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10B-1 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Body Electrical Control System
Control Systems

Precautions
Precautions in Diagnosing Trouble
S6RW0DA200001
• Diagnostic information stored in BCM memory can be cleared as well as checked by using SUZUKI scan tool.
Before using scan tool, read its Operator’s (Instruction) Manual carefully to have good understanding as to what
functions are available and how to use it.
• Be sure to read “Precautions for Electrical Circuit Service in Section 00” before inspection and observe what is
written there.
• Communication of ECM, TCM (A/T model), ABS control module, 4WD control module (if equipped), keyless start
control module (if equipped), combination meter and BCM is established by CAN (Controller Area Network). For
detail of CAN communication for BCM, refer to “CAN Communication System Description”. Therefore, handle CAN
communication line with care referring to “Precaution for CAN Communication System in Section 00”.

General Description
BCM General Description • Warning buzzer
S6RW0DA201001
The Body electrical Control Module (BCM) is • Rear end door window defogger and door mirror
incorporated in junction block. Do not attempt removal of heater (if equipped)
BCM from junction block as it may cause contact failure. • Rear end door opener (if equipped)
The BCM incorporates relays and controllers which are • Theft deterrent light
used for the following systems and controls them. Also, the BCM has a function to cause the interior light
• Power door lock (if equipped) and open door warning light in the combination meter to
• Keyless entry (if equipped) turn off when any door is left open for longer than 15
minutes to reduce wasteful battery consumption.
• Door lock function of keyless start system (if
In addition, it is possible to check operation of actuator
equipped)
which is controlled by BCM by using the output test
• Rear wiper function of SUZUKI scan tool to operate actuator
• Combination meter simulatively.
• Interior light

CAN Communication System Description

S6RW0DA201002
Refer to “CAN Communication System Description in Section 1A” for CAN communication system description.
BCM communication control data with each control module as follows.

BCM Transmission Data

Combination Keyless Start

ECM Meter Control Module
(if equipped)

A/C switch ON signal

Electric load signal
Brake fluid level switch signal
Parking brake switch signal
Diagnostic trouble code (DTC)
BCM Transmit DATA Illumination ON signal
Seat belt buckle switch signal
Charging system signal
Engine oil pressure switch signal
Door switch status
Door lock status
I6RW0CA20001-01
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Software Control
Company, System:
2004 10B-2
For Evaluation Only.
BCM Reception Data

Keyless Start
TCM Combination
ECM Control Module
(A/T model) Meter
(if equipped)

Engine speed signal

Engine coolant temperature signal
Vehicle speed signal
Brake pedal switch signal
A/C compressor clutch signal
A/C refrigerant pressure signal
BCM Receive DATA Fuel consumption signal
Engine type signal
Transmission range sensor signal
Combination meter spec signal
Ignition knob switch signal
Door lock/unlock request signal
Buzzer request signal
Answer back request signal
I6RW0CA20002-01

Theft Deterrent Light

S6RW0DA201003
The information display or clock (1) of this vehicle includes a theft deterrent light (2) for the theft preventive purpose.
The BCM makes the theft deterrent light flash at certain intervals after the ignition switch is turned off until it is turned
on again. Also, DTCs stored in BCM can be checked by reading the flashing patterns of the theft deterrent light when
diagnosing troubles.

1 2

I5RW0AA20003-01

Security Alarm Description (If Equipped)

S6RW0DA201005
Operation
The security alarm system provides a warning of an abnormal condition to those who are around. Its operation is as
follows. While the system is in the stand-by mode (when 20 seconds or more elapsed after the door is locked using a
keyless entry transmitter or door request switch), BCM monitors door lock status, door switch status and battery power
supply voltage. When it detects an abnormal condition (door is unlocked by some way other than using keyless entry
transmitter or door request switch and opened or cut off BCM power supply voltage temporarily), it activates the
warning buzzer (located in BCM), theft deterrent light, hazard warning relay and horn relay.
The security alarm system has 2 selectable modes.
• A mode: No operation
• B mode: Theft deterrent light blinks, hazard warning lights blink, warning buzzer (located in BCM) sounds and horn
sounds
 Edited by Foxit PDF Editor
10B-3 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
When “B” mode is selected and the door is locked using keyless entry transmitter or door request switch, the theft
deterrent light (1) flashes at 0.1 second interval for 20 seconds and the security alarm system is set to the stand-by
mode (2). Once it is set to the stand-by mode, the theft deterrent light blinks at 2 second intervals.
When the system is set to stand-by mode and the door is unlocked by some way other than using keyless entry
transmitter or door request switch and opened or cut off BCM power supply voltage temporarily, the alarm devices
operate according to the selected mode as described above.

