2006 Cadillac XLR

2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

2006 TRANSMISSION

Automatic Transmission - 6L80E - XLR

SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

Specification
Application Ref No. Quantity Size Metric English
Auxiliary Transmission Oil
- - - 25 N.m 18 lb ft
Cooler Quick Connect Fittings
Auxiliary Transmission Oil
- - - 25 N.m 18 lb ft
Cooler Brace to Skid Bar Bolt
Auxiliary Transmission Oil
- - - 8 N.m 71 lb in
Cooler Bracket to Body Nuts
Auxiliary Transmission Oil
Cooler to Bracket Mounting - - - 22 N.m 16 lb ft
Bolts
Control Solenoid Valve
Assembly and Control Valve
Lower Body Assembly to 310 6 M5x0.8x55 8 N.m 71 lb in
Control Valve Upper Body
Assembly
Control Solenoid Valve
Assembly and Control Valve
Lower Body Assembly to 309 10 M5x0.8x45 8 N.m 71 lb in
Control Valve Upper Body
Assembly
Control Solenoid Valve Heat
312 2 M5x0.8x53 8 N.m 71 lb in
Sink to Valve Body
Control Valve Upper Body
Assembly to Control Valve 301 12 M5x0.8x36 8 N.m 71 lb in
Lower Body Assembly
Control (with Body and Valve)
Valve Assembly to Case 22 6 M5x0.8x73 8 N.m 71 lb in
Assembly
Fluid Pan Assembly to Case
30 18 M6x1.0x20 9 N.m 80 lb in
Assembly
Fluid Pump Cover Assembly
231 13 M6 1.0x40 11 N.m 97 lb in
to Torque Converter Housing
Input and Output Speed Sensor
Assembly to Control Valve 302 2 M6x1.0x20 12 N.m 106 lb in
Upper Body Assembly

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Line Pressure Test Hole Plug

202 1 1/8-27 NPTF 11 N.m 97 lb in
to Torque Converter Housing
Manual Shaft Detent Assembly
23 1 M6x1.0x14.5 12 N.m 106 lb in
to Valve Body
Torque Converter Housing
3 9 M10x1.5x50 72 N.m 53 lb ft
Assembly to Case Assembly
Trans Oil Level Check Plug to
31 1 M12x1.75 25 N.m 18 lb ft
Fluid Pan Assembly
Transmission Oil Cooler Pipe
- - - 10 N.m 89 lb in
Clip to Oil Pan Nuts
Transmission Oil Cooler Pipe
- - - 12 N.m 106 lb in
Clip to Torque Tube Bolts
Transmission Oil Cooler Pipes
- - - 16 N.m 12 lb ft
to Transmission Bolt
*Reference number refers to the component callout number in Disassembled Views

TRANSMISSION GENERAL SPECIFICATIONS

Transmission General Specifications

Name 6L80
RPO Codes MYC
Production Location Ypsilanti, Michigan (USA)
Transmission Drive Rear Wheel Drive
1st Gear Ratio 4.027
2nd Gear Ratio 2.364
3rd Gear Ratio 1.532
4th Gear Ratio 1.152
5th Gear Ratio 0.852
6th Gear Ratio 0.667
Reverse 3.064
Torque Converter Size - Diameter of Torque
258/300 mm
Converter Turbine
Pressure Taps Line Pressure
Transmission Fluid Type Dexron VI
Transmission Type: 6 Six Forward Gears
Transmission Type: L Longitude Mount
Transmission Type: 80 Product Series
Position Quadrant P, R, N, D, S (some models)
Case Material Die Cast Aluminum
Transmission Net Weight 96.7 kg (213.2 lb)
Maximum Trailer Towing Capacity N/A

FLUID CAPACITY SPECIFICATIONS

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fluid Capacity Specifications

Specification
Application Metric English
Pan Removal - Approximate Capacity 6.2 liters 6.5 quarts
Overhaul - Approximate Capacity 9.5 liters 10 quarts
Complete Trans System Fluid Capacity 10.32 liters 10.91 quarts

RANGE REFERENCE

Range Reference Table

Drive
1st
1st 2nd 3rd 4th 5th 6th
Range Park Reverse Neutral Braking
1-2-3-4 Clutch - - - Applied Applied Applied Applied Applied - -
3-5 Reverse
- Applied - - - - Applied - Applied -
Clutch
4-5-6 Clutch - - - - - - - Applied Applied Applied
2-6 Clutch - - - - - Applied - - - Applied
Low and
Applied* Applied Applied* Applied - - - - - -
Reverse Clutch
Low Clutch
- - - Holding Holding - - - - -
Sprag
* = Applied with NO load

SHIFT SOLENOID VALVE STATE AND GEAR RATIO

Shift Solenoid Valve State and Gear Ratio

LOW
1-2-3-4 3-5 REV
2-6 CL PC REV 4-5-6
Shift SOL Shift SOL CL PC CL PC Gear
Gear SOL 4 CL PC
1 2 SOL 5 SOL 2 Ratio
N.L. SOL 3
N.L. N.H.
N.H.
Park ON ON OFF OFF OFF ON -
Reverse ON OFF OFF OFF ON ON 3.064
Neutral ON ON OFF OFF OFF ON -
1st Braking ON ON ON OFF OFF ON 4.027
1st OFF ON ON OFF OFF OFF 4.027
2nd OFF ON ON ON OFF OFF 2.364
3rd OFF ON ON OFF ON OFF 1.532
4th OFF ON ON OFF OFF ON 1.152
5th OFF ON OFF OFF ON ON 0.852
6th OFF ON OFF ON OFF ON 0.667

For shift solenoids 1 and 2, "ON" = Solenoid Energized (Pressurized) "OFF" = Solenoid De-energized

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

(No Pressure).
For pressure control solenoids, "ON" = Pressurized, "OFF" = No Pressure

SHIFT SPEED

Shift Speed
Shift @ TP km/h mph OSS (RPM)
1-2 @ 12.5 TP 18.5 11 377
2-1 @ 12.5 TP 11 7 224
2-3 @ 12.5 TP 35 22 714
3-2 @ 12.5 TP 22 14 449
3-4 @ 12.5 TP 52 32 1060
4-3 @ 12.5 TP 35.5 22 724
4-5 @ 12.5 TP 68 42 1387
5-4 @ 12.5 TP 53.5 33 1091
5-6 @ 12.5 TP 94 58 1917
6-5 @ 12.5 TP 73 45 1489
1-2 @ 25 TP 24.5 15 500
2-1 @ 25 TP 11 7 224
2-3 @ 25 TP 48.5 30 989
3-2 @ 25 TP 25 16 510
3-4 @ 25 TP 67.5 42 1377
4-3 @ 25 TP 37 23 755
4-5 @ 25 TP 90 56 1835
5-4 @ 25 TP 59 37 1203
5-6 @ 25 TP 129.5 80 2641
6-5 @ 25 TP 81 50 1652

IMPORTANT: Shift speed points are affected by many different vehicle and transmission
operating conditions. The table above represents shift speed points calibrated
at specific throttle angles during normal operating conditions and a
temperature range between 0 -130°C (32-266°F). These shift speed points are
also based on an axle ratio of 2.56, and assume a production-intent tire size.
The table below illustrates a number of different variables that influence these
shift speed points. Based on a given operating condition, these variables may
override the normal shift speed points. To assist in monitoring the different
variables, the respective scan tool data parameter is also listed.

Shift Speed
Scan Tool Parameter Shift Speed Variables
Calc. Throttle Position (TP) is one of the most important
Calc. Throttle Position inputs in the transmission shift pattern logic. A very low TP
angle will impact the shift pattern by causing upshifts. A very

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

high TP angle will impact the shift pattern by causing

downshifts.
Based on numerous inputs, the transmission control module
(TCM) selects the optimum gear. Once the TCM commands a
Commanded Gear
gear, the pressure control solenoids are activated to
hydraulically control engagement of the proper clutch.
When cruise control is activated, the shift pattern is altered to
Cruise
reduce excessive shifting.
When Driver Shift Control (DSC) is Active, shift speed points
are manually determined by the driver. However, in order to
Driver Shift Control
protect the engine, DSC will not be allowed if vehicle speed is
too high or too low for an upshift or downshift.
Shift speed points may be offset to enhance engine coolant
temperature (ECT) warm-up. Also, operating the vehicle at
ECT
higher engine speeds will reduce the time it takes to warm the
ECT and the TFT.
To protect against an over speed condition, engine speed is
Engine Speed monitored. If the engine speed becomes too high, an upshift
will occur.
Engine torque is used to predict vehicle operating conditions,
Engine Torque in order to determine the optimum gear and provide for a
smoother ride.
The internal mode switch (IMS) indicates the position of the
transmission manual valve. The operator controls this valve by
IMS
moving the gear range selector. Therefore, the possible gears
may be limited by this valve position.
The torque converter clutch (TCC) pressure control (PC)
TCC PC Sol. Duty Cycle
solenoid duty cycle indicates when the TCC has been engaged.
The TCC Slip Speed indicates the difference between engine
speed and transmission input speed. The TCC is locked when
TCC Slip Speed
slip speed is at or near zero, and may be controlling slip when
at lower slip speeds.
The transmission fluid pressure (TFP) switch is used to
TFP Switch 1, 3, 4 or 5 indicate if fluid pressure to a specific clutch has been applied
or released.
A lower TFT will extend shift speeds, a higher TFT, or hot
Trans. Fluid Temp. mode condition, will invoke shorter shift speeds in order to
establish a shift pattern required to cool the TFT.
If the TFT becomes too hot, a hot mode shift pattern is used.
Transmission Hot Mode The hot mode shift pattern will invoke lower shift speed points
to establish a shift pattern necessary to cool the TFT.
The transmission output speed sensor (OSS) is one of the most
important inputs into the transmission shift pattern logic. A
Transmission OSS very low transmission output speed will impact the shift
pattern by causing downshifts. A very high transmission
output speed will impact the shift pattern by causing upshifts.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

TRANSMISSION INTERNAL MODE SWITCH LOGIC

Transmission Internal Mode Switch Logic

Gear Selector Position Signal A Signal B Signal C Signal P
Park LOW HI HI LOW
Park/Reverse LOW LOW HI LOW
Reverse LOW LOW HI HI
Reverse/Neutral HI LOW HI HI
Neutral HI LOW HI LOW
Neutral/Drive 6 HI LOW LOW LOW
Drive 6 HI LOW LOW HI
Drive 6/Drive 4 LOW LOW LOW HI
Drive 4 LOW LOW LOW LOW
Drive 4/Drive 3 LOW HI LOW LOW
Drive 3 LOW HI LOW HI
Drive 3/Drive 2 HI HI LOW HI
Drive 2 HI HI LOW LOW
Open HI HI HI HI
Invalid HI HI HI LOW
Invalid LOW HI HI HI
HI = Ignition voltage
LOW = 0 volts

SCHEMATIC AND ROUTING DIAGRAMS

AUTOMATIC TRANSMISSION SCHEMATIC ICONS

Automatic Transmission Schematic Icons

Icon Icon Definition

NOTE:
The OBD II symbol is used on the circuit
diagrams in order to alert the technician that
the circuit is essential for proper OBD II
emission control circuit operation. Any circuit
which fails and causes the malfunction
indicator lamp (MIL) to turn ON, or causes
emissions-related component damage, is
identified as an OBD II circuit.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

AUTOMATIC TRANSMISSION CONTROLS SCHEMATICS

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 1: DLC, Ground, MIL, and Power

Courtesy of GENERAL MOTORS CORP.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 2: IMS, ISS, Solenoids, TFT, and VSS

Courtesy of GENERAL MOTORS CORP.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 3: Shift Lever

Courtesy of GENERAL MOTORS CORP.

COMPONENT LOCATOR
AUTOMATIC TRANSMISSION ELECTRONIC COMPONENT VIEWS

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 4: Electronic Components

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Control Solenoid (with Body and TCM) Valve Assembly
2 A/Trans Input and Output Speed Sensor Assembly
3 A/Trans Manual Shift Shaft Position Switch Assembly

DISASSEMBLED VIEWS

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 5: Case and Associated Parts

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Torque Converter Assembly
2 Torque Converter (with Fluid Pump) Housing Assembly
3 Bolt/Screw, M10 x 50 mm
4 Torque Converter Housing Access Hole Cover
5 A/Trans Fluid Pump Seal
6 Torque Converter Housing Locator Pin
7 A/Trans Case Assembly
8 Transmission Fluid Fill Tube Plug Assembly
9 A/Trans Connector Seal
10 A/Trans Connector (O-ring) Seal
11 A/Trans Electrical Connector Passage Sleeve
12 A/Trans Case Plug
13 Output Shaft Bushing

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

14 Output Shaft Seal Assembly

15 A/Trans Case Extension
16 Bolt/Screw, M10 x 40 mm
17 A/Trans Case Extension Stud
18 A/Trans Fluid Pump Seal Assembly
19 A/Trans Fluid Pump Seal Assembly
20 Center Support Fluid Passage Seal Assembly
21 Control (with Body and Valve) Valve Assembly
22 Bolt/Screw, M5 x 73 mm
23 Bolt/Screw, M6 x 14.5 mm
24 Manual Shaft Detent Assembly
25 A/Trans Fluid Filter Seal Assembly
26 A/Trans Fluid Filter Assembly
27 A/Trans Fluid Pan Gasket
28 A/Trans Fluid Pan Magnet
29 A/Trans Fluid Pan Assembly
30 Bolt/Screw, M6 x 20 mm
31 Trans Oil Level Check Plug

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 6: Clutch Assemblies and Associated Parts

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

51 1-2-3-4 and 3-5 Reverse Clutch Assembly
52 Input Carrier Assembly
53 Input Sun Gear
54 Input Sun Gear Thrust Bearing
55 Input Sun Gear Thrust Washer
56 4-5-6 (w/ Turbine Shaft) Clutch Assembly
57 Turbine Shaft Thrust Bearing Assembly
58 4-5-6 Clutch (w/ Output Carrier Shaft and Dampener) Hub Assembly
59 4-5-6 Clutch Hub Thrust Bearing Assembly
60 Output Carrier Inner Sun Gear Shaft (Front) Bushing
61 1-2-3-4 Clutch (w/ Output Carrier Inner Sun Gear Shaft) Hub Assembly
62 Output Carrier Inner Sun Gear Shaft Bushing
63 1-2-3-4 Clutch Hub Thrust Bearing Assembly

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

2-6 and 3-5 Reverse Clutch (w/ Output Carrier Outer Sun Gear Shaft) Hub
64
Assembly
65 2-6 and 3-5 Reverse Clutch Hub Thrust Bearing Assembly
66 Center Support Retaining Ring
67 Center (w/ 2-6 Low and Reverse Clutch) Support Assembly
68 Output Carrier Assembly
69 Output Carrier Thrust Bearing Assembly
70 Output Shaft Assembly
71 Output Shaft Thrust Bearing Assembly

Fig. 7: Torque Converter (w/Fluid Pump) Housing Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

200 Torque Converter Fluid Seal Retaining Ring
201 Torque Converter Fluid Seal Assembly
202 Line Pressure Test Hole Plug
203 Torque Converter Housing
204 A/Trans Vent Pipe (Model Dependent)
205 Trans Fluid Cooler Pipe Fitting Seal
206 Torque Converter Bushing
207 A/Trans Fluid Pump Vane Ring
208 A/Trans Fluid Pump Rotor Guide

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

209 A/Trans Fluid Pump Slide Fluid Seal Ring

210 A/Trans Fluid Pump Slide (O-ring) Seal
211 A/Trans Fluid Pump Slide Outer Spring
212 A/Trans Fluid Pump Slide
213 A/Trans Fluid Pump Slide Seal
214 A/Trans Fluid Pump Slide Seal Support
215 A/Trans Fluid Pump Slide Pivot Pin
216 A/Trans Fluid Pump Vane
217 A/Trans Fluid Pump Rotor
218 Turbine Shaft Front Bushing
219 A/Trans Fluid Pump Cover Assembly
220 Converter Feed Limit Valve
221 Converter Feed Limit Valve Spring
222 Valve Spring Retainer
223 Pressure Relief Ball Valve Spring Pin
224 Pressure Relief Ball Valve Spring
225 Pressure Relief Ball Valve
226 TCC Control Valve Spring
227 TCC Control Valve
228 Turbine Shaft Rear Bushing
229 1-2-3-4 and 3-5 Reverse Clutch Housing Thrust Washer
230 1-2-3-4 and 3-5 Reverse Clutch Fluid Seal Ring
231 Bolt/Screw, M6 x 40 mm
232 A/Trans Fluid Pump Locator Pin
233 Pressure Regulator Valve
234 Pressure Regulator Valve Outer Spring
235 Pressure Regulator Valve Inner Spring
236 Isolator Valve
237 Isolator Valve Sleeve

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 8: Control (with Body and Valve) Valve Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

301 Bolt, M5 x 36 mm
302 Bolt, M6 x 20 mm
303 A/Trans Input and Output Speed Sensor Assembly
304 Control Valve Upper Body Assembly
305 Control Valve Body Spacer (w/ Gasket) Plate Assembly
306 Control Valve Body Ball Check Valve
307 Control Valve Lower Body Assembly
308 A/Trans Manual Shift Shaft Position Switch Assembly
309 Bolt, M5 x 45 mm
310 Bolt, M5 x 55 mm
311 Filter Plate Assembly
312 Bolt, M5 x 53 mm
314 Control Solenoid (w/ Body and TCM) Valve Assembly

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

315 A/Trans Manual Shaft Position Switch Wiring Harness Clip

316 A/Trans Input and Output Speed Sensor Wiring Harness Clip

Fig. 9: Upper Control Valve Body Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

313 Control Valve Body Locator Pin
321 Control Valve Upper Body
322 Control Valve Body Locator Pin
323 Retainer
324 Actuator Feed Limit Valve Spring
325 Actuator Feed Limit Valve
326 Clutch Regulator Valve Spring
327 CBR1/4-5-6 Clutch Regulator Valve
328 Clutch Regulator Valve Bore Plug
329 Clutch Boost Valve
330 Clutch Boost Valve Spring
334 2-6 Clutch Regulator Valve
335 2-6 Clutch Regulator Valve Gain Valve
336 3-5 Reverse Clutch Regulator Valve
337 1-2-3-4 Clutch Regulator Valve
338 Shuttle Valve

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 10: Lower Control Valve Body Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

323 Retainer
328 Clutch Regulator Valve Bore Plug
338 Shuttle Valve
351 Control Valve Lower Body
352 Clutch Select Solenoid Valve
353 Clutch Select Solenoid Valve Spring
354 Manual Valve
355 TCC Regulator Apply Valve
356 Clutch Piston Dam Feed Regulator Valve
357 Clutch Piston Dam Feed Regulator Valve Spring

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 11: 1-2-3-4 and 3-5 Reverse Clutch Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

400 3-5 Reverse Clutch Backing Plate Retaining Ring
401 3-5 Reverse Clutch Backing Plate
402 3-5 Reverse Clutch Plate Assembly
403 3-5 Reverse Clutch Plate
404 3-5 Reverse Clutch (Waved) Plate
405 3-5 Reverse Clutch Apply Ring
407 1-2-3-4 Clutch Backing Plate
408 1-2-3-4 Clutch Plate Assembly
409 1-2-3-4 Clutch Plate
410 1-2-3-4 Clutch (Waved) Plate
411 1-2-3-4 Clutch Piston Dam Retaining Ring
412 1-2-3-4 Clutch Piston Dam Assembly
413 1-2-3-4 Clutch Spring

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

414 1-2-3-4 Clutch Piston

415 1-2-3-4 Clutch Piston Housing Retaining Ring
416 1-2-3-4 Clutch Piston Seal
417 1-2-3-4 Clutch Piston Housing
418 3-5 Reverse Clutch Piston Dam (O-ring) Seal
419 3-5 Reverse Clutch Piston Inner Seal
420 3-5 Reverse Clutch Spring
421 3-5 Reverse Clutch Piston
422 3-5 Reverse Clutch Piston Outer Seal
423 1-2-3-4 Clutch Piston Inner Seal
424 1-2-3-4 Clutch Piston Housing Seal
425 1-2-3-4 Clutch Piston Housing Seal
426 1-2-3-4 and 3-5 Reverse Clutch Housing Rear Bushing
427 1-2-3-4 and 3-5 Reverse Clutch Housing Assembly
428 1-2-3-4 and 3-5 Reverse Clutch Bearing Assembly
429 1-2-3-4 Clutch Backing Plate Retaining Ring

Fig. 12: 4-5-6 (w/Turbine Shaft) Clutch Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

431 4-5-6 Clutch Backing Plate Retaining Ring
432 4-5-6 Clutch Backing Plate

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

433 4-5-6 Clutch Plate Assembly

434 4-5-6 Clutch Plate
435 4-5-6 Clutch (Waved) Plate
436 4-5-6 Clutch Piston Dam Retaining Ring
437 4-5-6 Clutch Piston Dam Assembly
438 4-5-6 Clutch Spring
439 4-5-6 Clutch Piston Assembly
440 Output Carrier Shaft Housing Bushing
441 4-5-6 (w/Turbine Shaft) Housing Assembly
442 Turbine Shaft Fluid Seal Ring
443 Turbine Shaft (O-ring) Seal

Fig. 13: 2-6 Clutch Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

450 2-6 Clutch Backing Plate Retaining Ring
451 2-6 Clutch Backing Plate
452 2-6 Clutch Plate Assembly
453 2-6 Clutch Plate
454 2-6 Clutch (Waved) Plate
455 2-6 Clutch Spring Retaining Ring
456 2-6 Clutch Spring

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

457 2-6 Clutch Piston Assembly

458 Output Carrier Outer Sun Gear Shaft (Front) Bushing
459 Center Support Assembly
460 Output Carrier Outer Sun Gear Shaft Rear Bushing

Fig. 14: Low and Reverse Clutch Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

459 Center Support Assembly
461 Low and Reverse Clutch Backing Plate Retaining Ring
462 Low and Reverse Clutch Backing Plate
463 Low and Reverse Clutch Plate Assembly
464 Low and Reverse Clutch Plate
465 Low and Reverse Clutch (Waved) Plate
466 Low and Reverse Clutch Spring Retaining Ring
467 Low Clutch Sprag Assembly

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

468 Low Clutch Sprag Seal

469 Low and Reverse Clutch Spring
470 Low and Reverse Clutch Piston Assembly

Fig. 15: 4-5-6 Clutch Hub Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

475 4-5-6 Clutch (w/ Output Carrier Shaft) Hub Assembly
476 4-5-6 Clutch Dampener
477 4-5-6 Clutch Dampener Apply Plate
478 4-5-6 Clutch Dampener Retaining Ring

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 16: Output Carrier Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

485 Center Support Roller Bearing Assembly
486 Output Carrier Front Sun Gear Thrust Bearing Assembly
487 Output Carrier Front Sun Gear
488 Output Carrier Front Sun Gear Rear Thrust Bearing Assembly
489 Output Carrier Rear Sun Gear
490 Output Carrier
491 Output Carrier Rear Sun Gear Thrust Bearing Assembly - Captured

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 17: Output Shaft Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

494 Output Carrier Internal Gear Retaining Ring
495 Output Carrier Internal Front Gear
496 Output Carrier Internal Gear Spacer
497 Output Carrier Internal Rear Gear
498 Output Carrier Bushing
499 Output Shaft Assembly

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 18: Park System Components

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

12 A/Trans Case Plug
500 Park Pawl Shaft
501 Park Pawl Spring
502 Park Pawl
503 Park Pawl Actuator Assembly
504 Manual Shaft Detent Lever Hub Pin
505 Manual Shaft Detent Lever Assembly
506 Manual Shift Shaft Pin
507 Manual Shift Shaft Seal
508 Manual Shift Shaft
509 Park Pawl Actuator Guide
510 Park Pawl Actuator Guide (O-ring) Seal
511 Park Pawl Actuator Guide Pin

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

COMPONENT LOCATION

Fig. 19: 6L80E Component Locations

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Torque Converter Assembly
2 Torque Converter (with Fluid Pump) Housing Assembly
21 Control (with Body and Valve) Valve Assembly
51 1-2-3-4 and 3-5 Reverse Clutch Assembly
52 Input Carrier Assembly
53 Input Sun Gear
56 4-5-6 (w/Turbine Shaft) Clutch Assembly
58 4-5-6 Clutch (w/Output Carrier Shaft and Dampener) Hub Assembly
61 1-2-3-4 Clutch (w/Output Carrier Inner Sun Gear Shaft) Hub Assembly
2-6 and 3-5 Reverse Clutch (w/Output Carrier Outer Sun Gear Shaft) Hub
64
Assembly
67 Center (w/2-6 Low and Reverse Clutch) Support Assembly
68 Output Carrier Assembly
70 Output Shaft Assembly
303 A/Trans Input and Output Speed Sensor Assembly
402 3-5 Reverse Clutch Plate Assembly
408 1-2-3-4 Clutch Plate Assembly
452 2-6 Clutch Plate Assembly

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

463 Low and Reverse Clutch Plate Assembly

467 Low Clutch Sprag Assembly
487 Output Carrier Front Sun Gear
489 Output Carrier Rear Sun Gear
495 Output Carrier Internal Front Gear
497 Output Carrier Internal Rear Gear
502 Park Pawl
503 Park Pawl Actuator Assembly
505 Manual Shaft Detent Lever Assembly
508 Manual Shift Shaft

AUTOMATIC TRANSMISSION INLINE 16-WAY CONNECTOR END VIEW

16-Way Transmission Pass-Through

Fig. 20: 16-Way Transmission Pass-Through Connector

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Inline 16-Way Connector End View

Connector Part Information

lOEM: 15491328
l Service: 15131300

l Description: 16-Way F 1.5 Pin Housing (BK)

Terminal Part Information

l Terminal/Tray: see terminal repair kit

l Core/Insulation Crimp: see terminal repair kit
l Release Tool/Test Probe: see terminal repair kit

16-Way Transmission Pass-Through

Pin Wire Color Circuit No. Function
1-2 - - Not Used
3 OG/BK 1786 Park/Neutral Signal
4 RD/WH 2440 Battery Positive Voltage
5 BK/WH 451 Ground
6 WH 17 Brake Pedal Apply Signal
7-8 - - Not Used
9 YE 43 Accessory Voltage Power
10 TN/BK 2500 CAN Hi
11 TN 2501 CAN Lo
12 PK 1339 Run/Crank Voltage
13 TN 2501 CAN Lo 2
14 TN/BK 2500 CAN Hi 2
15-16 - - Not Used

AUTOMATIC TRANSMISSION INTERNAL CONNECTOR END VIEWS

Input and Output Speed Sensor (ISS/OSS)

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 21: Input and Output Speed Sensor (ISS/OSS) Connector View
Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Internal Connector End Views

Connector Part Information

lOEM: 12064758
l Service: non-serviceable (12117320)

l Description: 3-Way F Metri-Pack 150 Series (NA)

Terminal Part Information

l Terminal/Tray: non-serviceable
l Core/Insulation Crimp: non-serviceable
l Release Tool/Test Probe: non-serviceable

Input and Output Speed Sensor (ISS/OSS)

Pin Wire Color Circuit No. Function
A GN - Input Speed Sensor (ISS) Signal
B RD - ISS/OSS Supply Voltage
C BK - Output Speed Sensor (OSS) Signal

Internal Mode Switch (IMS)

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 22: Internal Mode Switch Connector

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Internal Connector End Views

Connector Part Information

l OEM: 15336500
l Service: non-serviceable (89046635)

l Description: 6-Way F Metri-Pack 150.2 Series (GN)

Terminal Part Information

l Terminal/Tray: non-serviceable
l Core/Insulation Crimp: non-serviceable
l Release Tool/Test Probe: non-serviceable

Internal Mode Switch (IMS)

Pin Wire Color Circuit No. Function
A GY - Ground
B BK - Transmission Range Switch Signal P
C YE - Transmission Range Switch Signal C
D RD - Transmission Range Switch Signal B
E GN - Transmission Range Switch Signal A
F WH - Park/Neutral Switch Signal

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

AUTOMATIC TRANSMISSION RELATED CONNECTOR END VIEWS

TU/TD Assembly Harness J1

Fig. 23: TU/TD Assembly Harness J1 Connector

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Related Connector End Views

Connector Part Information

l OEM: 12092163
l Service: 12092163

l Description: 4-Way F W/"S" Clip 2973342 Type 105

Terminal Part Information

l Terminal/Tray: Packard 12059894

l Core/Insulation Crimp: See Terminal Repair Kit
l Release Tool/Test Probe: See Terminal Repair Kit

TU/TD Assembly Harness J1

Pin Wire Color Circuit No. Function

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

A TN 28 Horn Trace (B+)

B BK 1450 Horn Plate (Ground)
C PK 1039 TU/TD Power
D PU 5526 TU/TD Feedback

TU/TD Assembly Harness J4

Fig. 24: TU/TD Assembly Harness J4 Connector

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Related Connector End Views

Connector Part Information

l OEM: 31072-1010 / Delphi 15422578

l Service: Non-Serviceable

l Description: 5-Way F Molex (BK)

Terminal Part Information

l Terminal/Tray: See Terminal Repair Kit

l Core/Insulation Crimp: See Terminal Repair Kit
l Release Tool/Test Probe: See Terminal Repair Kit

TU/TD Assembly Harness J4

Pin Wire Color Circuit No. Function

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

1 PU 2663 TU Feedback
2 PK 1039 TU/TD Feedback
3 PK 1039 TU/TD Power
4 TN 2664 TD Feedback
5 PU 5526 TU/TD Feedback

TU/TD Assembly Harness J5

Fig. 25: TU/TD Assembly Harness J5 Connector

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Related Connector End Views

Connector Part Information

l OEM: 31067-1012
l Service: Non-Serviceable

l Description: 3-Way F Molex (BN)

Terminal Part Information

l Terminal/Tray: See Terminal Repair Kit

l Core/Insulation Crimp: See Terminal Repair Kit
l Release Tool/Test Probe: See Terminal Repair Kit

TU/TD Assembly Harness J5

Pin Wire Color Circuit No. Function
1 TN 2664 TD Feedback

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

2 PK 1039 TU/TD Power

3 PU 2663 TU/TD Feedback

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

DTC Description
DTC P0218 Transmission Fluid Overtemperature
DTC P0562 or P0563 System Voltage High/Low
DTC P0601, P0602, P0603, Transmission Control Module (TCM)
P0604, or P1621
DTC P0634 Transmission Control Module (TCM) Overtemperature
DTC P0667, P0668, or P0669 Transmission Control Module (TCM) Temperature Sensor
DTC P0711, P0712, or P0713 Transmission Fluid Temperature (TFT) Sensor
DTC P0716 or P0717 Input Speed Sensor
DTC P0722 or P0723 Output Speed Sensor (OSS)
DTC P0736 Incorrect Reverse Ratio
DTC P0741 or P0742 Torque Converter Clutch (TCC) - Stuck Off/On
DTC P0751 Shift Solenoid (SS) 1 Valve Performance - Stuck Off
DTC P0752 Shift Solenoid (SS) 1 Valve Performance - Stuck On
DTC P0756 Shift Solenoid (SS) 2 Valve Performance - Stuck Off
DTC P0776 or P0777 Clutch Pressure Control (PC) Solenoid 2 - Stuck Off/On
DTC P0796 or P0797 Clutch Pressure Control (PC) Solenoid 3 - Stuck Off/On
DTC P0815, P0816, P0826, or Up and Down Shift Switch
P1876
DTC P0842 or P0843 Transmission Fluid Pressure (TFP) Switch 1 Circuit Low/High Voltage
DTC P0851 or P0852 Park/Neutral Position (PNP) Switch Circuit Low/High Voltage
DTC P0872 or P0873 Transmission Fluid Pressure (TFP) Switch 3 Circuit Low/High Voltage
DTC P0877 or P0878 Transmission Fluid Pressure (TFP) Switch 4 Circuit Low/High Voltage
DTC P0961, P0962 or P0963 Line Pressure Control (PC) Solenoid
DTC P0965, P0966 or P0967 Clutch Pressure Control (PC) Solenoid 2
DTC P0969, P0970 or P0971 Clutch Pressure Control (PC) Solenoid 3
DTC P0973 or P0974 Shift Solenoid (SS) 1 Control Circuit Low/High Voltage
DTC P0976 or P0977 Shift Solenoid (SS) 2 Control Circuit Low/High Voltage
DTC P0989 or P0990 Transmission Fluid Pressure (TFP) Switch 5 Circuit Low/High Voltage
DTC P1684, P1685 or P1686 Transmission Control Module (TCM) Power Up Temperature Sensor
DTC P1751 Shift Valve 1 Performance
DTC P1825 or P1915 Internal Mode Switch
DTC P1831 or P1832 Pressure Control (PC)/Shift Lock Solenoid Control Circuit Low/High
Voltage

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

DTC P2534 Ignition 1 Switch Circuit Low Voltage

DTC P2714 or P2715 Clutch Pressure Control (PC) Solenoid 4 - Stuck Off/On
DTC P2719, P2720 or P2721 Clutch Pressure Control (PC) Solenoid 4
DTC P2723 or P2724 Clutch Pressure Control (PC) Solenoid 5 - Stuck Off/On
DTC P2728, P2729 or P2730 Clutch Pressure Control (PC) Solenoid 5
DTC P2762, P2763, or P2764 Torque Converter Clutch (TCC) Pressure Control Solenoid

DIAGNOSTIC STARTING POINT - AUTOMATIC TRANSMISSION

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check -
Vehicle will provide the following information:

l The identification of the control module or modules which command the system.
l The ability of the control module or modules to communicate through the serial data circuit.
l The identification of any stored diagnostic trouble codes (DTCs) and the status of the codes.

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the
system and where the procedure is located.

SCAN TOOL OUTPUT CONTROLS

Scan Tool Output Controls

Scan Tool Output Additional Menu
Control Selection(s) Description
l The transmission control module (TCM) commands
the torque converter clutch pressure control (TCC PC)
solenoid pressure in order to apply and release the
TCC.
l When the ignition is ON, and the engine is OFF, there
are no limits to this control. The solenoid remains ON
until commanded OFF and vice versa.
l When the engine is running, the following control
limits apply:
¡ If the transmission range is Park, and the
TCC PC Solenoid -
transmission is in hot mode, the TCC PC
solenoid may not be commanded OFF. If the
solenoid is requested OFF, the message "TCC
OFF command disabled in Hot Mode" appears
on the scan tool display.
¡ The TCC PC solenoid may not be commanded
OFF for more than a calibrated amount of time.
If the solenoid is commanded OFF, for a certain
amount of time, the message "TCC OFF time
has been exceeded" appears on the scan tool

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display.
l The TCM commands Shift Solenoid 1 and Shift
Solenoid 2 ON and OFF.
l When the ignition is ON, and the engine is OFF, there
are no limits to this control. The solenoid remains ON
until commanded OFF, and vice versa. When the
Shift Solenoid 1 output control is exited, the solenoid state is
determined by the TCM.
l When the engine is running, the following control
limits apply:
¡ The transmission range must be in Park or

- Neutral. If the transmission range is not Park or

Neutral, the message "Engine running and
transmission range is not Park/Neutral" appears
on the scan tool display.
¡ The solenoid remains ON until commanded
OFF, and vice versa. When the output control is
Shift Solenoid 2 exited, the solenoid state is determined by the
TCM.
¡ Transmission range DTCs must not be active. If
a transmission range DTC is active, the message
"Engine running with transmission DTC
present" appears on the scan tool display.
l The scan tool is used to request pressure in increments
of 207 kPa (30 psi) from 0-1862 kPa (0-270 psi). The
TCM will then command the solenoid to achieve the
requested pressure.
l When the ignition is ON, and the engine is OFF, the
pressure request may be controlled within calibrated
limits. There are no limits to the output control when
the engine is OFF.
l When the engine is running, the following control
limits apply:
Line PC Solenoid - ¡ When the transmission range is Park or Neutral,
the pressure request may be controlled within
calibrated limits. The engine speed must be less
than 1,500 RPM. If the engine speed is greater
than 1,500 RPM, the message "TR in
park/neutral and engine speed over 1,500 RPM"
appears on the scan tool display.
¡ When the transmission range is not Park or
Neutral, the requested pressure can only be
controlled equal to or greater than the pressure
determined by the TCM. The TCM does not

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

allow a pressure to be selected that may cause

damage to the transmission. If the requested
pressure is less than allowed by the TCM, the
message "Requested pressure for the Line PC
Solenoid is too low" appears on the scan tool
display.
¡ Transmission range DTCs must not be active. If
a transmission range DTC is active, the message
"Engine running with transmission DTC
present" appears on the scan tool display.
l The TCM commands the pressure control solenoids in
order to apply and release the clutches.
PC Solenoid 2 - l When the ignition is ON, and the engine is OFF, there
are no limits to this control. The solenoid remains ON
until commanded OFF, and vice versa. When the
output control is exited, the solenoid state is
determined by the TCM.
l When the engine is running, the following control
PC Solenoid 3 -
limits apply
¡ The transmission range must be in Park or
Neutral. If the transmission range is not Park or
Neutral, the message "Engine running and
transmission range is not Park/Neutral" appears
PC Solenoid 4 - on the scan tool display.
¡ The solenoid remains ON until commanded
OFF, and vice versa. When the output control is
exited, the solenoid state is determined by the
TCM.
¡ Transmission range DTCs must not be active. If
PC Solenoid 5 - a transmission range DTC is active, the message
"Engine running with transmission DTC
present" appears on the scan tool display.
l The TCM commands the driver for the solenoid
voltage supply ON and OFF.
l When the ignition is ON, and the engine is OFF, there
High Side Driver 2 -
are no limits to this control.
l High side drivers may not be commanded ON and
OFF with the scan tool if the engine is running.
Fast Learn Adapts - Control limits are not defined at this time
Service Clean
- Control limits are not defined at this time
Procedure

SCAN TOOL DATA LIST

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Use the Scan Tool Data List under the following conditions:

l The Diagnostic System Check - Vehicle is complete.

l The on-board diagnostics are functioning properly.
l No diagnostic trouble codes (DTCs) are present.

The values below represent a typical display recorded from a properly functioning system.

IMPORTANT: Do not use a scan tool that displays faulty data. Report the condition to the
scan tool manufacturer. The use of a faulty scan tool can result in
misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other
parameters, the values are not recommended by General Motors for use in diagnosis.

