew the fixing screws (arrow A) of the front door lock

assembly.
d. Undo the cable fixing clip (arrow B) and remove the front
door lock assembly.
• Tightening torque of screw (arrow A): 6±1N·m

e. Disconnect the connector as arrowed, and take out the

front door lock assembly ①.

Installation procedure
The installation procedure is in reverse of removal
procedure, and the following points apply:
– After the installation, perform the function test of the front
door lock assembly.

GAC Motor 2023

Electrics (I) 1-627 Central locking

1.10.6.2 Removing and installing rear door lock

assembly
Removal procedure
Note:
This section describes the removal and installation of left
rear door assembly, and the right rear door assembly may
be removed and installed by reference to left one.
1 Remove the rear door window run channel. Refer to
Maintenance Manual - Electrics (II)

2 Remove the rear door lock assembly

a. Undo the cable fixing clip (arrow A).
b. Detach the cable from the rear door outside handle
assembly (arrows B and C).

c. Unscrew the fixing screws as arrowed, and remove the

rear door lock assembly.
• Tightening torque of screw: 6±1N·m

d. Disconnect the connector as arrowed, and take out the

rear door lock assembly ①.

Installation procedure

GAC Motor 2023

Central locking 1-628 Electrics (I)

The installation procedure is in reverse of removal

procedure, and the following points apply:
– After the installation, perform the function test of the rear
door lock assembly.
1.10.6.3 Removing and installing door lock catch
Removal procedure
Note:
This section describes the removal and installation of left
front door lock catch, and other door lock catches may be
removed and installed by reference to left one.
1 Open the left front door.

2 Remove the door lock catch

a. Unscrew the fixing screws as arrowed, and remove the
door lock catch ①.
• Tightening torque of screw: 22±2N·m

Installation procedure
The installation procedure is in reverse of removal
procedure.

GAC Motor 2023