1
C

B
T3
T1 T2 2

I7RW01A20015-01

A: Indicator light turned ON T1: 0.1 seconds

B: Indicator light turned OFF T2: 20 seconds
C: When door is locked using keyless entry transmitter or door request switch T3: 2 seconds

The alarm stops under either of the following conditions.

• Ignition switch is turned ON
• A certain time has elapsed since the alarm started
For selection of the mode of the security alarm system, refer to “Security Alarm Mode Selection Procedure (If
Equipped)”.

Input / Output Table

Input Output

Door request switch signal Horn relay

Keyless entry transmitter Hazard warning relay

Door switch status

BCM Warning buzzer
(located in BCM)
Door lock status
Theft deterrent light
Ignition switch (in information display)
I5RS0CA20003-01

Schematic and Routing Diagram

Body Electrical Control System Wiring Circuit Diagram
S6RW0DA202001

NOTE
This wiring diagram shows circuits related to only BCM, not the entire circuits of BCM and junction
block. Refer to “Power Supply Diagram in Section 9A” for wiring circuits other than the figure below.
 Edited by Foxit PDF Editor
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Company, System:
2004 10B-4
For Evaluation Only.

1
+B 30
2 IG2 IG2
3
BLU/YEL L01-11 L312-4 YEL
4 L314-9 ORN
31
IG2 RED
32 WHT
5 12V
YEL G272-20
WR INT ON EW RED 33
WASH WHT
OFF BLU/BLK G04-21 12V
INT E04-1 RED
ON E04-2 34
GRN G04-22 WHT
WASH, ON
5V
RED 35
6 WHT
YEL/RED E04-10 36
YEL/BLK E04-8 G04-4 RED RED
+BB G04-2 WHT WHT
7
BLU/YEL G04-16 37
IG1 RED
8 38
WHT
GRY G04-8
IG1 G04-3 RED
9 G04-1 WHT
IG1 +BB
GRY E04-11 39
5V
E04-9 BLU 40
YEL L313-2 L313-3 PPL/WHT 41
10 G04-5 BLU
11 42
PPL G04-15 +B

12 L01-10 [A]
GRN/RED
43
L01-1 GRN
13
+B 46 46 45 44
14 IG1 L315-9 GRN
43
L315-10 RED/BLU
WHT/BLU E04-4
15
+B
16
YEL G04-11
43 L315-1 YEL
17
5V
5V
LT GRN G04-13
5V +B [B]
18
PNK G04-14 46 46 45 44
L315-9 GRN
BLK G04-12 43
L315-10 RED/BLU
12V

BLK/BLU L01-7 12V 47

19 G272-11 WHT +B
BLK/RED L01-15 12V 50
20 20 20 48 49 OFF
BLK/YEL L01-3 DOOR
21 L312-5 WHT
IG1 ON
22 +B
BRN/YEL L01-14 IG1
L314-6 BLK/RED
23 L314-7 BLK/RED
RED/BLK E04-5 IG1 L314-8 52
BLK/RED
51 G271-7 BLK/RED 53
24 54
RED/BLU L01-6 55
12V +B
56
12V E325-3 GRN
25 LT GRN/BLK L01-16
G272-3 BLU 58
BRN L01-17 12V 57
12V +BB
26 GRY/WHT L01-12 G272-7 RED/YEL
59 +BB
GRY/RED L01-5
12V +B E324-2 WHT
27
IG1 G273-5 BLU 60
WHT/RED L01-4 IG1
28 G273-2 GRN
GRN/WHT G04-18 IG1 G272-9 BLK
29 G271-3 BLK/ORN 61
GRN/YEL G04-17 L314-4 BLK/ORN