Scan tool values below were recorded under the following conditions:

l Engine at idle
l Upper radiator hose hot
l Closed throttle
l Transmission in PARK
l Closed Loop Operation
l Accessories OFF
l Brake pedal not applied

Scan Tool Data List

Scan Tool Parameter Data List* Units Displayed Typical Data Value
1-2 Shift Time F0, F2 Seconds Varies
2-3 Shift Time F0, F2 Seconds Varies
3-4 Shift Time F0, F2 Seconds Varies
4-5 Shift Time F0, F2 Seconds Varies
5-6 Shift Time F0, F2 Seconds Varies
Calc. Throttle Position F0, F1, F2 % Varies
1, 2, 3, 4 or 1, 2, 3, 4,
Commanded Gear F0, F1, F2, F3 5 or Park/Neutral, 1, 2, 3, 4, 5, or 6
Reverse, 1, 2, 3, 4, 5
Driver Shift Control F0 Active/Inactive Inactive
Upshift/ Downshift/
Driver Shift Request F0 None
None/ Invalid
ECT F0, F1, F2 °C (°F) Varies
Engine Speed F0, F1, F2 RPM Varies
Engine Torque F0, F1, F2 N.m (lb ft) Varies
Gear Ratio F0, F1, F2, F3 Ratio Varies

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 2006 Cadillac XLR
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High Side Driver 2 F1, F2, F3 Enabled/Disabled Enabled

OK, Open/Short to
High Side Driver 2 CKT Status F1, F2, F3 Volts, Short to GND, OK
Indeterminate
Ignition Voltage F0, F2, F3 Volts 12-14
Park-Drive 1, Open,
IMS F0, F2 Park
Invalid
IMS A/B/C/P F0, F2 HI/LOW Varies
ISS/OSS Supply Voltage F0, F1, F2 OK, Out of Range OK
Last Shift Time F0, F2 Seconds Varies
OK, Open/Short to
Line PC Sol. CKT Status F3 GND, Short to Volts, OK
Indeterminate
Line PC Sol. Pressure Command F0, F3 kPa (psi) Varies
OK, Open/Short to
PC Sol. 2 CKT Status F3 GND, Short to Volts, OK
Indeterminate
PC Sol. 2 Pressure Comm F0, F3 kPa (psi) Varies
OK, Open/Short to
PC Sol. 3 CKT Status F3 GND, Short to Volts, OK
Indeterminate
PC Sol. 3 Pressure Comm F0, F3 kPa (psi) Varies
OK, Open/Short to
PC Sol. 4 CKT Status F3 GND, Short to Volts, OK
Indeterminate
PC Sol. 4 Pressure Comm F0, F3 kPa (psi) Varies
OK, Open/Short to
PC Sol. 5 CKT Status F3 GND, Short to Volts, OK
Indeterminate
PC Sol. 5 Pressure Comm F0, F3 kPa (psi) Varies
OK, Open/Short to
Shift Sol. 1 CKT Status F3 GND, Short to Volts, OK
Indeterminate
Shift Solenoid 1 F3 On/Off On
OK, Open/Short to
Shift Sol. 2 CKT Status F3 GND, Short to Volts, OK
Indeterminate
Shift Solenoid 2 F3 On/Off On
TCC Brake Switch F0, F1, F2 Open/Closed Open
TCC PC Sol. Pressure Comm F0, F1, F3 kPa (psi) Varies
TCC Slip Speed F0, F1, F2 RPM Varies
TCM Temperature F0, F1, F2 °C (°F) Varies
TFP Switch 1 F0 HI/LOW HI/LOW
TFP Switch 3 F0 HI/LOW HI/LOW

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

TFP Switch 4 F0 HI/LOW HI/LOW

TFP Switch 5 F0 HI/LOW HI/LOW
Trans. Fluid Temp. F0, F1, F2 °C (°F) Varies
Transmission ISS F0, F1, F2 RPM Varies
Transmission OSS F0, F1, F2 RPM Varies
*Data List Legend

l F0: Transmission Data

l F1: TCC Data
l F2: Shift Data
l F3: Solenoid Data

SCAN TOOL DATA DEFINITIONS

1-2 Shift Time

This parameter displays the actual time of the last adaptable 1-2 shift. The shift time is based on the gear
ratio change after the commanded 1-2 shift.

2-3 Shift Time

This parameter displays the actual time of the last adaptable 2-3 shift. The shift time is based on the gear
ratio change after the commanded 2-3 shift.

3-4 Shift Time

This parameter displays the actual time of the last adaptable 3-4 shift. The shift time is based on the gear
ratio change after the commanded 3-4 shift.

4-5 Shift Time

This parameter displays the actual time of the last adaptable 4-5 shift. The actual shift time is obtained by
measuring the time required for the input shaft to decelerate from the previous ratio to the current ratio.

5-6 Shift Time

This parameter displays the actual time of the last 5-6 shift. The shift time is base on the gear ratio change
after the commanded 5-6 shift.

Calc. Throttle Position

This parameter displays a calculated value, which is determined by the accelerator pedal position and the
actual throttle position, used to optimize transmission controls. The parameter represents the driver's
intended request for torque or acceleration. The range is 0-100%, where 0% represents an idle or coast
request and 100% represents a request for wide open throttle (WOT).

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 2006 Cadillac XLR
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Commanded Gear

This parameter displays the current commanded state of the shift solenoid valves. The scan tool displays
1, 2, 3, 4 or 5.

Driver Shift Control

This parameter displays Active or Inactive. The scan tool displays Active when the gear selector is in the
sport (S) position, which enables TAP shift. The scan tool displays Inactive when the gear selector is not
in the S position, TAP shift disabled.

Driver Shift Request

This parameter displays the current request from the TAP Shift System. This parameter will display
upshift, downshift or invalid, depending on the amount of voltage measured at the remote shift selector
input, and will also display none when there is no request.

ECT

This parameter displays the input signal from the engine coolant temperature (ECT) sensor. ECT is high
at 151°C (304°F) when the signal voltage is low, 0 volt. ECT is low at -40°C (-40°F) when the signal
voltage is high, 5 volt.

Engine Speed

This parameter displays the rotational speed of the engine expressed as revolutions per minute.

Engine Torque

This parameter displays a calculated value based on engine load, throttle position, mass air flow, and
other engine inputs. This parameter is accurate to within 20 N.m (15 ft lb) of actual measured engine
torque.

Gear Ratio

This parameter displays the actual transmission gear ratio. The scan tool displays the gear ratio calculated
from the automatic transmission input shaft speed sensor (AT ISS) and the automatic transmission output
shaft speed sensor (AT OSS) inputs.

High Side Driver 2

This parameter displays the High Side Driver 2 status on the scan tool. When the High Side Driver 2 is
commanded OFF this displays Disabled, when the High Side Driver 2 is commanded ON this displays
Enabled.

High Side Driver 2 CKT Status

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

This parameter displays the High Side Driver 2 circuit status on the scan tool. If the voltage is low when
the solenoid is commanded OFF, the scan tool will display Open/Short to GND. If the voltage is high
when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is
present the scan tool will display OK, or Indeterminate.

Ignition Voltage

This parameter displays the system voltage measured at the ignition feed.

IMS

This parameter displays PARK, PARK/REVERSE, REVERSE, REVERSE/NEUTRAL, NEUTRAL,

NEUTRAL/DRIVE 4, DRIVE 4, DRIVE 4/DRIVE 3, DRIVE 3, DRIVE 3/DRIVE 2, DRIVE 2, DRIVE
2/DRIVE 1, DRIVE 1 or INVALID. The IMS Range display represents a decoded status of the four
inputs from the IMS. The combination of IMS inputs are used to determine which position the manual
valve is in at any time.

IMS A/B/C/P

This parameter displays the status of the four A/B/C/P inputs from the automatic transmission internal
mode switch. I indicates an ignition voltage signal. LOW indicates a 0 voltage signal. The scan tool will
display HI/LOW, HI/LOW, HI/LOW, HI/LOW.

ISS/OSS Supply Voltage

This parameter displays OK, Out of Range.

Last Shift Time

This parameter displays the actual time of the last upshift. This value is only accurate if the shift was
adaptable.

Line PC Sol. CKT Status

This parameter displays whether an open, short to voltage or ground exists in the line pressure control
(PC) solenoid valve feedback signal circuit. The scan tool displays OK, Open/Short to Volts, Short to
GND, or Indeterminate.

Line PC Sol. Pressure Command

This parameter displays results in kPa (psi).

PC Sol. 2 CKT Status

This parameter displays OK, Open/Short to GND, Short to Volts, or Indeterminate.

PC Sol. 2 Pressure Cmd.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

This parameter displays kPa (psi).

PC Sol. 3 CKT Status

This parameter displays OK, Open/Short to GND, Short to Volts, or Indeterminate.

PC Sol. 3 Pressure Comm.

This parameter displays kPa (psi).

PC Sol. 4 CKT Status

This parameter displays OK, Open/Short to GND, Short to Volts, or Indeterminate.

PC Sol. 4 Pressure Comm.

This parameter displays kPa (psi).

PC Sol. 5 CKT Status

This parameter displays OK, Open/Short to GND, Short to Volts, or Indeterminate.

PC Sol. 5 Pressure Comm.

This parameter displays kPa (psi).

Shift Sol. 1 CKT Status

This parameter displays OK, Open/Short to GND, Short to Volts, or Indeterminate.

Shift Solenoid 1

This parameter displays the commanded state of the reverse, 1st shift solenoid valve (S1). The scan tool
displays On/Off.

Shift Sol. 2 CKT Status

This parameter displays OK, Open/Short to GND, Short to Volts, or Indeterminate.

Shift Solenoid 2

This parameter displays the commanded state of the 2-3, 3-4 shift solenoid valve (S2). The scan tool
displays On/Off.

TCC Brake Switch

This parameter displays the status of the TCC brake switch circuit input. OPEN indicates a zero voltage

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

input, brake pedal applied. CLOSED indicates a voltage input, brake pedal released. The scan tool
displays OPEN or CLOSED.

TCC PC Sol. CKT Status

This parameter displays whether an open or short to voltage or ground exists in the torque converter
clutch (TCC) pressure control (PC) solenoid valve feedback signal circuit. The scan tool displays OK,
Open/Short to Volts, Short to GND, or Indeterminate.

TCC PC Sol. Duty Cycle

This parameter displays the commanded On time of the torque converter clutch (TCC) solenoid valve.
The scan tool displays On time in percentage. A reading of 100 percent represents an energized,
commanded On state. A reading of 0 percent represents a non-energized commanded OFF state.

TCC PC Sol. Pressure Comm.

This parameter displays results in kPa (psi).

TCC Slip Speed

This parameter displays the difference between transmission input speed and engine speed. A negative
value indicates the engine speed is less than the input speed, deceleration. A positive value indicates the
engine speed is greater than the input speed, acceleration. A value of zero indicates the engine speed is
equal to the input speed, TCC applied.

TCM Temperature

This parameter displays results in °C (°F).

TFP Switch 1

This parameter displays the state of the first clutch oil pressure switch. The scan tool displays HI/LOW.

TFP Switch 3

This parameter displays the state of the 3rd clutch oil pressure switch. The scan tool displays HI/LOW.

TFP Switch 4

This parameter displays the state of the 4th clutch oil pressure switch. The scan tool displays HI/LOW.

TFP Switch 5

This parameter displays the state of the fifth clutch oil pressure switch. The scan tool displays HI/LOW.

Trans. Fluid Temp.

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This parameter displays the input signal of the transmission fluid temperature sensor. Transmission fluid
temperature is high, 151°C (304°F), when signal voltage is low, 0 volt. Transmission fluid temperature is
low, -40°C (-40°F), when signal voltage is high, 5 volt.

Transmission ISS

This parameter displays the rotational speed of the transmission input shaft. The scan tool displays input
shaft speed as revolutions per minute (RPM).

Transmission OSS

This parameter displays the rotational speed of the transmission output shaft. The scan tool displays
output shaft speed as revolutions per minute (RPM).

DIAGNOSTIC TROUBLE CODE (DTC) TYPE DEFINITIONS

Emissions Related DTCs

Action Taken When the DTC Sets - Type A

The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

Action Taken When the DTC Sets - Type B

The control module illuminates the MIL on the second consecutive ignition cycle that the diagnostic runs and
fails.

Conditions for Clearing the MIL/DTC - Type A or Type B

l The control module turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and
does not fail.
l A current DTC Last Test Failed clears when the diagnostic runs and passes.
l Use a scan tool in order to clear the MIL and the DTC.

Non-Emissions Related DTCs

Action Taken When the DTC Sets - Type C

l The control module stores the DTC information into memory when the diagnostic runs and fails.
l The MIL will not illuminate.
l The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC - Type C

l A last test failed, or current DTC, clears when the diagnostic runs and passes.
l Use a scan tool in order to clear the DTC.

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Conditions for Clearing the DTC - Type X

This DTC is available in the PCM software, but has been disabled, or turned OFF. In this case, the diagnostic
does not run, no DTCs are stored, and the MIL does not illuminate. Type X DTCs are used primarily for export
vehicles that do not require MIL illumination or DTC storing.

DIAGNOSTIC TROUBLE CODE (DTC) LIST/TYPE

Diagnostic Trouble Code (DTC) List/Type

DTC DTC Type
DTC P0218 C
DTC P0562 or P0563 C
DTC P0572 or P0573 C
DTC P0601, P0602, P0603, P0604, or P062F A
DTC P0634 A
DTC P0667, P0668, or P0669 C
DTC P0711, P0712, or P0713 C
DTC P0716 or P0717 A
DTC P0722 or P0723 A
DTC P0741 or P0742 B, A
DTC P0751 C
DTC P0752 A
DTC P0756 A
DTC P0776 or P0777 A
DTC P0796 or P0797 A
DTC P0815, P0816, P0826, or P1876 C
DTC P0842 or P0843 C
DTC P0872 or P0873 C
DTC P0877 or P0878 C
DTC P0961, P0962, or P0963 C, A, C
DTC P0965, P0966, or P0967 C, A, A
DTC P0969, P0970, or P0971 C, A, A
DTC P0973 or P0974 A, B
DTC P0976 or P0977 B, A
DTC P0989 or P0990 C
DTC P1684, P1685, or P1686 C
DTC P1751 B
DTC P1825 or P1915 A
DTC P1831 or P1832 A, C
DTC P2534 A
DTC P2714 or P2715 A
DTC P2719, P2720, or P2721 C, A, A

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DTC P2723 or P2724 A

DTC P2728, P2729, or P2730 C, A, C
DTC P2762, P2763, or P2764 C, A, A

DTC P0218

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0218

Transmission Fluid Overtemperature

Circuit/System Description

The primary source of heat in the transmission is the torque converter. Hot oil exits the torque converter through
the torque converter clutch (TCC) control valve and flows to the transmission cooler supply line. The supply
line connects to the cooler, which is in the radiator. From the cooler, the oil returns through the oil cooler return
line and enters the lubrication circuits. After lubricating the internal components, the oil returns to the oil pan.
The transmission fluid temperature (TFT) sensor is located in the control solenoid (w/body and TCM) valve
assembly.

Conditions for Running the DTC

The TFT is -39 to +149°C (-38 to +300°F) for 5 seconds.

Conditions for Setting the DTC

The TFT is greater than 140°C (284°F) for 1 minute.

Action Taken When the DTC Sets

l DTC P0218 is a Type C DTC.

l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTC P0218 is a Type C DTC.

Diagnostic Aids

The driver information center (DIC), if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the

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TFT reaches 132°C (270°F). The TFT on the scan tool should rise steadily to a normal operating temperature,
and then stabilize. Ask about the customer's driving habits, trailer towing, etc. Trailer towing should occur in
D4. Ensure the engine cooling system is functioning normally.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

1. Review the Failure Records when the DTC set.

¡ If the engine coolant temperature (ECT) was above 125°C (257°F) when the DTC set, go to Engine
Overheating and correct that concern first.
2. Perform the Transmission Fluid Check to verify correct fluid level and condition.

Circuit/System Testing

1. Inspect the transmission cooling system for restrictions or damage.

2. Perform the Transmission Fluid Cooler Flushing and Flow Test (J 45096) to verify proper
transmission oil cooler flow.
¡ If a concern is found, repair or replace the damaged components as necessary.

3. Perform the Line Pressure Check to verify proper transmission line pressure.
¡ If a concern is found repair or replace the damaged components as necessary.

Repair Procedures

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1. Repair or replace the automatic transmission cooler or lines as necessary.

2. Perform the Service Fast Learn Adapts.

Repair Verification

1. With a scan tool, clear the DTCs.

2. Operate the vehicle long enough to ensure the engine has reached normal operating temperature and the
TFT has stabilized between 80-98°C (176-208°F).
3. Observe the specific DTC, and ensure DTC P0218 has run and passed.
4. Check for any other DTCs that you have not diagnosed.

DTC P0562 OR P0563

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0562

System Voltage High

DTC P0563

System Voltage Low

Circuit/System Description

The transmission control module (TCM) continuously monitors the system voltage on the Ignition 1 voltage
circuits. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly.
Improper solenoid operation may cause erratic transmission operation, which may result in internal damage.

Conditions for Running the DTC

P0562

l Ignition voltage has been greater than 12 volts for 1 second this ignition cycle.
l Engine speed is 1200 RPM or greater.

P0563

Ignition voltage has been greater than 12 volts for 1 second this ignition cycle.

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Conditions for Setting the DTC

P0562

The TCM detects system voltage is 11 volts or less for 10 seconds.

P0563

The TCM detects system voltage is 18 volts or greater for 10 seconds.

Action Taken When the DTC Sets

DTCs P0562 and P0563 are Type C DTCs.

Conditions for Clearing the DTC

DTCs P0562 and P0563 are Type C DTCs.

Diagnostic Aids

l Observe the driver information center (DIC) messaging that would indicate the electrical system requires
service.
l Inspect for the following conditions:
¡ Loose or damaged terminals at the generator

¡ Loose or worn generator drive belt

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

DTC Type Reference

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l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

Engine ON, measure and record the battery voltage with a DMM. The battery voltage should be between 12.5-
14.5 volts.

¡ If the voltage is not within the specified value, or the charge indicator light is ON, go to Charging
System Test .

Circuit/System Testing

Engine ON, the scan tool Ignition voltage parameter should display between 12.5-14.5 volts.

¡ If the voltage is not within the specified value, test the ignition voltage circuit for an open circuit or short
to ground.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts.

DTC P0601, P0602, P0603, P0604, OR P1621

DTC Descriptors

DTC P0601

Transmission Control Module (TCM) Read Only Memory (ROM)

DTC P0602

Transmission Control Module (TCM) Not Programmed

DTC P0603

Transmission Control Module (TCM) Long Term Memory Reset

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DTC P0604

Transmission Control Module (TCM) Random Access Memory (RAM)

DTC P1621

Transmission Control Module (TCM) Long Term Memory Performance

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

This is an internal fault detection of the control solenoid (w/body and TCM) valve assembly. This fault is
handled inside the control solenoid (w/body and TCM) valve assembly and no external circuits are involved.

Conditions for Running the DTC

l The control solenoid (w/body and TCM) valve assembly runs the program to detect an internal fault when
the key is ON or the engine is running.
l Ignition voltage is 8-18 volts.

Conditions for Setting the DTC

The control solenoid (w/body and TCM) valve assembly has detected an internal malfunction.

Action Taken When the DTC Sets

l DTCs P0601, P0602, P0603, P0604, and P1621 are Type A DTCs.
l The TCM shifts to a default gear, shuts down, and turns OFF.

Conditions for Clearing the DTC

DTCs P0601, P0602, P0603, P0604, and P1621 are Type A DTCs.

Diagnostic Aids

When attempting to set TCM internal DTCs let the engine run for at least 1 minute and then shut the engine off
for 30 seconds. Following this procedure will allow for a complete TCM shutdown. Reprogram the TCM and
retest the DTC to see if the DTC resets.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

1. Start the engine.

2. Let the engine run for 1 minute, then shut the engine OFF for 30 seconds.
3. Retest for DTCs P0601, P0602, P0603, P0604, and P1621.

Circuit/System Testing

Reprogram the TCM and recheck for DTCs.

¡ If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts.

DTC P0634

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

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l Review Strategy Based Diagnosis for an overview of the diagnostic approach.

l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0634

Transmission Control Module (TCM) Overtemperature

Circuit/System Description

The control solenoid (w/body and TCM) valve assembly has a built-in TCM temperature sensor to detect
possible overtemperature conditions of the TCM. This fault indicates the TCM is in an overtemperature
condition and the TCM has shut down to protect from possible heat damage to the TCM. The TCM will remain
off until the over temperature condition no longer exists.

Conditions for Running the DTC

l The engine is running.

l The TCM temperature is greater than -40°C (-40°F) and less than 160°C (320°F) for greater than 5
seconds.
l DTC P0634 is not set.

Conditions for Setting the DTC

l The TCM has detected an internal overtemperature condition greater than 142°C (288°F) for 10 seconds.
l Ignition voltage is equal to or greater than 18 volts and the TCM temperature is greater than 50°C (122°
F).

Action Taken When the DTC Sets

l DTC P0634 is a Type A DTC.

l The TCM shifts to a default gear, shuts down, and turns OFF.

Conditions for Clearing the DTC

DTC P0634 is a Type A DTC.

Diagnostic Aids

Inspect the transmission cooler, transmission fluid lines, engine cooling system, and transmission fluid level,
and inspect for any obstructions in the cooling system airflow which may cause an overheat condition. Inquire
about customer towing or extreme driving conditions. An engine cooling system or transmission cooling system
malfunction may cause this diagnostic to set. Perform the Control Solenoid Valve and Transmission Control
Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.

Reference Information

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Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

Start the engine and check for DTC P0634.

Circuit/System Testing

1. Start the engine.

2. Observe the transmission fluid temperature (TFT) and the engine coolant temperature (ECT). Ensure
there are no current overheat conditions present in these systems.
¡ If an overheating concern is found, diagnose and repair that system first.

3. Operate the vehicle under the same conditions as found in Failure Records and observe the TCM
Temperature parameter on the scan tool.
4. Recheck for DTCs.
¡ If the DTC resets, and the TCM power-up temperature sensor is not over 130°C (266°F), and the
TFT is less than 120°C (248°F), replace the control solenoid (w/body and TCM) valve assembly.
¡ If the TCM power-up temperature sensor is over 130°C (266°F), inspect and repair the transmission
cooler, transmission cooler fluid lines, engine cooling system, and transmission fluid level, and
inspect for any obstructions in the cooling system airflow which may cause an overheat condition.
5. Inquire about customer towing or extreme driving conditions.

Component Testing

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Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0667, P0668, OR P0669

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0667

Transmission Control Module (TCM) Temperature Sensor Performance

DTC P0668

Transmission Control Module (TCM) Temperature Sensor Circuit Low Voltage

DTC P0669

Transmission Control Module (TCM) Temperature Sensor Circuit High Voltage

Circuit/System Description

The transmission control module (TCM) temperature sensor is located inside of the control solenoid (w/body
and TCM) valve assembly and is not serviced separately. The TCM temperature sensor provides the
temperature of the TCM. This temperature reading is used in various shifting and diagnostic routines in the
TCM software. This fault is handled inside the TCM and no external circuits are involved.

Conditions for Running the DTC

l The engine speed is greater than 450 RPM.

l No DTCs P0716, P0717, P0722, or P0723.

P0667

l No DTCs P0667, P0711, P0712, or P0713.

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l DTC P0667 has not passed this key ON.

l The TCM temperature is between -39 and +149°C (-38 and +300°F).

P0668

DTC P0668 has not failed this ignition cycle.

P0669

l The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
l The TCC slip speed is equal to or greater than 120 RPM for 200 seconds or greater.
l DTC P0669 has not failed this ignition cycle.

Conditions for Setting the DTC

P0667

Fail Case 1

l Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
l Torque converter clutch (TCC) slip speed is greater than 120 RPM for 300 seconds cumulative.
l The TCM temperature is between -40 and +21°C (-40 and +70°F).
l The TCM temperature has changed by less than 2.0°C (3.6°F) in 100 seconds.
l The transmission fluid temperature (TFT) is greater than 70°C (158°F).
l The TFT has increased by 55°C (99°F) since startup.

Fail Case 2

l Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
l TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
l The TCM temperature is between 120-150°C (248-302°F).
l The TCM temperature has changed by less than 2.0°C (3.6°F) in 100 seconds.
l The TFT is greater than 70°C (158°F).
l The TFT has increased by 55°C (99°F) since startup.

Fail Case 3

The TCM temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

P0668

The TCM temperature is greater than or equal to 161°C (321°F) for greater than 10 seconds.

P0669

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The TCM temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

Action Taken When the DTC Sets

l DTCs P0667, P0668, and P0669 are Type C DTCs.

l The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTCs P0667, P0668, and P0669 are Type C DTCs.

Diagnostic Aids

Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and
Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM)
valve assembly.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

P0667

1. Start the engine and operate the vehicle at 64 km/h (40 mph) while observing the TCM power up

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temperature sensor and the TCM temperature sensor.

2. The system is operating normally if the TCM power up temperature is within 10°C (18°F) of the TCM
temperature sensor.

P0668 and P0669

Start the engine and check for DTCs P0668 and P0669.

Circuit/System Testing

1. Clear the DTC and operate the vehicle under the condition for running and setting the DTC.
2. Verify that the DTC does not reset.
¡ If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0711, P0712, OR P0713

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0711

Transmission Fluid Temperature (TFT) Sensor Performance

DTC P0712

Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

DTC P0713

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Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Circuit/System Description

The transmission fluid temperature (TFT) sensor is located inside of the transmission control module (TCM)
assembly and is not serviced separately. The TFT sensor provides transmission fluid temperature to the TCM.
This fault is handled inside the TCM and no external circuits are involved.

Conditions for Running the DTC

The engine speed is greater than 450 RPM.

P0711

l No DTCs P0711, P0716, P0717, P0722, or P0723.

l DTC P0711 not passed this key ON.
l The TCM temperature sensor is between -39 and +149°C (-38 and +300°F).

P0712

DTC P0712 is not failed this ignition cycle.

P0713

l The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
l The torque converter clutch (TCC) slip speed is equal to or greater than 120 RPM for 200 seconds or
greater.
l DTC P0713 is not failed this ignition cycle.

Conditions for Setting the DTC

P0711

Fail Case 1

l Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
l TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
l The TFT is between -40 and +21°C (-40 and +70°F).
l The TFT has changed by less than 2.0°C (3.6°F) in 100 seconds.
l The engine coolant temperature (ECT) is greater than 70°C (158°F).
l The ECT has increased by 55°C (99°F) since startup.

Fail Case 2

l Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.

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l TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
l The TFT is between 120-150°C (248-302°F).
l The TFT has changes by less than 2.0°C (3.6°F) in 100 seconds.
l The ECT is greater than 70°C (158°F).
l The ECT has increased by 55°C (99°F) since startup.

Fail Case 3

The TCM power up temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

P0712

The TCM power up temperature is greater than or equal to 171°C (340°F) for greater than 10 seconds.

P0713

The TFT is less than or equal to -77°C (-106°F) for greater than 25 seconds.

Action Taken When the DTC Sets

l DTCs P0711, P0712, and P0713 are Type C DTCs.

l The TCM freezes transmission adaptive functions.
l The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTCs P0711, P0712, and P0713 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

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Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

1. Start the engine and operate the vehicle at 64 km/h (40 mph) while observing the TCM start up
temperature sensor and the TFT sensor.
2. The system is operating normally if the TCM start up temperature is within 10°C (18°F) of the TFT
temperature.

Circuit/System Testing

Clear the DTC and operate the vehicle under the conditions for running and setting the DTC. Verify that the
DTC does not reset.

¡ If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0716 OR P0717

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0716

Input Speed Sensor Performance

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

DTC P0717

Input Speed Sensor Circuit Low Voltage

Diagnostic Fault Information

DTC P0716 or P0717

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Input Speed Sensor Supply Voltage P0716, P0717 P0716, P0717 P0716, P0717 P0716
Input Speed Sensor Signal P0716, P0717 P0716, P0717 P0716, P0717 P0716

Typical Scan Tool Data

ISS Signal
Short to Open/High Short to
Circuit Normal Range Ground Resistance Voltage
Operating Conditions: Engine running, normal operating temperature
ISS Signal 450-7,000 RPM 0 RPM 0 RPM 0 RPM
ISS/OSS Supply Voltage - 0 RPM 0 RPM 0 RPM

ISS/OSS Supply Voltage

Short to Open/High Short to
Circuit Normal Range Ground Resistance Voltage
Operating Conditions: Key ON, Engine OFF or Engine running, normal operating temperature
ISS Signal OK OK OK OK
ISS/OSS Supply Voltage OK Out of range Out of range Out of range
8.3-9.3 Volts = OK
Any other voltage = Out of range

Circuit/System Description

The input speed sensor (ISS) is a hall-effect type sensor. The ISS mounts to the control valve upper body
assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and
connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives
8.3-9.3 volts on the input/output speed sensor (ISS/OSS) Supply Voltage circuit from the transmission control
module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based
on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS
signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and
TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, torque
converter clutch (TCC) slip speed and gear ratio.

Conditions for Running the DTC

P0716

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l No ISS DTC P0717.

l No OSS DTCs P0722 or P0723.
l The engine run time is greater than 5 seconds.
l The vehicle speed is greater than 16 km/h (10 mph).
l The calculated throttle position is greater than 8 percent.

P0717

l No OSS DTCs P0722 or P0723.

l The vehicle speed is greater than 16 km/h (10 mph).
l The engine torque is greater than 50 N.m (37 lb ft).

Conditions for Setting the DTC

P0716

l The TCM detects an unrealistic drop in input shaft speed.

l ISS DTC P0716 is not failed this ignition.
l Transmission input speed is 686 RPM or greater for 2 seconds.
l Transmission input speed drops 653 RPM for greater than 4 seconds and does not recover.

P0717

l The TCM detects no output shaft speed when there is vehicle speed.
l DTC P0717 is not failed this ignition.
l Transmission input shaft speed is less than 100 RPM for 5 seconds.

Action Taken When the DTC Sets

l P0716 and P0717 are Type A DTCs.

l The TCM freezes transmission adaptive functions.
l The TCM turns OFF all solenoids.

Conditions for Clearing the DTC

P0716 and P0717 are Type A DTCs.

Diagnostic Aids

Inspect the ISS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic
debris and the 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Proper
torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal
test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness
connector or a component harness connector. See Special Tools.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

J 35616 GM-Approved Terminal Test Kit. See Special Tools.

Circuit/System Verification

Start the engine in Park and observe the transmission ISS on the scan tool while varying the engine speed. The
transmission ISS should vary with the engine speed and not drop out.

Circuit/System Testing

1. With the ignition ON, observe the transmission ISS/OSS supply voltage circuit status on the scan tool, the
parameter should display OK.
¡ If the circuit status does not display OK, disconnect the ISS/OSS connector from the control
solenoid (w/body and TCM) valve assembly and recheck the scan tool display.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

¡If the transmission ISS/OSS supply voltage circuit status still displays OK, visually inspect the ISS,
harness, connector, the control solenoid (w/body and TCM) valve assembly pins for metallic debris
and 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Repair
or replace any damaged components.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft
Speed/Output Shaft Speed Input Test. The scan tool should display Transmission ISS between 100-400
RPM.
¡ If 100-400 RPM ISS RPM is displayed, replace the ISS/OSS assembly.

¡ If no ISS RPM is displayed or the RPM is out of range, replace the control solenoid (w/body and
TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft
Speed/Output Shaft Speed Input Test.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

l Perform the Input and Output Speed Sensor Replacement.

l Control solenoid (w/body and TCM) valve assembly - refer to Control Module References for
replacement, setup, and programming.
l Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
l Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft
Speed/Output Shaft Speed Input Test.
l Perform the Service Fast Learn Adapts.

DTC P0722 OR P0723

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0722

Output Speed Sensor (OSS) Circuit Low Voltage

DTC P0723

Output Speed Sensor (OSS) Intermittent

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Diagnostic Fault Information

DTC P0722 or P0723

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
OSS Supply Voltage P0722, P0723 P0722, P0723 P0722, P0723 P0723
OSS Signal P0722, P0723 P0722, P0723 P0722, P0723 P0723

Typical Scan Tool Data

Input Speed Sensor (ISS) Signal

Short to Open/High Short to
Circuit Normal Range Ground Resistance Voltage
Operating Conditions: Engine running, normal operating temperature
ISS Signal 0-7,000 RPM 0 RPM 0 RPM 0 RPM
ISS/OSS Supply Voltage - 0 RPM 0 RPM 0 RPM
8.3-9.3 Volts = OK, Any other voltage = Out of range

ISS/OSS Supply Voltage

Short to Open/High Short to
Circuit Normal Range Ground Resistance Voltage
Operating Conditions: Key ON, Engine OFF or Engine running, normal operating temperature
ISS Signal OK OK OK OK
ISS/OSS Supply Voltage OK Out of range Out of range Out of range
8.3-9.3 Volts = OK, Any other voltage = Out of range

Circuit/System Description

The output speed sensor (OSS) is a hall-effect type sensor. The OSS mounts to the control valve upper body
assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and
connector. The sensor faces the output shaft machined teeth surface. The sensor receives 8.3-9.3 volts on the
input/output speed sensor (ISS/OSS) supply voltage circuit from the transmission control module (TCM). As
the output shaft rotates, the sensor produces a signal frequency based on the machined surface of the output
shaft. This signal is transmitted through the OSS signal circuit to the TCM. The TCM uses the OSS signal to
determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

Conditions for Running the DTC

P0722

l No ISS DTC P0717.

l No OSS DTC P0723.
l The selected range is not PARK or NEUTRAL.
l The vehicle speed is greater than 16 km/h (10 mph).

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l The transmission input speed is between 500-6,500 RPM.

l The engine speed is between 3,000-5,000 RPM.
l The calculated throttle position is greater than 8 percent.

P0723

l No ISS DTCs P0716 or P0717.

l No OSS DTC P0722.
l The engine run time is greater than 5 seconds.
l Greater than 6 seconds since last range change.

Conditions for Setting the DTC

P0722

l The TCM detects no output shaft speed when there is vehicle speed.
l The transmission output speed is less than or equal to 70 RPM for 5 seconds.

P0723

l The TCM detects an unrealistic drop in output shaft speed.

l ISS DTC P0723 has not failed this ignition.
l The transmission output speed is 1,000 RPM or greater for 2 seconds.
l The transmission output speed drops 1,300 RPM for greater than 4 seconds and does not recover.

Action Taken When the DTC Sets

l The TCM freezes transmission adaptive functions.

l The TCM turns OFF all solenoids.

Conditions for Clearing the DIC/DTC

DTCs P0722 and P0723 are Type A DTCs.

Diagnostic Aids

Inspect the OSS, harness, connector and control solenoid (w/body and TCM) valve assembly pins for metallic
debris and output shaft machined face for damage or misalignment. Proper torque of the OSS mounting bolt is
critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires
probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness
connector. See Special Tools.

Reference Information

Schematic Reference

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

J 35616 GM-Approved Terminal Test Kit. See Special Tools.

Circuit/System Verification

Operate the vehicle at 16-32 km/h (10-20 mph) while observing the transmission OSS on the scan tool. The
transmission OSS should vary with the vehicle speed and not drop out.

Circuit/System Testing

1. Turn the ignition ON.

2. Observe the transmission ISS/OSS supply voltage circuit status on the scan tool. The parameter should
display OK.
¡ If the parameter does not display OK, disconnect the ISS/OSS connector from the control solenoid
(w/body and TCM) valve assembly and recheck the scan tool display.
¡ If the transmission ISS/OSS supply voltage circuit status still displays OK, visually inspect the
OSS, harness, connector, the control solenoid (w/body and TCM) valve assembly pins for metallic
debris and output shaft machined surface for damage or misalignment.

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¡Repair or replace the damaged components.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft
Speed/Output Shaft Speed Input Test.
¡ The scan tool Transmission OSS parameter should display 100-400 RPM.

¡ If the Transmission OSS parameter is between 100-400 RPM, replace the ISS/OSS assembly.

¡ If no OSS RPM is displayed or the parameter is out of range, replace the control solenoid (w/body
and TCM) valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

l Perform the Input and Output Speed Sensor Replacement.

l Control solenoid (w/body and TCM) valve assembly - refer to Control Module References for
replacement, setup, and programming.
l Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
l Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft
Speed/Output Shaft Speed Input Test.
l Perform the Service Fast Learn Adapts.

DTC P0736

DTC Descriptor

DTC P0736

Incorrect Reverse Ratio

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

The clutch pressure control (PC) solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts
fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to the 3-5-R
clutch. The transmission fluid pressure (TFP) switch 1 Opens (high) under fluid pressure and closes (low) when
no pressure is present. The transmission control module (TCM) calculates gear ratio based on data from the
automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the
known transmission gear ratio to a calculated gear ratio for each commanded gear.

Conditions for Running the DTC

l 3-5-R clutch is the primary on-coming clutch.

l The commanded gear is Reverse.

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Conditions for Setting the DTC

TFP Switch 1 = Low (No fluid pressure)

Action Taken When the DTC Sets

DTC P0736 is a Type A DTC.

Conditions for Clearing the DTC

DTC P0736 is a Type A DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.
If there are any other transmission DTCs set, diagnose those first.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

1. Operate the vehicle to induce a shift from second to third gear while observing TFP Switch 1. Perform
this action 2 times. The TFP Switch 1 should change states from Low to High.

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

¡If the TFP Switch does not change states and no other DTCs set, replace the control solenoid
(w/body and TCM) valve assembly.
¡ If any other DTCs set, diagnose that DTC first.

2. Operate the vehicle to obtain sixth gear 2 times and then check for DTCs other than DTC P0736.
¡ If any other DTCs set, diagnose that DTC first.

¡ If no other DTC sets, continue on with diagnostics.

3. Operate the vehicle by shifting from Park to Reverse, then while in reverse, operate the vehicle with the
calculated throttle position greater than 8% for 5 seconds, perform this maneuver a minimum of 3 times.
¡ If the DTC P0736 resets, go to Component Testing.