62 63
I6RW0DA20001-01

[A]: Without security alarm system 21. Rear end door switch 43. Door lock actuator relay (if equipped)
[B]: With security alarm system 22. Driver side seat belt switch 44. Driver side door lock actuator (if equipped)
 Edited by Foxit PDF Editor
10B-5 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
1. BCM 23. Brake fluid level switch 45. Passenger side door lock actuator (if equipped)
2. Rear end door opener actuator (if equipped) 24. Parking brake switch 46. Rear door lock actuator (if equipped)
3. Rear end door opener relay (if equipped) 25. Door key cylinder switch (included in door lock 47. Hazard warning switch
actuator) (if equipped)
4. Rear washer motor 26. Manual door lock switch (if equipped) 48. Turn signal and hazard warning relay
5. Rear wiper and washer switch 27. Rear end door opener switch (if equipped) 49. To turn signal light
6. Outside air temperature sensor (if equipped) 28. A/C switch (if equipped) 50. Interior light
7. Key reminder switch 29. Rear end door window defogger switch 51. Rear end door window defogger relay
8. Theft deterrent light 30. Rear wiper motor 52. Right side door mirror heater (if equipped)
9. Oil pressure switch 31. Rear wiper relay 53. Left side door mirror heater (if equipped)
10. SDM 32. TCM (A/T model) 54. Rear end door window defogger
11. P/S control module 33. ECM 55. Rear end door window defogger indicator light
12. Navigation (if equipped) 34. ABS control module 56. Horn relay
13. Audio unit (if equipped) 35. Keyless start control module (if equipped) 57. Horn switch
14. Headlight leveling control module (if equipped) 36. CAN junction connector 58. Horn
15. Generator 37. Combination meter 59. Lighting switch
16. Information display (if equipped) 38. 4WD control module (if equipped) 60. Ignition switch
17. HVAC control module (if equipped) 39. DLC 61. Battery
18. Keyless entry receiver (if equipped) 40. To ABS control module and P/S control module 62. Body ground
19. Driver side door switch 41. To SDM 63. Engine ground
20. Other than driver side door switch 42. To HVAC control module (if equipped)
 Edited by Foxit PDF Editor
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Company, System:
2004 10B-6
For Evaluation Only.
Connector Layout Diagram of BCM and Junction Block
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BCM and Junction Block Connectors (Viewed from Harness Side)

I6RW0CA20004-01

[A]: Junction block (viewed from BCM side) 2. Junction block 5. Rear wiper relay
[B]: Junction block (viewed from relay side) 3. Blower motor relay 6. Rear end door window defogger relay
1. BCM 4. Horn relay 7. Turn signal and hazard warning relay
 Edited by Foxit PDF Editor
10B-7 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Component Location
BCM and Related System Component Location
S6RW0DA203001

8
10
2
1

3
6

19 18 14

21 17

20

24 24
25
11
26

13
23 [A] [B]
25
16 15 15

22
22 27 12 16
I6RW0DA20002-01

[A]: Auto A/C 9. Rear end door opener switch (if equipped) 19. Lighting switch
[B]: Manual A/C 10. Rear end door opener actuator (incorporated in 20. Manual door lock switch (if equipped)
door switch)
1. Generator 11. Keyless entry receiver or keyless start control 21. Key reminder switch (included in ignition switch)
module (if equipped)
2. Brake fluid level switch 12. Parking brake switch 22. Junction block
3. ECM 13. Seat belt buckle switch 23. BCM
4. Oil pressure switch 14. Theft deterrent light 24. Horn relay
5. Outside air temperature sensor (if equipped) 15. Rear end door window defogger switch 25. Rear wiper relay
6. Door lock actuator (incorporated in key 16. A/C switch (if equipped) 26. Rear end door window defogger relay
cylinder switch)
7. Door switch 17. Hazard warning switch 27. Turn signal and hazard warning relay
8. Interior light 18. Rear wiper switch
 Edited by Foxit PDF Editor
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Company, System:
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For Evaluation Only.
Diagnostic Information and Procedures
BCM Self-Diagnosis Function
S6RW0DA204001
• BCM monitors conditions of the system components and its circuit with ignition switch turned to ON position. When
an abnormality in the system occurs, the area where that abnormality lies is stored in the memory of EEPROM in
BCM.
• DTC can be checked in either one of following ways.
– DTC can be checked by SUZUKI scan tool (2) connected to DLC (1).
– DTC can be read from flashing pattern of Theft deterrent light (3). Also, DTC is displayed on combination meter
(4) at the same time.

3
2

4
I5RW0AA20007-01

BCM Input / Output Table

Control Input Output
• Key cylinder switch • Each door lock actuator
Power door lock system
• Manual door lock switch
• Key reminder switch • Each door lock actuator
Keyless entry system • Keyless entry receiver • Turn signal and hazard warning relay
• Driver side door switch • Interior light
• Keyless start control module • Each door lock actuator
Keyless start system
• Turn signal and hazard warning relay
(Door lock function)
• Interior light
• Rear wiper INT switch • Rear wiper relay
Rear wiper
• Rear wiper LO switch
• Tail light switch • Combination meter
• Oil pressure switch
• Parking brake switch
Combination meter • Driver side seat belt switch
• Brake fluid level switch
• Generator
• Each door switch
• Each door switch • Interior light
Interior light
• Key reminder switch
• Key reminder switch • Warning buzzer (located in BCM)
• Tail light switch
Warning buzzer • Driver side door switch
• Keyless start control module (if equipped)
• TCM (reverse signal) (if equipped)
 Edited by Foxit PDF Editor
10B-9 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
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Control Input Output
Rear end door window • Rear end door window defogger switch • Rear end door window defogger
defogger • Generator relay
• Manual door lock switch (unlock signal) • Rear end door opener relay
• Key cylinder switch (unlock signal)
Rear end door opener
• Keyless entry transmitter (unlock signal)
• Rear end door opener switch
Door lock canceller • SDM (air bag deployment signal) • Each door lock actuator
• Key reminder switch • Theft deterrent light (located in
Theft deterrent light
information display or clock)

Body Electrical Control System Check

S6RW0DA204002

Step Action Yes No

1 ) Customer complaint analysis Go to Step 2. Perform customer
1) Perform customer complaint analysis. complaint analysis.

Was customer complaint analysis performed?

2 ) Problem symptom confirmation Go to Step 3. Go to Step 7.
1) Perform problem symptom confirmation.

Does trouble recur?

3 ) DTC check Go to Step 4. Go to Step 5.
1) Check DTC.

Is it malfunction code?
4 ) Troubleshooting for DTC Go to Step 7. Check and repair
1) Check and repair according to DTC diag. flow. malfunction part(s).

Are check and repair completed?

5 ) Body electrical control system symptom diagnosis Repair or replace Go to Step 6.
1) Perform check and repair referring to “Symptom malfunction part(s).
Diagnosis” of system having a trouble.

Is there faulty condition?

6 ) Check for intermittent problem Repair or replace Go to Step 7.
1) Check for intermittent problem. malfunction part(s).

Is there faulty condition?

7 ) Final confirmation test Go to Step 4. End.
1) Clear DTC referring to “DTC Clearance”.
2) Check DTC referring to “DTC Check”.

Is there any DTC?

Customer Complaint Analysis

Record details of the problem (failure, complaint) and how it occurred as described by the customer.
For this purpose, use of such a questionnaire form as shown in the figure will facilitate collecting information to the
point required for proper analysis and diagnosis.
 Edited by Foxit PDF Editor
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Company, System: 10B-10
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Customer questionnaire (example)

Customer s name: Model: VIN:

Date of issue: Date Reg: Date of problem: Mileage:

Power door lock system does not operate

Keyless entry system does not operate
Rear end door window defogger does not operate
Rear wiper does not operate
Problem Symptoms Rear end door opener does not operate
Warning buzzer does not sound
Interior light does not light
Theft deterrent light does not flush
Other

Frequency of Occurrence Continuous / Intermittent ( times a day, a month)

/ Other
Weather:
Environmental Condition Fine / Cloudy / Rain / Snow / Other
Temperature: ( F)

Diagnostic Trouble Code Normal code / Malfunction code ( )

I5RS0DA20006-01

Problem Symptom Confirmation

Check if what the customer claimed in “Customer Questionnaire” is accurately found in the vehicle. If that symptom is
found, check whether the symptom is identified as a failure. (This step should be shared with the customer if possible.)

DTC Check
Check DTC stored in BCM memory referring to “DTC Check”, record it and then clear it referring to “DTC Clearance”.
DTC indicates malfunction that occurred in the system but does not indicate whether it exists now or it occurred in the
past and the normal condition has been restored now. To check which case applies, clear DTC once and check
whether or not any fault exists.

Troubleshooting for DTC

Based on the DTC indicated in Step 3 and referring to applicable DTC flow, locate the cause of the trouble, namely in
a sensor, wire harness, connector, BCM or other part and repair or replace faulty parts.

Body Electrical Control System Symptom Diagnosis

Check the parts or system suspected as a possible cause referring to symptom diagnosis of each system.

Check for Intermittent Problem

Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to
“Intermittent and Poor Connection Inspection in Section 00”.