Component Testing

1. Perform the Line Pressure Check.

2. Inspect the check ball 5 for possible sticking or damage.
¡ If you found a concern with this check ball, repair the concern.

3. Inspect the shift select valve 3 for sticking or damage.

¡ If you found a concern with the shift select valve 3, repair or replace the valve or valve body.

4. Inspect the low and reverse clutch assembly for wear or damage.
¡ If you found a low and reverse clutch assembly concern, repair or replace the low and reverse
clutch assembly as necessary.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

l Control solenoid (w/body and TCM) valve assembly. Refer to Control Module References for
replacement, setup, or programming.
l Low and reverse clutch assembly replacement. Refer to Low and Reverse Clutch Overhaul in Unit
Repair.
l Lower valve body assembly. Refer to Control Valve Lower Body and Upper Body Replacement.
¡ Perform the valve body inspection procedure, refer to Control Valve Upper Body Assembly
Cleaning and Inspection in Unit Repair.
¡ If the inspection procedure indicates to replace the valve body, refer to Control Valve Lower
Body and Upper Body Replacement.
l Perform the Service Fast Learn Adapts.

DTC P0741 OR P0742

DTC Descriptors

DTC P0741

Torque Converter Clutch (TCC) - Stuck Off

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

DTC P0742

Torque Converter Clutch (TCC) - Stuck On

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

The torque converter clutch (TCC) pressure control (PC) solenoid is part of the control solenoid (w/body and
TCM) valve assembly and is not serviced separately. The shift solenoid (SS) 1 supplies transmission fluid to the
TCC PC solenoid when commanded OFF. The TCC PC solenoid regulates transmission fluid through the TCC
regulator valve in the lower valve body and the TCC control valve in the pump, to the TCC when commanded
ON and exhausts fluid when commanded OFF. When the TCC is applied, the engine is coupled directly to the
transmission.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTCs P0722 or P0723.
l No DTCs P2762, P2763, or P2764.
l No DTCs P0741 or P0742.
l The engine run time is greater than 5 seconds.
l The transmission fluid temperature (TFT) is 20-130°C (68-266°F).
l The calculated throttle position is between 8-90 percent.
l The engine torque is greater than 50 N.m (36 lb ft).
l The 2nd gear ratio is between 1.42-1.63.
l The 4th gear ratio is between 1.06-1.23.
l The 5th gear is between 0.79-0.90.
l The 6th gear is between 0.62-0.71.
l The TCC is commanded ON and is equal to or greater than 800 kPa for 2 seconds.

Conditions for Setting the DTC

DTC P0741

The TCM detects TCC slip greater than 50 RPM for 6 seconds when the TCC is commanded ON. This must
occur 2 times.

DTC P0742

The TCM detects the TCC slip between -12 and +13 RPM for 4 seconds when the TCC is commanded OFF.
This must occur 3 times.

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Action Taken When the DTC Sets

l DTCs P0741 and P0742 are Type B DTCs.

l Inhibit high gear in Hot Mode.
l The TCM inhibits TCC.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P0741 and P0742 are Type B DTCs.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

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Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Operate the vehicle in drive with the calculated throttle position greater than 8 percent and ensure TCC is
commanded ON and OFF a minimum of 5 times.
¡ If the DTC resets, go to Component Testing.

Component Testing

1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning in an
attempt to clean or free up a potential sticking valve of dirt or debris.
¡ If the DTC resets after the cleaning procedure perform the Control Solenoid Valve and
Transmission Control Module Assembly Inspection.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test to test for a stuck open or stuck closed TCC PC solenoid valve inside of the control
solenoid (w/body and TCM) valve assembly.
¡ If a stuck open or closed valve is found, replace the control solenoid (w/body and TCM) valve
assembly.
3. Inspect the lower control valve body for a stuck valve, debris or damage.
¡ If you found a valve body concern, repair or replace the lower control valve body as necessary.

4. Inspect the TCC control valve in the pump.

¡ If you found a TCC control valve concern, repair or replace the TCC control valve or pump as
necessary.
5. Inspect the torque converter assembly for damage or discoloration.
¡ If you found a torque converter assembly concern, replace the torque converter assembly as
necessary.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

l Control valve body replacement: Refer to Control Valve Lower Body and Upper Body Replacement.
l Perform the Torque Converter Replacement.
l control solenoid (w/body and TCM) valve assembly replacement: Refer to Control Module References
for replacement, setup, and programming.
l Transmission pump repair or replacement: Refer to Torque Converter Housing with Fluid Pump
Removal and Torque Converter Housing with Fluid Pump Installation in the Transmission Unit
Repair Manual.
l Perform the Service Fast Learn Adapts.

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 2006 Cadillac XLR
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DTC P0751

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0751

Shift Solenoid (SS) 1 Valve Performance - Stuck Off

Circuit/System Description

The shift solenoid (SS) valve 1 is part of the lower control valve body. The SS valve 1 is a normally closed
(NC) solenoid valve and controls fluid to the clutch select valve 3- and related clutches. During this diagnostic
test, intrusive actions are taken by the transmission control module (TCM) to test the SS valve 1 to see if the
valve is stuck OFF. When in first gear engine braking, if first gear ratio is not achieved in a predetermined
period of time and the closest gear ratio detected if fourth, the TCM commands second gear and if second gear
ratio is attained this indicates a stuck OFF SS valve 1 and the DTC will set.

Conditions for Running the DTC

l No DTCs P0716, P0717, P0722 or P0723.

l No DTCs P1915 or P1825.
l First gear locked is commanded.
l Commanded gear slip is equal to or less than 75 RPM for 2 seconds.

Conditions for Setting the DTC

Fail Case 1 and Fail Case 2 must occur in sequential order.

Fail Case 1

Commanded gear equals first lock and gear box slip equals greater than 100 RPM for 3 seconds.

Fail Case 2

Commanded gear equals first lock and gear ratio equals fourth and gear box slip is between 35-100 RPM within
0.5-1.0 seconds.

Action Taken When the DTC Sets

DTC P0751 is a Type A DTC.

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 2006 Cadillac XLR
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Conditions for Clearing the DTC

DTC P0751 is a Type A DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Operate the vehicle in drive from a complete stop, with the calculated throttle position greater than 15
percent to obtain 56 km/h (35 mph) 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

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1. Perform the Line Pressure Check.

¡ If the pressure is out of specification correct that concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the shift solenoid 1 is found to be leaking or stuck OFF, replace the control solenoid (w/body and
TCM) valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, or programming.
2. Perform the Service Fast Learn Adapts.

DTC P0752

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0752

Shift Solenoid (SS) 1 Valve Performance - Stuck On

Circuit/System Description

The shift solenoid (SS) valve 1 is part of the lower control valve body. The SS valve 1 is a normally closed
(NC) solenoid valve and controls fluid to the clutch select valve 2 and related clutches. The transmission control
module (TCM) looks for a good shifts from first gear engine braking, to first gear freewheel, to second gear and
then if third gear indicates neutral, and the TFP Sw 5 does not change states, the TCM sets the DTC.

Conditions for Running the DTC

l No DTCs P0716, P0717, P0722, or P0723.

l No DTCs P1825 or P1915.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Conditions for Setting the DTC

l The commanded gear is third.

l The attained gear slip is equal to or greater than 75 RPM for 2 seconds.
l The TFP Switch 5 does not change states after third gear command.
l Commanded gear has achieved first lock, first freewheel or second gear and current commanded gear
equals third, gear box slip is equal to or greater than 100 RPM for 3 seconds.

Action Taken When the DTC Sets

DTC P0752 is a Type A DTC.

Conditions for Clearing the DIC/DTC

DTC P0752 is a Type A DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Operate the vehicle in drive from a complete stop, with the calculated throttle position greater than 15
percent to obtain 72 km/h (45 mph) 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check.

¡ If the pressure is out of specification correct that concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the shift solenoid 1 is found to be leaking or stuck ON, replace the control solenoid (w/body and
TCM) valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly - refer to Control Module References
for replacement, setup, or programming.
2. Perform the Service Fast Learn Adapts.

DTC P0756

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0756

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Shift Solenoid (SS) 2 Valve Performance - Stuck Off

Circuit/System Description

The shift solenoid (SS) valve 2 is part of the lower control valve body. The SS valve 2 is a normally closed
(NC) solenoid valve and controls fluid to the clutch select valve 3- and related clutches. During this diagnostic
test, intrusive actions are taken by the transmission control module (TCM) to test the SS valve 2 to see if the
valve is stuck OFF. When in first gear engine braking, if first gear ratio is not achieved in a predetermined
period of time, the TCM commands second gear and if second gear ratio is attained this indicates a stuck OFF
SS valve 2 and the DTC will set.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTC P0722 or P0723.
l No DTCs P1825 or P1915.
l Calculated throttle position is equal to or greater than 10 percent.
l Engine torque is between 120-1,492 N.m (89-1,100 lb ft).
l Transmission fluid temperature (TFT) is equal to or greater than 0°C (32°F).

Conditions for Setting the DTC

l The TCM detects second gear ratio is achieved.

l Fail Case 1 and Fail Case 2 must occur in sequential order.

Fail Case 1

Commanded gear equals first lock or first freewheel and gearbox slip is equal or greater than 100 RPM.

Fail Case 2

Commanded gear equals second and second gear box slip is less than or equal to 35 RPM or gear box slip is
equal to or less than 100 RPM and shift time-out occurs and PC Sol 4 commanded pressure is at maximum.

Action Taken When the DTC Sets

DTC P0756 is a Type A DTC.

Conditions for Clearing the DTC

DTC P0756 is a Type A DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Special Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Operate the vehicle in drive with the calculated throttle position greater than 15 percent to obtain 56 km/h
(35 mph) 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check.

¡ If the pressure is out of specification correct that concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the solenoid is found to be leaking or stuck OFF, replace the control solenoid (w/body and TCM)
valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, or programming.
2. Perform the Service Fast Learn Adapts.

DTC P0776 OR P0777

DTC Descriptors

DTC P0776

Clutch Pressure Control (PC) Solenoid 2 - Stuck Off

DTC P0777

Clutch Pressure Control (PC) Solenoid 2 - Stuck On

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF
and exhausts fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to
the 3-5-R clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed
sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a
calculated gear ratio for each commanded gear.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTCs P0722 or P0723.
l No DTCs P1825 or P1915.
l Transmission Fluid Temperature (TFT) is equal to or greater than 0°C (32°F).

DTC P0776

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l The transmission input shaft speed is greater than 60 RPM.

l 3-5-R clutch is commanded ON.

DTC P0777

l The transmission output shaft speed is greater than 200 RPM.

l 3-5-R clutch is commanded OFF.

Conditions for Setting the DTC

DTC P0776

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 3-5-R clutch is commanded ON
for 0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the anticipated input shaft
speed.

DTC P0777

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 3-5-R clutch is commanded OFF
for 0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated input shaft
speed.

Action Taken When the DTC Sets

l DTCs P0776 and P0777 are Type A DTCs. Refer to Diagnostic Trouble Code (DTC) Type Definitions
and Diagnostic Trouble Code (DTC) List/Type.
l The TCM commands maximum line pressure.
l The TCM inhibits TCC.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P0776 and P0777 are Type A DTCs.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

l DT-47825 Control Solenoid Test Plate. See Special Tools.

l DT-47825-10 Jumper Harness. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Operate the vehicle in drive with the calculated throttle position greater than 15% to obtain 72 km/h (45
mph). Perform this maneuver 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check.

¡ If the pressure is out of specification, correct this concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

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 2006 Cadillac XLR
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4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and
TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris.
¡ If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Inspect the 3-5-R clutch assembly for damage.

¡ If a concern is found in the 3-5-R clutch assembly, repair or replace as necessary.

Component Testing

PC Sol 2 Operation
Operating Conditions Normal Operation Stuck OFF Stuck ON
Steady State Gears 3, 5 3, 5 Neutral 3, 5
Steady State Gears 1, 2, 4, 6 1, 2, 4, 6 1, 2, 4, 6 3, 5
Garage Shift Park/Neutral to Reverse/Drive Neutral 1 Drive Gear
Downshift from gears 4, 5, 6
3, 5 Neutral 3, 5
to 3, 5
Upshift from gears 3, 5 to 4, 5,
4, 5, 6 4, 5, 6 3, 5
6

Repair Procedures

l Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control valve body replacement. Refer to Control Valve Lower Body and Upper Body Replacement.

l 3-5-R clutch assembly repair or replace. Refer to 1-2-3-4 and 3-5 Reverse Clutch Overhaul in the
Transmission Unit Repair Manual.
l Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
l Perform the Service Fast Learn Adapts.

DTC P0796 OR P0797

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0796

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Clutch Pressure Control (PC) Solenoid 3 - Stuck Off

DTC P0797

Clutch Pressure Control (PC) Solenoid 3 - Stuck On

Circuit/System Description

The clutch pressure control (PC) solenoid 3 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The clutch PC solenoid 3 flows fluid to the low and reverse, and the 4-5-6 clutch.
The clutch PC solenoid 3 regulates the transmission fluid pressure to the low and reverse, and 4-5-6 clutch. The
TCM calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the
output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for
each commanded gear.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTCs P0722 or P0723.
l No DTCs P1825 or P1915.
l Transmission Fluid Temperature (TFT) is equal to or greater than 0°C (32°F).

DTC P0796

l The transmission input shaft speed is greater than 60 RPM.

l low and reverse/4-5-6 clutch is commanded ON.

DTC P0797

l The transmission output shaft speed is greater than 200 RPM.

l low and reverse/4-5-6 clutch is commanded OFF.

Conditions for Setting the DTC

DTC P0796

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the low and reverse/4-5-6 clutch is
commanded OFF for 0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the
anticipated input shaft speed.

DTC P0797

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the low and reverse/4-5-6 clutch is
commanded ON for 0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated
input shaft speed.

Action Taken When the DTC Sets

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l DTCs P0796 and P0797 are Type A DTCs.

l The TCM commands maximum line pressure.
l The TCM inhibits the torque converter clutch (TCC).
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P0796 and P0797 are Type A DTCs.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l DT-47825 Control Solenoid Test Plate. See Special Tools.

l DT-47825-10 Jumper Harness. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Turn ON the ignition, with the engine OFF.

IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Freeze
Frame and Failure Records.

3. Record the DTC Freeze Frame and Failure Records.

4. Clear the DTC.
5. Operate the vehicle in DRIVE with the calculated throttle position greater than 15% to obtain 72 km/h
(45 mph) and achieve 5th gear. Perform this maneuver 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check

¡ If the pressure is out of specification, correct this concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and
TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris.
¡ If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Inspect the low and reverse/4-5-6 clutch assembly for damage.

¡ If a concern is found in the low and reverse/4-5-6 clutch assembly, repair or replace as necessary.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

PC Sol 3 Operation
Exercise Normal Operation Stuck OFF Stuck ON
1st Free Wheel,
Steady State Gears 1st Braking 4, 5, 6 1st Braking, 4, 5, 6 1st Braking, 4, 5, 6
Neutral

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Steady State Gears, 1 Free Wheel 2, 3 1st Free Wheel, 2, 3 1st Free Wheel, 2, 3 1st Braking, 4, 5, 6
Park/Neutral to Neutral 1st Free
Garage Shift Drive Gear
Reverse/Drive Wheel
Downshift from gears 4, 5, 6 to 1, 2, 3 1st Free Wheel, 2, 3 1st Free Wheel, 2, 3 1st Braking, 4, 5, 6
Upshift from gears 1, 2, 3 to 4, 5, 6 4, 5, 6 Neutral 4, 5, 6

Repair Procedures

l Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control valve body replacement. Refer to Control Valve Lower Body and Upper Body Replacement.

l low and reverse/4-5-6 clutch assembly repair or replace. Refer to Low and Reverse Clutch Overhaul
and 4-5-6 Clutch Overhaul in the Transmission Unit Repair Manual.
l control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
l Perform the Service Fast Learn Adapts.

DTC P0815, P0816, P0826, OR P1876

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0815

Upshift Switch Circuit

DTC P0816

Downshift Switch Circuit

DTC P0826

Up and Down Shift Switch Circuit

DTC P1876

Up and Down Shift Enable Switch Circuit Low Voltage

Diagnostic Fault Information

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 2006 Cadillac XLR
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Driver Shift Request

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Normal Range = None
Tap Up/Tap Down Switch Signal
0V 0V 5-12 V -
Circuit

Circuit/System Description

The TAP Shift/Driver Shift Control (DSC) allows the driver to shift gears by using the TAP switches located on
the automatic transmission shifter. Pushing forward on the shifter will command an upshift and pulling back
will command a downshift. Ignition voltage flows from the ignition 3 fuse through the TAP Switch resistor
array to the Transmission Control Module (TCM). The TAP system is activated when the gear shift lever is in
the D position and moved over into the DSC gate area. When the shifter is moved over into the DSC gate area,
the TAP enable switch is closed and completes the TAP enable circuit from the Body Control Module (BCM) to
ground.

Conditions for Running the DTC

The engine speed is between 500-6,500 RPM for at least 5 seconds.

P0815 or P0816

l No DTC P0826.
l No DTCs P1815 or P1826.
l The time since the last gear selector range change is greater than 6 seconds.

P0826

l Ignition voltage is 8.6-19.0 volts.

l Engine speed is 500-6500 RPM for at least 5 seconds.

P1876

l No DTC U0100.
l No DTCs P0815, P0816, or P0826.
l No DTCs P1825 or P1915.

Conditions for Setting the DTC

P0815

The TCM detects an upshift request for 3 seconds in PARK, REVERSE, NEUTRAL, or D and for 600 seconds
in PARK, REVERSE, NEUTRAL, OR D.

P0816

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

The TCM detects a downshift request for 3 seconds in PARK, REVERSE, NEUTRAL, or D and for 600
seconds in PARK, REVERSE, NEUTRAL, or D.

P0826

The TCM detects an invalid voltage on the TAP Up/Down Signal Circuit for 5 seconds.

P1876

The TCM detects a TAP Enable Switch request 3 times when not in D6 range for 2 seconds.

Action Taken When the DTC Sets

l DTCs P0815, P0816, P0826, and P1876 are Type C DTCs.

l The TCM disables TAP shift functions.

Conditions for Clearing the DTC

DTCs P0815, P0816, P0826, and P1876 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

P0815, P0816, or P0826

With the engine ON, engage the Tap Up and Tap Down switch positions while observing the Driver Shift
Request scan tool parameter. The parameter should change to reflect the selected Up or Downshift switch
position and with no Up or Downshift switch position selected the parameter should display None.

¡ If the parameter does not change to reflect the selected position, proceed to Circuit/System Testing.

P1876

With the engine ON, move the transmission range selector from the Park (P) range to the Drive (D6) range and
over into the DSC gate while observing the Tap Up/Down Enable parameter on the scan tool in Body and
Accessories/Instrument Panel scan tool data list. The parameter should display Enabled when in the DSC gate
area, and Disabled in all other ranges.

¡ If the parameter does not change when the transmission range selector is in the DSC gate, proceed to
Circuit/System Testing.

Circuit/System Testing

P0815

1. Select the Driver Shift Request parameter.

2. Disconnect the Automatic Transmission (AT) shift program switch connector.
¡ If the parameter status changes from Upshift to Invalid, replace the AT shift program switch.

¡ If the parameter status does not change, replace the control solenoid (w/body and TCM) valve
assembly.

P0816

1. Select the Driver Shift Request parameter.

2. Disconnect the Automatic Transmission (AT) shift program switch connector.
¡ If the parameter status changes from Downshift to Invalid, replace the AT shift program switch.

¡ If the parameter status does not change, replace the control solenoid (w/body and TCM) valve
assembly.

P0826

1. Inspect the fuse in the ignition 3 voltage circuit for an open.

¡ If the fuse is Open, test the ignition 3 and the Tap/Up and Tap/down circuit for a short to ground.

¡ If the fuse is OK, test the ignition 3 and the Tap/Up and Tap/down signal circuit for an Open or
Short to Voltage.
2. Test the AT/DSC shift program switch for correct resistance value, 8.11-8.39 ohms.
¡ If the resistance is not within specifications, replace the switch assembly.

¡ If the resistance is within specifications, replace the control solenoid (w/body and TCM) valve

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assembly.

P1876

Key On, engine Off, in PARK, disconnect the Tap Up/Tap Down Enable Switch connector from the switch.
Using a scan tool, observe the Tap Up/Down Enable parameter in Body and Accessories/Instrument Panel scan
tool data list. The parameter should display Disabled.

¡ If the parameter does not display Disabled while disconnected, test the Tap Up/Tap Down Enable signal
circuit for a short to ground. If no short to ground is found, replace the BCM.
¡ If the parameter displays Disabled when disconnected and Enabled when connected, ensure the
mechanical enable switch linkage is not bent, binding, or damaged and if no concerns are found, replace
the Tap Up/Tap Down Enable switch.
¡ If the parameter displays Disabled at all times, test the Tap Up/Tap Down ground circuit for an open or
short to voltage.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

l Replace the AT shift program switch. Refer to Automatic Transmission Control Replacement .
l Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, and programming.

DTC P0842 OR P0843

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0842

Transmission Fluid Pressure (TFP) Switch 1 Circuit Low Voltage

DTC P0843

Transmission Fluid Pressure (TFP) Switch 1 Circuit High Voltage

Diagnostic Fault Information

DTC P0842 or P0843

Short to Open/High Short to Signal

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 2006 Cadillac XLR
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Circuit Ground Resistance Voltage Performance

TFP Switch 1 Signal P0842 P0843 P0843 -
TFP Switch 3 Signal P0872 P0873 P0873 -
TFP Switch 4 Signal P0877 P0878 P0878 -
TFP Switch 5 Signal P0989 P0990 P0990 -

Typical Scan Tool Data

TFP Switches
Open/High
Circuit Short to Ground Resistance Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: 12 Volts = Hi, 0 Volts = Low
TFP Switch 1 Low Hi Hi
TFP Switch 3 Low Hi Hi
TFP Switch 4 Low Hi Hi
TFP Switch 5 Low Hi Hi

Circuit/System Description

The transmission fluid pressure (TFP) switch 1 is part of the control solenoid (w/body and TCM) valve
assembly and is not serviced separately. The TCM supplies 12 volts to the TFP Switch 1 on the TFP Switch 1
signal circuit; the TFP Switch 1 has an internal case ground. TFP Switch 1 is normally closed, Low. When oil
pressure is present at the TFP Switch 1, the switch is Open, High. The normally high clutch pressure control
(PC) solenoid 2 controls the transmission fluid to the 3-5-R clutch. The TCM monitors the normally closed TFP
Switch 1 signal circuit to determine the 3-5-R clutch status.

Conditions for Running the DTC

l No DTCs P0120, P0711, P0712, or P0713.

l No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
l No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
l No DTCs P1825 or P1915.
l Ignition voltage is between 11-15 volts.
l The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

Conditions for Setting the DTC

P0842

The TCM detects that the TFP switch 1 signal voltage remains low, 0 volts when the 3-5-R clutch is
commanded ON for 5 seconds.

P0843

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The TCM detects that the TFP switch 1 signal voltage is high, 12 volts when the 3-5-R clutch is commanded
OFF.

Action Taken When the DTC Sets

l DTCs P0842 and P0843 are Type C DTCs.

l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0842 and P0843 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

If there are any other transmission related DTCs set, diagnose those DTCs first.

Circuit/System Testing

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and observe the TFP Switch 1 parameter while moving the range selector lever from Park
to Reverse. The TFP Switch 1 should transition from Hi in Park to Low in Reverse.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

¡ If the TFP Switch 1 parameter does not change, perform the Control Solenoid Valve and
Transmission Control Module Assembly Inspection.
¡ If no concerns are found, replace the control solenoid valve and TCM assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0851 OR P0852

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0851

Park/Neutral Position (PNP) Switch Circuit Low Voltage

DTC P0852

Park/Neutral Position (PNP) Switch Circuit High Voltage

Diagnostic Fault Information

DTC P0851 or P0852

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Park/Neutral Signal P0851 P0852 P0852 -

Scan Tool Parameter Data

PNP Switch - ECM

Open/High
Circuit Short to Ground Resistance Short to Voltage

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Operating Conditions: Engine running, normal operating temperature

Parameter Normal Range: In-Gear, Park/Neutral
Park/Neutral Signal Park/Neutral In-Gear In-Gear

Circuit/System Description

The transmission manual shift shaft switch assembly, also known as the Internal Mode Switch (IMS), is a
sliding contact switch attached to the manual shift shaft inside the transmission case. The Park/Neutral Position
(PNP) Switch is integrated into the IMS and connects to the Transmission Control Module (TCM) lead-frame
through a short wire harness. The 5 inputs to the TCM from the transmission manual shift shaft switch assembly
indicate the transmission gear selector lever position. This information is used for engine start enable, engine
controls as well as determining the transmission shift patterns. The state of each input is available for display on
the scan tool. The five input parameters represented are Signal A, Signal B, Signal C, Signal P (Parity), and
Signal N (Park/Neutral Start Signal). Park/Neutral Signal is sent from the Park/Neutral switch directly to the
Engine Control Module (ECM) and is used for engine start enable. The Park/Neutral Signal circuit is not
connected to the TCM internally; the circuit uses the TCM as a pass-through connector only. The ECM
Park/Neutral diagnostic monitors the Park/Neutral Signal circuit to detect Low voltage when the ECM expects
to see High voltage and High voltage when the ECM expects to see Low voltage.

Conditions for Running the DTC

P0851

l Ignition voltage is between 9-18 volts.

l No TCM DTCs P0601, P0602, P0603, or P0604.
l No IMS DTCs P1825 or P1915.
l No Communication DTCs U0001, U0100, U0101, U2105, or U2106.

P0852

l No TP DTCs P0121, P0122, P0123.

l No OSS DTCs P0722 or P0723.
l No MAF DTCs P0101, P0102, or P0103.
l No MAP DTCs P0106, P0107, or P0108.
l Engine Speed is greater than 400 RPM.

Conditions for Setting the DTC

P0851

l The ECM detects the Park/Neutral switch signal equals 0 volts (Low) when the IMS reports a Drive range
for 3 seconds.
l TP is equal to or greater than 10 percent.
l Engine torque is equal to or greater than 75 N.m (55 lb ft).
l Vehicle speed is equal or greater than 10 km/h (6 mph).

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 2006 Cadillac XLR
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P0852

The ECM detects the Park/Neutral switch signal equals 12 volts (High) when the IMS reports a Park/Neutral
range for 3 seconds.

Action Taken When the DTC Sets

l DTC P0851 and P0852 are Type C DTCs.

l The ECM uses IMS Range for engine start-up.

Conditions for Clearing the DTC

DTC P0851 and P0852 are Type C DTCs.

Diagnostic Aids

It is possible for this DTC to set due to a stack-up or misalignment issue between the IMS and the P/N Switch,
where no electrical fault is present. Ensure the gear shift selector cable is properly adjusted and there are no
service bulletins that address this concern before replacing parts.

Reference Information

Schematic Reference

l Automatic Transmission Controls Schematics

l Engine Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views
l Engine Control Module Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

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 2006 Cadillac XLR
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Circuit/System Verification

If there are any other engine or transmission related DTCs set, diagnose those DTCs first. With a scan tool
observe the Park/Neutral switch parameter in Engine Controls data list and move the gear shift lever from Park,
to Reverse and through all the ranges and observe the parameter as you move the shift lever. The parameter
should display Park/Neutral when in Park or Neutral and In-Gear when in Reverse, Drive or Drive Low. It is
especially important to closely observe the Park and Neutral to Drive transitional positions while moving the
shift lever and observing for possible misalignment or slack in the shifter mechanism.

Circuit/System Testing

1. Ignition OFF, transmission in Park or Neutral, disconnect the transmission 16-way connector.
2. Test for less than 1 ohm of resistance between the Park/Neutral signal circuit terminal 3 on the
transmission side and the ground circuit terminal 5.
¡ If greater than the specified range, test the signal circuit inside the transmission for an open/high
resistance. If the circuit tests normal, test or replace the IMS.
3. Ignition On, verify the scan tool parameter Park/Neutral displays In-gear.
¡ If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal,
replace the ECM.
4. Install a fused jumper between the signal circuit and ground. Verify the scan tool parameter Park/Neutral
displays Park/Neutral.
¡ If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If
the circuit tests normal, replace the ECM.

Component Testing

1. Ignition OFF, transmission in Park or Neutral, disconnect the transmission 16-way connector and the IMS
from the control solenoid (w/body and TCM) valve assembly.
2. Test for infinite resistance between the control solenoid (w/body and TCM) valve assembly 16-way
connector pin 3 and the IMS connector pin on the control solenoid (w/body and TCM) valve assembly
side with the switch in the Open position.
¡ If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If
the circuit tests normal, replace the control solenoid (w/body and TCM) valve assembly.
3. Test for infinite resistance between the IMS connector pin F and the IMS case ground with the switch in
the Open position.
¡ If not the specified value, replace the IMS.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. ECM replacement. Refer to Control Module References for replacement, setup, and programming.
2. IMS replacement. Refer to Manual Shift Shaft Position Switch Replacement.
3. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References

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for replacement, setup, and programming.

DTC P0872 OR P0873

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0872

Transmission Fluid Pressure (TFP) Switch 3 Circuit Low Voltage

DTC P0873

Transmission Fluid Pressure (TFP) Switch 3 Circuit High Voltage

Diagnostic Fault Information

DTC P0872 or P0873

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
TFP Switch 1 Signal P0842 P0843 P0843 -
TFP Switch 3 Signal P0872 P0873 P0873 -
TFP Switch 4 Signal P0877 P0878 P0878 -
TFP Switch 5 Signal P0989 P0990 P0990 -

Typical Scan Tool Data

TFP Switches
Open/High
Circuit Short to Ground Resistance Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: 12 Volts = Hi, 0 Volts = Low
TFP Switch 1 Low Hi Hi
TFP Switch 3 Low Hi Hi
TFP Switch 4 Low Hi Hi
TFP Switch 5 Low Hi Hi

Circuit/System Description

The transmission fluid pressure (TFP) switch 3 is part of the control solenoid (w/body and TCM) valve

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assembly and is not serviced separately. The TCM supplies 12 volts to the TFP switch 3 on the TFP switch 3
signal circuit; the TFP switch 3 has an internal case ground. TFP switch 3 is normally closed, Low. When oil
pressure is present at the TFP switch 3, the switch is Open, High. The normally low clutch pressure control (PC)
solenoid 4 controls the transmission fluid to the 2-6 clutch. The TCM monitors the normally closed TFP switch
3 signal circuit to determine the 2-6 clutch status.

Conditions for Running the DTC

l No DTCs P0120, P0711, P0712, or P0713.

l No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
l No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
l No DTCs P1825 or P1915.
l Ignition voltage is between 11-15 volts.
l The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

Conditions for Setting the DTC

P0872

The TCM detects that the TFP switch 3 signal voltage remains low, 0 volts when the 2-6 clutch is commanded
ON for 5 seconds.

P0873

The TCM detects that the TFP switch 3 signal voltage is high, 12 volts when the 2-6 clutch is commanded OFF.

Action Taken When the DTC Sets

l DTCs P0872 and P0873 are Type C DTCs.

l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0872 and P0873 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

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DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

If there are any other transmission related DTCs set, diagnose those DTCs first.

Circuit/System Testing

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and place the transmission range selector in D6.
3. Observe the TFP Switch 3 parameter while commanding 1st gear and then commanding 2nd gear with the
scan tool. The TFP Switch 3 should transition from Low in 1st gear to High in 2nd gear.
¡ If the TFP Switch 3 parameter state does not change, perform the Control Solenoid Valve and
Transmission Control Module Assembly Inspection.
¡ If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0877 OR P0878

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

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DTC Descriptors

DTC P0877

Transmission Fluid Pressure (TFP) Switch 4 Circuit Low Voltage

DTC P0878

Transmission Fluid Pressure (TFP) Switch 4 Circuit High Voltage

Diagnostic Fault Information

DTC P0877 or P0878

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
TFP Switch 1 Signal P0842 P0843 P0843 -
TFP Switch 3 Signal P0872 P0873 P0873 -
TFP Switch 4 Signal P0877 P0878 P0878 -
TFP Switch 5 Signal P0989 P0990 P0990 -

Typical Scan Tool Data

TFP Switches
Open/High
Circuit Short to Ground Resistance Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: 12 Volts = Hi, 0 Volts = Low
TFP Switch 1 Low Hi Hi
TFP Switch 3 Low Hi Hi
TFP Switch 4 Low Hi Hi
TFP Switch 5 Low Hi Hi

Circuit/System Description

The transmission fluid pressure (TFP) switch 4 is part of the control solenoid (w/body and TCM) valve
assembly and is not serviced separately. The TCM supplies 12 volts to the TFP switch 4 on the TFP switch 4
signal circuit; the TFP switch 4 has an internal case ground. TFP switch 4 is normally closed, Low. When oil
pressure is present at the TFP switch 4, the switch is open, high. The normally low clutch pressure control (PC)
solenoid 4 controls the transmission fluid to the 1-2-3-4 clutch. The TCM monitors the normally closed TFP
switch 4 signal circuit to determine the 1-2-3-4 clutch status.

Conditions for Running the DTC

l No DTCs P0120, P0711, P0712, or P0713.

l No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
l No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
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l No DTCs P1825 or P1915.

l Ignition voltage is between 11-15 volts.
l The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

Conditions for Setting the DTC

P0877

The TCM detects that the TFP switch 4 signal voltage remains low, 0 volts when the 1-2-3-4 clutch is
commanded ON for 5 seconds.

P0878

The TCM detects that the TFP switch 4 signal voltage is high, 12 volts when the 1-2-3-4 clutch is commanded
OFF.

Action Taken When the DTC Sets

l DTCs P0877 and P0878 are Type C DTCs.

l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0877 and P0878 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs

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 2006 Cadillac XLR
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l Testing for Intermittent Conditions and Poor Connections

l Wiring Repairs

Circuit/System Verification

If there are any other transmission related DTCs set, diagnose those DTCs first.

Circuit/System Testing

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and place the transmission range selector in D6.
3. Observe the TFP switch 4 parameter while commanding 4th gear and then commanding 5th gear with the
scan tool. The TFP Switch 4 should transition from High in 4th gear to Low in 5th gear.
¡ If the TFP switch 4 parameter state does not change, perform the Control Solenoid Valve and
Transmission Control Module Assembly Inspection.
¡ If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0961, P0962 OR P0963

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0961

Line Pressure Control (PC) Solenoid System Performance

DTC P0962

Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

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DTC P0963

Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

DTC P0961, P0962 or P0963

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Line PC Solenoid Control P0962 P0963 P0963 P0961
Line PC Solenoid High Side Driver 2 P1833 P1833 P1834 P0961

Typical Scan Tool Data

Line PC Solenoid
Circuit Short to Ground Open Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: OK
Line PC Sol. CKT Status Short to GND Open/Short to Volts Open/Short to Volts
High Side Driver 2 CKT Status Open/Short to GND Open/Short to GND Short to Volts

Circuit/System Description

The line pressure control (PC) solenoid is part of the control solenoid (w/body and TCM) valve assembly and is
not serviced separately. The line PC solenoid regulates the transmission fluid line pressure. The TCM varies the
current to the normally high line PC solenoid valve from 0.1 amp for maximum line pressure, to 1.1 amps for
minimum line pressure. This is accomplished by varying the desired line pressure in kPa (psi).

Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The line PC solenoid is commanded ON or OFF.

P0961

DTC P0961 is not failed this ignition.

P0962

DTC P0962 is not failed this ignition.

P0963

DTC P0963 is not failed this ignition.

Conditions for Setting the DTC

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P0961

The TCM detects an internal electrical performance malfunction of the line PC solenoid control circuit and the
actual line pressure does not equal the commanded line pressure for 300 milliseconds.

P0962

The TCM detects an internal low voltage electrical malfunction of the line PC solenoid control circuit for 300
milliseconds.

P0963

The TCM detects an internal high voltage electrical malfunction of the line PC solenoid control circuit for 300
milliseconds.

Action Taken When the DTC Sets

P0962

l DTC P0962 is a Type A DTC.

l The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the
current gear if 4th, 5th, or 6th gear.
l The TCM inhibits the torque converter clutch (TCC).
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

P0961 or P0963

l DTCs P0961 and P0963 are Type C DTCs.

l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

l DTCs P0961 and P0963 are Type C DTCs.

l DTC P0962 is a Type A DTC.

Diagnostic Aids

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long
enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the
optimal conditions to test DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Circuit/System Testing

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then
operate the vehicle in Park for 5 seconds.
3. Observe the scan tool data parameter Line PC Sol. CKT Status, the parameter should display OK.
¡ If the parameter displays Open, Short to Volts, Short to GND or if the DTC resets, perform the
Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If no concerns are found during the inspection, replace the control solenoid (w/body and TCM)
valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0965, P0966 OR P0967

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 2006 Cadillac XLR
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Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0965

Clutch Pressure Control (PC) Solenoid 2 System Performance

DTC P0966

Clutch Pressure Control (PC) Solenoid 2 Control Circuit Low Voltage

DTC P0967

Clutch Pressure Control (PC) Solenoid 2 Control Circuit High Voltage

Diagnostic Fault Information

DTC P0965, P0966 or P0967

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Clutch PC Solenoid 2 Control P0966 P0977 P0977 P0965
Clutch PC Solenoid 2 High Side
P1833 P1833 P1834 P0965
Driver 2

Typical Scan Tool Data

Clutch PC Solenoid 2
Short to Short to
Circuit Normal Range Ground Open Voltage
Operating Conditions: Key ON, Engine OFF or Engine running, normal operating temperature
Open/Short to Open/Short to
Clutch PC 2 Sol. CKT Status OK Short to GND
Volts Volts
Open/Short to Open/Short to
High Side Driver 2 CKT Status OK Short to Volts
GND GND

Circuit/System Description

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The transmission control module (TCM) supplies 12 volts to the clutch PC
solenoid 2 on the high side driver 2 circuit. The TCM control the PC solenoid 2 through the clutch PC solenoid
2 control circuit. The normally high clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF

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and exhausts fluid when commanded ON. The clutch PC 2 regulates the transmission fluid pressure to the 3-5-R
clutch.

Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The clutch PC solenoid 2 is commanded ON.