Final Confirmation Test

Confirm that the problem symptom has gone and the body electrical control system is free from any abnormal
conditions. If what has been repaired is related to the malfunction DTC, check DTC again and confirm that no DTC is
indicated.
 Edited by Foxit PDF Editor
10B-11 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Scan Tool Data
S6RW0DA204003
Normal condition /
Scan tool data Condition
reference value
Vehicle Speed ) At stop with ignition switch turned ON 0 km/h
–40 °C – 70 °C
Outside air Temp ) Reference value is relative to outside air temperature
(–40 °F – 158 °F)
Battery Voltage ) At specified idle speed after warming up 10 – 14 V
80 °C – 100 °C
Coolant Temp ) At specified idle speed after warming up
(176 °F – 212 °F)
Desired idle speed
Engine Speed ) Engine idling with no load applied after warming up
± 50 rpm
Fuel Consumption ) At specified idle speed after warming up 0.0 km/l
Ignition key inserted in ignition key cylinder Key in
Key Reminder Sw )
Ignition key pulled out from ignition key cylinder Pulled
Rear wiper switch at ON position and ignition switch turned ON ON
Rear Wiper Sw ) Rear wiper switch at INT position and ignition switch turned ON INT
Rear wiper switch at OFF position and ignition switch turned ON OFF
Key cylinder switch of driver side door at lock position LOCK
Door key Sw ) Key cylinder switch of driver side door not turned Neutral
Key cylinder switch of driver side door at unlock position Unlock
Lock side of manual door lock switch pressed LOCK
Door Lock Sw ) Manual door lock switch not pressed Neutral
Unlock side of manual door lock switch pressed Unlock
Driver side door open Open
Driv Door Sw )
Driver side door closed Close
Doors other than driver side door open Open
Pass Door Sw )
Doors other than driver side door closed Close
Brake fluid level at MIN level or higher Normal
Brake Fluid Level )
Brake fluid level lower than MIN level Low
Parking brake lever pulled ON
Parking Brake Sw )
Parking brake lever released OFF
Rear end door window defogger switch pressed with engine running ON
Rear Defogger Sw ) Rear end door window defogger switch not pressed with engine
OFF
running
Lighting switch at HEAD position ON
Headlight Sw )
Lighting switch at OFF position OFF
Lighting switch at HEAD or CLEARANCE position ON
Tail Light Sw )
Lighting switch at OFF position OFF
Lighting switch at HEAD position and front fog light switch at ON
ON
position
Front Fog Light Sw )
Lighting switch at HEAD position and front fog light switch at OFF
OFF
position
Driver side seat belt fastened Fasten
Driv Seat belt Sw )
Driver side seat belt unfastened Unfasten
Rear end door opener switch pressed ON
Rear end door opener )
Rear end door opener switch not pressed OFF
Engine at stop with ignition switch turned ON ON
Charge light )
Engine running OFF
Engine at stop with ignition switch turned ON ON
Oil pressure switch )
Engine running OFF
A/C and ignition switch turned ON ON
A/C Switch )
A/C switch turned OFF OFF
 Edited by Foxit PDF Editor
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Company, System: 10B-12
For Evaluation Only.
Scan Tool Data Definitions
Vehicle Speed (km/h, mph): This parameter indicates the vehicle speed computed by ECM.
Outside air Temp (°C, °F): It is detected by outside air temperature sensor.
Battery Voltage (V): This parameter indicates battery positive voltage inputted to BCM.
Coolant Temp (Engine coolant temperature) (°C, °F): It is detected by engine coolant temperature sensor.
Engine Speed (RPM): It is computed by reference pulse signals from CMP sensor.
Fuel Consumption (km/l): This parameter indicates the fuel consumption computed by ECM.
Key Reminder Sw (Key reminder switch) (Pulled / Key in): This parameter indicates the state of the key reminder
switch.
Rear Wiper Sw (Rear wiper switch) (ON / INT / OFF): This parameter indicates the state of the rear wiper switch.
Door key Sw (Door key cylinder switch) (Lock / Neutral / Unlock): This parameter indicates the state of the door
key cylinder switch.
Door Lock Sw (Manual door lock switch) (Lock / Neutral / Unlock): This parameter indicates the state of the
manual door lock switch.
Driv Door Sw (Driver side door switch) (Open / Close): This parameter indicates the state of the driver side door
switch.
Pass Door Sw (Other than driver side door switch) (Open / Close): This parameter indicates the state of the door
switches other than driver side door switch.
Brake Fluid Level (Low / Normal): Low: Brake fluid level is lower than specified level.
Normal: Brake fluid level is higher than MIN level.
Parking Brake Sw (Parking brake switch) (ON / OFF): ON: Parking brake lever is pulled up.
OFF: Parking lever is released.
Rear Defogger Sw (Rear end door window defogger switch) (ON / OFF): This parameter indicates the state of
the rear end door window defogger switch.
Headlight Sw (Headlight switch) (ON / OFF) (Junction block without BCM type): This parameter indicates the
state of the lighting switch.
Tail Light Sw (Lighting switch) (ON / OFF): This parameter indicates the state of the lighting switch.
Front Fog Light Sw (Front fog light switch) (ON / OFF) (Junction block without BCM type): This parameter
indicates the state of the front fog light switch.
Driv Seatbelt Sw (Driver seat belt switch) (Fasten / Unfasten): This parameter indicates the state of the driver
side seat belt buckle switch.
Rear end door opener (Rear end door opener switch) (ON / OFF): This parameter indicates the state of the rear
end door opener switch.
Charge light (ON / OFF): This parameter indicates the state of the charge system monitor switch.
Oil pressure switch (ON / OFF): This parameter indicates the state of the oil pressure switch.
A/C Switch (ON / OFF): This parameter indicates the state of the air conditioning switch.

Diagnosis Using Output Test Function of SUZUKI Scan Tool

SUZUKI scan tool has the output test function which can force operation of following actuators and relays of the
system controlled by BCM. When a malfunction is found in the system controlled by BCM, execute the output test
which enables easy judgment whether the malfunction is on the input side or output side of BCM. For detailed
information on operation of SUZUKI scan tool, refer to “SUZUKI Scan Tool Operator’s Manual”.
Output Teat Item Controlled Parts
Hazard Warning Light Turn signal and hazard warning relay
Interior (Dome) Light Interior (Dome) light (when interior light switch is at DOOR position)
Tail Light*1 Tail light relay
Front Fog Light*1 Front fog light relay (when lighting switch is at HEAD position)
Rear defogger Rear end door window defogger relay
Dead lock Each door lock actuator
Rear end door open Rear end door opener relay
Door Each door lock actuator
Warning Buzzer Warning buzzer (in BCM)
Rear wiper Rear wiper relay
Alarm indicator Theft deterrent light (in information display or clock)
Horn*2 Horn relay

NOTE
*1: Junction block without BCM type
*2: With security alarm system
 Edited by Foxit PDF Editor
10B-13 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
DTC Table
S6RW0DA204004
DTC
DTC (indicated DTC (displayed on
(displayed on
by theft odometer in Detected item Detecting condition
SUZUKI scan
deterrent light) combination meter)
tool)
NO DTC 0000 0000 — No DTC detected
) B1133 1133 b1133 Battery voltage too high Battery voltage too high
Outside air temperature
) B1141 1141 b1141 (ambient temperature) Sensor output voltage too high
sensor circuit open
Outside air temperature
(ambient temperature)
) B1142 1142 b1142 Sensor output voltage too low
sensor circuit short to
ground
Air bag communication Air bag communication circuit
) B1150 1150 b1150
circuit malfunction open or short to ground
Air bag deployment signal Air bag deployment signal
) B1157 1157 b1157
input inputted
) B1170 1170 b1170 EEPROM access error Memory error
Transmitting and receiving
Control module
) U0073 0073 U0073 error of BCM for specified time
communication bus off
continuously
Receiving error of BCM from
Lost communication with
) U0100 0100 U0100 ECM for specified time
ECM
continuously
Receiving error of BCM from
Lost communication with
) U0101 0101 U0101 TCM for specified time
TCM
continuously
Lost communication with Receiving error of BCM from
) U0155 0155 U0155 instrument panel cluster combination meter for
(IPC) control module specified time continuously
Receiving error of BCM from
Lost communication with
) U1144 1144 U1144 keyless start control module
keyless start control module
for specified time continuously
 Edited by Foxit PDF Editor
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Company, System: 10B-14
For Evaluation Only.
DTC Check
S6RW0DA204005
Using SUZUKI Scan Tool
1) Prepare SUZUKI scan tool.
2) With ignition switch turned OFF, connect it to data link connector (DLC) located on underside of instrument panel
of driver’s side.
Special tool
(A): SUZUKI scan tool

(A)

I5RW0AA20008-02

3) Turn ignition switch ON.