Conditions for Setting the DTC

P0965

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid control circuit and
the actual 3-5-R clutch pressure does not equal the commanded 3-5-R clutch pressure for 300 milliseconds.

P0966

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid control circuit for 300
milliseconds.

P0967

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid control circuit for
300 milliseconds.

Action Taken When the DTC Sets

l DTCs P0965, P0966, and P0967 are Type A DTCs. Refer to Diagnostic Trouble Code (DTC) Type
Definitions and Diagnostic Trouble Code (DTC) List/Type.
l The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based
on the fault detected.
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0965, P0966, and P0967 are Type A DTCs. Refer to Diagnostic Trouble Code (DTC) Type
Definitions and Diagnostic Trouble Code (DTC) List/Type.

Diagnostic Aids

When attempting to set DTCs, it may be helpful to ensure the TCM is warmed up and the transmission is
operated in second gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the
TCM under the optimal conditions to test DTCs.

Reference Information

Schematic Reference

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Data List

l Scan Tool Data Definitions
l Scan Tool Output Controls

Circuit/System Verification

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the
optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate
temperature and then operate the vehicle in third gear for 5 seconds.

Component Testing

The scan tool data parameter Clutch PC 2 Sol. CKT Status normally displays OK.

If the parameter displays Open/Short to Volts, Short to GND or if the DTC resets, perform the Control
Solenoid Valve and Transmission Control Module Assembly Inspection and if no concerns are found
replace the control solenoid (w/body and TCM) valve assembly.

Repair Procedures

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0969, P0970 OR P0971

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0969

Clutch Pressure Control (PC) Solenoid 3 System Performance

DTC P0970

Clutch Pressure Control (PC) Solenoid 3 Control Circuit Low Voltage

DTC P0971

Clutch Pressure Control (PC) Solenoid 3 Control Circuit High Voltage

Diagnostic Fault Information

DTC P0969, P0970 or P0971

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Clutch PC Solenoid 3 Control P0970 P0971 P0971 P0969
Clutch PC Solenoid 3 High Side
P1833 P1833 P1834 P0969
Driver 2

Typical Scan Tool Data

Clutch PC Solenoid 3
Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Open/Short to Open/Short to
Clutch PC 3 Sol. CKT Status OK Short to GND
Volts Volts
Open/Short to Open/Short to
High Side Driver 2 CKT Status OK Short to Volts
GND GND

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Circuit/System Description

The clutch pressure control (PC) solenoid 3 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 3 on the high side driver 2
circuit. The TCM control the clutch PC solenoid 3 through the clutch PC solenoid 3 control circuit. The
normally high clutch PC solenoid 3 flows fluid to the low and reverse clutch and the 4-5-6 clutch. The clutch
PC solenoid 3 regulates the transmission fluid pressure to the low and reverse clutch and 4-5-6 clutch
assemblies.

Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The clutch PC solenoid 3 is commanded ON.

Conditions for Setting the DTC

P0969

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid control circuit and
the actual low and reverse/4-5-6 clutch pressure does not equal the commanded low and reverse/4-5-6 clutch
pressure for 300 milliseconds.

P0970

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid control circuit for 300
milliseconds.

P0971

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid control circuit for
300 milliseconds.

Action Taken When the DTC Sets

l DTCs P0969, P0970, and P0971 are Type A DTCs.

l The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based
on the default detected.
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0969, P0970, and P0971 are Type A DTCs.

Diagnostic Aids

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in second gear
long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the

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 2006 Cadillac XLR
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optimal conditions to test DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit Verification

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the
optimal conditions to test solenoid electrical DTCs.

l Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

l Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate
temperature and then operate the vehicle in fourth gear for 5 seconds.

Component Testing

The scan tool data parameter Clutch PC 3 Sol. CKT Status normally displays OK.

¡ If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the Control
Solenoid Valve and Transmission Control Module Assembly Inspection and if no concerns are found,
replace the control solenoid (w/body and TCM) valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0973 OR P0974

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0973

Shift Solenoid (SS) 1 Control Circuit Low Voltage

DTC P0974

Shift Solenoid (SS) 1 Control Circuit High Voltage

Diagnostic Fault Information

DTC P0973 or P0974

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Shift Solenoid (SS) 1 Control P0973 P0974 P0974 -
Shift Solenoid (SS) 1 High Side
P1833 P1833 P1834 -
Driver 2

Typical Scan Tool Data

Shift Solenoid (SS) 1

Open/High
Circuit Short to Ground Resistance Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: OK
Shift Sol. 1 CKT Status Short to GND Open Short to Volts
High Side Driver 2 CKT Status Open/Short to GND Open/Short to GND Short to Volts

Circuit/System Description

The shift solenoid (SS) 1 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced
separately. The control solenoid (w/body and TCM) valve assembly supplies 12 volts to SS 1 on the high side
driver 2 circuit. The control solenoid (w/body and TCM) valve assembly controls the normally closed SS 1 on
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the SS 1 control circuit. The SS 1 controls the transmission fluid to the Mode-2 valve. In the OFF position no
oil is supplied to the clutch pressure control (PC) solenoid 3 or the transmission fluid pressure (TFP) switch 5,
and the 4-5-6 clutch is fed by drive fluid. In the ON position, Reverse fluid is allowed to flow and is supplied to
the 3-5-R clutch.

Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The SS 1 is commanded ON or OFF.

Conditions for Setting the DTC

P0973

The control solenoid (w/body and TCM) valve assembly detects an internal low voltage electrical malfunction
of the SS 1 control circuit when the SS 1 is commanded OFF for 300 milliseconds.

P0974

The control solenoid (w/body and TCM) valve assembly detects an internal high voltage electrical malfunction
of the SS 1 control circuit when the SS 1 is commanded ON for 300 milliseconds.

Action Taken When the DTC Sets

l DTCs P0973 and P0974 are Type A DTCs.

l The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the
current gear is 4th, 5th, or 6th gear.
l The TCM inhibits the torque converter clutch (TCC).
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P0973 and P0974 are Type A DTCs.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the control solenoid (w/body and TCM) valve
assembly is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase
in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Circuit/System Testing

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature.
3. Place the gear selector in Reverse for 5 seconds and then idle vehicle for 5 seconds.
4. Observe the scan tool data parameter Shift Sol. 1 CKT Status. The parameter should display OK.
¡ If the parameter displays Open, Short to Volts, Short to GND, or if the DTC resets, perform the
Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If no concerns are found during the inspection, replace the control solenoid (w/body and TCM)
valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts.

DTC P0976 OR P0977

Diagnostic Instructions

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0976

Shift Solenoid (SS) 2 Control Circuit Low Voltage

DTC P0977

Shift Solenoid (SS) 2 Control Circuit High Voltage

Diagnostic Fault Information

DTC P0976 or P0977

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Shift Solenoid (SS) 2 Control P0976 P0977 P0977 -
Shift Solenoid (SS) 2 High Side
P1833 P1833 P1834 -
Driver 2

Typical Scan Tool Data

Shift Solenoid (SS) 2

Open/High
Circuit Short to Ground Resistance Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: OK
Shift Sol. 2 CKT Status Short to GND Open Short to Volts
High Side Driver 2 CKT Status Open/Short to GND Open/Short to GND Short to Volts

Shift Solenoid (SS) 2

Scan Data -
Scan Data -
Normal Circuit
Circuit
Circuit Scan Data - Shorted to
Grounded
Circuit Voltage Circuit Open Voltage
Shift Sol. 2 CKT Status OK Open Short to GND Short to Volts
Open/Short to Open/Short to
High Side Driver 2 CKT Status OK Short to Volts
GND GND

Circuit/System Description

The shift solenoid (SS) 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced

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separately. The TCM supplies 12 volts to SS 2 on the high side driver 2 circuit. The TCM controls the normally
closed SS 2 on the SS 2 control circuit. The SS 2 controls the transmission fluid to the Mode-3 valve. In the ON
position the 4-5-6 clutch is fed by drive fluid. In the OFF position, Reverse fluid is allowed to flow and is
supplied to the low and reverse clutch and the 4-5-6 clutch assemblies.

Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The SS 2 is commanded ON or OFF.

Conditions for Setting the DTC

P0976

The TCM detects an internal low voltage electrical malfunction of the SS 2 control circuit when the SS 2 is
commanded OFF for 300 milliseconds.

P0977

The TCM detects an internal high voltage electrical malfunction of the SS 2 control circuit when the SS 2 is
commanded ON for 300 milliseconds.

Action Taken When the DTC Sets

l DTCs P0976 and P0977 are Type A DTCs.

l The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the
current gear is 4th, 5th, or 6th gear.
l The TCM inhibits the torque converter clutch (TCC).
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P0976 and P0977 are Type A DTCs.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is
operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place
the TCM under the optimal conditions to test solenoid electrical DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Circuit/System Testing

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in 4th, 5th, or 6th gear with TCC applied, long enough to ensure at least a 3°C (5°F)
rise in TCM substrate temperature.
3. Observe the scan tool data parameter Shift Sol. 2 CKT Status. The parameter should display OK.
¡ If the parameter displays Open, Short to Volts, Short to GND, or if the DTC resets, perform the
Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If no concerns are found during the inspection, replace the control solenoid (w/body and TCM)
valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P0989 OR P0990

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Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0989

Transmission Fluid Pressure (TFP) Switch 5 Circuit Low Voltage

DTC P0990

Transmission Fluid Pressure (TFP) Switch 5 Circuit High Voltage

Diagnostic Fault Information

DTC P0989 or P0990

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
TFP Switch 1 Signal P0842 P0843 P0843 -
TFP Switch 3 Signal P0872 P0873 P0873 -
TFP Switch 4 Signal P0877 P0878 P0878 -
TFP Switch 5 Signal P0989 P0990 P0990 -

Typical Scan Tool Data

TFP Switches
Open/High
Circuit Short to Ground Resistance Short to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: 12 Volts = Hi, 0 Volts = Low
TFP Switch 1 Low Hi Hi
TFP Switch 3 Low Hi Hi
TFP Switch 4 Low Hi Hi
TFP Switch 5 Low Hi Hi

Circuit/System Description

The transmission fluid pressure (TFP) switch 5 is part of the control solenoid (w/body and TCM) valve
assembly and is not serviced separately. The TCM supplies 12 volts to the TFP switch 5 on the TFP switch 5
signal circuit; the TFP switch 5 has an internal case ground. TFP switch 5 is normally closed, Low. When oil
pressure is present at the TFP switch 5, the switch is open, high. The normally low clutch pressure control (PC)
solenoid 4 controls the transmission fluid to the 1-2-3-4 clutch. The TCM monitors the normally closed TFP
switch 5 signal circuit to determine the 1-2-3-4 clutch status.
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Conditions for Running the DTC

l No DTCs P0120, P0711, P0712, or P0713.

l No DTCs P0965, P0966, P0967, P0968, P0969, P0970, or P0971.
l No DTCs P0973, P0974, P0976, P0977, P2719, P2720, P2728, P2729, or P2730.
l No DTCs P1825 or P1915.
l Ignition voltage is between 11-15 volts.
l The transmission fluid temperature (TFT) is 20-150°C (68-302°F).

Conditions for Setting the DTC

P0989

The TCM detects that the TFP Switch 5 signal voltage remains low, 0 volts when the low and reverse clutch or
the 4-5-6 clutch is commanded ON for 5 seconds.

P0990

the TCM detects that the TFP Switch 5 signal voltage is high, 12 volts when the low and reverse clutch or the 4-
5-6 clutch is commanded OFF.

Action Taken When the DTC Sets

l DTCs P0989 and P0990 are Type C DTCs.

l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P0989 and P0990 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

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Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

If there are any other transmission related DTCs set, diagnose those DTCs first.

Circuit/System Testing

1. Ensure the TFT is near the temperature displayed in the Failure Records.
2. Start the engine and place the transmission range selector in D6.
3. Observe the TFP Switch 5 parameter while commanding 1st gear and then commanding 2nd gear with the
scan tool. The TFP switch 5 should transition from low in 1st gear to high in 2nd gear.
¡ If the TFP Switch 5 parameter state does not change, perform the Control Solenoid Valve and
Transmission Control Module Assembly Inspection.
¡ If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P1684, P1685 OR P1686

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P1684

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Transmission Control Module (TCM) Power Up Temperature Sensor Performance

DTC P1685

Transmission Control Module (TCM) Power Up Temperature Sensor Circuit Low Voltage

DTC P1686

Transmission Control Module (TCM) Power Up Temperature Sensor Circuit High Voltage

Circuit/System Description

The transmission control module (TCM) power up temperature sensor is located inside of the control solenoid
(w/body and TCM) valve assembly and is not serviced separately. The TCM power up temperature sensor
provides the temperature of the TCM at TCM power up. This temperature reading is used in various shifting
and diagnostic routines in the TCM software. This fault is handled inside the TCM and no external circuits are
involved.

Conditions for Running the DTC

The engine speed is greater than 450 RPM.

P1684

l No DTCs P0711, P0712, P0713, P0716, P0717, P0722, P0723, or P1684.

l DTC P1684 has not passed this key ON.
l The TCM power up temperature is between -39 and +149°C (-38 and +300°F).

P1685

l No DTCs P0716, P0717, P0722, or P0723.

l The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
l The torque converter clutch (TCC) slip speed is equal to or greater than 120 RPM for 200 seconds or
greater.
l DTC P1685 has not failed this ignition cycle.

P1685

DTC P1686 has not failed this ignition cycle.

Conditions for Setting the DTC

P1684

Fail Case 1

l Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.

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l TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
l The TCM power up temperature is between -40 and +21°C (-40 and +70°F).
l The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
l The transmission fluid temperature (TFT) is greater than 70°C (158°F).
l The TFT has increased by 55°C (99°F) since startup.

Fail Case 2

l Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
l TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
l The TCM temperature sensor is between 120-150°C (248-302°F).
l The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
l The TFT is greater than 70°C (158°F).
l The TFT has increased by 55°C (99°F) since startup.

Fail Case 3

The TCM power up temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

P1685

The TCM power up temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

P1686

The TCM power up temperature is greater than or equal to 161°C (321°F) for greater than 10 seconds.

Action Taken When the DTC Sets

l DTCs P1684, P1685, and P1686 are Type C DTCs.

l The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTCs P1684, P1685, and P1686 are Type C DTCs.

Diagnostic Aids

Reprogram the TCM and retest the DTC to see if the DTC resets.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Testing

1. Clear the DTC and operate the vehicle under the Conditions for Running the DTC and the Conditions for
Setting the DTC.
2. Shut the ignition OFF for 30 seconds, and then verify that the DTC does not reset.
¡ If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P1751

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

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 2006 Cadillac XLR
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DTC Descriptor

DTC P1751

Shift Valve 1 Performance

Circuit/System Description

The shift valve 1 (clutch select valve 2) is part of the lower control valve body. The shift valve 1 (clutch select
valve 2) controls fluid to the R1 and 4-5-6 clutches. During this diagnostic test, intrusive actions are taken by
the transmission control module (TCM) to test the clutch select valve 2 to see if the valve is stuck. The TCM
commands the shift solenoid (SS) 1 ON to put pressure on the valve towards the spring and at the same time,
elevates line pressure slightly to assist the spring side pressure. If the spring is broken, the valve will slip back
towards the spring indicating a mechanical failure and the DTC will set.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTCs P0722 or P0723.
l No DTCs P2763, or P2764.
l No DTCs P0741 or P0742.
l The engine run time is greater than 5 seconds.
l The transmission fluid temperature (TFT) is 20-130°C (68-266°F).
l The calculated throttle position is between 8-90 percent.
l The engine torque is greater than 50 N.m (36 lb ft).
l No upshift or downshift in process.
l DTC P0742 has not passed or failed for this torque converter clutch (TCC) cycle.
l The attained gear slip is equal to or greater than 70 RPM.

Conditions for Setting the DTC

The TCM detects attained gear slip greater than 75 RPM for 0.5 seconds.

Action Taken When the DTC Sets

DTC P1751 is a Type B DTC.

Conditions for Clearing the DTC

DTC P1751 is a Type B DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

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Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Verification

Operate the vehicle in drive with the calculated throttle position greater than 8 percent and ensure the TCC is
commanded ON and OFF a minimum of 5 times.

¡ If the DTC resets, go to Component Testing.

Component Testing

Inspect the lower control valve body for a stuck clutch select valve 2, a broken clutch select valve 2 spring,
debris or damage.

¡ If you found a valve body concern, repair or replace the lower control valve body as necessary.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control valve body. Refer to Control Valve Lower Body and Upper Body Replacement.
2. Perform the Service Fast Learn Adapts.

DTC P1825 OR P1915

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P1825

Internal Mode Switch - Invalid Range

DTC P1915

Internal Mode Switch Start/Wrong Range

Diagnostic Fault Information

DTC P1825 or P1915

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Transmission Range Signal A P1825 P1915 P1915 P1825, P1915
Transmission Range Signal B P1915 P1825 P1825 P1825, P1915
Transmission Range Signal C P1915 P1825 P1825 P1825, P1915
Transmission Range Signal P P1825 P1915 P1915 P1825, P1915
Ground - P1825 P1825 P1825, P1915

Typical Scan Tool Data

IMS A/B/C/P
Short to Short to
Circuit Normal Range Ground Open Voltage
Operating Conditions: Ignition ON, range selector in Park
Transmission Range Switch Signal A LOW LOW HI HI
Transmission Range Switch Signal B HI LOW HI HI
Transmission Range Switch Signal C HI LOW HI HI
Transmission Range Switch Signal P LOW LOW HI HI
HI = 12 volts
LOW = 0 volts

Circuit/System Description

The internal mode switch (IMS) assembly is a sliding contact switch attached to the control valve body within
the transmission. The 4 inputs to the transmission control module (TCM) from the switch indicate which
position is selected by the transmission manual shaft. The input voltage at the TCM is high when the switch is

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open and low when the switch is closed to ground. The state of each input is displayed on the scan tool as IMS.
The IMS input parameters represented are transmission range signal A, Signal B, signal C, and signal P.

Conditions for Running the DTC

No OSS DTCs P0722 or P0723.

P1825

Vehicle speed sensor (VSS) is greater than 16 km/h (10 mph)

P1915

The transmission output shaft speed is less than 90 RPM.

Conditions for Setting the DTC

P1825

Any one or more of the following conditions:

l The IMS signal circuit A, B, or P are Low in Park for greater than 1 second.
l The IMS signal circuit A is Low in D6 for 8 seconds.
l The IMS signal circuit C is High in D6 for 8 seconds.
l The TCM detects an invalid range from the IMS for 3.25 seconds.
l The IMS signal circuit C is high in D6 for greater than 8 seconds and the engine torque is greater than 20
N.m (15 lb ft).
l Park/Neutral Switch equals P/N and the IMS state is not Park or Neutral, or the Park/Neutral switch is not
Park or Neutral and the IMS state equals Park or Neutral for 4 seconds.

P1915

The manual shift shaft switch assembly indicates a transitional state during the following sequence:

l The engine speed is less than 50 RPM for more than 0.25 seconds.
l The engine speed is 50-480 RPM for more than 0.07 seconds.
l The engine speed is greater than 525 RPM for more than 3.25 seconds.
l The transmission input shaft speed is greater than 250 RPM.

Action Taken When the DTC Sets

l DTCs P1825 and P1915 are Type A DTCs.

l The TCM commands maximum line pressure.
l The TCM turns OFF all solenoids.
l The TCM freezes transmission adaptive functions.

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l The TCM defaults the transmission to third gear if the current gear is 1st, 2nd, or 3rd; or fifth gear if the
current gear is 4th, 5th, or 6th gear.

Conditions for Clearing the DTC

DTCs P1825 and P1915 are Type A DTCs.

Diagnostic Aids

l The IMS is part of a wire harness, which connects electrically to the control solenoid (w/body and TCM)
valve assembly and is serviced separately from the control solenoid (w/body and TCM) valve assembly.
Inspect the IMS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for
metallic debris. Use the J 35616 GM-approved terminal test kit for any test that requires probing the
control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
See Special Tools.
l Inspect for a incorrectly adjusted range selector lever cable. Refer to Range Selector Lever Cable
Adjustment.
l Inspect the manual shaft detent assembly for proper alignment with the manual shaft detent lever. The
manual shaft detent roller must be centered over the detent lever and not contact the IMS actuator arm.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

J 35616 GM-Approved Terminal Test Kit. See Special Tools.

Circuit/System Verification

Test for the correct operation of the IMS. Refer to Transmission Internal Mode Switch Logic.

¡ If the IMS operation matches the IMS logic table, the system is functioning normally.

Circuit/System Testing

1. Disconnect the IMS connector at the control solenoid (w/body and TCM) valve assembly. Ignition ON.
The scan tool IMS A/B/C/P parameter should display HI for all four signal circuits.
¡ If a signal circuit displays LOW, the control solenoid (w/body and TCM) valve assembly is faulty.

2. Connect a 3-amp fused jumper wire between each transmission range signal circuit at the control solenoid
(w/body and TCM) valve assembly and ground ensuring that the signal circuit displays LOW when
connected to ground.
¡ If a signal circuit remains HI when connected to ground, the control solenoid (w/body and TCM)
valve assembly is faulty.
¡ If the above two tests indicate correct TCM functions, the IMS is faulty.

Component Testing

Internal Mode Switch (IMS) Logic Table

Gear Selector Position A B C P
Park LOW HI HI LOW
Park/Reverse LOW LOW HI LOW
Reverse LOW LOW HI HI
Reverse/Neutral HI LOW HI HI
Neutral HI LOW HI LOW
Neutral/Drive 6 HI LOW LOW LOW
Drive 6 HI LOW LOW HI
Drive 4 LOW LOW LOW LOW
Drive 3 LOW HI LOW HI
Drive 2 HI HI LOW LOW
HI HI HI HI
Invalid LOW HI HI HI
HI HI HI LOW

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HI = Ignition voltage
LOW = 0 voltage

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

IMPORTANT: Perform the Control Solenoid Valve and Transmission Control Module
Assembly Inspection for the following components before replacing the
components.

l Internal Mode Switch (IMS) Replacement. Refer to Manual Shift Shaft Position Switch Replacement.
l Control Solenoid (w/Body and TCM) Valve Assembly Replacement. Refer to Control Module
References for replacement, setup, and programming.
l Perform the Service Fast Learn Adapts.

DTC P1831 OR P1832

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P1831

Pressure Control (PC)/Shift Lock Solenoid Control Circuit Low Voltage

DTC P1832

Pressure Control (PC)/Shift Lock Solenoid Control Circuit High Voltage

Circuit/System Description

The transmission control module (TCM) high side driver 2 is located inside of the control solenoid (w/body and
TCM) valve assembly and is not serviced separately. The high side driver 2 provides the voltage for the TCM
pressure control solenoids and shift solenoids. This fault is handled inside the TCM and no external circuits are
involved.

Conditions for Running the DTC

P1831

l The engine speed is greater than 500 RPM.

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l Ignition voltage is between 8-18 volts.

l High side driver 2 is enabled.
l DTC P1831 has not failed this ignition.

P1832

DTC P1832 has not failed this ignition.

Conditions for Setting the DTC

P1831

The TCM detects an internal open or short to ground in the high side driver 2 for 3 out of 5 seconds.

P1832

The TCM detects an internal short to voltage on the high side driver 2 circuit for 3 out of 5 seconds.

Action Taken When the DTC Sets

P1831

l DTC P1831 is a Type A DTC.

l The TCM turns OFF all high side drivers.
l The TCM turns OFF all solenoids.
l The TCM commands maximum line pressure.
l the TCM freezes transmission adaptive functions.
l The TCM commands the TCC OFF.
l The TCM allows the vehicle to operate in transmission protection mode.

P1832

DTC P1832 is a Type C DTC.

Conditions for Clearing the DTC

l DTC P1831 is a Type A DTC.

l DTC P1832 is a Type C DTC.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

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l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Testing

1. Clear the DTC and operate the vehicle under the conditions for running and setting the DTC.
2. Observe the High Side Driver CKT Status parameter. The parameter should display OK.
¡ If the parameter displays Open, Short to Ground, Short to Voltage, or the DTC resets, replace the
control solenoid (w/body and TCM) valve assembly. Refer to Control Module References for
replacement, setup, and programming.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P2534

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P2534

Ignition 1 Switch Circuit Low Voltage

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Circuit/System Description

The transmission control module (TCM) samples the system voltage on the Ignition 1 voltage circuit every 0.1
seconds. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly.
Improper solenoid operation may cause erratic transmission operation, which may result in internal damage.

Conditions for Running the DTC

l The engine speed is greater than 500 RPM.

l Ignition voltage is between 8-18 volts.

Conditions for Setting the DTC

The TCM detects 2 volts or less on the ignition 1 voltage circuit at the TCM for 10 seconds or more.

Action Taken When the DTC Sets

l DTC P2534 is a Type A DTC.

l The TCM turns OFF all high side drivers.
l The TCM turns OFF all solenoids.
l The TCM commands maximum line pressure.
l the TCM freezes transmission adaptive functions.
l The TCM commands the TCC OFF.
l The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTC P2534 is a Type A DTC.

Diagnostic Aids

l If all circuit tests are OK, ensure the transmission pass through connector and harness terminals are clean
and not damaged, and the charging system is functioning correctly.
l Verify there is a good connection at the body control module (BCM) especially if DTC P0700 is also set
with this code.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views

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l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit/System Testing

Clear the DTC and operate the vehicle under the conditions for running and setting the DTC.

¡ If the DTC resets, test the TCM ignition 1 voltage circuit for battery positive voltage at the TCM 16-way
connector.
¡ If the voltage is less than battery voltage, test the Ignition 1 voltage circuit for an open or short to ground
and repair the circuit as necessary.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts.

DTC P2714 OR P2715

DTC Descriptors

DTC P2714

Clutch Pressure Control (PC) Solenoid 4 - Stuck Off

DTC P2715

Clutch Pressure Control (PC) Solenoid 4 - Stuck On

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

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The clutch pressure control (PC) solenoid 4 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The clutch PC solenoid 4 flows fluid to the 2-6 clutch when commanded ON and
exhausts fluid when commanded OFF. The clutch PC solenoid 4 regulates the transmission fluid pressure to the
2-6 clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed sensor
(ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated
gear ratio for each commanded gear.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTCs P0722 or P0723.
l No DTCs P1825 or P1915.

DTC P2714

l The transmission input shaft speed is greater than 60 RPM.

l 2-6 clutch is commanded ON.

DTC P2715

l The transmission output shaft speed is greater than 200 RPM.

l 2-6 clutch is commanded OFF.

Conditions for Setting the DTC

DTC P2714

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 2-6 clutch is commanded ON for
0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the anticipated input shaft
speed.

DTC P2715

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 2-6 clutch is commanded OFF for
0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

Action Taken When the DTC Sets

l DTCs P2714 and P2715 are Type A DTCs.

l The TCM commands maximum line pressure.
l The TCM inhibits TCC.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P2714 and P2715 are Type A DTCs.

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Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

l DT-47825 Control Solenoid Test Plate. See Special Tools.

l DT-47825-10 Jumper Harness. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Turn ON the ignition, with the engine OFF.

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IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Freeze
Frame and Failure Records.

3. Record the DTC Freeze Frame and Failure Records.

4. Clear the DTC.
5. Operate the vehicle in drive with the calculated throttle position greater than 15% to obtain 72 km/h (45
mph) and achieve 5th gear. Perform this maneuver 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check.

¡ If the pressure is out of specification, correct this concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and
TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris.
¡ If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Inspect the 2-6 clutch assembly for damage.

¡ If a concern is found in the 2-6 clutch assembly, repair or replace as necessary.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

PC Sol 4 Operation
Operating Conditions Normal Operation Stuck OFF Stuck ON
Steady State Gears 2, 6 2, 6 Neutral 2, 6
Steady State Gears 1, 3, 4, 5 1, 3, 4, 5 1, 3, 4, 5 2, 6
Garage Shift Park/Neutral to Reverse/Drive Drive Gear Drive Gear
Downshift from gears 3, 4, 5
2 Neutral 2, 6
to 2
Upshift from gears 2 to 3, 4, 5 3, 4, 5 3, 4, 5 2, 6

Repair Procedures

l Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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Control valve body replacement. Refer to Control Valve Lower Body and Upper Body Replacement.

l 2-6 clutch assembly repair or replace. Refer to 2-6 Clutch Overhaul (6L80) in the Transmission Unit
Repair Manual.
l Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
l Perform the Service Fast Learn Adapts.

DTC P2719, P2720 OR P2721

Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P2719

Clutch Pressure Control (PC) Solenoid 4 System Performance

DTC P2720

Clutch Pressure Control (PC) Solenoid 4 Control Circuit Low Voltage

DTC P2721

Clutch Pressure Control (PC) Solenoid 4 Control Circuit High Voltage

Diagnostic Fault Information

DTC P2719, P2720 or P2721

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Clutch PC Solenoid 4 Control P2720 P2721 P2721 P2719
Clutch PC Solenoid 4 High Side
P1833 P1833 P1834 P2719
Driver 2

Typical Scan Tool Data

Clutch PC Solenoid 4 Scan Tool Data

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Open/Short to Open/Short to
Clutch PC 4 Sol. CKT Status OK Short to GND
Volts Volts

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Open/Short to Open/Short to
High Side Driver 2 CKT Status OK Short to Volts
GND GND

Circuit/System Description

The clutch pressure control (PC) solenoid 4 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 4 through the high side
driver 2 circuit. The TCM control the clutch PC solenoid 4 through the clutch PC solenoid 4 control circuit. The
normally low clutch PC solenoid 4 flows fluid to the 2-6 clutch when commanded ON and exhausts fluid when
commanded OFF. The clutch PC solenoid 4 regulates the transmission fluid pressure to the 2-6 clutch.

Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The clutch PC solenoid 4 is commanded ON or OFF.

Conditions for Setting the DTC

P2719

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 4 control circuit and
the actual 2-6 clutch pressure does not equal the commanded 2-6 clutch pressure for 300 milliseconds.

P2720

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 4 control circuit for
300 milliseconds.

P2721

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 4 control circuit for
300 milliseconds.

Action Taken When the DTC Sets

l DTCs P2719, P2720, and P2721 are Type A DTCs.

l The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based
on the default detected.
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P2719, P2720, and P2721 are Type A DTCs.

Diagnostic Aids

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When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in second gear
long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the
optimal conditions to test DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit Verification

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the
optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate
temperature.

Component Testing

The scan tool data parameter Clutch PC 4 Sol. CKT Status normally displays OK.

¡ If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the Control
Solenoid Valve and Transmission Control Module Assembly Inspection and if no concerns are found,
replace the control solenoid (w/body and TCM) valve assembly.

Repair Procedures

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Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P2723 OR P2724

DTC Descriptors

DTC P2723

Clutch Pressure Control (PC) Solenoid 5 - Stuck Off

DTC P2724

Clutch Pressure Control (PC) Solenoid 5 - Stuck On

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The clutch PC solenoid 5 flows fluid to the 1-2-3-4 clutch when commanded ON
and exhausts fluid when commanded OFF. The clutch PC solenoid 5 regulates the transmission fluid pressure to
the 1-2-3-4 clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed
sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a
calculated gear ratio for each commanded gear.

Conditions for Running the DTC

l No DTCs P0716 or P0717.

l No DTCs P0722 or P0723.
l No DTCs P1825 or P1915.

DTC P2723

l The transmission input shaft speed is greater than 60 RPM.

l 1-2-3-4 clutch is commanded ON.

DTC P2724

l The transmission output shaft speed is greater than 200 RPM.

l 1-2-3-4 clutch is commanded OFF.

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Conditions for Setting the DTC

DTC P2723

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 1-2-3-4 clutch is commanded ON
for 0.5 seconds and either fail case below is achieved:

Fail Case 1

l Output shaft speed is greater than 60 RPM.

l The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

Fail Case 2

l Output shaft speed is less than 60 RPM.

l The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

DTC P2724

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 1-2-3-4 clutch is commanded OFF
for 0.2 seconds and the following is achieved:

l The 1-2-3-4 clutch commanded pressure is 0 kPa for a calculated amount of time.
l The transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.
l The output shaft speed is greater than 60 RPM.

Action Taken When the DTC Sets

l DTCs P2723 and P2724 are Type A DTCs.

l The TCM freezes transmission adaptive functions.
l DTC P2723 defaults to Reverse, Park, Neutral, 5th, or 6th gear.
l DTC P2724 defaults to Reverse, Park, Neutral, 1st, or 2nd gear.

Conditions for Clearing the DIC/DTC

DTCs P2723 and P2724 are Type A DTCs.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to
assist in duplicating the failure conditions.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Special Tools Required

l DT-47825 Control Solenoid Test Plate. See Special Tools.

l DT-47825-10 Jumper Harness. See Special Tools.

Circuit/System Verification

1. Perform the Transmission Fluid Check.

2. Turn ON the ignition, with the engine OFF.

IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Freeze
Frame and Failure Records.

3. Record the DTC Freeze Frame and Failure Records.

4. Clear the DTC.
5. Operate the vehicle in drive with the calculated throttle position greater than 15 percent to obtain 72 km/h
(45 mph) and achieve 5th gear. Perform this maneuver 2 times.
¡ If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

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1. Perform the Line Pressure Check.

¡ If the pressure is out of specification, correct this concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest
the DTC as outlined in the Circuit/System Verification steps.
¡ If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid
Performance Test.
¡ If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and
TCM) valve assembly.
5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris.
¡ If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Inspect the 1-2-3-4 clutch assembly for damage.

¡ If a concern is found in the 1-2-3-4 clutch assembly, repair or replace as necessary.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

PC Sol 5 Operation
Operating Conditions Normal Operation Stuck OFF Stuck ON
Steady State Gears 1, 2, 3, 4 1, 2, 3, 4 Neutral 1, 2, 3, 4
Steady State Gears 5, 6 5, 6 5, 6 1, 2, 3, 4
Garage Shift Park/Neutral/Reverse to Drive Neutral Drive Gear
Downshift from gears 5, 6 to 1,
1, 2, 3, 4 Neutral 1, 2, 3, 4
2, 3, 4
Upshift from gears 1, 2, 3, 4 to
5, 6 5, 6 1, 2, 3, 4
5, 6

Repair Procedures

l Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control valve body replacement. Refer to Control Valve Lower Body and Upper Body Replacement.

l Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
l 1-2-3-4 clutch assembly repair or replace. Refer to 1-2-3-4 and 3-5 Reverse Clutch Overhaul in the
Transmission Unit Repair Manual.
l Perform the Service Fast Learn Adapts.

DTC P2728, P2729 OR P2730

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Diagnostic Instructions

l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P2728

Clutch Pressure Control (PC) Solenoid 5 System Performance

DTC P2729

Clutch Pressure Control (PC) Solenoid 5 Control Circuit Low Voltage

DTC P2730

Clutch Pressure Control (PC) Solenoid 5 Control Circuit High Voltage

Diagnostic Fault Information

DTC P2728, P2729 or P2730

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
Clutch PC Solenoid 5 Control P2729 P2730 P2730 P2728
Clutch PC Solenoid 5 High Side
P1833 P1833 P1834 P2728
Driver 2

Typical Scan Tool Data

Clutch PC Solenoid 5
Circuit Grounded Open Shorted to Voltage
Operating conditions: Engine running, normal operating temperature
Parameter Normal Range: OK
PC 5 Sol. CKT Status Short to GND Open/Short to Volts Open/Short to Volts
High Side Driver 2 CKT Status Open/Short to GND Open/Short to GND Short to Volts

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid (w/body and TCM) valve assembly
and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 5 through the high side
driver 2 circuit. The TCM control the clutch PC solenoid 5 through the clutch PC solenoid 5 control circuit. The
normally low clutch PC solenoid 5 flows fluid to the 1-2-3-4 clutch when commanded ON and exhausts fluid
when commanded OFF. The clutch PC solenoid 5 regulates the transmission fluid pressure to the 1-2-3-4
clutch.

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Conditions for Running the DTC

l The engine run time is greater than 5 seconds.

l The clutch PC solenoid 5 is commanded ON or OFF.

Conditions for Setting the DTC

P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit and
the actual 1-2-3-4 clutch pressure does not equal the commanded 1-2-3-4 clutch pressure for 5 seconds.

P2729

The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid 5 control circuit for
300 milliseconds.

P2730

The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 5 control circuit for
300 milliseconds.

Action Taken When the DTC Sets

l DTCs P2728, P2729, and P2730 are Type A DTCs.

l The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based
on the default detected.
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTCs P2728, P2729, and P2730 are Type A DTCs.

Diagnostic Aids

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in second gear
long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the
optimal conditions to test DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

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l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Circuit Verification

Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the
optimal conditions to test solenoid electrical DTCs.

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM substrate
temperature.

Component Testing

The scan tool data parameter Clutch PC 5 Sol. CKT Status normally displays OK.

¡ If the parameter displays Open/Short to Volts or Short to GND or if the DTC resets, perform the Control
Solenoid Valve and Transmission Control Module Assembly Inspection and if no concerns are found,
replace the control solenoid (w/body and TCM) valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

DTC P2762, P2763, OR P2764

Diagnostic Instructions

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l Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
l Review Strategy Based Diagnosis for an overview of the diagnostic approach.
l Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P2762

Torque Converter Clutch (TCC) Pressure Control Solenoid System Performance

DTC P2763

Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit Low Voltage

DTC P2764

Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit High Voltage

Diagnostic Fault Information

DTC P2762, P2763, or P2764

Short to Open/High Short to Signal
Circuit Ground Resistance Voltage Performance
TCC Pressure Control Solenoid P2763 P2764 P2764 P2762
TCC Pressure Control Solenoid Side
P1833 P1833 P1834 P2762
Driver 2

Typical Scan Tool Data

TCC PC Solenoid
Circuit Grounded Open Shorted to Voltage
Operating Conditions: Engine running, normal operating temperature
Parameter Normal Range: OK
TCC PC Sol. CKT Status Short to GND Open/Short to Volts Open/Short to Volts
High Side Driver 2 CKT Status Open/Short to GND Open/Short to GND Short to Volts

Circuit/System Description

The torque converter clutch (TCC) pressure control solenoid is part of the control solenoid (w/body and TCM)
valve assembly and is not serviced separately. The TCM supplies 12 volts to the TCC pressure control solenoid
through the high side driver 2 circuit. The TCM controls the TCC solenoid through the TCC solenoid control
circuit. The normally low TCC pressure control solenoid flows fluid to the TCC when commanded ON and
exhausts fluid when commanded OFF. The TCC solenoid regulates the transmission fluid pressure to the TCC.