4) Read DTC according to instructions displayed on SUZUKI scan tool and print it or write it down.
Refer to SUZUKI scan tool operator’s manual for further details.
If communication between SUZUKI scan tool and BCM is not possible, check if SUZUKI scan tool is
communicable by connecting it to BCM in another vehicle. If communication is possible in this case, SUZUKI scan
tool is in good condition. Then check data link connector and serial data line (circuit) in the vehicle with which
communication was not possible.
5) After completing the check, turn ignition switch off and disconnect SUZUKI scan tool from data link connector.

Without Using SUZUKI Scan Tool

1) Turn ignition switch to OFF position.
2) Perform following Steps a) to d) within 10 seconds after ignition switch is turned ON and engine stops.
a) Turn headlight switch to “SMALL” position.
b) Turn headlight switch to “OFF” position.
c) Repeat Steps a) and b) 2 times.
d) Press and release driver side door switch 3 times.
 Edited by Foxit PDF Editor
10B-15 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
3) Check DTC displayed on odometer of combination meter or read flashing pattern of theft deterrent light which
represents DTC as shown in the following example and write it down.
When more than 2 DTCs are stored in memory, flashing for each DTC starts with the smallest DTC number in
increasing order. Also, DTC is indicated repeatedly until the ignition switch is turned OFF.

[A] 1
0 0 0 0
A

B
T2 T2 T2 T2

[B]
1 1 3 3
A

B
T2 T2 T2

T1 T1 T1 T1

[C] 2
1 1 3 3 1 1 6 0
A

B
T2 T2 T2 T3 T2 T2 T2 T2

T1 T1 T1 T1 T1 T1 T1
I5RW0AA20009-01

[A]: No DTC (No. 0000) A: Indicator lamp turned ON T2: 1.0 seconds 2. Odometer
[B]: DTC B1133 (No. 1133) B: Indicator lamp turned OFF T3: 3.0 seconds
[C]: When 2 DTCs are detected T1: 0.3 seconds 1. Theft deterrent light

4) After completing the check, turn ignition switch to OFF position.

DTC Clearance
S6RW0DA204006
After repair or replace of malfunction part(s), clear all DTCs by performing the following procedure.

Using SUZUKI Scan Tool

1) Connect SUZUKI scan tool to data link connector in the same manner as when making this connection for DTC
check.
2) Turn ignition switch ON and engine stops.
3) Erase DTC according to instructions displayed on scan tool. Refer to scan tool operator’s manual for further
details.
4) After completing the clearance, turn ignition switch off and disconnect scan tool from data link connector.

Without Using SUZUKI Scan Tool

1) Turn ignition switch to OFF position.
2) Perform following Steps a) to d) within 10 seconds after ignition switch is turned ON and engine stops.
a) Turn headlight switch to “SMALL” position.
b) Turn headlight switch to “OFF” position.
c) Repeat Steps a) and b) 3 times.
d) Press and release driver side door switch 4 times.
3) After completing above Steps, confirm that no malfunction DTC is detected.
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-16
For Evaluation Only.
BCM Power Circuit and Ground Circuit Check
S6RW0DA204007
Wiring Diagram

1
+BB

+B E324-2 WHT
G273-5 BLU 2
G273-2 GRN
IG1 G272-9 BLK
G271-3 BLK/ORN 3
L314-4 BLK/ORN

[A] G272 G271 [A] G273 [A] E324 [A] L314

10 9 8 7 6 5 4 3 2 1 6 5 4 3 2 1 2 1 2 1 9 8 7 6 5 4 3 2 1
20 19 18 17 16 15 14 13 12 11 12 11 10 9 8 7 6 5 4 3
18 17 16 15 14 13 12 11 10

I6RW0CA20006-02

[A]: Junction block connector viewed from harness side 2. Ignition switch
1. Junction block 3. Battery

Troubleshooting
Step Action Yes No
1 Fuse check Go to Step 2. Replace fuse and check
1) Turn ignition switch to OFF position. for short circuit to
ground.
2) Check circuit fuses for condition.

Are circuit fuses in good condition?

2 Power supply circuit check Go to Step 3. Repair power supply
1) Disconnect connectors from junction block. circuit.
2) Check for proper connection to junction block connector
at terminal “E324-2”.
3) If OK, then measure voltage between “E324-2” terminal
of junction block connector and vehicle body ground.