Conditions for Running the DTC

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l No DTCs P1833 or P1834.

l The engine run time is greater than 5 seconds.
l The TCC pressure control solenoid is commanded ON.

Conditions for Setting the DTC

P2762

The TCM detects an internal electrical performance malfunction of the TCC pressure control solenoid circuit
and the actual TCC pressure does not equal the commanded TCC pressure for 300 milliseconds.

P2763

The TCM detects an internal low voltage electrical malfunction of the TCC pressure control solenoid control
circuit for 300 milliseconds.

P2764

The TCM detects an internal high voltage electrical malfunction of the TCC pressure control solenoid control
circuit for 300 milliseconds.

Action Taken When the DTC Sets

l DTC P2762 is a Type C DTC.

l DTCs P2763 and P2764 are Type B DTCs.
l The TCM inhibits 6th gear in Hot Mode.
l The TCM inhibits TCC.
l The TCM commands maximum line pressure.
l The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

l DTC P2762 is a Type C DTC.

l DTCs P2763 and P2764 are Type B DTCs.

Diagnostic Aids

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long
enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the
optimal conditions to test DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

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Connector End View Reference

l Automatic Transmission Inline 16-Way Connector End View

l Automatic Transmission Internal Connector End Views
l Automatic Transmission Related Connector End Views

DTC Type Reference

l Diagnostic Trouble Code (DTC) Type Definitions

l Diagnostic Trouble Code (DTC) List/Type

Electrical Information Reference

l Circuit Testing
l Connector Repairs
l Testing for Intermittent Conditions and Poor Connections
l Wiring Repairs

Scan Tool Reference

l Scan Tool Output Controls

l Scan Tool Data List
l Scan Tool Data Definitions

Circuit/System Testing

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).

2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then
operate the vehicle to ensure TCC engagement for 5 seconds.
3. Observe the scan tool data parameter TCC PC Sol. CKT Status, the parameter should display OK.
¡ If the parameter displays Open, Short to Volts, Short to GND or if the DTC resets, perform the
Control Solenoid Valve and Transmission Control Module Assembly Inspection.
¡ If no concerns are found during the inspection, replace the control solenoid (w/body and TCM)
valve assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References
for replacement, setup, and programming.
2. Perform the Service Fast Learn Adapts.

SYMPTOMS - AUTOMATIC TRANSMISSION

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IMPORTANT: Use the symptom tables only if the following conditions are met:

l Refer to Diagnostic Starting Point - Vehicle .

l There are no DTCs set.
l The control modules can communicate via the serial data link.
l Review the system operation in order to familiarize yourself with the
system functions. Refer to Transmission General Description and
Transmission Component and System Description.

Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause
the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for
Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

l Fluid Diagnosis
¡ Transmission Fluid Check

¡ Fluid Pressure High or Low

¡ Automatic Transmission Fluid Leaks

¡ Fluid Leak Diagnosis

l Noise and Vibration Diagnosis

¡ Whine/Growl Noise That Changes with Vehicle Speed

¡ Noise in First or Reverse Gear

¡ Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear

¡ Noise in First, Second, Sixth, or Reverse Gear

¡ Noise in Second or Sixth Gear

¡ Noise During 3-4 or 4-3 Shifts

¡ Noise in Fourth, Fifth, or Sixth Gear

¡ Vibration

¡ Vibration in Second, Third, Fourth, Fifth, or Sixth Gear

¡ Flexplate/Torque Converter Vibration Test

¡ Noise and Vibration Analysis

l Range Performance Diagnosis

¡ No Park or Drive

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¡ No Drive in All Ranges

¡ No Reverse Gear

¡ No Drive or Reverse Gear

l Shift Quality Feel Diagnosis

¡ Harsh Garage Shift

¡ Harsh, Soft, Delayed or Slipping First or Reverse Gear

¡ Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift

¡ Harsh, Soft, Delayed or Slipping 4-5-6 Shift

¡ Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear

¡ Harsh, Soft, Delayed or Slipping Second or Sixth Gear

l Shift Pattern
¡ No First Gear

¡ No First and Reverse Gears

¡ No First, Second, Third, and Fourth Gear

¡ No First, Second, Third, Fourth, Fifth, or Reverse Gear

¡ No Second and Sixth Gear

¡ No First, Second, Sixth, or Reverse Gear

¡ No Fourth, Fifth, and Sixth Gear

¡ No Third, Fifth, and Reverse Gear

¡ Stuck in Second or Sixth Gear

¡ Stuck in First or Reverse Gear

l Torque Converter Diagnosis

¡ Torque Converter Diagnosis

¡ No Torque Converter Clutch Apply

¡ No Torque Converter Clutch Release

l Symptom Not Found or No Symptom Detected

¡ Transmission Fluid Check

¡ Road Test

¡ Line Pressure Check

CONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE ASSEMBLY

INSPECTION

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Fig. 26: Control Solenoid Valve & Transmission Control Module Assembly
Courtesy of GENERAL MOTORS CORP.

1. Inspect the control solenoid (w/body and TCM) valve assembly connectors and pins (2, 3, 4) for the
following conditions:
l Damage

l Bent pins

l Debris

l Broken retaining tab

l Contamination

2. Ensure no metallic debris is inside the connectors near the terminal pins.
3. Inspect the control solenoid (w/body and TCM) valve assembly solenoid leads (1) for contamination or
metallic debris.
4. Inspect the 4 control solenoid (w/body and TCM) valve assembly filter plate retaining tabs (5) for cracks
and ensure proper tension when filter plate is attached.

CONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE ASSEMBLY INPUT

SHAFT SPEED/OUTPUT SHAFT SPEED INPUT TEST

Tools Required

l J 35616 GM-Approved Terminal Test Kit. See Special Tools.

l J 38522 Variable Signal Generator

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Fig. 27: Testing Using J 35616

Courtesy of GENERAL MOTORS CORP.

The purpose of this test is to provide a simulated input/output speed sensor (ISS/OSS) signal to the control
solenoid (w/body and TCM) valve assembly ISS/OSS input circuits.

1. Disconnect the ISS/OSS wiring harness connector from the control solenoid (w/body and TCM) valve
assembly.
2. Using the J 35616 , connect the J 38522 to the affected ISS or OSS signal circuit on the control solenoid
(w/body and TCM) valve assembly.
1. Set the J 38522 Signal to 8 volts, the Frequency to 120 and the Percent Duty Cycle to 50.
2. Ignition On, observe either the scan tool parameter ISS Signal or OSS Signal.
3. The signal parameter should display between 100-400 RPM.

¡ If the signal display is not in this range, the control solenoid (w/body and TCM) valve assembly is not
reading the input signal correctly and is faulty.

CONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE ASSEMBLY

CLEANING

The control solenoid (w/body and TCM) valve assembly cleaning procedure is a specific software based
routine, which resides in the TCM. This procedure is activated by the scan tool and is used to cycle the
solenoids and valves in the control solenoid valve assembly in an attempt to dislodge debris and free up the
valves after a performance diagnostic trouble code (DTC) has set. When the cleaning procedure is completed,
the DTC enable criteria is run again, and retested to see if the DTC concern has been corrected.

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1. Operate the transmission to achieve 70°-90°C (158°-194°F).

2. With a scan tool, select the Service Cleaning Procedure. Initiate the cleaning procedure.
3. When the cleaning procedure is completed, shut OFF the ignition for 30 seconds.

CONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE ASSEMBLY

SOLENOID PERFORMANCE TEST

Tools Required

DT-47825 Control Solenoid Test Plate. See Special Tools.

The purpose of this procedure is to test the operation of the control solenoid (w/body and TCM) valve assembly
for a stuck open or stuck closed solenoid. The DT-47825 bolts to the mounting surface of the control solenoid
(w/body and TCM) valve assembly. See Special Tools. Compressed air is attached to the test block, through the
control solenoid (w/body and TCM) valve assembly solenoid passage and back to a pressure gage on the test
plate, sent through the control solenoid (w/body and TCM) valve assembly solenoid, and back to the test plate
pressure port.

An air pressure gage is used to display the air passing through the solenoid. If the solenoid is unable to allow air
through or the air is constantly flowing through the solenoid may be stuck. The scan tool is used to command
the solenoids On and Off while watching the air pressure test gage to determine if the solenoid is functioning
correctly. The recommended shop air pressure for this test is 620.5-689.4 kPa (90-100 psi).

Fig. 28: Control Solenoid (w/Body and TCM) Valve Assembly with Control Solenoid Test Plate
Courtesy of GENERAL MOTORS CORP.

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Callout Component Name

1 Filter Plate Assembly
2 Control Solenoid Valve Assembly
3 DT-47825 Control Solenoid Test Plate
4 Air Connection Port
5 Transmission 16-Way Pass-Through Connector
6 Electrical Connector Slide Lock

IMPORTANT: To avoid solenoid overheating and possible internal damage, do not

continuously operate the solenoid for more than 2 minutes at a time.

The TCM will normally cycle some of the transmission solenoids On and Off to keep the solenoid passages
clean and clear, This is a normal function and will cause the valves to cycle open and closed quickly when the
TCM is powered up. This will make the pressure gage needle flicker or move from high and low as the valves
open and close, allowing air to exit the ports where the pressure gage is not connected.

It is necessary to drain the control solenoid (w/body and TCM) valve assembly of all remaining transmission
fluid before attaching the test plate. Use caution when attaching air to the test plate, as any remaining
transmission fluid in the control solenoid (w/body and TCM) valve assembly will be forced out. Use shop
towels to cover the test plate ports in order to prevent fluid from being released into the air.

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission fluid pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan
and/or Filter Replacement.
3. Remove the transmission electrical connector. Refer to Automatic Transmission Electrical Connector
Passage Sleeve Replacement.
4. Remove the control solenoid (w/body and TCM) valve assembly from the transmission. Refer to Control
Valve Lower Body and Upper Body Replacement.

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Fig. 29: Solenoid Testing Procedure

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Regulated Air Supply
2 Test Ports
3 Scan Tool
4 Test Pressure Gage
5 Electrical Connector Sleeve

NOTE: The TCM connector sleeve allows the test tool harness to be correctly
orientated for electrical operation of the TCM. Do not connect the test
harness to the TCM without using the connector sleeve. Failure to use the
sleeve could allow the test harness to be incorrectly positioned which will
result in permanent TCM damage.

1. Align and install the electrical connector sleeve to the control solenoid (w/body and TCM) valve
assembly and secure with the connector slide lock.
2. If necessary, clean each side of the filter plate assembly and install the filter plate assembly back on the
control solenoid (w/body and TCM) valve assembly. Clean the mounting surface of the DT-47825 . See
Special Tools.
3. Bolt the DT-47825 to the control solenoid (w/body and TCM) valve assembly mounting surface. See
Special Tools. Use the bolts and washers supplied with the tool to attach the test block. Tighten the bolts
to 5 N.m (44 lb in).
4. Connect the test harness supplied with the DT-47825 to the vehicle harness and to the TCM. See Special

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Tools. Engage the connector locks.

5. Connect shop air to the DT-47825 air inlet. See Special Tools. Do not exceed the recommended air
pressure of 620.5-689.4 kPa (90-100 psi).
6. With the ignition ON and the scan tool communicating with the vehicle, command the solenoid in
question On and Off. Watch the air pressure gage for a change as you command the solenoid. Refer to
Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Plate to Component
Identification for correct solenoid function and test plate port connections for the solenoid being tested.
7. The solenoid should allow air pressure to flow or prevent air pressure flow depending on the solenoid
state. The test results are read on the pressure gage.
8. Command the solenoid valve On and Off several times to determine the condition of the solenoid in
question. Release the test air pressure from the pressure the gage between solenoid tests.

Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Block to Component
Identification
Key On, Engine Off
Test Plate (KOEO) Normal Commanded State
Solenoid Port State
Increase/Decrease Approximately 68-103
*Line PC Solenoid 1 G No flow to gage kPa (10-15 psi) per command
On - Full flow to Off - No flow to
PC Solenoid 2 C No flow to gage
gage gage
On - Full flow to Off - No flow to
PC Solenoid 3 A Full flow to gage
gage gage
On - Full flow to Off - No flow to
PC Solenoid 4 B No flow to gage
gage gage
On - Full flow to Off - No flow to
PC Solenoid 5 F No flow to gage
gage gage
Off - No flow to On - Full flow to
Shift Solenoid 1 H Full flow to gage
gage gage
Off - No flow to On - Full flow to
Shift Solenoid 2 D No flow to gage
gage gage
On - Full flow to Off - No flow to
TCC PC Solenoid E No flow to gage
gage gage
* Increment solenoid to maximum pressure and then decrease to minimum pressure to ensure full range
of operation.

SERVICE FAST LEARN ADAPTS

IMPORTANT: Do not utilize the Tech 2 service fast learn (SFL) adapt procedure. The
procedure will not run properly for all 2006 RWD 6-speed automatic
transmissions. Instead, perform the following drive cycle, which is also
published in the service preliminary information (PI) document 1816258. This
driving procedure will produce similar SFL adaptive results. The Tech 2 SFL
adapt procedure is not functioning properly and should not be used to learn
shift adapts.

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Service Fast Learn Adapts is a procedure for 6-speed automatic transmissions in which a series of driving
maneuvers are used to allow the transmission control module (TCM) to learn individual clutch characteristics.
Once the clutch data is learned, Service Fast Learn Adapts translates it into the adaptive data cells, which the
TCM uses for clutch control during shifts.

When running the SFL adapts procedure with the Tech 2, the procedure may fail. The following drive
procedure can be successfully used as a substitute:

The drive procedure is required when:

l The TCM calibration is changed.

l Internal transmission repairs such as valve body or control solenoid w/TCM replacement or overhaul.

The drive procedure is NOT required when:

The transmission is replaced. Replacement transmission assemblies already have the adapts set by the
transmission assembly plant.

Before and During Drive Cycle

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.

l Drive maneuvers should be performed when the transmission oil temperature is at least 40°C (104°F).
l Transmission oil level is properly set before starting drive cycles.
l Initial up shifts may be erratic for several drive cycles. They should improve significantly with repeated
maneuvers.
l At the start of the drive cycles, check for ECM or TCM, DTCs and be sure the MIL is not be illuminated.

Drive Cycle

IMPORTANT: Drive cycle requires five light throttle accelerations to 40 km/h (25 mph) and
five light throttle accelerations to 63 km/h (40 mph).

1. From a complete stop, lightly accelerate at a relatively constant throttle pedal position up to 40 or 63
km/h (25 or 40 mph).
2. Brake the vehicle to a complete stop.
3. Repeat five times to 40 km/h (25 mph) and five times to 63 km/h (40 mph). Maneuvers can be performed
in any combinations.

Garage Shifts

If the garage shifts (Park to Reverse, Park to Drive, Reverse to Drive, Drive to Reverse) feel like they are
delayed or are harsh, garage shift adapts can also be performed.

IMPORTANT: All garage shifts should be performed with the vehicle stopped, foot on the

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brake and engine at idle.

1. Shift the transmission from Reverse to Drive leaving the shift lever in Drive for 3 seconds. After 3
seconds, shift back to Reverse leaving the shift lever in Reverse for 3 seconds. Perform the procedure 10
times (R-D-R-D-R-D...). The shift transitions need to be directly to Drive and Reverse, without stopping
in Neutral.
2. Shift the transmission from Neutral to Drive leaving the shift lever in Drive for 3 seconds. After 3
seconds, shift back to Neutral leaving the shift lever in Neutral for 3 seconds. Perform the procedure 10
times (N-D-N-D-N-D...).
3. Shift the transmission from Neutral to Reverse leaving the shift lever in Reverse for 3 seconds. After 3
seconds, shift back to Neutral leaving the shift lever in Neutral for 3 seconds. Perform the procedure 10
times (R-D-R-D-R-D...).

At the end of these maneuvers, the vehicle may still experience some minor driveability issues, but should learn
improved shifting performance over the next several key cycles and driving time. Coach the customer about the
transmission's ability to self correct shifting issues or concerns. The transmission adapts are always functional
and operate at transmission oil temperatures above 40°C (104°F).

TRANSMISSION FLUID CHECK

This procedure checks both the transmission fluid level, as well as the condition of the fluid itself. Since the
transmission on this vehicle is not equipped with a fill tube and dipstick, a tube in the bottom pan is used to set
the fluid level.

NOTE: The transmission fluid level must be checked when the transmission fluid
temperature (TFT) is between 30-50°C (86-122°F). If the TFT is not within this
range, operate the vehicle or allow the fluid to cool as required. Setting the fluid
level with a TFT outside this range will result in either an under or overfilled
transmission. TFT>50°C=under-filled, TFT<30°C=over-filled. An under-filled
transmission will cause premature component wear or damage. An overfilled
transmission will cause fluid to discharge out the vent tube, fluid foaming, or
pump cavitation.

1. Observe the TFT using the driver information center (DIC) or a scan tool.
2. Start and idle the engine.
3. Depress the brake pedal and move the shift lever through each gear range. Pause for at least 3 seconds in
each range. Move the shift lever back to PARK. Ensure the engine RPM is low (500-800 RPM).
4. Allow the engine to idle for at least 1 minute.
5. Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the
PARK range.

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Fig. 30: Transmission Oil Level Check Plug

Courtesy of GENERAL MOTORS CORP.

NOTE: THE ENGINE MUST BE RUNNING when the trans oil level check plug is
removed or excessive fluid loss will occur, resulting in an under-filled
condition. An under-filled transmission will cause premature component
wear or damage.

IMPORTANT: Continue to monitor the TFT. If the TFT is not within the specified values,
reinstall the trans oil level check plug and repeat the previous steps.

6. Remove the trans oil level check plug (1) from the transmission fluid pan. Allow any fluid (2) to drain.
l If the fluid is flowing as a steady stream, wait until the fluid begins to drip.

l If no fluid comes out, add fluid until fluid drips out. Refer to Transmission Fluid Fill Procedure .

7. Inspect the fluid color. The fluid should be red or dark brown.
l If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of the
bottom pan for excessive metal particles or other debris. A small amount of "friction" material in
the bottom pan is a "normal" condition. If large pieces and/or metal particles are noted in the fluid
or bottom pan, flush the oil cooler and cooler lines and overhaul the transmission. If there are no
signs of transmission internal damage noted, replace the fluid filter assembly, repair the oil cooler,
and flush the cooler lines.
l Fluid that is cloudy or milky or appears to be contaminated with water indicates engine coolant or
water contamination. Refer to Engine Coolant/Water in Transmission .

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NOTE: Refer to Fastener Notice .

8. Replace the trans oil level check plug and tighten to 25 N.m (18 lb ft).
9. Inspect for external leaks. Refer to Fluid Leak Diagnosis.
10. Reset the oil life monitor only if the fluid was changed.

TRANSMISSION FLUID FILL PROCEDURE

NOTE: Use Dexron VI transmission fluid only. Failure to use the proper fluid may result
in transmission internal damage.

Perform this procedure for vehicles with transmissions that are not equipped with a fill tube and dipstick. Based
on accessibility, transmission fluid may be added through the fluid fill tube plug assembly (1) hole or through
the oil level check plug (2) hole in the bottom of the transmission fluid pan.

Tools Required

l DT 47784 Transmission Fluid Fill Pan Adapter. See Special Tools.

l J 45096 Transmission Oil Cooling System Flush and Flow Test Tool
l J 45096-30 Transmission Cooler Flush Adapters. See Special Tools.
l J 45096-40 Transflow Oil Fill Adapter. See Special Tools.

Fill Tube Plug Method

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Fig. 31: Fluid Fill Tube Plug

Courtesy of GENERAL MOTORS CORP.

NOTE: Before removing the transmission fluid fill tube plug assembly, thoroughly
clean around the plug to prevent dirt or contaminants from entering the
transmission during plug removal. Use compressed air to dislodge any
caked dirt that may be stuck on and around the plug area. Use a mirror to
confirm the area is free of dirt before removing the plug. Failure to clean
around the plug may result in transmission contamination.

1. Clean around the fluid fill tube plug.

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Fig. 32: Fill Tube Plug Plunger

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: It may be necessary to use a long pair of 90 degree needle nose pliers to
lift the plunger and remove the plug assembly.

2. Unlock the fill tube plug by lifting the plunger. Once the plunger is lifted, remove the entire plug
assembly.
3. Determine the approximate amount of fluid needed to fill the transmission, based on the repair performed.
Refer to Fluid Capacity Specifications. To avoid an under-fill condition, slightly overfill the
transmission, and then allow the extra fluid to drain during the fluid checking procedure.

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Fig. 33: Adding Transmission Fluid Through The Fill Tube Plug Opening
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The J 45096 is being utilized as a convenient method to pump the fluid
into the bottom pan. A suitable hand pump may also be used instead.
When using the J 45096 , monitor the display panel to determine the
amount of fluid being pumped from the tool supply tank into the
transmission.

4. Using the J 45096-40 (1) and the J 45096 (2), or a suitable hand pump, add transmission fluid through
the fill tube plug opening. Refer to Transmission Fluid Cooler Flushing and Flow Test (J 45096) for
complete J 45096 operating instructions. Use the FLOW position on the main function switch to pump
the fluid.
5. Check the fluid level. Refer to Transmission Fluid Check.

Check Plug Method

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Fig. 34: Oil Level Check Plug

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: When the oil level check plug is removed with the engine OFF,
transmission fluid may drain from the hole.

1. Remove the oil level check plug.

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Fig. 35: Pumping Fluid Into The Bottom Pan

Courtesy of GENERAL MOTORS CORP.

2. Install the DT 47784 (1) and, if necessary, one adapter from the J 45096-30 (2). See Special Tools.
3. Determine the approximate amount of fluid needed to fill the transmission, based on the repair performed.
Refer to Fluid Capacity Specifications. To avoid an under-fill condition, slightly overfill the
transmission, and then allow the extra fluid to drain during the fluid checking procedure.

IMPORTANT: The J 45096 is being utilized as a convenient method to pump the fluid
into the bottom pan. A suitable hand pump may also be used instead.
When using the J 45096, monitor the display panel to determine the
amount of fluid being pumped from the tool supply tank into the
transmission.

4. Using the DT 47784 (1), J 45096-30 (2), and the J 45096 (3), add transmission fluid through the check
plug hole. Refer to Transmission Fluid Cooler Flushing and Flow Test (J 45096) for complete J 45096
operating instructions. Use the FLOW position on the main function switch to pump the fluid.

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IMPORTANT: Failure to start the engine and move the shift lever through the gear
ranges before removing the DT 47784 and J 45096-30 from the bottom pan
will result in an excess amount of fluid draining from the check plug hole.
See Special Tools. This may lead to an under-fill condition.

5. Start the engine and move the shift lever through each gear range. Pause for at least 3 seconds in each
gear range.
6. With the engine still running, remove the DT 47784 (1), J 45096-30 (2), and J 45096 (3) and then check
the fluid level. Refer to Transmission Fluid Check.

LINE PRESSURE CHECK

Fig. 36: Identifying J 21867 Pressure Gage

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Courtesy of GENERAL MOTORS CORP.

Tools Required

J 21867 Pressure Gage

CAUTION: Keep the brakes applied at all times in order to prevent unexpected
vehicle motion. Personal injury may result if the vehicle moves
unexpectedly.

1. Install a scan tool.

2. Start the engine.
3. Inspect the transmission for the proper fluid level. Refer to Transmission Fluid Check.
4. Use the scan tool to inspect for any active or stored diagnostic trouble codes.
5. Inspect the manual linkage at the transmission for proper function.
6. Turn the engine OFF.

IMPORTANT: You may need to remove or disconnect components in order to gain

access to the transmission line pressure test hole plug.

7. Remove the line pressure test hole plug.

8. Install the J 21867 .
9. Access the Scan Tool Transmission Output Controls for the Line PC Solenoid.
10. Start the engine.

IMPORTANT: In order to achieve accurate line pressure readings, the following

procedure must be performed at least 3 times in order to gather uniform
pressure readings.
The scan tool is only able to control the line PC solenoid in PARK and
NEUTRAL with engine speeds below 1500 RPM. This protects the clutches
from extreme high or low line pressures.

11. Use the scan tool to increase and decrease the Line PC Solenoid in increments of approximately 100 kPa
(15 psi). The scan tool commands the increment values automatically.
12. Allow the pressure to stabilize between increments.
13. Compare your pressure readings on the scan tool to those indicated on the J 21867 .
14. If the pressure readings vary greatly, refer to Fluid Pressure High or Low.
15. Turn the engine OFF.
16. Remove the J 21867 .

NOTE: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or

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sealant are identified in the service procedure. Do not use paints,

lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces
unless specified. These coatings affect fastener torque and joint clamping
force and may damage the fastener. Use the correct tightening sequence
and specifications when installing fasteners in order to avoid damage to
parts and systems.

17. Install the line pressure test hole plug.

Tighten: Tighten the pressure plug to 11 N.m (97 lb in).

ROAD TEST

IMPORTANT: The Road Test Procedure should be performed only as part of the Symptom
Diagnosis. Refer to Symptoms - Automatic Transmission.

The following test provides a method of evaluating the condition of the automatic transmission. The test is
structured so that most driving conditions would be achieved. The test is divided into the following parts:

l Electrical Function Check

l Upshift Control and Torque Converter Clutch (TCC) Apply
l Part Throttle Detent Downshifts
l Manual Downshifts
l Coasting Downshifts
l Manual Gear Range Selection
¡ REVERSE

¡ Driver Shift Control

IMPORTANT: Complete the test in the sequence given. Incomplete testing cannot guarantee
an accurate evaluation.

Before the road test, ensure the following:

l The engine is performing properly.

l Transmission fluid level is correct. Refer to Transmission Fluid Check.
l Tire pressure is correct.

During the road test:

l Perform the test only when traffic conditions permit.

l Operate the vehicle in a controlled, safe manner.
l Observe all traffic regulations.
l View the scan tool data while conducting this test.

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Take along qualified help in order to operate the vehicle safely.

l Observe any unusual sounds or smells.

After the road test, check the following:

l Inspect for proper transmission fluid level. Refer to Transmission Fluid Check.
l Inspect for any diagnostic trouble codes (DTCs) that may have set during the testing. Refer to the
applicable DTC.
l Monitor the scan tool data for any abnormal readings or data.
l Inspect for fluid leaks. Refer to Fluid Leak Diagnosis.

Electrical Function Check

Perform this procedure first in order to ensure the electronic transmission components are functioning properly.
If these components are not checked, a simple electrical condition could be misdiagnosed.

1. Connect the scan tool.

2. Ensure the gear selector is in PARK and set the parking brake.
3. Start the engine.
4. Verify that the following scan tool data can be obtained and is functioning properly.

Refer to Scan Tool Data List for typical data values. Data that is questionable may indicate a concern.

l Engine Speed
l Transmission ISS
l Transmission OSS
l Vehicle Speed
l IMS
l Commanded Gear
l Gear Ratio
l Line PC Sol. Pressure Cmd.
l TCC Brake Switch
l ECT, Engine Data List
l Trans. Fluid Temp.
l TCM Temperature
l Calc. Throttle Position
l Ignition Voltage
l TFP Switch 1
l TFP Switch 3
l TFP Switch 4

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lTFP Switch 5
l PC Sol. 2 Pressure Cmd.

l PC Sol. 3 Pressure Cmd.

l PC Sol. 4 Pressure Cmd.

l PC Sol. 5 Pressure Cmd.

l Shift Solenoid 1

l Shift Solenoid 2

l TCC PC Sol. Duty Cycle

l TCC Slip Speed

5. Monitor the TCC Brake Switch parameter while applying and releasing the brake pedal. The scan tool
should display:
l Open when the brake pedal is applied.

l Closed when the brake pedal is released.

6. Check the garage shifts.

1. Apply the brake pedal and ensure the parking brake is set.
2. Move the gear selector through the following ranges:
1. PARK to REVERSE
2. REVERSE to NEUTRAL
3. NEUTRAL to DRIVE
3. Pause 2 to 3 seconds in each gear position.
4. Verify the gear engagements are immediate and not harsh.

IMPORTANT: Harsh engagement may be caused by any of the following conditions:

l High engine idle speed-Compare engine idle speed to desired idle

speed.
l Commanded low pressure control (PC) solenoid current-Investigate
PC Sol. Pressure Cmd. kPa (psi) for all solenoids. High pressure will
cause harsh shifts.
l A default condition caused by certain DTCs that result in maximum
line pressure to prevent clutch slippage.

IMPORTANT: Soft or delayed engagement may be caused by any of the following

conditions:

l Low idle speed - Compare engine idle speed to desired idle speed.
l Low fluid level
l Commanded high PC solenoid current - Investigate PC Sol. Pressure
Cmd. kPa (psi) for all solenoids. Low pressure will cause soft or
delayed shifts.

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l Cold transmission fluid temperature (TFT) - Use the scan tool to

determine TFT.
l Selector linkage - Inspect and adjust as necessary.

7. Monitor transmission range on the scan tool, engine data list.

1. Apply the brake pedal and ensure the parking brake is set.
2. Move the gear selector through all ranges.
3. Pause 2 to 3 seconds in each range.
4. Return gear selector to PARK.
5. Verify that all selector positions match the scan tool display.
8. Check throttle position input.
1. Apply the brake pedal and ensure the parking brake is set.
2. Ensure the gear selector is in PARK.
3. Monitor the scan tool Calc. Throttle Position while increasing and decreasing engine speed with the
throttle pedal. The scan tool Calc. Throttle Position percentage should increase and decrease with
engine speed.

If any of the above checks do not perform properly, record the result for reference after completion of the road
test.

Upshift Control and Torque Converter Clutch (TCC) Apply

The TCM calculates the upshift points based primarily on 2 inputs: throttle position and vehicle speed. When
the TCM determines that conditions are met for a shift to occur, the TCM commands the shift by closing or
opening the ground circuit for the appropriate solenoid.

Perform the following steps:

1. Refer to Shift Speed table in this section and choose a throttle position of 12.5 percent or 25 percent. All
throttle positions shown should be tested to cover the normal driving range.
2. Monitor the following scan tool parameters:
l Calc. Throttle Position

l Vehicle Speed

l Engine Speed

l Transmission ISS

l Transmission OSS

l Commanded Gear

l TCC PC Sol. Pressure Cmd.

l TCC Pressure Actual

l TCC Slip Speed

l TFP Switch 1

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l TFP Switch 3
l TFP Switch 4

l TFP Switch 5

l PC Sol. 2 Pressure Cmd.

l PC Sol. 3 Pressure Cmd.

l PC Sol. 4 Pressure Cmd.

l PC Sol. 5 Pressure Cmd.

l Shift Solenoid 1 and 2

3. Place the gear selector in the DRIVE position.

4. Accelerate the vehicle using the chosen throttle position. Hold the throttle steady.
5. As the transmission upshifts, there should be a noticeable shift feel or engine speed change within 1 to 2
seconds of the commanded gear change. The TCC feel may not be noticeable. Look for 100-300 RPM
engine speed change.
6. Compare the shift speeds to the Shift Speed table. Refer to Shift Speed. Shift speeds may vary slightly
due to TFT or other operating variables, including hydraulic delays in responding to electronic controls.
l Note any harsh, soft or delayed shifts or slipping.

l Note any noise or vibration.

IMPORTANT: This transmission is equipped with an electronically controlled capacity

clutch (ECCC), which does not allow the clutch to fully lock to the torque
converter cover. The clutch maintains a small amount of slippage,
approximately 20 RPM, in 2nd, 3rd, 4th, 5th, and 6th gears, depending on
the vehicle application. ECCC was developed to reduce the possibility of
noise, vibration or chuggle caused by TCC apply. Full lockup is available
at highway speeds on some applications.

IMPORTANT: The TCC will not engage until the engine is in closed loop operation and
the vehicle speed is as shown in the Shift Speed table. Refer to Shift
Speed. The vehicle must be in a near-cruise condition, not accelerating or
coasting, and on a level road surface.

7. Monitor TCC PC solenoid current while driving and make sure the current rises when the TCC is
commanded to apply.
l When the TCC applies there should be a noticeable drop in engine speed and a drop in slip speed to
below 100 RPM. If the TCC apply can not be detected:
¡ Check for DTCs.

¡ Refer to Torque Converter Diagnosis.

l Apply and release the brake pedal. The TCC will release on most applications.

Part Throttle Detent Downshift

1. Place the gear selector in the DRIVE position.

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2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in 6th gear.

3. Quickly increase throttle angle to between 25-30 percent.
4. Verify the following:
l The TCC releases.

l The transmission downshifts immediately.

Manual Downshifts

Manual downshift testing is not required for vehicles equipped with Driver Shift Control (DSC). The TCM and
shift solenoids will automatically override DSC downshifts to protect the transmission from damage.

Coasting Downshifts

1. Place the gear selector in the DRIVE position.

2. Accelerate the vehicle to 6th gear with the TCC applied.
3. Release the throttle and apply the brakes
4. Verify the following:
l The TCC releases (on most applications).

l Downshifts occur as commanded.

Manual Gear Range Selection

This application does not utilize manual forward gear ranges.

Reverse

Perform the following test using a 10-15 percent throttle position.

1. With the vehicle stopped, move the gear selector to REVERSE.

2. Slowly accelerate the vehicle.
3. Verify that there is no noticeable slip, noise or vibration.

Driver Shift Control (DSC)

Refer to the owner's manual for specific instructions on DSC. The TCM will upshift automatically when
maximum engine speed is achieved and will protect from any downshift which may cause excessive engine
RPMs.

TORQUE CONVERTER DIAGNOSIS

The torque converter clutch (TCC) is applied by fluid pressure, which is controlled by a TCC pressure control
(PC) solenoid. This solenoid is part of the control solenoid valve assembly, which is located inside the
automatic transmission assembly. The solenoid is controlled through a combination of computer controlled
switches and sensors.

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Torque Converter Stator

The torque converter stator roller clutch can have 2 different malfunctions.

l The stator assembly freewheels in both directions.

l The stator assembly remains locked up at all times.

Poor Acceleration at Low Speed

If the stator is freewheeling at all times, the vehicle tends to have poor acceleration from a standstill. At speeds
above 50-55 km/h (30-35 mph), the vehicle may act normally. For poor acceleration, you should first determine
that the exhaust system is not blocked, and the transmission is in First gear when starting out.

If the engine freely accelerates to high RPM in NEUTRAL, you can assume that the engine and the exhaust
system are normal. Check for poor performance in DRIVE and REVERSE to help determine if the stator is
freewheeling at all times.

Poor Acceleration at High Speed

If the stator is locked up at all times, performance is normal when accelerating from a standstill. Engine RPM
and vehicle speed are limited or restricted at high speeds. Visual examination of the converter may reveal a blue
color from overheating.

If the converter has been removed, you can check the stator roller clutch by inserting a finger into the splined
inner race of the roller clutch and trying to turn the race in both directions. You should be able to freely turn the
inner race clockwise, but you should have difficulty in moving the inner race counterclockwise or you may be
unable to move the race at all.

Noise

IMPORTANT: Do not confuse this noise with pump whine noise, which is usually noticeable
in PARK, NEUTRAL and all other gear ranges. Pump whine will vary with line
pressure.

You may notice a torque converter whine when the vehicle is stopped and the transmission is in DRIVE or
REVERSE. This noise will increase as you increase the engine RPM. The noise will stop when the vehicle is
moving or when you apply the torque converter clutch, because both halves of the converter are turning at the
same speed.

Perform a stall test to make sure the noise is actually coming from the converter:

1. Place your foot on the brake.

2. Put the gear selector in DRIVE.

NOTE: You may damage the transmission if you depress the accelerator for more
than 6 seconds.

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3. Depress the accelerator to approximately 1,200 RPM for no more than six seconds.

A torque converter noise will increase under this load.

Torque Converter Clutch Shudder

The key to diagnosing torque converter clutch (TCC) shudder is to note when it happens and under what
conditions.

TCC shudder which is caused by the transmission should only occur during the apply or the release of the
converter clutch. Shudder should never occur after the TCC plate is fully applied.

If Shudder Occurs During TCC Apply or Release

If the shudder occurs while the TCC is applying, the problem can be within the transmission or the torque
converter. Something is causing one of the following conditions to occur:

l Something is not allowing the clutch to become fully engaged.

l Something is not allowing the clutch to release.
l The clutch is releasing and applying at the same time.

One of the following conditions may be causing the problem to occur:

l Leaking turbine shaft seals

l A restricted release orifice
l A distorted clutch or housing surface due to long converter bolts
l Defective friction material on the TCC plate

If Shudder Occurs After TCC has Applied

If shudder occurs after the TCC has applied, most of the time there is nothing wrong with the transmission.

The TCC is not likely to slip after the TCC has been applied. Engine problems may go unnoticed under light
throttle and load, but they become noticeable after the TCC apply when going up a hill or accelerating. This is
due to the mechanical coupling between the engine and the transmission.

Once TCC is applied, there is no torque converter (fluid coupling) assistance. Engine or driveline vibrations
could be unnoticeable before TCC engagement.

Inspect the following components in order to avoid misdiagnosis of TCC shudder. An inspection will also avoid
the unnecessary disassembly of a transmission or the unnecessary replacement of a torque converter.

l Spark plugs-Inspect for cracks, high resistance or a broken insulator.

l Plug wires-Look in each end. If there is red dust (ozone) or a black substance (carbon) present, then the
wires are bad. Also look for a white discoloration of the wire. This indicates arcing during hard
acceleration.

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l Coil-Look for a black discoloration on the bottom of the coil. This indicates arcing while the engine is
misfiring.
l Fuel injector-The filter may be plugged.
l Vacuum leak-The engine will not get a correct amount of fuel. The mixture may run rich or lean
depending on where the leak occurs.
l EGR valve-The valve may let in too much or too little unburnable exhaust gas and could cause the engine
to run rich or lean.
l MAP/MAF sensor-Like a vacuum leak, the engine will not get the correct amount of fuel for proper
engine operation.
l Carbon on the intake valves-Carbon restricts the proper flow of air/fuel mixture into the cylinders.
l Flat cam-Valves do not open enough to let the proper fuel/air mixture into the cylinders.
l Oxygen sensor-This sensor may command the engine too rich or too lean for too long.
l Fuel pressure-This may be too low.
l Engine mounts-Vibration of the mounts can be multiplied by TCC engagement.
l Axle joints-Check for vibration.
l TP Sensor-The TCC apply and release depends on the TP Sensor in many engines. If the TP Sensor is out
of specification, TCC may remain applied during initial engine loading.
l Cylinder balance-Bad piston rings or poorly sealing valves can cause low power in a cylinder.
l Fuel contamination-This causes poor engine performance.

Replace the torque converter if any of the following conditions exist:

l External leaks appear in the hub weld area.

l The converter hub is scored or damaged.
l The converter pilot is broken, damaged, or fits poorly into the crankshaft.
l You discover steel particles after flushing the cooler and the cooler lines.
l The pump is damaged, or you discover steel particles in the converter.
l The vehicle has TCC shudder and/or no TCC apply. Replace the torque converter only after all hydraulic
and electrical diagnoses have been made. The converter clutch material may be glazed.
l The converter has an imbalance which cannot be corrected. Refer to Flexplate/Torque Converter
Vibration Test.
l The converter is contaminated with engine coolant which contains antifreeze or water.
l An internal failure occurs in the stator roller clutch.
l You notice excessive end play.
l Overheating produces heavy debris in the clutch or converter ballooning.
l You discover steel particles or clutch lining material in the fluid filter or on the magnet, when no internal
parts in the unit are worn or damaged. This condition indicates that lining material came from the
converter.

Do not replace the torque converter if you discover any of the following symptoms:

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l The oil has an odor or the oil is discolored, even though metal or clutch facing particles are not present.
l The threads in one or more of the converter bolt holds are damaged. Correct the condition with a new
thread inset.
l Transmission failure did not display evidence of damaged or worn internal parts, steel particles or clutch
plate lining material in the unit and inside the fluid filter.
l The vehicle has been exposed to high mileage only. An exception may exist where the lining of the
torque converter clutch dampener plate has seen excess wear by vehicles operated in heavy and/or
constant traffic, such as taxi, delivery, or police use.

FLEXPLATE/TORQUE CONVERTER VIBRATION TEST

Isolating Vibration

NOTE: Some engine/transaxle combinations cannot be balanced in this manner due to

restricted access or limited clearances between the torque converter bolts and
the engine. Ensure that the bolts do not bottom out in the lug nuts or the torque
converter cover which could dent and cause internal damage.

To isolate and correct a flywheel or torque converter vibration, separate the torque converter from the flywheel
to determine if vibration is in the engine or transmission.

1. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
2. Turn the engine OFF.
3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
4. Remove the transmission converter cover bolts and the cover.
5. Mark the relationship of the converter to the flywheel.
6. Remove the bolts attaching the converter to the flywheel.
7. Slide the torque converter away from the flywheel.
8. Rotate the flywheel and torque converter to inspect for defects or missing balance weights.
9. Lower the vehicle.
10. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration. Refer
to Diagnostic Starting Point - Vibration Diagnosis and Correction .
11. Turn the engine OFF.

Indexing Torque Converter

To determine and correct a torque converter vibration, the following procedure may have to be performed
several times to achieve the best possible torque converter to flywheel balance.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Rotate the torque converter one bolt position.

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Fig. 37: View Of Torque Converter Hub In Engine Crankshaft

Courtesy of GENERAL MOTORS CORP.

3. Align the torque converter hub (2) in the engine crankshaft (3) and install the torque converter to flywheel
bolts.
4. Lower the vehicle.
5. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration. Refer
to Noise and Vibration Analysis .

Repeat this procedure until you obtain the best possible balance.

6. Install the transmission converter cover bolts and the cover.

CLUTCH PLATE DIAGNOSIS

Composition Plates

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Dry the plates and inspect the plates for the following conditions:

l Pitting
l Flaking
l Delamination - splitting or separation of bonded clutch material
l Wear
l Glazing
l Cracking
l Charring
l Chips or metal particles embedded in the lining

Replace a composition plate which shows any of these conditions.

Steel Plates

Wipe the plates dry and check the plates for heat discoloration. If the surfaces are smooth, even if color smear is
indicated, you can reuse the plate. If the plate is discolored with heat spots or if the surface is scuffed, replace
the plate.

Causes of Burned Clutch Plates

The following conditions can result in a burned clutch plate:

l Incorrect usage of clutch or apply plates

l Engine coolant or water in the transmission fluid
l A cracked clutch piston
l Damaged or missing seals
l Low line pressure
l Valve body conditions
¡ The valve body face is not flat.

¡ Porosity is between channels.

¡ The valve bushing clips are improperly installed.

¡ The check balls are misplaced.

l The Teflon® seal rings are worn or damaged.

ENGINE COOLANT/WATER IN TRANSMISSION

NOTE: The antifreeze or water will deteriorate the seals, gaskets and the glue that
bonds the clutch material to the pressure plate. Both conditions may cause
damage to the transmission.

If antifreeze or water has entered the transmission, perform the following:

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1. Disassemble the transmission.

2. Replace all of the rubber type seals. The coolant will attack the seal material which will cause leakage.
3. Replace the composition-faced clutch plate assemblies. The facing material may separate from the steel
center portion.
4. Replace all of the nylon parts - washers.
5. Replace the torque converter.
6. Thoroughly clean and rebuild the transmission, using new gaskets and oil filter.
7. Flush the cooler lines after the transmission cooler has been properly repaired or replaced.

FLUID LEAK DIAGNOSIS

General Method

1. Verify that the leak is transmission fluid.

2. Thoroughly clean the suspected leak area.
3. Operate the vehicle for 24 km (15 mi), or until normal operating temperatures are reached.
4. Park the vehicle over clean paper or cardboard.
5. Shut OFF the engine.
6. Look for fluid spots on the paper.
7. Make the necessary repairs.

Powder Method

1. Thoroughly clean the suspected leak area with solvent.

2. Apply an aerosol type powder, such as foot powder, to the suspected leak area.
3. Operate the vehicle for 24 km (15 mi), or until normal operating temperatures are reached.
4. Shut OFF the engine.
5. Inspect the suspected leak area.
6. Trace the leak path through the powder in order to find the source of the leak.
7. Make the necessary repairs.

Dye and Black Light Method

A fluid dye and black light kit is available from various tool manufacturers.

1. Follow the manufacturer's instructions in order to determine the amount of dye to use.
2. Detect the leak with the black light.
3. Make the necessary repairs.

Find the Cause of the Leak

Pinpoint the leak and trace the leak back to the source. You must determine the cause of the leak in order to

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repair the leak properly. For example, if you replace a gasket, but the sealing flange is bent, the new gasket will
not repair the leak. You must also repair the bent flange. Before you attempt to repair a leak, check for the
following conditions, and make repairs as necessary:

Gaskets

l Fluid level/pressure is too high

l Plugged vent or drain back holes
l Improperly tightened fasteners
l Dirty or damaged threads
l Warped flanges or sealing surface
l Scratches, burrs, or other damage to the sealing surface
l Damaged or worn gasket
l Cracking or porosity of the component
l Improper sealant used, where applicable
l Incorrect gasket

Seals

l Fluid level/pressure is too high

l Plugged vent or drain back holes
l Damaged seal bore
l Damaged or worn seal
l Improper installation
l Cracks in component
l Manual or output shaft surface is scratched, nicked, or damaged
l Loose or worn bearing causing excess seal wear

Possible Points of Fluid Leaks

Transmission Oil Pan

l Incorrectly tightened oil pan bolts

l Improperly installed or damaged oil pan gasket
l Damaged oil pan or mounting face
l Incorrect oil pan gasket

Case Leak

l Damaged vehicle speed sensor seal

l Damaged manual shaft seal
l Loose or damaged oil cooler connector fittings

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l Worn or damaged propeller shaft oil seal

l Loose line pressure pipe plug
l Porous casting warped torque converter housing

Leak at the Torque Converter End

l Converter leak in the weld area

l Converter seal lip cut. Check the converter hub for damage
l Converter seal bushing moved forward and damaged
l Converter seal garter spring missing from the seal
l Porous casting of the transmission case or the oil pump

Leak at the Vent Pipe

l Overfilled system
l Water or coolant in the fluid; The fluid will appear milky
l Transmission case porous
l Incorrect fluid level indicator
l Plugged vent
l Drain-back holes plugged
l Mispositioned oil pump to case gasket, if equipped

Leak at the Case Extension

l Output shaft seal assembly - located in the case

l Output shaft seal assembly - located in the case extension

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Fig. 38: Leak Inspection Points

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Automatic Transmission Electrical Connector Passage Sleeve
2 Line Pressure Test Hole Plug
3 Converter Housing to Case Joint
4 Trans Fluid Cooler Pipe Fitting Seals
5 Manual Shift Shaft Seal
6 Automatic Transmission Vent Pipe
7 Fluid Fill Tube Plug Assembly
8 Transmission Case Assembly
9 Output Shaft Seal Assembly - Case
10 Output Shaft Seal Assembly - Case Extension
11 A/Trans Fluid Pan Gasket
12 Torque Converter Fluid Seal Assembly
13 Torque Converter Assembly

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14 Trans Oil Level Check Plug

15 Case Extension to Case Joint

CASE POROSITY REPAIR

Some external leaks are caused by case porosity in non-pressurized areas. You can usually repair these leaks
with the transmission in the vehicle.

1. Thoroughly clean the area to be repaired with a cleaning solvent. Air dry the area.

CAUTION: Epoxy adhesive may cause skin irritations and eye damage. Read
and follow all information on the container label as provided by the
manufacturer.

2. Using instructions from the manufacturer, mix a sufficient amount of an epoxy to make the repair.
3. While the transmission case is still hot, apply the epoxy. You can use a clean, dry soldering acid brush to
clean the area and also to apply the epoxy cement. Make certain that the area to be repaired is fully
covered.
4. Allow the epoxy cement to cure for three hours before starting the engine.
5. Repeat the fluid leak diagnosis procedures.

TRANSMISSION FLUID COOLER FLUSHING AND FLOW TEST (J 45096)

GM studies indicate that plugged or restricted transmission oil coolers and pipes cause insufficient transmission
lubrication and elevated operating temperatures which can lead to premature transmission failure. Many repeat
repair cases could have been prevented by following published procedures for transmission oil cooler flushing
and flow checking. This procedure includes flow checking and flushing the auxiliary transmission oil cooler, if
equipped.

IMPORTANT: Use the J 45096 or equivalent to flush and flow test the transmission oil cooler
and the oil cooler pipes after the transaxle is removed for repairs.

Only GM Goodwrench DEXRON®VI automatic transmission fluid should be used when doing a repair on a
GM transmission.

Time allowance for performing the cooler flow checking and flushing procedure has been included in the
appropriate labor time guide operations since the 1987 model year. The service procedure steps for oil cooler
flushing and flow testing are as follows:

Cooler Flow Check and Flushing Steps

1. Machine Set-up
2. Determine Minimum Flow Rate
3. Back Flush
4. Forward Flush

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5. Flow Test
6. Code Recording Procedure
7. Clean-up

Tools Required

l J 45096 Transmission Oil Cooling System Flush and Flow Test Tool
l J 45096-30 Transmission Cooler Flush Adapter. See Special Tools.
l Shop air supply with water/oil filters, regulator and pressure gage - minimum 90 psi
l Eye protection
l Rubber gloves

Machine Set-up

Fig. 39: View Of Main Power Switch & Main Function Switch

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Courtesy of GENERAL MOTORS CORP.

1. Verify that the main power switch (1) is in the OFF position.
2. Place the main function switch (2) in the IDLE position.

Fig. 40: Connecting To 12V DC Power Source

Courtesy of GENERAL MOTORS CORP.

3. Connect J 45096 to the vehicle 12V DC power source by connecting the red battery clip to the positive,
+, battery post on the vehicle and connect the negative lead to a known good chassis ground.
4. Turn the main power switch to the ON position.

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Fig. 41: Filling Supply Tank With Transmission Fluid

Courtesy of GENERAL MOTORS CORP.

NOTE: Do not overfill the supply vessel. Damage to the unit may result. To verify
the fluid level, view the LCD screen display while filling the unit, to ensure
the fluid level does not exceed 30 L (32 qt).

5. Fill the supply tank with Dexron®VI through the fill port.
6. Reinstall and tighten the fill cap.

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Fig. 42: Applying Shop Air Supply Hose To Quick-Disconnect

Courtesy of GENERAL MOTORS CORP.

7. Connect a shop air supply hose to the quick-disconnect on the rear panel marked SUPPLY AIR.

Determine Minimum Flow Rate

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Fig. 43: Identifying Machine Display Of Automatic Transmission Fluid Temperature

Courtesy of GENERAL MOTORS CORP.

1. From the machine display, identify the temperature of the automatic transmission fluid that is stored in
the supply vessel of J 45096 .

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Fig. 44: Identifying Transmission Oil Cooler Metal Composition

Courtesy of GENERAL MOTORS CORP.

2. Determine whether the transmission oil cooler is steel or aluminum by using a magnet (1) at the cooler
flange (2) at the radiator.
3. Refer to the table below. Using the temperature from step 1, locate on either the Steel MINIMUM Flow
Rate table or the Aluminum MINIMUM Flow Rate table the minimum flow rate in gallons per minutes
(GPM). Record the minimum flow rate in GPMs and the supply fluid temperature for further reference.

Example:
l Fluid temperature: 75°F

l Cooler type: Steel

The MINIMUM flow rate for this example would be 0.8 GPM.

4. Inspect transmission oil cooler lines for damage or kinks that could cause restricted oil flow. Repair as
needed and refer to the appropriate GM service manual procedures.

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Minimum Flow Rate in Gallons Per Minute (gpm)

Temperature Range Steel Aluminum
65 - 66°F 0.6 gpm 0.5 gpm
67 - 70°F 0.7 gpm 0.6 gpm
71 - 75°F 0.8 gpm 0.7 gpm
76 - 80°F 0.9 gpm 0.8 gpm
81 - 84°F 1.0 gpm 0.9 gpm
85 - 89°F 1.1 gpm 1.0 gpm
90 - 94°F 1.2 gpm 1.1 gpm
95 - 98°F 1.3 gpm 1.2 gpm
99 - 103°F 1.4 gpm 1.3 gpm
104 - 108°F 1.5 gpm 1.4 gpm
109 - 112°F 1.6 gpm 1.5 gpm
113 - 117°F 1.7 gpm 1.6 gpm
118 - 120°F 1.8 gpm 1.7 gpm

Back Flush Procedure

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Fig. 45: Transmission Oil Cooler Supply And Return Lines

Courtesy of GENERAL MOTORS CORP.

1. Connect the J 45096-30 (1) to the vehicle transmission oil cooler supply and return lines at the
transmission. See Special Tools.

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Fig. 46: Black Supply Hose & Clear Waste Hose

Courtesy of GENERAL MOTORS CORP.

2. Connect the black supply hose (1) to the return line, top connector of the transmission, and the clear waste
hose (2) to the feed line, bottom connector of the transmission, to the vehicle cooler lines. This is the
reverse flow - backflush direction.

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Fig. 47: Setting Main Function Switch To FLUSH Position

Courtesy of GENERAL MOTORS CORP.

3. Turn the main function switch to the FLUSH position. Allow the machine to operate for 30 seconds.

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Fig. 48: Setting Main Function Switch To IDLE Position

Courtesy of GENERAL MOTORS CORP.

4. Turn the main function switch to the IDLE position and allow the supply vessel pressure to dissipate.

Forward Flush

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Fig. 49: Black Supply Hose & Clear Waste Hose

Courtesy of GENERAL MOTORS CORP.

1. Disconnect the supply and waste hoses from the vehicle cooler lines. Reverse the supply and waste hoses
to provide a normal flow direction.

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Fig. 50: Setting Main Function Switch To FLUSH Position

Courtesy of GENERAL MOTORS CORP.

2. Turn the main function switch to the FLUSH position and allow machine to operate for 30 seconds.

Flow Test

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Fig. 51: Setting Main Function Switch To FLOW Position

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: If the flow rate is less than 0.5 gpm, the LCD displays an error message.
Refer to the Troubleshooting section of the operation manual.

1. Turn the main function switch to the FLOW position and allow the oil to flow for 15 seconds. Observe
and note the flow rate; this is the TESTED flow rate.
2. Compare the TESTED flow rate to the MINIMUM flow rate information previously recorded.
l If the TESTED flow rate is equal to or greater than the MINIMUM flow rate recorded, the oil
cooling system is functioning properly. Perform Code Recording Procedure.
l If the TESTED flow rate is less than the MINIMUM flow rate previously recorded, repeat the back
flush and forward flush procedures.
3. If the TESTED flow rate is less than the MINIMUM flow rate after the second test, perform Code
Recording Procedure.

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1. Replace the transmission oil cooler.

2. Reconnect supply and waste hoses to the cooler lines in the normal flow direction. Perform Flow
Test.
3. Perform Code Recording Procedure.

Code Recording Procedure

Fig. 52: Setting Main Function Switch To CODE Position

Courtesy of GENERAL MOTORS CORP.

1. Turn the main function switch to the CODE position.

IMPORTANT: l If power is interrupted prior to the recording of the seven-character

code, the code will be lost and the flow rate test will need to be
repeated.

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l The flow test must run for a minimum of 8-10 seconds and be above
0.5 GPM for a code to be generated.

2. Record TESTED flow rate, temperature, cycle and seven-character flow code information on repair order.

Clean-up

Fig. 53: View Of Main Power Switch & Main Function Switch
Courtesy of GENERAL MOTORS CORP.

1. Turn the main function switch (2) to the IDLE position and allow the supply vessel pressure to dissipate.
2. Turn the main power switch (1) to the OFF position.

IMPORTANT: A small amount of water may drain from the bottom of the unit when the
air supply is disconnected. This is a normal operation of the built-in water

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separator.

3. Disconnect the supply and waste hoses and the 12-volt power source from the vehicle.

Fig. 54: Applying Shop Air Supply Hose To Quick-Disconnect

Courtesy of GENERAL MOTORS CORP.

4. Disconnect the air supply hose from J 45096 .

5. Dispose of the waste ATF in accordance with all applicable federal, state, and local requirements.

VIBRATION

Vibration
Checks Causes
Lug bolts for the Torque Converter Inspect for loose torque converter (1) lug bolts.

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(1)
Input Sun Gear Thrust Washer (55) Inspect for wear or damage.
Turbine Shaft Thrust Bearing
Inspect for wear or damage.
Assembly (57)
2-6 and 3-5-R Clutch Hub Thrust
Inspect the bearing for wear or damage.
Bearing Assembly (65)
l Inspect the carrier assembly for damaged pinion gears, thrush
washers, pins, and rollers.
l Inspect for a worn or damaged center support roller bearing
Output Carrier Assembly (68) assembly (485).
l Inspect for damaged thrust bearings (486, 488).
l Inspect the carrier assembly for damaged output carrier rear
sun gear thrust bearing (captured).
Output Carrier Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (69)
Output Shaft Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (71)
1-2-3-4 Clutch Hub Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (63)
Turbine Shaft Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (57)

NOISE AND VIBRATION ANALYSIS

A noise or vibration that is noticeable when the vehicle is in motion MAY NOT be the result of the
transmission.

If noise or vibration is noticeable in PARK and NEUTRAL with the engine at idle, but is less noticeable as
RPM increases, the cause may be from poor engine performance.

l Vibration may also be caused by a small amount of water inside the converter.
l Inspect the tires for the following conditions:
¡ Uneven wear

¡ Imbalance

¡ Mixed sizes

¡ Mixed radial and bias ply

l Inspect the suspension components for the following conditions:

¡ Alignment wear or damage

¡ Loose fasteners

¡ Driveline damage or wear

l Inspect the engine and transmission mounts for damage and loose bolts.
l Inspect the transmission case mounting holes for the following conditions:

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¡ Missing bolts, nuts, and studs

¡ Stripped threads

¡ Cracks

l Inspect the flywheel for the following conditions:

¡ Missing or loose bolts

¡ Cracks

¡ Imbalance

l Inspect the torque converter for the following conditions:

¡ Missing or loose bolts or lugs

¡ Missing or loose balance weights

¡ Imbalance caused by heat distortion or fluid contamination

WHINE/GROWL NOISE THAT CHANGES WITH VEHICLE SPEED

Whine/Growl Noise That Changes with Vehicle Speed

Checks Causes
2-6 and 3-5-R Clutch Hub Thrust
Inspect the bearing for wear or damage.
Bearing Assembly (65)
Output Carrier Assembly (68) l Inspect the carrier assembly for damaged pinion gears, thrust
washers, pins, and rollers.
l Inspect for a damaged center support roller bearing assembly
(485).
l Inspect for damaged thrust bearings (486, 488).

l Inspect for damaged sun gears (487, 489).

l Inspect the carrier assembly for damaged output carrier rear

sun gear thrust bearing (captured).
l Inspect for damaged or stripped splines on the output carrier
assembly.
Output Carrier Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (69)
l Inspect for damaged internal gears (495, 497).
Output Shaft Assembly (70)
l Inspect the output carrier bushing (498) for damage or wear.
Output Shaft Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (71)
Input Sun Gear Thrust Washer (55) Inspect the washer for wear or damage.
Input Sun Gear Thrust Bearing (54) Inspect the bearing for wear or damage.
Input Sun Gear (53) Inspect for spline wear or damage.
Inspect the carrier assembly for damaged pinion gears, thrust
Input Carrier Assembly (52)
washers, pins, and rollers.
1-2-3-4 Clutch Hub Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (63)

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2-6 and 3-5-R Clutch (with Output

Inspect the output carrier inner sun gear shaft bushings (60 and 62)
Carrier Outer Sun Gear Shaft) Hub
for damage or wear.
Assembly (64)
Turbine Shaft Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (57)
l Inspect for damaged or restricted fluid filter assembly (26)
Fluid Filter Assembly (26) l Inspect for damaged fluid filter seal assembly (25) or
improper sealing interface (leaks, fluid aeration).
Automatic Transmission Fluid Pump
Inspect for worn or damaged seal.
Seal (5)

NOISE IN FIRST OR REVERSE GEAR

Noise in First or Reverse Gear

Checks Causes
Center Support with 2-6 Low and l Inspect for damaged or worn low and reverse clutch plates
Reverse Clutch Assembly (67) (463-465).
l Inspect for damaged low and reverse clutch backing plate
(462). Inspect for worn splines on backing plate.
l Inspect for damaged low and reverse clutch backing plate
retaining ring (461).
l Inspect for damaged low and reverse clutch piston assembly
(470), spring (469), spring retaining ring (466), and center
support assembly (459).
l Inspect for damaged low clutch sprag assembly (467).
Holding the sprag assembly with the retaining ring facing up,
and the inner race of the sprag assembly fixed, the outer race
should freewheel counterclockwise.
l Inspect for cut, worn, or damaged low clutch sprag seal (468).

Inspect for damaged or stripped splines on the output carrier

Output Carrier Assembly (68)
assembly.

NOISE IN FIRST, SECOND, THIRD, FOURTH, FIFTH, OR REVERSE GEAR

Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear

Checks Causes
Input Carrier Assembly (52) Inspect thrust washers, pinion gears, and pins for wear or damage.
Input Sun Gear (53) Inspect for damaged sun gear.
1-2-3-4 and 3-5-R Clutch Assembly
Inspect for worn or damaged clutch bearing (428).
(51)

NOISE IN FIRST, SECOND, SIXTH, OR REVERSE GEAR

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Noise in First, Second, Sixth, or Reverse Gear

Checks Causes
Center Support with 2-6 Low and Inspect for worn or damaged output carrier outer sun gear shaft
Reverse Clutch Assembly (67) front and rear bushings (458 and 460).
Inspect for a worn or damaged center support roller bearing
Output Carrier Assembly (68)
assembly (485).

NOISE IN SECOND OR SIXTH GEAR

Noise in Second or Sixth Gear

Checks Causes
Center Support with 2-6 Low and l Inspect for damaged or worn output carrier outer sun gear
Reverse Clutch Assembly (67) shaft front bushing (458).
l Inspect for damaged or worn output carrier outer sun gear
shaft rear bushing (460).
l Inspect for damaged 2-6 clutch backing plate (451). Inspect
for worn splines on backing plate.
l Inspect for damaged 2-6 clutch backing plate retaining ring
(450).
l Inspect for damaged 2-6 clutch piston assembly (457), spring
(456), retaining ring (455), and center support assembly
(459).

NOISE DURING 3-4 OR 4-3 SHIFTS

Noise During 3-4 or 4-3 Shifts

Checks Causes
4-5-6 Clutch (with Output Carrier l Inspect hub assembly (475), dampener (476), and apply plate
Shaft and Dampener) Hub Assembly (477) for wear or damage.
(58)
l Inspect for damaged or worn 4-5-6 clutch backing plate
(432).

NOISE IN FOURTH, FIFTH, OR SIXTH GEAR

Noise in Fourth, Fifth, or Sixth Gear

Checks Causes
Input Sun Gear Thrust Washer (55) Inspect for wear or damage.
Turbine Shaft Thrust Bearing
Inspect for wear or damage.
Assembly (57)
l Inspect for damaged or worn 4-5-6 clutch backing plate
4-5-6 Clutch (with Output Carrier
(432).
Shaft and Dampener) Hub Assembly
(58) l Inspect for improper selective 4-5-6 clutch backing plate
retaining ring (431).

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

AUTOMATIC TRANSMISSION FLUID LEAKS

Automatic Transmission Fluid Leaks

Checks Causes
Torque Converter (1) Inspect for damage.
Torque Converter Housing (203) Inspect for porosity or damage.
Automatic Transmission Fluid Pump
Inspect for cut, wear, or damage.
Seal (5)

NO PARK OR DRIVE

No Park or Drive
Checks Causes
Inspect for a broken or damaged output shaft. Inspect for worn
Output Shaft Assembly (70)
splines.

HARSH GARAGE SHIFT

Harsh Garage Shift

Checks Causes
1-2-3-4 and 3-5-R Clutch Assembly Inspect for damaged or worn 1-2-3-4 clutch plates (408-410).
(51)

NO DRIVE IN ALL RANGES

No Drive in All Ranges

Checks Causes
4-5-6 (with Turbine Shaft) Clutch l Inspect for damaged or worn 4-5-6 clutch backing plate
Assembly (56) (432).
l Inspect for damaged 4-5-6 clutch (with turbine shaft) housing
assembly (441).
l Inspect the carrier assembly for damaged pinion gears, thrust
washers, pins, and rollers.
l Inspect for damaged thrust bearings (486 and 488).
Output Carrier Assembly (68)
l Inspect for damaged sun gears (487 and 489).
l Inspect the carrier assembly for damaged output carrier rear
sun gear thrust bearing (captured).
Output Carrier Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (69)
Output Shaft Assembly (70) Inspect for damaged internal gears (495 and 497).
Input Sun Gear Thrust Washer (55) Inspect the washer for wear or damage.
Input Sun Gear Thrust Bearing (54) Inspect the bearing for wear or damage.
Input Sun Gear (53) Inspect for spline wear or damage.

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Inspect carrier assembly for damaged pinion gears, thrust washers,

Input Carrier Assembly (52)
pins, and rollers.
Turbine Shaft Thrust Bearing
Inspect the bearing for wear or damage.
Assembly (57)
l Inspect for damaged or restricted fluid filter assembly (26).
Fluid Filter Assembly (26) l Inspect for damaged fluid filter seal assembly (25) or
improper sealing interface, leaks, and fluid aeration.
Automatic Transmission Fluid Pump
Inspect for worn or damaged seal.
Seal (5)

NO DRIVE OR REVERSE GEAR

No Drive or Reverse Gear

Checks Causes
4-5-6 (with Turbine Shaft) Clutch l Inspect for damaged 4-5-6 clutch (with turbine shaft) housing
Assembly (56) assembly (441).
l Inspect for damaged or distorted turbine shaft.
1-2-3-4 Clutch (with Output Carrier
Inner Sun Gear Shaft) Hub Inspect for damaged or distorted shaft on hub assembly.
Assembly (61)
2-6 and 3-5-R Clutch (with Output l Inspect for damaged or distorted shaft on hub assembly.
Carrier Outer Sun Gear Shaft) Hub l Inspect the output carrier inner sun gear shaft bushings (60
Assembly (64) and 62) for damage or wear.

NO FIRST GEAR

No First Gear
Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged low clutch sprag assembly (467).
Clutch) Support Assembly (67) Holding the sprag assembly with the retaining ring facing up,
and the inner race of the sprag assembly fixed, the outer race
should freewheel counterclockwise.
l Inspect for cut, worn, or damaged low clutch sprag seal (468).

NO FIRST AND REVERSE GEARS

No First and Reverse Gears

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged or worn low and reverse clutch plates
Clutch) Support Assembly (67) (463 and 465).
l Inspect for damaged low and reverse clutch backing plate
(462). Inspect for worn splines on backing plate.

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l Inspect for damaged low and reverse clutch backing plate

retaining ring (461).
l Inspect for damaged low and reverse clutch piston assembly
(470), spring (469), spring retaining ring (466), and center
support assembly (459).
l Inspect for damaged low clutch sprag assembly (467).
Holding the sprag assembly with the retaining ring facing up,
and the inner race of the sprag assembly fixed, the outer race
should freewheel counterclockwise.
l Inspect for cut, worn, or damaged low clutch sprag seal (468).

Inspect for damaged or stripped splines on the output carrier

Output Carrier Assembly (68)
assembly.

HARSH, SOFT, DELAYED OR SLIPPING FIRST OR REVERSE GEAR

Harsh, Soft, Delayed or Slipping First or Reverse Gear

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged or worn low and reverse clutch plates
Clutch) Support Assembly (67) (463 and 465).
l Inspect for damaged low and reverse clutch backing plate
(462). Inspect for worn splines on backing plate.
l Inspect for damaged low and reverse clutch backing plate
retaining ring (461).
l Inspect for damaged low and reverse clutch piston assembly
(470), spring (469), spring retaining ring (466), and center
support assembly (459).
l Inspect for damaged low clutch sprag assembly (467).
Holding the sprag assembly with the retaining ring facing up,
and the inner race of the sprag assembly fixed, the outer race
should freewheel counterclockwise.
l Inspect for cut, worn, or damaged low clutch sprag seal (468).

STUCK IN FIRST OR REVERSE GEAR

Stuck in First or Reverse Gear

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged or worn low and reverse clutch plates
Clutch) Support Assembly (67) (463 and 465).
l Inspect for damaged low and reverse clutch backing plate
(462). Inspect for worn splines on backing plate.
l Inspect for damaged low and reverse clutch backing plate
retaining ring (461).
l Inspect for damaged low and reverse clutch piston assembly

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

(470), spring (469), spring retaining ring (466), and center

support assembly (459).
l Inspect for damaged low clutch sprag assembly (467).
Holding the sprag assembly with the retaining ring facing up,
and the inner race of the sprag assembly fixed, the outer race
should freewheel counterclockwise.
l Inspect for cut, worn, or damaged low clutch sprag seal (468).

NO FIRST, SECOND, THIRD, AND FOURTH GEAR

No First, Second, Third, and Fourth Gear

Checks Causes
1-2-3-4 and 3-5-R Clutch Assembly l Inspect for damaged or worn 1-2-3-4 clutch plates (408-410).
(51)
l Inspect for damaged 1-2-3-4 clutch piston (414), piston
housing (417), spring (413), and dam assembly (412).
l Inspect for damaged 1-2-3-4 clutch piston dam retaining ring
(411).
l Inspect for cut, worn, or damaged 1-2-3-4 clutch piston seal
(416), inner seal (423), and housing seals (424 and 425).
l Inspect for improper selective 1-2-3-4 clutch backing plate
retaining ring (429).
l Inspect for damaged 1-2-3-4 clutch backing plate (407).
Inspect for worn splines on the backing plate.
1-2-3-4 Clutch (with Output Carrier
Inner Sun Gear Shaft) Hub Inspect for damaged splines on the hub assembly.
Assembly (61)

HARSH, SOFT, DELAYED OR SLIPPING 1-2-3-4 SHIFT

Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift

Checks Causes
1-2-3-4 and 3-5-R Clutch Assembly l Inspect for damaged or worn 1-2-3-4 clutch plates (408-410).
(51)
l Inspect for damaged 1-2-3-4 clutch piston (414), piston
housing (417), spring (413), and dam assembly (412).
l Inspect for damaged 1-2-3-4 clutch piston dam retaining ring
(411).
l Inspect for cut, worn, or damaged 1-2-3-4 clutch piston seal
(416), inner seal (423), and housing seals (424 and 425).
l Inspect for improper selective 1-2-3-4 clutch backing plate
retaining ring (429).
l Inspect for damaged 1-2-3-4 clutch backing plate (407).
Inspect for worn splines on the backing plate.

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NO FIRST, SECOND, THIRD, FOURTH, FIFTH, OR REVERSE GEAR

No First, Second, Third, Fourth, Fifth, or Reverse Gear

Checks Causes
1-2-3-4 and 3-5-R Clutch Assembly l Inspect for improper selective 3-5-R clutch backing plate
(51) retaining ring (400).
l Inspect for improper selective 1-2-3-4 clutch backing plate
retaining ring (429).
l Inspect for worn or damaged clutch bearing (428).

NO FIRST, SECOND, SIXTH, OR REVERSE GEAR

No First, Second, Sixth, or Reverse Gear

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for a damaged center support assembly (459).
Clutch) Support Assembly (67)
l Inspect for worn or damaged output carrier outer sun gear
shaft front and rear bushing (458 and 460).
Center Support Retaining Ring (66) Inspect for damage.
Inspect for a worn or damaged center support roller bearing
Output Carrier Assembly (68)
assembly (485).
2-6 and 3-5-R Clutch Hub Thrust
Inspect the bearing for wear or damage.
Bearing Assembly (65)

NO SECOND AND SIXTH GEAR

No Second and Sixth Gear

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged or worn 2-6 clutch plates (452 and 454).
Clutch) Support Assembly (67)
l Inspect for damaged 2-6 clutch backing plate (451). Inspect
for worn splines on backing plate.
l Inspect for damaged 2-6 clutch backing plate retaining ring
(450).
l Inspect for damaged 2-6 clutch piston assembly (457), spring
(456), retaining ring (455), and center support assembly
(459).

HARSH, SOFT, DELAYED OR SLIPPING SECOND OR SIXTH GEAR

Harsh, Soft, Delayed or Slipping Second or Sixth Gear

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged or worn 2-6 clutch plates (452 and 454).
Clutch) Support Assembly (67)
l Inspect for damaged 2-6 clutch backing plate (451). Inspect

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

for worn splines on backing plate.

l Inspect for damaged 2-6 clutch backing plate retaining ring
(450).
l Inspect for damaged 2-6 clutch piston assembly (457), spring
(456), retaining ring (455), and center support assembly
(459).

STUCK IN SECOND OR SIXTH GEAR

Stuck in Second or Sixth Gear

Checks Causes
Center (with 2-6 Low and Reverse l Inspect for damaged or worn 2-6 clutch plates (452 and 454).
Clutch) Support Assembly (67)
l Inspect for damaged 2-6 clutch backing plate (451). Inspect
for worn splines on backing plate.
l Inspect for damaged 2-6 clutch backing plate retaining ring
(450).
l Inspect for damaged 2-6 clutch piston assembly (457), spring
(456), retaining ring (455), and center support assembly
(459).

VIBRATION IN SECOND, THIRD, FOURTH, FIFTH, OR SIXTH GEAR

Vibration in Second, Third, Fourth, Fifth, or Sixth Gear

Checks Causes
4-5-6 Clutch (with Output Carrier Inspect hub assembly (475), dampener (476), and apply plate (477)
Shaft and Dampener) Hub Assembly for wear or damage.
(58)

NO THIRD, FIFTH, AND REVERSE GEAR

No Third, Fifth, and Reverse Gear

Checks Causes
1-2-3-4 and 3-5-R Clutch Assembly l Inspect for damaged or worn 3-5-R clutch plates (402-404).
(51)
l Inspect for damaged 3-5-R clutch piston (421), apply ring
(405), and spring (420).
l Inspect for cut, worn, or damaged 3-5-R clutch piston dam O-
ring seal (418), inner seal (419), and outer seal (422).
l Inspect for improper selective 3-5-R clutch backing plate
retaining ring (400).
l Inspect for damaged 3-5-R clutch backing plate (401).
Inspect for worn splines on the backing plate.

HARSH, SOFT, DELAYED OR SLIPPING THIRD, FIFTH, OR REVERSE GEAR

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2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear

Checks Causes
1-2-3-4 and 3-5-R Clutch Assembly l Inspect for damaged or worn 3-5-R clutch plates (402-404).
(51)
l Inspect for damaged 3-5-R clutch piston (421), apply ring
(405), and spring (420).
l Inspect for cut, worn, or damaged 3-5-R clutch piston dam O-
ring seal (418), inner seal (419), and outer seal (422).
l Inspect for improper selective 3-5-R clutch backing plate
retaining ring (400).
l Inspect for damaged 3-5-R clutch backing plate (401).
Inspect for worn splines on the backing plate.

NO FOURTH, FIFTH, AND SIXTH GEAR

No Fourth, Fifth, and Sixth Gear

Checks Causes
4-5-6 (with Turbine Shaft) Clutch Inspect for damaged or worn clutch plates (433-435).
l
Assembly (56)
l Inspect for damaged piston (439), piston dam (437), dam
retaining ring (436), and clutch spring (438).
l Inspect for improper selective 4-5-6 clutch backing plate
retaining ring (431).
l Inspect for cut, worn, or damaged turbine shaft fluid seal
rings (442).
l Inspect for damaged or distorted turbine shaft.

Control Valve Upper Body Inspect the 1/Reverse band and 4-5-6 clutch regulator valve (327)
Assembly (304) and spring (326) for wear or damage.
4-5-6 Clutch (with Output Carrier Inspect the hub assembly (475), dampener (476), and apply plate
Shaft and Dampener) Hub Assembly (477) for wear or damage.
(58)
Output Carrier Assembly (68) Inspect for damaged or stripped internal splines on the output
carrier assembly.

HARSH, SOFT, DELAYED OR SLIPPING 4-5-6 SHIFT

Harsh, Soft, Delayed or Slipping 4-5-6 Shift

Checks Causes
4-5-6 (with Turbine Shaft) Clutch l Inspect for damaged or worn clutch plates (433-435).
Assembly (56)
l Inspect for damaged piston (439), piston dam (437), dam
retaining ring (436), and clutch spring (438).
l Inspect for improper selective 4-5-6 clutch backing plate
retaining ring (431).
l Inspect for cut, worn, or damaged turbine shaft fluid seal

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 2006 Cadillac XLR
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rings (442).

NO TORQUE CONVERTER CLUTCH APPLY

No Torque Converter Clutch Apply

Checks Causes
Torque Converter Assembly (1) Diagnose torque converter for possible internal damage.
Fluid Pump Cover Assembly (219) l Inspect for worn, damaged, or sticking converter feed limit
valve (220) and spring (221).
l Inspect for worn, damaged, or sticking TCC control valve
(227) and spring (226).
l Inspect for damaged stator shaft.

Control Valve Lower Body Inspect for worn, damaged, or sticking torque converter clutch
Assembly (307) (TCC) regulator apply valve (355).
4-5-6 (with Turbine Shaft) Clutch l Inspect for damaged turbine shaft.
Assembly (56)
l Inspect for damaged turbine shaft O-ring seal.

NO TORQUE CONVERTER CLUTCH RELEASE

No Torque Converter Clutch Release

Checks Causes
Torque Converter Assembly (1) Diagnose torque converter for possible internal damage.
Fluid Pump Cover Assembly (219) l Inspect for worn, damaged, or sticking converter feed limit
valve (220) and spring (221).
l Inspect for worn, damaged, or sticking torque converter
clutch (TCC) control valve (227) and spring (226).
Control Valve Lower Body Inspect for worn, damaged, or sticking TCC regulator apply valve
Assembly (307) (355).

NO REVERSE GEAR

No Reverse Gear
Checks Causes
Control Valve Upper Body l Inspect for worn, damaged, or sticking 3-5 reverse regulator
Assembly (304) valve (336) and valve spring (326).
l Inspect for damaged or missing #5 check ball.

Control Valve Lower Body Inspect for worn, damaged, or sticking clutch select solenoid valve
Assembly (307) 3 (352) and valve spring (353).

FLUID PRESSURE HIGH OR LOW

Fluid Pressure High or Low

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 2006 Cadillac XLR
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Checks Causes
Torque Converter Housing with l Inspect for worn, sticking, or damaged pressure regulator
Fluid Pump Assembly (2) valve (233).
l Inspect for worn, sticking, or damaged pressure regulator
valve outer spring (234).
l Inspect for worn, sticking, or damaged pressure regulator
valve inner spring (235).
l Inspect for worn, sticking, or damaged isolator valve (236)
and sleeve (237).
l Inspect for worn, sticking, or damaged pressure relief ball
valve (225).
l Inspect for worn, sticking, or damaged pressure relief ball
valve spring (224).
l Inspect for damaged or porous pump cover assembly (219).
Inspect for pump surfaces not flat.
l Inspect for excessive fluid pump rotor (217) clearance or
damage. Ensure proper selective rotor is being utilized.
l Inspect for damaged fluid pump slide (212). Ensure proper
selective slide is being utilized.
l Inspect for worn, sticking, or damaged fluid pump slide outer
spring (211).
l Inspect for worn or damaged fluid pump slide seal (213), seal
support (214), pivot pin (215), fluid seal ring (209), and O-
ring seal (210).
l Inspect for worn or damaged fluid pump vane rings (207) and
rotor guide (208).
l Inspect for worn, sticking, or damaged actuator feed limit
Control Valve Upper Body valve (325) and spring (324).
Assembly (321) l Inspect for worn, sticking, or damaged clutch boost valve
(329) and spring (330).
l Inspect for damaged or restricted fluid filter assembly (26).
Fluid Filter Assembly (26)
l Inspect for damaged fluid filter seal assembly (25).

REPAIR INSTRUCTIONS
AUTOMATIC TRANSMISSION CONTROL REPLACEMENT

Removal Procedure

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 55: Shift Control Cable Assembly

Courtesy of GENERAL MOTORS CORP.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the intermediate exhaust pipe. Refer to Intermediate Pipe Replacement in Engine Exhaust.
3. Remove the driveline tunnel closeout panel. Refer to Driveline Tunnel Closeout Panel Replacement in
Propeller Shaft.
4. Disconnect the shift control cable from the floor shift control ball stud 3.
5. Lower the vehicle.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 56: Shift Control Assembly And Nuts

Courtesy of GENERAL MOTORS CORP.

6. Remove the shift control trim plate. Refer to Console Trim Plate Replacement in Instrument Panel,
Gages and Console.
7. Remove the center console assembly. Refer to Console Replacement in Instrument Panel, Gages and
Console.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

8. Remove the electrical connector from the shift control assembly.

Fig. 57: Shift Lock Control Pigtail Connector & Wiring Harness Connector
Courtesy of GENERAL MOTORS CORP.

9. Disconnect the wiring harness connector 1 from the shift lock control pigtail connector 2.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 58: Shift Control Assembly And Nuts

Courtesy of GENERAL MOTORS CORP.

10. Remove the nuts 3 securing the shift control assembly 1 to the tunnel reinforcement.
11. Remove the shift control assembly from the tunnel reinforcement.

Installation Procedure

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 59: Shift Control Assembly And Nuts

Courtesy of GENERAL MOTORS CORP.

1. Install the shift control assembly to the tunnel reinforcement.

NOTE: Refer to Fastener Notice in Cautions and Notices.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

2. Install the nuts securing the shift control assembly to the tunnel reinforcement.

Tighten: Tighten the nuts to 12 N.m (106 lb in).

3. Connect the wiring harness connector to the shift lock control pigtail connector.

Fig. 60: Shift Lock Control Pigtail Connector & Wiring Harness Connector
Courtesy of GENERAL MOTORS CORP.

4. Install the electrical connector (1) to the shift control assembly.

5. Install the center console assembly. Refer to Console Replacement in Instrument Panel, Gages, and
Console
6. Install the shift control trim plate. Refer to Console Trim Plate Replacement in Instrument Panel,
Gages, and Console.

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

7. Place the shifter in the NEUTRAL position.

8. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

Fig. 61: Shift Control Cable Assembly

Courtesy of GENERAL MOTORS CORP.

9. Connect the shift lock control cable 3. Refer to Automatic Transmission Control Replacement .
10. Install the driveline tunnel closeout panel. Refer to Driveline Tunnel Closeout Panel Replacement in
Propeller Shaft.
11. Install the intermediate exhaust pipe. Refer to Intermediate Pipe Replacement in Engine Exhaust.
12. With the shifter and the transmission in the NEUTRAL position, adjust the shifter cable. Refer to Shift
Control Linkage Adjustment .
13. Lower the vehicle.

AUTOMATIC TRANSMISSION RANGE SELECTOR LEVER CABLE REPLACEMENT

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Removal Procedure

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Shift the floor shift control to NEUTRAL.

If replacing a damaged cable, be sure that BOTH the floor shift control and the transmission are in
NEUTRAL.

3. Remove the driveline tunnel closeout panel.

Fig. 62: Releasing The Shift Control Cable End Clip

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Use care to not suddenly jerk the shift control cable during disassembly,
the shift control cable rod end guide tubes are EXTREMELY INFLEXIBLE
and capable of only a SLIGHT bend.

4. Using a large flat bladed screwdriver, CAREFULLY release the shift control cable end clip (1) from the
floor shift control arm stud.
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 2006 Cadillac XLR
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5. Remove the shift control cable (2) from the driveline tunnel bracket.
1. Using a flat bladed screwdriver, pry the cable retaining staple clip from the cable.
2. Depress the cable retaining tabs.
3. While depressing the tabs, push the tabs through the hole in the driveline tunnel bracket.
4. Slide the cable out of the bracket slot.

Fig. 63: Releasing The Shift Control Cable End Clip

Courtesy of GENERAL MOTORS CORP.

6. CAREFULLY release the shift control cable end clip (1) from the transmission shift lever stud.
7. Remove the shift control cable (3) from the shift control cable bracket.
1. Using a flat bladed screwdriver, pry the shift cable retaining staple clip (2) from the cable.
2. Depress the shift cable retaining tabs.
3. While depressing the tabs, push the tabs through the hole in the shift cable bracket.
4. Slide the cable out of the bracket slot.

Installation Procedure

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 2006 Cadillac XLR
2006 TRANSMISSION Automatic Transmission - 6L80E - XLR

Fig. 64: Installing The Shift Control Cable

Courtesy of GENERAL MOTORS CORP.

1. Position and install the shift control cable (2) to the driveline tunnel bracket.
1. Slide the smaller diameter portion of the shift cable into the slot in the driveline tunnel bracket.
2. Push the shift cable retaining tabs through the hole in the bracket to lock the cable in place.
3. Insert the shift cable retaining staple clip between the shift cable retaining tabs.

Press the staple clip firmly to secure.

2. CAREFULLY secure the shift control cable end (1) to the floor shift control arm stud.

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Fig. 65: Installing The Shift Control Cable

Courtesy of GENERAL MOTORS CORP.

3. Install the shift control cable (3) to the shift control cable bracket.
1. Slide the smaller diameter portion of the cable into the slot in the shift cable bracket.
2. Push the tabs through the hole in the bracket to lock the cable in place.
3. Insert the shift cable retaining staple clip (2) between the shift cable retaining tabs.

Press the staple clip (2) firmly to secure.

4. CAREFULLY secure the shift control cable end clip (1) to the transmission shift lever stud.
5. If installing a NEW transmission shift control cable, remove the shipping guard from the adjuster lock.

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Fig. 66: Depressing The Shift Control Cable Adjuster Lock

Courtesy of GENERAL MOTORS CORP.

6. If installing a NEW transmission shift control cable, depress the shift control cable adjuster lock.
7. Lower the vehicle. Leave the vehicle on the hoist.
8. Verify that the shift control cable is operating smoothly:
1. Firmly apply the parking brake.
2. Turn the ignition switch to ON; DO NOT start the engine.
3. Apply the regular brakes.
4. Shift from NEUTRAL to FIRST, then shift from FIRST to SECOND, then DRIVE and so on;
pause for 1 second in each detent position.

Take note of an audible sound from the transmission shift lever each time a shift detent is selected.

5. Shift from PARK directly to FIRST.

6. Repeat steps 13.4 and 13.5 an additional 2 times.

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7. If any binding is felt during this check, or if no audible sound was produced from the transmission
shift lever, inspect the shift control cable for damage (at either end of the cable).
8. Shift the floor shift control into PARK.
9. Release the regular brakes.
10. Turn the ignition switch OFF.
11. Release the parking brake.
9. Raise and support the vehicle.
10. Install the driveline tunnel closeout panel.

CAUTION: Refer to Road Test Caution.

11. Test drive the vehicle in an area with little traffic; ensure that the transmission will shift smoothly into,
and maintain each detent position.

AUTOMATIC TRANSMISSION RANGE SELECTOR LEVER CABLE BRACKET REPLACEMENT

Fig. 67: Replacing Automatic Transmission Range Selector Cable Bracket

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Range Selector Lever Cable Bracket Replacement

Callout Component Name
NOTE:

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Refer to Fastener Notice .

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

Preliminary Procedures

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the range select cable from the range selector cable bracket. Refer to Automatic
Transmission Range Selector Lever Cable Replacement.
Range Selector Cable Bracket Nuts (Qty: 2)
1
Tighten: 20 N.m (15 lb ft)
2 Range Selector Cable Bracket

AUTOMATIC TRANSMISSION RANGE SELECTOR LEVER REPLACEMENT

Fig. 68: Replacing Automatic Transmission Range Selector Cable Lever

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Range Selector Lever Replacement

Callout Component Name
NOTE:
Refer to Fastener Notice .

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

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Preliminary Procedures

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the range select cable from the range selector lever. Refer to Automatic Transmission
Range Selector Lever Cable Replacement.
Range Selector Lever Nut
1
Tighten: 20 N.m (15 lb ft)
2 Range Selector Lever

TRANSMISSION FLUID AUXILIARY COOLER REPLACEMENT

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .

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Fig. 69: Auxiliary Transmission Oil Cooler

Courtesy of GENERAL MOTORS CORP.

3. Disconnect the auxiliary lower transmission line to the auxiliary transmission oil cooler (TOC). Refer to
Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
4. Remove the lower TOC line from the auxiliary TOC.

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Fig. 70: Auxiliary TOC Line

Courtesy of GENERAL MOTORS CORP.

5. Disconnect the radiator to auxiliary TOC line from the auxiliary TOC. Refer to Transmission Fluid
Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
6. Remove the radiator to TOC line from the auxiliary TOC.

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Fig. 71: Auxiliary TOC Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

7. Remove the auxiliary TOC retaining bolts.

8. Remove the auxiliary TOC from the vehicle.

Installation Procedure

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Fig. 72: Auxiliary TOC Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

1. Install the auxiliary TOC to the vehicle.

Tighten: Tighten the bolts to 25 N.m (18 lb ft).

2. Install the auxiliary TOC retaining bolts.

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Fig. 73: Auxiliary TOC Line

Courtesy of GENERAL MOTORS CORP.

3. Install the radiator to TOC line to the auxiliary TOC.

4. Connect the radiator to TOC line to the auxiliary TOC. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .

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Fig. 74: Auxiliary Transmission Oil Cooler

Courtesy of GENERAL MOTORS CORP.

5. Install the lower TOC line to the auxiliary TOC.

6. Connect the lower TOC line to the auxiliary TOC. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .
7. Install the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .
8. Lower the vehicle.
9. Fill the transmission fluid. Refer to Transmission Fluid Fill Procedure.

TRANSMISSION FLUID COOLER HOSE/PIPE QUICK-CONNECT FITTING DISCONNECTION

AND CONNECTION

Removal Procedure

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Fig. 75: Installing J 41623-B Onto Generator Cooling Inlet Pipe

Courtesy of GENERAL MOTORS CORP.

1. Install the J 41623-B onto the transmission oil cooler (TOC) pipe.

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Fig. 76: Sliding J 41623-B Toward Generator Cooling Inlet Pipe Fitting
Courtesy of GENERAL MOTORS CORP.

2. Slide the J 41623-B toward the TOC pipe fitting.

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Fig. 77: Rotating J 41623-B On Coolant Pipe

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Rotate the J 41623-B to engage the TOC pipe fitting's retainer slots.
The J 41623-B should be nearly flush with the fitting.

3. Connect the J 41623-B onto the TOC pipe fitting.

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Fig. 78: Rotating J 41623-B Until Retainer Clip Rises Above Fitting Retainer Seat
Courtesy of GENERAL MOTORS CORP.

4. Rotate the J 41623-B until the retainer clip (1) rises above the fitting retainer seat.

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Fig. 79: Removing J 41623-B From Generator Cooling Inlet Pipe

Courtesy of GENERAL MOTORS CORP.

5. Pull back on the TOC pipe to disengage the pipe from the TOC pipe fitting.
6. Remove the J 41623-B from the TOC pipe.

Installation Procedure

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Fig. 80: Installing Generator Cooling Inlet Pipe Into Generator Cooling Inlet Pipe Fitting
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Inspect the TOC pipe fitting and retaining clip for signs of wear or
damage. Replace the components if necessary.

1. Install the TOC pipe into the TOC pipe fitting.

A distinct snap should be heard or felt when assembling the TOC pipe to the fitting.

2. To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.

TRANSMISSION FLUID COOLER HOSE/PIPE CONNECTOR REPLACEMENT (LOWER

RADIATOR)

Removal Procedure

IMPORTANT: The transmission oil cooler in held into position inside the radiator by the

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TOC fittings.
Service one TOC fitting at a time. Removal of both TOC fittings will cause
the cooler tank to fall out of position and require radiator removal to
install the TOC fittings.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Position a drain pan under the vehicle.
3. Disengage the plastic cap from the TOC fitting.

Pull the plastic cap back along the pipe.

4. Disconnect the TOC line from the TOC fitting. Refer to Transmission Fluid Cooler Hose/Pipe Quick-
Connect Fitting Disconnection and Connection .

Fig. 81: TOC Fitting & Radiator (Lower Radiator)

Courtesy of GENERAL MOTORS CORP.

5. Remove the TOC fitting from the radiator.

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Installation Procedure

Fig. 82: TOC Fitting & Radiator (Lower Radiator)

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

1. Install the TOC fitting to the radiator.

Tighten: Tighten the fitting to 18 N.m (13 lb ft).

2. Connect the TOC line to the TOC fitting. Refer to Transmission Fluid Cooler Hose/Pipe Quick-
Connect Fitting Disconnection and Connection .

IMPORTANT: Ensure the cooler line being installed has a plastic cap on the end that
connects to the quick connect fitting. If no plastic cap exists, or the
plastic cap is damaged, obtain a new cap. Install the cap on to the cooler
line prior to cooler line installation.

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Do not manually depress the retaining clip when installing the plastic cap.

3. Snap the plastic cap onto the TOC fitting.

4. Ensure that the plastic cap is fully seated against the fitting.

Fig. 83: Checking For Gap Between Cap & Fitting

Courtesy of GENERAL MOTORS CORP.

5. Ensure that no gap is present between the cap and the fitting.
6. Remove the drain pan from under the vehicle.
7. Lower the vehicle.
8. Inspect the fluid level and add fluid if necessary. Refer to Transmission Fluid Check .

TRANSMISSION FLUID COOLER HOSE/PIPE CONNECTOR REPLACEMENT (UPPER

RADIATOR)

Removal Procedure

1. Remove the radiator support. Refer to Radiator Support Replacement in Engine Cooling.

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IMPORTANT: The transmission oil cooler in held into position inside the radiator by the
TOC fittings.
Service one TOC fitting at a time. Removal of both TOC fittings will cause
the cooler tank to fall out of position and require radiator removal to
install the TOC fittings.

2. Disengage the plastic cap from the TOC fitting.

Pull the plastic cap back along the pipe.

3. Disconnect the TOC line from the TOC fitting. Refer to Transmission Fluid Cooler Hose/Pipe Quick-
Connect Fitting Disconnection and Connection .

Fig. 84: TOC Fitting & Radiator (Upper Radiator)

Courtesy of GENERAL MOTORS CORP.

4. Remove the TOC fitting from the radiator.

Installation Procedure

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Fig. 85: TOC Fitting & Radiator (Upper Radiator)

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

1. Install the TOC fitting to the radiator.

Tighten: Tighten the fitting to 18 N.m (13 lb ft).

2. Connect the TOC line to the TOC fitting. Refer to Transmission Fluid Cooler Hose/Pipe Quick-
Connect Fitting Disconnection and Connection .

IMPORTANT: Ensure the cooler line being installed has a plastic cap on the end that
connects to the quick connect fitting. If no plastic cap exists, or the
plastic cap is damaged, obtain a new cap. Install the cap on to the cooler
line prior to cooler line installation.
Do not manually depress the retaining clip when installing the plastic cap.

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3. Snap the plastic cap onto the TOC fitting.

4. Ensure that the plastic cap is fully seated against the fitting.

Fig. 86: Checking For Gap Between Cap & Fitting

Courtesy of GENERAL MOTORS CORP.

5. Ensure that no gap is present between the cap and the fitting.
6. Install the radiator support. Refer to Radiator Support Replacement in Engine Cooling.
7. Inspect the fluid level and add fluid if necessary. Refer to Transmission Fluid Check .

TRANSMISSION FLUID COOLER PIPE REPLACEMENT - REAR

Removal Procedure

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the driveline tunnel closeout panel. Refer to Driveline Tunnel Closeout Panel Replacement in
Propeller Shaft.

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Fig. 87: TOC Inlet & Outlet Lines

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: l The front transmission oil cooler (TOC) inlet and outlet lines connect
to the rear TOC inlet and outlet lines near the engine starter motor.
l Cap or plug the open TOC pipes immediately to prevent system
contamination.

3. Disconnect the front transmission oil cooler (TOC) inlet and outlet lines from the rear TOC inlet and
outlet lines. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and
Connection .

Cap or plug the open TOC pipes.

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Fig. 88: TOC Block Fitting Bolt

Courtesy of GENERAL MOTORS CORP.

4. Remove the TOC block fitting bolt from the transmission housing.
5. Rotate the TOC block fitting to unsecure the upper TOC pipe.
6. Disconnect the upper and lower TOC pipes from the transmission.

Cap or plug the TOC pipes and transmission fittings to prevent system contamination.

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Fig. 89: Forward TOC Pipe Bracket Bolt

Courtesy of GENERAL MOTORS CORP.

7. Remove the forward TOC pipe bracket bolt.

8. Remove the forward TOC pipe bracket.

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Fig. 90: Rear TOC Pipe Bracket Bolt

Courtesy of GENERAL MOTORS CORP.

9. Remove the rear TOC pipe bracket bolt.

10. Remove the rear TOC pipe bracket.
11. Remove the TOC pipes from the vehicle.

Installation Procedure

1. Install the TOC pipes into position.

2. Install the rear TOC pipe bracket.

NOTE: Refer to Fastener Notice .

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Fig. 91: Rear TOC Pipe Bracket Bolt

Courtesy of GENERAL MOTORS CORP.

3. Install the rear TOC pipe bracket bolt.

Tighten: Tighten the bolt to 12 N.m(9 lb ft).

4. Install the forward TOC pipe bracket.

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Fig. 92: Forward TOC Pipe Bracket Bolt

Courtesy of GENERAL MOTORS CORP.

5. Install the forward TOC pipe bracket bolt.

Tighten: Tighten the bolt to 12 N.m(9 lb ft).

6. Remove caps or plugs from the TOC pipes and transmission fittings.
7. Connect the upper and lower TOC pipes to the transmission.
8. Rotate the TOC block fitting to secure the upper TOC pipe.

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Fig. 93: TOC Block Fitting Bolt

Courtesy of GENERAL MOTORS CORP.

9. Install the TOC block fitting bolt to the transmission housing.

Tighten: Tighten the bolt to 25 N.m(18 lb ft).

10. Remove the caps or plugs from the TOC pipes.

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Fig. 94: TOC Inlet & Outlet Lines

Courtesy of GENERAL MOTORS CORP.

11. Connect the front TOC inlet and outlet lines to the rear TOC inlet and outlet lines. Refer to Transmission
Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
12. Install the driveline tunnel closeout panel. Refer to Driveline Tunnel Closeout Panel Replacement in
Propeller Shaft.
13. Lower the vehicle.
14. Check the transmission fluid level, add fluid if necessary. Refer to Transmission Fluid Check .

TRANSMISSION FLUID COOLER UPPER PIPE ASSEMBLY REPLACEMENT

Removal Procedure

1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Remove the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .

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Fig. 95: Lower Transmission Oil Cooler Line

Courtesy of GENERAL MOTORS CORP.

4. Disconnect the lower transmission oil cooler (TOC) line from the radiator. Refer to Transmission Fluid
Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
5. Remove the lower TOC line from the radiator.
6. Remove the A/C compressor. Refer to Compressor Replacement .

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Fig. 96: Lower TOC Line From Auxiliary TOC

Courtesy of GENERAL MOTORS CORP.

7. Disconnect the lower TOC line from the auxiliary TOC. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .
8. Remove the lower TOC line from the auxiliary TOC.

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Fig. 97: Removing Accessory Drive Belt Tensioner Damper Bolts

Courtesy of GENERAL MOTORS CORP.

9. Remove the accessory belt tensioner top bolt (1).

10. Remove the accessory belt tensioner lower bolt (2).
11. Remove the accessory belt tensioner.

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Fig. 98: Installing Air Conditioning/Power Steering Bracket

Courtesy of GENERAL MOTORS CORP.

12. Remove the A/C compressor and power steering pump bracket bolts.
13. Remove the A/C compressor and power steering pump bracket.
14. Raise the engine cradle back into position.

IMPORTANT: It is not necessary to fully tighten the cradle nuts to specification at this
time. They will be removed again at a later step. Tighten until the cradle
mounting nuts contacts the engine cradle.

15. Install the RH cradle mounting nuts.

16. Remove the support jacks from beneath the vehicle.
17. Lower the vehicle.
18. Install the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical - 4.4L.
19. Raise the vehicle approximately 0.61 m (2.0 ft) off the ground.
20. Support the engine cradle with a jack stands.

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Fig. 99: View Of Front & Rear Crossmember Nuts

Courtesy of GENERAL MOTORS CORP.

21. Remove the RH cradle mounting nuts.

22. Lower the RH engine cradle assembly approximately 0.375 in (51.0 mm)

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Fig. 100: View Of Right Engine Mount, Bracket & Nut

Courtesy of GENERAL MOTORS CORP.

23. Remove the RH engine mount upper nut.

24. Remove the RH engine mount lower nut

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Fig. 101: View Of Right Engine Mount Bracket & Bolts

Courtesy of GENERAL MOTORS CORP.

25. Remove the RH engine mount bracket bolts.

IMPORTANT: It is necessary to elevate the engine assembly slightly to allow clearance

for the RH engine mount bracket removal.

26. Using the J 28467-B , raise the engine assembly approximately 0.75 in (19.0 mm) to remove RH engine
mount bracket
27. Remove the RH engine mount bracket.

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Fig. 102: View Of Engine Mount Heat Shield

Courtesy of GENERAL MOTORS CORP.

28. Remove the RH engine mount heat shield from the engine mount.
29. Remove the RH engine mount.
30. Raise and support the vehicle.
31. Remove the TOC line to oil pan retaining nuts.
32. Remove the TOC line to oil pan retaining clips.

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33. Disconnect the upper and lower TOC retainer clip.

Fig. 103: TOC Inlet & Outlet Lines

Courtesy of GENERAL MOTORS CORP.

34. Disconnect the front TOC lines from the rear TOC line set. Refer to Transmission Fluid Cooler
Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
35. Disconnect the oil level sensor electrical connector.

IMPORTANT: Note the position of the TOC lines to ensure proper installation.

36. Remove the TOC lines.

Installation Procedure

1. Install the TOC lines.

2. Connect the oil level sensor electrical connector.

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Fig. 104: TOC Inlet & Outlet Lines

Courtesy of GENERAL MOTORS CORP.

3. Connect the front TOC lines to the rear TOC line set. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .
4. Connect the upper and lower TOC retainer clip.
5. Install the TOC line to oil pan retaining clips.

NOTE: Refer to Fastener Notice .

6. Install the TOC line to oil pan retaining nuts.

Tighten: Tighten the nuts to 12 N.m (9 lb ft).

7. Lower the vehicle.

IMPORTANT: When installing the engine mount, be sure to have the locating dowel in
the correct position.

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8. Install the RH engine mount.

Fig. 105: View Of Engine Mount Heat Shield

Courtesy of GENERAL MOTORS CORP.

9. Install the RH engine mount heat shield to the engine mount.

10. Install the RH engine mount bracket.

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Fig. 106: View Of Right Engine Mount Bracket & Bolts

Courtesy of GENERAL MOTORS CORP.

11. Install the RH engine mount bracket bolts.

Tighten: Tighten the bolts to 58 N.m (43 lb ft).

12. Using the J 28467-B , lower the engine assembly into position.
13. Install the RH engine mount lower nut

Tighten: Tighten the nut to 58 N.m (43 lb ft).

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Fig. 107: View Of Right Engine Mount, Bracket & Nut

Courtesy of GENERAL MOTORS CORP.

14. Install the RH engine mount upper nut.

Tighten: Tighten the nut to 58 N.m (43 lb ft).

15. Install the A/C compressor and power steering pump bracket.

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Fig. 108: Installing Air Conditioning/Power Steering Bracket

Courtesy of GENERAL MOTORS CORP.

16. Install the A/C compressor and power steering pump bracket bolts.

Tighten: Tighten the bolts to 50 N.m (37 lb ft).

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Fig. 109: Removing Accessory Drive Belt Tensioner Damper Bolts

Courtesy of GENERAL MOTORS CORP.

17. Install the accessory belt tensioner.

18. Install the accessory belt tensioner lower bolt (2).

Tighten: Tighten the bolt to 25 N.m (18 lb ft).

19. Install the accessory belt tensioner top bolt (1).

Tighten: Tighten the bolt to 25 N.m (18 lb ft).

20. Install the A/C compressor. Refer to Compressor Replacement .

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Fig. 110: Lower TOC Line From Auxiliary TOC

Courtesy of GENERAL MOTORS CORP.

21. Install the lower TOC line to the auxiliary TOC.

22. Connect the lower TOC line to the auxiliary TOC. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .

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Fig. 111: Lower TOC Line To Radiator

Courtesy of GENERAL MOTORS CORP.

23. Install the lower TOC line to the radiator.

24. Connect the lower TOC line to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-
Connect Fitting Disconnection and Connection .
25. Install the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .
26. Lower the vehicle.
27. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
28. Check the transmission fluid level, add if necessary. Refer to Transmission Fluid Fill Procedure.

TRANSMISSION FLUID COOLER LOWER PIPE ASSEMBLY REPLACEMENT - TRANSMISSION

TO AUXILIARY COOLER

Removal Procedure

1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Remove the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .

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Fig. 112: Lower TOC Line To Radiator

Courtesy of GENERAL MOTORS CORP.

4. Disconnect the lower transmission oil cooler (TOC) line from the radiator. Refer to Transmission Fluid
Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
5. Remove the lower TOC line from the radiator.
6. Remove the A/C compressor. Refer to Compressor Replacement .

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Fig. 113: Lower TOC Line From Auxiliary TOC

Courtesy of GENERAL MOTORS CORP.

7. Disconnect the lower TOC line from the auxiliary TOC. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .
8. Remove the lower TOC line from the auxiliary TOC.

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Fig. 114: Removing Accessory Drive Belt Tensioner Damper Bolts

Courtesy of GENERAL MOTORS CORP.

9. Remove the accessory belt tensioner top bolt (1).

10. Remove the accessory belt tensioner lower bolt (2).
11. Remove the accessory belt tensioner.

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Fig. 115: Installing Air Conditioning/Power Steering Bracket

Courtesy of GENERAL MOTORS CORP.

12. Remove the A/C compressor and power steering pump bracket bolts.
13. Remove the A/C compressor and power steering pump bracket.
14. Raise the engine cradle back into position.

IMPORTANT: It is not necessary to fully tighten the cradle nuts to specification at this
time. They will be removed again at a later step. Tighten until the cradle
mounting nuts contacts the engine cradle.

15. Install the RH cradle mounting nuts.

16. Remove the support jacks from beneath the vehicle.
17. Lower the vehicle.
18. Install the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical - 4.4L.
19. Raise the vehicle approximately 0.61 m (2.0 ft) off the ground.
20. Support the engine cradle with a jack stands.

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Fig. 116: View Of Front & Rear Crossmember Nuts

Courtesy of GENERAL MOTORS CORP.

21. Remove the RH cradle mounting nuts.

22. Lower the RH engine cradle assembly approximately 0.375 in (51.0 mm)

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Fig. 117: View Of Right Engine Mount, Bracket & Nut

Courtesy of GENERAL MOTORS CORP.

23. Remove the RH engine mount upper nut.

24. Remove the RH engine mount lower nut

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Fig. 118: View Of Right Engine Mount Bracket & Bolts

Courtesy of GENERAL MOTORS CORP.

25. Remove the RH engine mount bracket bolts.

IMPORTANT: It is necessary to elevate the engine assembly slightly to allow clearance

for the RH engine mount bracket removal.

26. Using the J 28467-B , raise the engine assembly approximately 0.75 in (19.0 mm) to remove RH engine
mount bracket
27. Remove the RH engine mount bracket.

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Fig. 119: View Of Engine Mount Heat Shield

Courtesy of GENERAL MOTORS CORP.

28. Remove the RH engine mount heat shield from the engine mount.
29. Remove the RH engine mount.
30. Raise and support the vehicle.
31. Remove the TOC line to oil pan retaining nuts.
32. Remove the TOC line to oil pan retaining clips.

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33. Disconnect the upper and lower TOC retainer clip.

Fig. 120: TOC Inlet & Outlet Lines

Courtesy of GENERAL MOTORS CORP.

34. Disconnect the front TOC lines from the rear TOC line set. Refer to Transmission Fluid Cooler
Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
35. Disconnect the oil level sensor electrical connector.

IMPORTANT: Note the position of the TOC lines to ensure proper installation.

36. Remove the TOC lines.

Installation Procedure

1. Install the TOC lines.

2. Connect the oil level sensor electrical connector.

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Fig. 121: TOC Inlet & Outlet Lines

Courtesy of GENERAL MOTORS CORP.

3. Connect the front TOC lines to the rear TOC line set. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .
4. Connect the upper and lower TOC retainer clip.
5. Install the TOC line to oil pan retaining clips.

NOTE: Refer to Fastener Notice .

6. Install the TOC line to oil pan retaining nuts.

Tighten: Tighten the nuts to 12 N.m (9 lb ft).

7. Lower the vehicle.

IMPORTANT: When installing the engine mount, be sure to have the locating dowel in
the correct position.

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8. Install the RH engine mount.

Fig. 122: View Of Engine Mount Heat Shield

Courtesy of GENERAL MOTORS CORP.

9. Install the RH engine mount heat shield to the engine mount.

10. Install the RH engine mount bracket.

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Fig. 123: View Of Right Engine Mount Bracket & Bolts

Courtesy of GENERAL MOTORS CORP.

11. Install the RH engine mount bracket bolts.

Tighten: Tighten the bolts to 58 N.m (43 lb ft).

12. Using the J 28467-B , lower the engine assembly into position.
13. Install the RH engine mount lower nut

Tighten: Tighten the nut to 58 N.m (43 lb ft).

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Fig. 124: View Of Right Engine Mount, Bracket & Nut

Courtesy of GENERAL MOTORS CORP.

14. Install the RH engine mount upper nut.

Tighten: Tighten the nut to 58 N.m (43 lb ft).

15. Install the A/C compressor and power steering pump bracket.

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Fig. 125: Installing Air Conditioning/Power Steering Bracket

Courtesy of GENERAL MOTORS CORP.

16. Install the A/C compressor and power steering pump bracket bolts.

Tighten: Tighten the bolts to 50 N.m (37 lb ft).

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Fig. 126: Removing Accessory Drive Belt Tensioner Damper Bolts

Courtesy of GENERAL MOTORS CORP.

17. Install the accessory belt tensioner.

18. Install the accessory belt tensioner lower bolt (2).

Tighten: Tighten the bolt to 25 N.m (18 lb ft).

19. Install the accessory belt tensioner top bolt (1).

Tighten: Tighten the bolt to 25 N.m (18 lb ft).

20. Install the A/C compressor. Refer to Compressor Replacement .

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Fig. 127: TOC Line To Auxiliary TOC

Courtesy of GENERAL MOTORS CORP.

21. Install the lower TOC line to the auxiliary TOC.

22. Connect the lower TOC line to the auxiliary TOC. Refer to Transmission Fluid Cooler Hose/Pipe
Quick-Connect Fitting Disconnection and Connection .

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Fig. 128: TOC Line To Radiator

Courtesy of GENERAL MOTORS CORP.

23. Install the lower TOC line to the radiator.

24. Connect the lower TOC line to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-
Connect Fitting Disconnection and Connection .
25. Install the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .
26. Lower the vehicle.
27. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
28. Check the transmission fluid level, add if necessary. Refer to Transmission Fluid Fill Procedure.

TRANSMISSION FLUID COOLER LOWER PIPE ASSEMBLY REPLACEMENT - AUXILIARY

COOLER TO RADIATOR

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .

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Fig. 129: Radiator To Auxiliary TOC Line From Auxiliary TOC

Courtesy of GENERAL MOTORS CORP.

3. Disconnect the radiator to auxiliary transmission oil cooler (TOC) line from the auxiliary TOC. Refer to
Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
4. Remove the radiator to auxiliary TOC line from the auxiliary TOC.
5. Lower the vehicle.
6. Remove the upper radiator support. Refer to Radiator Support Replacement .

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Fig. 130: Radiator To Auxiliary TOC Line From Radiator

Courtesy of GENERAL MOTORS CORP.

7. Disconnect the radiator to auxiliary TOC line from the radiator. Refer to Transmission Fluid Cooler
Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
8. Remove the radiator to auxiliary TOC line from the radiator.
9. Remove the radiator to auxiliary TOC line from the vehicle.

Installation Procedure

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Fig. 131: Radiator To Auxiliary TOC Line From Radiator

Courtesy of GENERAL MOTORS CORP.

1. Install the radiator to auxiliary TOC line to the vehicle.

2. Connect the radiator to auxiliary TOC line to the radiator. Refer to Transmission Fluid Cooler
Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
3. Install the upper radiator support. Refer to Radiator Support Replacement .
4. Raise the vehicle.
5. Install the radiator to auxiliary TOC line to the auxiliary TOC.

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Fig. 132: Radiator To Auxiliary TOC Line To Auxiliary TOC

Courtesy of GENERAL MOTORS CORP.

6. Connect the radiator to auxiliary TOC line to the auxiliary TOC. Refer to Transmission Fluid Cooler
Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
7. Install the right front fascia closeout panel. Refer to Front Bumper Fascia Lower Close Out Panel
Replacement .
8. Lower the vehicle.
9. Fill the transmission fluid. Refer to Transmission Fluid Fill Procedure.

AUTOMATIC TRANSMISSION FLUID PRESSURE TEST HOLE PLUG REPLACEMENT

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Fig. 133: Replacing Oil Pressure Test Plug

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Fluid Pressure Test Hole Plug Replacement

Callout Component Name
NOTE:
Refer to Fastener Notice .

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.Preliminary

Procedure: Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
Oil Pressure Test Plug
Tip:

l Clean the surrounding area around the oil pressure test plug.
1
l Check the transmission fluid level. Refer to Transmission Fluid Check and
Transmission Fluid Fill Procedure.

Tighten: 11 N.m (97 lb in)

AUTOMATIC TRANSMISSION ELECTRICAL CONNECTOR PASSAGE SLEEVE

REPLACEMENT

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Fig. 134: Replacing Automatic Transmission Electrical Connector Passage Sleeve

Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Electrical Connector Passage Sleeve Replacement

Callout Component Name
NOTE:
Orientate the alignment tab inside the passage sleeve with the slot in the electrical connector of the
control solenoid valve assembly. Push the sleeve straight into the case bore and connector. Do NOT
rotate the sleeve at any time. Ensure the sleeve is fully seated into the case. When the sleeve is
properly installed, the distance from the case surface to the end of the sleeve should be 14-16 mm.
Even though the correct electrical connections may still be maintained, failure to ensure proper
installation of the sleeve may result in a fluid leak around the sleeve lip seal and into the sleeve
cavity.

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission oil pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or
Filter Replacement.
3. Disconnect the vehicle wire harness electrical connector from the transmission electrical connector
passage sleeve. Refer to Automatic Transmission Inline 16-Way Connector Description.
Electrical Connector Slide Lock
1 Tip: Pull down on the slide lock to remove the sleeve. Push up on the slide lock after sleeve
installation.
Electrical Connector Passage Sleeve
Tip:

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l Use the DT 47715 Electrical Connector Passage Sleeve Remover/Installer and J

42183 Driver Handle to remove and install the electrical connector passage sleeve.
2
See Special Tools.
l The distance (a) from the case surface to the end of the sleeve should be 14-16 mm.

O-Ring Seals (Qty: 2)

3
Tip: Use a NEW O-ring seal.
Lip Seal
4
Tip: Use a NEW lip seal.

TRANSMISSION FLUID FILLER TUBE PLUG REPLACEMENT

Fig. 135: Replacing Transmission Fluid Filler Tube Plug

Courtesy of GENERAL MOTORS CORP.

Transmission Fluid Filler Tube Plug Replacement

Callout Component Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.
Preliminary Procedures:
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Transmission Fluid Filler Tube Plug
Tip:
1
1. Clean the area around the filler tube plug before removal.
2. Use a door trim tool to release the filler tube plug interlock.

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AUTOMATIC TRANSMISSION FLUID, FLUID PAN AND/OR FILTER REPLACEMENT

Fig. 136: Replacing Automatic Transmission Fluid, Fluid Pan and/or Filter
Courtesy of GENERAL MOTORS CORP.

Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement

Callout Component Name
NOTE:
Use Dexron VI transmission fluid only. Failure to use the proper fluid may result in transmission
internal damage.

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Place a suitable drain pan under the transmission.
3. Suitably support the rear drive assembly.
4. Remove the transmission mount nuts. Refer to Transmission Mount Replacement .
5. Raise the rear drive assembly to gain access to the transmission pan bolts.
Transmission Fluid Pan Bolt (Qty: 18)

NOTE:
1 Refer to Fastener Notice .

Tip: Tighten the bolts in the sequence shown.

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Tighten: 9 N.m (80 lb in)

Transmission Fluid Pan Assembly

l Check the condition of the draining fluid. Refer to Transmission Fluid Check.
2 l Fill the transmission with the proper fluid. Refer to Transmission General
Specifications and Transmission Fluid Fill Procedure.
l Fill the transmission with the proper amount of transmission fluid. Refer to Fluid
Capacity Specifications and Transmission Fluid Check.
Transmission Fluid Pan Gasket
3
Tip: The fluid pan gasket is reusable. Inspect the gasket to determine if it may be reused.
Fluid Filter Assembly
Tip:
4
l Install a new fluid filter assembly.
l Pull the fluid filter assembly straight out. Do not bend or twist the filter neck.

Fluid Filter Seal Assembly

NOTE:
Do not damage the case sealing surface when removing the filter seal assembly.
5
l Use a screwdriver or snap ring pliers to remove the filter seal.
l Install a new filter seal.
l Use the DT 47848 and the J 42183 to install the filter seal. See Special Tools.
l Lubricate the filter seal with transmission fluid before installing the filter.

MANUAL SHIFT SHAFT AND SEAL REPLACEMENT

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Fig. 137: Manual Shift Shaft and Seal Replacement

Courtesy of GENERAL MOTORS CORP.

Manual Shift Shaft and Seal Replacement

Callout Component Name
Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or
Filter Replacement.
3. Remove the manual shaft detent assembly roller. Refer to Control Valve Lower Body and Upper
Body Replacement.
Manual Shaft Detent Lever Hub Pin
Procedure:
1
Discard the pin. Replace with a NEW pin.
Tip: "Walk" the pin out using side cutters.
Manual Shift Shaft Pin
Procedure:
2
Discard the pin. Replace with NEW pin.
Tip: "Walk" the pin out using side cutters.
3 Manual Shift Shaft

4 Manual Shift Shaft Seal

Procedure

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 2006 Cadillac XLR
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l The manual shaft must be removed to replace the manual shaft seal.
l Use the J 45201 to remove the seal from the transmission case. See Special Tools.
l Use the J 43909 to install the seal into the transmission case.

MANUAL SHIFT DETENT LEVER AND PARK PAWL ACTUATOR REPLACEMENT

Fig. 138: Manual Shift Detent Lever and Park Pawl Actuator Replacement
Courtesy of GENERAL MOTORS CORP.

Manual Shift Detent Lever and Park Pawl Actuator Replacement

Callout Component Name
IMPORTANT:
Do not remove the park pawl or park pawl spring. The park pawl and park pawl spring are not
serviceable components.

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or
Filter Replacement.
3. Remove the manual shaft detent assembly roller. Refer to Control Valve Lower Body and Upper
Body Replacement.

1 Manual Shaft Detent Lever Hub Pin

Tip:

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lDiscard the pin. Replace with NEW pin.

l "Walk" the pin out using side cutters.

Manual Shift Shaft Pin

Tip:
2
l Discard the pin. Replace with NEW pin.
l "Walk" the pin out using side cutters.

3 Manual Shift Shaft

4 Manual Shaft Detent Lever Assembly
5 Park Pawl Actuator Assembly
Park Pawl Actuator Guide Pin
Tip:
6
l Discard the pin. Replace with NEW pin.
l "Walk" the pin out using side cutters.

7 Park Pawl Actuator Guide

Park Pawl Actuator Guide (O-Ring) Seals (Qty: 2)
8
Tip: Discard the seals. Replace with NEW seals.

MANUAL SHIFT SHAFT POSITION SWITCH REPLACEMENT

Fig. 139: Manual Shift Shaft Position Switch Replacement

Courtesy of GENERAL MOTORS CORP.

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Manual Shift Shaft Position Switch Replacement

Callout Component Name
Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission fluid pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan
and/or Filter Replacement.
Manual Shift Shaft Position Switch Assembly Electrical Connector
Tip:

Release the connector lock before disconnecting. Engage the connector lock after
l

1 connecting.
l The wiring harness clip near the connector does not need to be replaced if broken or
missing. The clip is used during manufacturing to keep the wire harness clear during
an automated bolt installation process. If the clip is damaged, simply remove and
discard.
Manual Shift Shaft Position Switch Assembly Bolt

NOTE:
2
Refer to Fastener Notice .

Tighten: 8 N.m (71 lb in)

Manual Shift Shaft Position Switch Assembly
3 Procedure:
Align the switch activator slide with the manual valve link.

CONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE ASSEMBLY

REPLACEMENT

Removal Procedure

IMPORTANT: The valve body must be removed from the transmission to replace the
control solenoid valve and transmission control module assembly.

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Fig. 140: Transmission Oil Pan And Filter

Courtesy of GENERAL MOTORS CORP.

1. Remove the transmission oil pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan and/or
Filter Replacement.
2. Remove the electrical connector passage sleeve. Refer to Automatic Transmission Electrical
Connector Passage Sleeve Replacement.

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Fig. 141: Valve Body Bolts

Courtesy of GENERAL MOTORS CORP.

3. Remove the valve body bolts (1).

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Fig. 142: Valve Body Assembly

Courtesy of GENERAL MOTORS CORP.

4. Remove the upper and lower control valve body assembly.

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Fig. 143: Speed Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

5. Disconnect the speed sensor electrical connector (2) from the control solenoid valve assembly.
6. Turn the control valve body assembly over.

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Fig. 144: Manual Shift Shaft Position Switch Connector

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Release the connector lock before disconnecting.

7. Disconnect the manual shift shaft position switch connector (4) from the control solenoid valve assembly.
8. Remove the bolt (3) and remove the manual shift shaft position switch assembly.

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Fig. 145: Control Solenoid Valve Assembly

Courtesy of GENERAL MOTORS CORP.

9. Remove the 2 bolts (1) from the "heat sink" side of the control solenoid valve assembly.

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Fig. 146: Control Solenoid Valve Assembly To Control Valve Body Assembly Bolts
Courtesy of GENERAL MOTORS CORP.

10. Remove the 5 bolts (2) and the 4 bolts (1) securing the control solenoid valve assembly to the control
valve body assembly.

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Fig. 147: Control Valve Body Assembly

Courtesy of GENERAL MOTORS CORP.

11. Remove the control valve body assembly.

NOTE: Use care when removing or installing the filter plate assembly. A broken or
missing retaining tab may not adequately secure the filter plate to the
control solenoid valve assembly, resulting in possible damage or
contamination.

12. Carefully remove and discard the filter plate assembly (5).

Installation Procedure

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Fig. 148: Filter Plate Assembly

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Inspect the 4 filter plate retaining tabs on the control solenoid valve
assembly. A broken or missing tab may not adequately secure the filter
plate to the control solenoid valve assembly.

1. Install a NEW filter plate assembly (1).

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Fig. 149: Control Solenoid Valve Assembly

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Note the locator pin on the control valve lower body assembly.

2. Align the control solenoid valve assembly (1) to the control valve lower body assembly.
3. Install the 2 bolts (2), through the "heat sink" side of the control solenoid valve assembly (1). Hand
tighten only.

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Fig. 150: Control Solenoid Valve Assembly To Control Valve Body Assembly Bolts
Courtesy of GENERAL MOTORS CORP.

4. Install the 4 bolts (1) and 5 bolts (2) securing the control solenoid valve assembly to the control valve
lower body assembly. Hand tighten only.

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Fig. 151: Manual Shift Shaft Position Switch Assembly

Courtesy of GENERAL MOTORS CORP.

5. Install the manual shift shaft position switch assembly (1). Align the switch activator slide with the
manual valve link. Secure with 1 bolt (3). Hand tighten only.

IMPORTANT: The wiring harness clip (4) on the manual shift shaft position switch does
not need to be replaced if damaged or missing. The clip functions only as
a manufacturing assembly aid to keep the harness clear during an
automated bolt installation process. If the clip is damaged, simply remove
and discard.

6. Connect and lock the manual shift shaft position switch electrical connector (5) to the control solenoid
valve assembly and attach the wiring harness clip (4).

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Fig. 152: Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

7. Install the 5 remaining bolts (1) and 1 remaining bolt (2). Hand tighten only.

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Fig. 153: Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

NOTE: Bolt torque sequencing is critical to the proper function of the control
solenoid valve assembly. Failure to follow the required sequencing may
result in transmission malfunction.

NOTE: Refer to Fastener Notice .

8. Tighten all bolts in the sequence shown. The 2 "heat sink" bolts (17, 18) must be tightened last.

Tighten: Tighten bolts to 8 N.m (6 lb ft).

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Fig. 154: Control Solenoid Valve Assembly

Courtesy of GENERAL MOTORS CORP.

9. Inspect the contact area between the "heat sink" area of the control solenoid valve assembly (1) and the
valve body. There should be no visible gap. If a gap exists, loosen all 18 bolts and retighten in the
sequence shown.

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Fig. 155: Output Speed Sensor Wiring Harness

Courtesy of GENERAL MOTORS CORP.

10. Inspect the 2 input and output speed sensor wiring harness clips (1) for damage. Replace if damaged.

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Fig. 156: Speed Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

11. Connect the speed sensor electrical connector (2) to the control solenoid valve assembly.

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Fig. 157: Valve Body Assembly

Courtesy of GENERAL MOTORS CORP.

12. Install the upper and lower control valve body assembly. Refer to Control Valve Lower Body and
Upper Body Replacement.
13. Install the electrical connector passage sleeve. Refer to Automatic Transmission Electrical Connector
Passage Sleeve Replacement.

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Fig. 158: Transmission Oil Pan And Filter

Courtesy of GENERAL MOTORS CORP.

14. Install the transmission oil pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan and/or
Filter Replacement.

IMPORTANT: After an internal transmission repair or internal part replacement, the

Service Fast Learn Adapt procedure should be performed.

15. Reset the transmission TAP values. Refer to Service Fast Learn Adapts.

CONTROL VALVE LOWER BODY AND UPPER BODY REPLACEMENT

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Fig. 159: Control Valve Lower Body and Upper Body Replacement
Courtesy of GENERAL MOTORS CORP.

Control Valve Lower Body and Upper Body Replacement

Callout Component Name
Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission fluid pan, gasket and filter. Refer to Automatic Transmission Fluid,
Fluid Pan and/or Filter Replacement.
3. Remove the electrical connector sleeve. Refer to Automatic Transmission Electrical Connector
Passage Sleeve Replacement.
Manual Shaft Detent Assembly Bolt (Qty: 1)

NOTE:
1
Refer to Fastener Notice .

Tighten: 12 N.m (106 lb in)

Manual Shaft Detent Assembly
2 Tip: Ensure the manual shaft detent assembly roller is centered over the manual shaft detent
lever assembly. Failure to center the roller may cause hard or no shift lever operation.

Control Valve Assembly Bolt (Qty: 6)

Procedure

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l Do not remove all the bolts in the control valve body assembly. Remove only the
bolts indicated.
3 l Tighten the bolts in the proper order. Refer to Control Valve Body Assembly
Installation in Unit Repair manual.

Tighten: 8 N.m (71 lb in)

Control Valve Assembly
Procedure:
Align the manual shift shaft position switch activator slide with the detent lever guide pin
during control valve body installation.
Tip:

l For control valve body disassembly, refer to Control Valve Body Assembly
4 Disassemble in the Unit Repair manual.
l For control valve body cleaning and inspection, refer to Control Valve Lower Body
Assembly Cleaning and Inspection and Control Valve Upper Body Assembly
Cleaning and Inspection in the Unit Repair manual.
l For ball check valve locations, refer to Ball Check Valve Locations in the Unit
Repair manual.
l For control valve body assembly, refer to Control Valve Body Assembly Assemble
in the Unit Repair manual.
Fluid Pump Seal Assembly
5
Tip: Do not reuse the seal assembly.
Fluid Pump Seal Assembly
6
Tip: Do not reuse the seal assembly.
Center Support Fluid Passage Seal Assembly
Tip:

7 l Do not reuse the seal assembly.

l It is recommended that transmission adaptive pressure (TAP) information be reset.
Transmission performance may be affected as new TAP values are learned. Reset the
TAP values. Refer to Service Fast Learn Adapts.

INPUT AND OUTPUT SPEED SENSOR REPLACEMENT

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Fig. 160: Input and Output Speed Sensor Replacement

Courtesy of GENERAL MOTORS CORP.

Input and Output Speed Sensor Replacement

Callout Component Name
Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the transmission fluid pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan
and/or Filter Replacement.
3. Remove the upper and lower valve body assembly. Refer to Control Valve Lower Body and
Upper Body Replacement.
4. Disconnect the speed sensor electrical connector from the control solenoid valve assembly.
Input and Output Speed Sensor Assembly Bolt (Qty: 2)

NOTE:
1
Refer to Fastener Notice .

Tighten: 12 N.m (106 lb in)

Input and Output Speed Sensor Assembly
Procedure:
2
Disconnect the speed sensor wiring harness clips. Inspect the clips for damage. Replace if
damaged.
3 Control Valve Body Assembly

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TRANSMISSION REPLACEMENT

Tools Required

J 42055 Transmission Support Fixture

Removal Procedure

NOTE: Failure to follow the proper removal and installation procedures may result in
damage to the engine crankshaft thrust bearing.

NOTE: When tilting down the rear of the driveline, observe the clearance between the
rear of the engine and the composite dash panel. Do not allow the engine to rest
unsupported against the composite dash panel, or vehicle damage may result.

NOTE: When lowering and removing the rear of the driveline, observe the clearance
between the rear of the transaxle assembly and the underbody to prevent
damage.

Fig. 161: Tilting Down Rear Of Driveline

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Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the differential to transmission lower nut.

(Removing the nut at this time will aid in separating the differential from the transmission after the
driveline has been removed from the vehicle.)

3. Remove the driveline support assembly. Refer to Driveline Support Assembly Replacement .

Fig. 162: View Of Transmission, Driveline Support Assembly & Bolts

Courtesy of GENERAL MOTORS CORP.

4. Remove the transmission to driveline support assembly bolts/studs.

5. Insert a flat bladed screwdriver, or similar tool, between the edge of the driveline support assembly and
the transmission, then begin to pry the driveline support assembly loose from the transmission.
6. Slowly slide the driveline support assembly away from the transmission while supporting the
transmission torque converter.
7. Using a strap positioned from side to side, secure the transmission torque converter to the transmission.

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Fig. 163: View Of Differential To Transmission Bolts & Nuts

Courtesy of GENERAL MOTORS CORP.

8. Remove the differential to transmission bolts and nuts.

IMPORTANT: Use care when separating the differential from the transmission to not
damage the transmission output shaft seal in the differential plate.

9. SLOWLY slide the differential from the transmission.

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Fig. 164: Differential & Plate

Courtesy of GENERAL MOTORS CORP.

10. Remove the differential plate from the differential.

11. Remove the transmission from the J 42055 , if necessary.
12. Flush the transmission oil cooler. Refer to Transmission Fluid Cooler Flushing and Flow Test
(J45096) or Transmission Fluid Cooler Flushing and Flow Test (J35944 A) .

Installation Procedure

NOTE: Failure to follow the proper removal and installation procedures may result in
damage to the engine crankshaft thrust bearing.

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Fig. 165: Installing Differential O-Ring

Courtesy of GENERAL MOTORS CORP.

1. Install the transmission to the J 42055 , if removed.

2. Install the differential plate to the transmission, use care not to damage the transmission output seal in the
rear of the plate.
3. Position the differential plate seal flush with the transmission case.

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Fig. 166: View Of Differential To Transmission Bolts & Nuts

Courtesy of GENERAL MOTORS CORP.

4. SLOWLY slide the differential to the transmission.

NOTE: Refer to Fastener Notice .

5. Install the differential to transmission bolts and nuts.

Tighten: Tighten the differential to transmission bolts and nuts to 50 N.m (37 lb ft).

6. Install the driveline support assembly. Refer to Driveline Support Assembly Replacement .

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Fig. 167: View Of Engine Flywheel Housing Access Plug

Courtesy of GENERAL MOTORS CORP.

7. Install the engine flywheel housing access plug.

8. Lower the vehicle.
9. Check the transmission fluid level. Refer to Transmission Fluid Check .
10. Road test the vehicle.
11. Inspect for fluid leaks.
12. Perform a final inspection for the proper fluid level.

TORQUE CONVERTER REPLACEMENT

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Fig. 168: Replacing Torque Converter

Courtesy of GENERAL MOTORS CORP.

Torque Converter Replacement

Callout Component Name
Preliminary Procedure:
Remove the transmission. Refer to Transmission Replacement.
Torque Converter Assembly
Tip:

1 l Place a drain pan under the front of the transmission.

l Use care not to damage the torque converter seal during the installation procedure.

l Rotate the torque converter assembly in order to engage the input shaft, the stator
shaft, and the lugs onto the oil pump drive gear.
2 Turbine Shaft Seal O-ring

TORQUE CONVERTER FLUID SEAL REPLACEMENT

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Fig. 169: Torque Converter Fluid Seal

Courtesy of GENERAL MOTORS CORP.

Torque Converter Fluid Seal Replacement

Callout Component Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications.

Preliminary Procedures

1. Remove the transmission. Refer to Transmission Replacement.

2. Remove the torque converter. Refer to Torque Converter Replacement.
NEW Turbine Shaft (O-Ring) Seal
1
Tip: Use a small screw driver to remove the seal.
2 Torque Converter Fluid Seal Retaining Ring
Torque Converter Fluid Seal Assembly
3
Tip: Use the J 45000 to remove the seal.

RANGE SELECTOR LEVER CABLE ADJUSTMENT

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Fig. 170: Releasing The Shift Control Cable Adjuster Lock

Courtesy of GENERAL MOTORS CORP.

1. Shift the transmission into NEUTRAL.

2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Using a flat-bladed screwdriver, carefully pry to release the transmission shift control cable adjustment
lock.
4. Check to be sure that the transmission floor shift control is in the NEUTRAL detent position.
5. Check to be sure that the transmission is in the NEUTRAL detent position.

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Fig. 171: Depressing The Shift Control Cable Adjuster Lock

Courtesy of GENERAL MOTORS CORP.

6. Press to secure the transmission shift control cable adjustment lock.

7. Lower the vehicle.

DESCRIPTION AND OPERATION

DEFINITIONS AND ABBREVIATIONS

Throttle Positions

Engine Braking

A condition where the engine is used to slow the vehicle by manually downshifting during a zero throttle
coastdown.

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Full Throttle Detent Downshift

A quick apply of the accelerator pedal to its full travel, forcing a downshift.

Heavy Throttle

Approximately 3/4 of accelerator pedal travel, 75 percent throttle position.

Light Throttle

Approximately 1/4 of accelerator pedal travel, 25 percent throttle position.

Medium Throttle

Approximately 1/2 of accelerator pedal travel, 50 percent throttle position.

Minimum Throttle

The least amount of throttle opening required for an upshift.

Wide Open Throttle (WOT)

Full travel of the accelerator pedal, 100 percent throttle position.

Zero Throttle Coastdown

A full release of the accelerator pedal while the vehicle is in motion and in drive range.

Shift Condition Definitions

Bump

A sudden and forceful apply of a clutch or a band.

Chuggle

A bucking or jerking. This condition may be most noticeable when the converter clutch is engaged. It is
similar to the feel of towing a trailer.

Delayed

A condition where a shift is expected but does not occur for a period of time. This could be described as a
clutch or band engagement that does not occur as quickly as expected during a part throttle or wide open
throttle apply of the accelerator, or during manual downshifting to a lower range. This term is also
defined as LATE or EXTENDED.

Double Bump - Double Feel

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Two sudden and forceful applies of a clutch or a band.

Early

A condition where the shift occurs before the car has reached proper speed. This condition tends to labor
the engine after the upshift.

End Bump

A firmer feel at the end of a shift than at the start of the shift. This is also defined as END FEEL or SLIP
BUMP.

Firm

A noticeably quick apply of a clutch or band that is considered normal with a medium to heavy throttle.
This apply should not be confused with HARSH or ROUGH.

Flare

A quick increase in engine RPM along with a momentary loss of torque. This most generally occurs
during a shift. This condition is also defined as SLIPPING.

Harsh - Rough

A more noticeable apply of a clutch or band than FIRM. This condition is considered undesirable at any
throttle position.

Hunting

A repeating quick series of upshifts and downshifts that causes a noticeable change in engine RPM, such
as a 4-3-4 shift pattern. This condition is also defined as BUSYNESS.

Initial Feel

A distinctly firmer feel at the start of a shift than at the finish of the shift.

Late

A shift that occurs when the engine RPM is higher than normal for a given amount of throttle.

Shudder

A repeating jerking condition similar to CHUGGLE but more severe and rapid. This condition may be
most noticeable during certain ranges of vehicle speed.

Slipping

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A noticeable increase in engine RPM without a vehicle speed increase. A slip usually occurs during or
after initial clutch or band apply.

Soft

A slow, almost unnoticeable clutch or band apply with very little shift feel.

Surge

A repeating engine related condition of acceleration and deceleration that is less intense than CHUGGLE.

Tie-Up

A condition where two opposing clutch and/or bands are attempting to apply at the same time causing the
engine to labor with a noticeable loss of engine RPM.

Noise Conditions

Drive Link Noise

A whine or growl that increases or fades with vehicle speed, and is most noticeable under a light throttle
acceleration. It may also be noticeable in PARK or NEUTRAL operating ranges with the vehicle
stationary.

Final Drive Noise

A hum related to vehicle speed which is most noticeable under a light throttle acceleration.

Planetary Gear Noise

A whine related to vehicle speed, which is most noticeable in FIRST gear, SECOND gear, FOURTH gear
or REVERSE. The condition may become less noticeable, or go away, after an upshift.

Pump Noise

A high pitched whine that increases in intensity with engine RPM. This condition may also be noticeable
in all operating ranges with the vehicle stationary or moving.

Torque Converter Noise

A whine usually noticed when a vehicle is stopped, and the transmission is in DRIVE or REVERSE. The
noise will increase with engine RPM.

Transmission Abbreviations

A/C

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Air Conditioning

AC

Alternating Current

AT

Automatic Transmission

BAS

Brake Apply Sensor

BCM

Body Control Module

CAN

Controller Area Network

DC

Direct Current

DIC

Driver Information Center

DMM

Digital Multimeter

DTC

Diagnostic Trouble Code

ECM

Engine Control Module

ECT

Engine Coolant Temperature

HSD2

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High Side Driver 2

HVAC

Heating, Ventilation, and Air Conditioning

IGN

Ignition

IMS

Internal Mode Switch

ISS

Input Speed Sensor

MAP

Manifold Absolute Pressure

MIL

Malfunction Indicator Lamp

OBD

On Board Diagnostic

OSS

Output Speed Sensor

PC

Pressure Control

PWM

Pulse Width Modulation

RPM

Revolutions Per Minute

SS

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Shift Solenoid

SVS

Service Vehicle Soon

TAP

Transmission Adaptive Pressure

TCC

Torque Converter Clutch

TCM

Transmission Control Module

TEHCM

Transmission Electro-Hydraulic Control Module

TFP

Transmission Fluid Pressure

TFT

Transmission Fluid Temperature

TP

Throttle Position

VSS

Vehicle Speed Sensor

WOT

Wide Open Throttle

TRANSMISSION IDENTIFICATION INFORMATION

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Fig. 172: Locating Transmission Identification

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Model Year
2 Model Code
3 Transmission Family
4 Transmission Assembly Number
5 Julian date
6 Sequential Serial Number

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7 Source Code
8 Broadcast Code
9 Bar Code
10 Transmission I.D.

TRANSMISSION GENERAL DESCRIPTION

The Hydra-Matic 6-Speed RWD is a fully automatic, 6 speed, rear-wheel drive, electronic-controlled
transmission. It consists primarily of a 4 element torque converter, an integral fluid pump and converter
housing, a single and double planetary gear set, friction and mechanical clutch assemblies, and a hydraulic
pressurization and control system. There are four variants of the transmission, all based on torque capacity.
Architecture is common between the variants, and component differences are primarily related to size.

The 4 element torque converter contains a pump, a turbine, a pressure plate splined to the turbine, and a stator
assembly. The torque converter acts as a fluid coupling to smoothly transmit power from the engine to the
transmission. It also hydraulically provides additional torque multiplication when required. The pressure plate,
when applied, provides a mechanical direct drive coupling of the engine to the transmission.

The planetary gear sets provide the 6 forward gear ratios and reverse. Changing gear ratios is fully automatic
and is accomplished through the use of a transmission control module (TCM) located inside the transmission.
The TCM receives and monitors various electronic sensor inputs and uses this information to shift the
transmission at the optimum time.

The TCM commands shift solenoids and variable bleed pressure control solenoids to control shift timing and
feel. The TCM also controls the apply and release of the torque converter clutch which allows the engine to
deliver the maximum fuel efficiency without sacrificing vehicle performance. All the solenoids, including the
TCM, are packaged into a self-contained control solenoid valve assembly.

The hydraulic system primarily consists of a vane-type pump, 2 control valve body assemblies, converter
housing and case. The pump maintains the working pressures needed to stroke the clutch pistons that apply or
release the friction components. These friction components, when applied or released, support the automatic
shifting qualities of the transmission.

The friction components used in this transmission consist of 5 multiple disc clutches. The multiple disc clutches
combine with one mechanical sprag clutch to deliver 7 different gear ratios, 6 forward and one reverse, through
the gear sets. The gear sets then transfer torque through the output shaft.

The transmission may be operated in any of the following gear ranges:

PARK (P)

This position locks the rear wheels and prevents the vehicle from rolling either forward or backward.
PARK is the best position to use when starting the vehicle. Because the transmission utilizes a shift lock
control system, it is necessary to fully depress the brake pedal before shifting out of PARK. For safety
reasons, use the parking brake in addition to the PARK position.

REVERSE (R)

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This position allows the vehicle to be operated in a rearward direction.

NEUTRAL (N)

This position allows the engine to be started and operated while driving the vehicle. If necessary, you
may select this position in order to restart the engine with the vehicle moving. This position should also
be used when towing the vehicle.

DRIVE (D)

Drive range should be used for all normal driving conditions for maximum efficiency and fuel economy.
Drive range allows the transmission to operate in each of the 6 forward gear ratios. Downshifts to a lower
gear, or higher gear ratio, are available for safe passing by depressing the accelerator or by manually
selecting a lower gear in the manual mode range.

(Refer to the vehicle owner's manual for Driver Shift Control (DSC) information.)

TRANSMISSION COMPONENT AND SYSTEM DESCRIPTION

The mechanical components of the 6-Speed RWD are as follows:

l A torque converter with an electronically controlled capacity clutch (ECCC). ECCC was developed to
reduce the possibility of noise, vibration, or chuggle caused by TCC apply. In a torque converter with
ECCC, the pressure plate does not always fully lock to the torque converter cover. Instead, the pressure
plate maintains a small amount of slippage. In RWD 6-Speed transmissions, this slippage can range from
0-50 RPM. Full lockup (0 RPM slip) is still available on some applications. TCC may apply in 2nd, 3rd,
4th, 5th, or 6th gears. The specific TCC apply points and the amount of clutch slippage are determined by
a number of operating conditions, including throttle position, vehicle speed, gear, as well as specific
vehicle application. Transmission fluid temperature will also affect TCC apply points.
l Vane-type fluid pump assembly
l 1-2-3-4 and 3-5 Reverse clutch assembly
l Input sun gear and carrier assembly
l 4-5-6 clutch assembly with turbine shaft
l 4-5-6 clutch hub assembly
l 1-2-3-4 clutch hub assembly
l 2-6 and 3-5 reverse clutch hub assembly
l Center support assembly, with 2-6 clutch assembly, and low and Reverse clutch assembly
l Low clutch sprag assembly
l A double planetary output carrier assembly
l Output shaft assembly
l Control valve body assembly

The electrical components of the 6-Speed RWD are as follows:

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l Input and output speed sensor assembly

l Manual shift shaft position switch
l Control solenoid valve assembly, which contains the following components:
¡ Transmission control module (TCM)

¡ 5 variable bleed line pressure control (PC) solenoids

¡ Transmission fluid pressure (TFP) switch assembly

¡ Torque converter clutch (TCC) pressure control solenoid

¡ 2 shift solenoids

For more information, refer to Electronic Component Description.

TRANSMISSION ADAPTIVE FUNCTIONS

The 6L80 transmission utilizes a line pressure control system during upshifts to compensate for the normal wear
of transmission components. As the apply components within the transmission wear or change over time, shift
time (the time required to apply a clutch) increase or decreases. In order to compensate for these changes, the
transmission control module (TCM) adjusts the pressure commands to the various PC solenoids, to maintain the
originally calibrated shift timing. The automatic adjusting process is referred to as "adaptive learning" and it is
used to ensure consistent shift feel plus increase transmission durability. The TCM monitors the A/T input
speed sensor (ISS) and the A/T output speed sensor (OSS) during commanded shifts to determine if a shift is
occurring too fast (harsh) or too slow (soft) and adjusts the corresponding pressure control (PC) solenoid signal
to maintain the set shift feel.

The purpose of the adapt function is to automatically compensate the shift quality for the various vehicle shift
control systems. The adapt function is a continuous process that will help to maintain optimal shift quality
throughout the life of the vehicle.

TRANSMISSION INDICATORS AND MESSAGES

The following transmission-related indicators and messages may be displayed on the Instrument Panel Cluster
(IPC). For a complete listing and description of all vehicle indicators and messages, refer to
Indicator/Warning Message Description and Operation .

"TRANSMISSION HOT IDLE ENGINE"

This message is displayed when the TCM detects a transmission fluid temperature (TFT) equal to or
greater than 130°C (266°F) for 5 seconds.

"SERVICE TRANSMISSION"

This message displays when there is a problem with the transmission.

ELECTRONIC COMPONENT DESCRIPTION

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Fig. 173: Control Solenoid (W/Body and TCM) Valve Assembly

Courtesy of GENERAL MOTORS CORP.

Callout Component Name

1 Line Pressure Control (PC) Solenoid
2 Torque Converter Clutch (TCC) Pressure Control (PC) Solenoid
3 Shift Solenoid (SS) 2
4 16 Pin Connector
5 Pressure Control (PC) Solenoid 3
6 Transmission Fluid Pressure (TFP) Switch 5
7 Pressure Control (PC) Solenoid 4
8 Pressure Control (PC) Solenoid 2
9 Transmission Fluid Pressure (TFP) Switch 3
10 Transmission Fluid Pressure (TFP) Switch 1
11 Transmission Fluid Pressure (TFP) Switch 4
12 Pressure Control (PC) Solenoid 5
13 Shift Solenoid (SS) 1

The control solenoid (w/body and TCM) valve assembly contains the following components:

l Transmission control module (TCM)

l Clutch pressure control solenoids (Clutch PC Sol)
l Shift solenoids (SS)
l Line pressure control solenoid (Line PC Sol)
l Torque converter clutch pressure control solenoid (TCC PC Sol)
l Transmission fluid temperature sensor (TFT Sensor)
l TCM temperature sensor
l Power-up temperature sensor
l Transmission fluid pressure switches (TFP Sw)

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These components are not serviced separately. The control solenoid (w/body and TCM) valve assembly utilizes
a lead-frame system to connect these components electrically to the TCM. No wires are used for these
components. The control solenoid (w/body and TCM) valve assembly bolts directly to the lower and upper
valve body assemblies inside the transmission. The control solenoid (w/body and TCM) valve assembly
connects to the engine harness 16-way connector via a pass-thru sleeve.

Internal Mode Switch (IMS)

Fig. 174: Identifying Internal Mode Switch (IMS)

Courtesy of GENERAL MOTORS CORP.

The transmission manual shift shaft switch assembly is a sliding contact switch attached to the manual shift
shaft inside the transmission case. The five inputs to the TCM from the transmission manual shift shaft switch
assembly indicate the transmission gear selector lever position. This information is used for engine controls as
well as determining the transmission shift patterns. The state of each input is available for display on the scan
tool. The five input parameters represented are Signal A, Signal B, Signal C, Signal P (Parity) and Signal N
(P/N Start).

Input Speed Sensor (ISS)

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Fig. 175: Identifying Input Speed Sensor (ISS)

Courtesy of GENERAL MOTORS CORP.

The input speed sensor (ISS) is a hall-effect type sensor. The ISS mounts to the control valve upper body
assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and
connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives
8.3-9.3 volts on the ISS/OSS Supply Voltage circuit from the TCM. As the 1-2-3-4 and 3-5-R clutch housing
rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch
housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM)
valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line
pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

Output Speed Sensor (OSS)

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Fig. 176: Identifying Output Speed Sensor (OSS)

Courtesy of GENERAL MOTORS CORP.

The output speed sensor (OSS) is a hall-effect type sensor. The OSS mounts to the control valve upper body
assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and
connector. The sensor faces the output shaft machined teeth surface. The sensor receives 8.3-9.3 volts on the
ISS/OSS supply voltage circuit from the TCM. As the output shaft rotates, the sensor produces a signal
frequency based on the machined surface of the output shaft. This signal is transmitted through the OSS signal
circuit to the TCM. The TCM uses the OSS signal to determine line pressure, transmission shift patterns, torque
converter clutch (TCC) slip speed and gear ratio.

AUTOMATIC TRANSMISSION INLINE 16-WAY CONNECTOR DESCRIPTION

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Fig. 177: Identifying Automatic Transmission Inline 16-Way Connector

Courtesy of GENERAL MOTORS CORP.

The transmission electrical connector is an important part of the transmission operating system. Any
interference with the electrical connection can cause the transmission to set diagnostic trouble codes or affect
proper operation. The following items can affect the electrical connection:

l Bent pins in the connector from rough handling during connection and disconnection
l Wires backing away from the pins or coming uncrimped, in the external wiring harness
l Dirt contamination entering the connector when disconnected
l Transmission fluid leaking into the connector, wicking up into the external wiring harness and degrading
the wire insulation
l Moisture intrusion in the connector
l Low pin retention in the external connector from excessive connection and disconnection of the wiring
connector assembly
l Pin corrosion from contamination
l Damaged connector assembly

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Remember the following points:

l Limit twisting or wiggling the connector during removal. Bent pins can occur.
l Do not pry the connector off with a screwdriver or other tool.
l Whenever the transmission external wiring connector is disconnected from the internal harness and the
engine is operating, DTCs will set. Clear these DTCs after reconnecting the external connector.

Use the following procedure to disconnect the engine side of the 16-way connector from the transmission side:

1. Unlock the slide lock on the engine wiring harness connector.

2. Rotate the connector lever counterclockwise and remove the connector from the electrical connector
passage sleeve.

Use the following procedure to reconnect the engine side of the 16-way connector to the transmission side:

1. Orient the alignment slot on the engine side of the connector with the alignment tab on the electrical
connector passage sleeve.
2. Slide the engine side connector through the electrical connector passage sleeve and into the transmission
side connector.
3. Rotate the connector lever clockwise until the connector is fully seated.
4. Lock the slide lock on the connector.

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS

Special Tools
Illustration Tool Number/ Description

DT 47715
Electrical Connector Passage Sleeve
Remover/Installer

DT 47770
Seal Installer

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DT 47784
Transmission Fluid Fill Pan Adapter

DT 47825
Control Solenoid Test Plate

DT 47825-10
Jumper Harness

DT 47848
Seal Installer

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J 21867
Pressure Gage

J 28467-B
Universal Engine Support Fixture

J 35616
GM-Approved Terminal Test Kit

J 38522
Variable Signal Generator

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J 41623-B
Cooler Quick Connect Tool

J 42055
Drivetrain Support Fixture

J 42183
Driver Handle

J 45000
Seal Remover

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J 45096
Transmission Oil Cooling System Flush and Flow
Test Tool

J 45096-30
Transmission Cooler Flush Adapter

J 45096-40
Transflow Oil Fill Adapter

J 45201
Cooler Line Seal Remover

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