Is voltage 10 – 14 V?
3 Power supply circuit check Go to Step 4. Repair power supply
1) Check for proper connection to junction block connector circuit.
at terminals “G273-2” and “G273-5”.
2) If OK, turn ignition switch to ON position.
3) Measure voltage between following terminals.
• Between “G273-2” terminal of junction block
connector and vehicle body ground
• Between “G273-5” terminal of junction block
connector and vehicle body ground

Is each voltage 10 – 14 V?
 Edited by Foxit PDF Editor
10B-17 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Step Action Yes No
4 Ground circuit check BCM power supply Repair ground circuit.
1) Turn ignition switch to OFF position. circuit and ground circuit
are in good condition.
2) Check for proper connection to junction block connector
at terminals “G271-3”, “G272-9” and “L314-4”.
3) If OK, then measure resistance between following
terminals.
• Between “G271-3” terminal of junction block
connector and vehicle body ground
• Between “G272-9” terminal of junction block
connector and vehicle body ground
• Between “L314-4” terminal of junction block connector
and vehicle body ground

Is each resistance 2 Ω or less?

DTC B1133 (DTC No. 1133): Battery Voltage Too High

S6RW0DA204008
Wiring Diagram
Refer to “BCM Power Circuit and Ground Circuit Check”.

DTC Detecting Condition and Possible Cause

DTC detecting condition Possible cause
Power voltage supplied from battery to BCM is • Charging system malfunction
higher than 16V. • BCM malfunction

Flow Test Description

Step 1: Check charging system

DTC Troubleshooting
Step Action Yes No
1 Charging system operation check Substitute a known Repair charging system.
1) Check generator for operation referring to “Generator good BCM (included in
Test (Overcharged Battery Check) in Section 1J”. junction block) and
recheck.
Is it in good condition?
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-18
For Evaluation Only.
DTC B1141 / DTC B1142 (No. 1141 / No. 1142) Outside Air Temperature (Ambient Temp.) Sensor
Circuit Malfunction
S6RW0DA204009
Wiring Diagram

2
5V
1 [A] E04
YEL/RED E04-10
7 6 5 4 3 2 1
14 13 12 11 10 9 8
YEL/BLK E04-8

I6RW0CA20007-01

[A]: BCM connector viewed from harness side 2. BCM

1. Outside air temperature sensor

DTC Detecting Condition and Possible Cause

DTC detecting condition Possible cause
DTC B1141 (DTC No. 1141): • Open in outside air temperature sensor circuit
Input signal from outside air temperature sensor is higher • Outside air temperature sensor malfunction
than 4.88 V.
• BCM malfunction
DTC B1142 (DTC No. 1142): • Short in outside air temperature sensor circuit
Input signal from outside air temperature sensor is lower • Outside air temperature sensor malfunction
than 0.1 V.
• BCM malfunction

Flow Test Description

Step 1: Check whether malfunction is in outside air temperature sensor.
Step 2: Check outside air temperature sensor circuit.

DTC Troubleshooting
Step Action Yes No
1 Outside air temperature sensor check Go to Step 2. Replace outside air
1) Turn ignition switch to OFF position. temperature sensor.
2) Disconnect connector from outside air temperature
sensor.
3) Check outside air temperature sensor for resistance
referring to “Outside Air Temperature Sensor Inspection
(If Equipped) in Section 9C”.

Is it in good condition?
2 Outside air temperature sensor circuit check Substitute a known- Repair circuit.
1) Disconnect connector from BCM and check for proper good BCM (included in
terminal connection to BCM connector. junction block) and
recheck.
2) If connections are OK, check outside air temperature
sensor circuit for open, short and high resistance.

Is each circuit in good condition?

 Edited by Foxit PDF Editor
10B-19 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction
S6RW0DA204010
Wiring Diagram

2
5V
[A] L313 1

4 3 2 1 L313-2 YEL L04-37

I6RW0CA20008-01

[A]: Junction block connector viewed from harness side 2. BCM

1. SDM

DTC Detecting Condition and Possible Cause

DTC detecting condition Possible cause
After ignition switch is turned ON, abnormal signal is fed • Air bag communication circuit open or short
from SDM to BCM. • SDM malfunction
• BCM malfunction

Flow Test Description

Step 1: Check air bag communication circuit.
Step 2: Check air bag communication circuit.

DTC Troubleshooting
Step Action Yes No
1 Air bag communication circuit check Go to Step 2. Repair circuit.
1) Turn ignition switch to OFF position.
2) Disconnect connectors from junction block and SDM.
3) Check for proper terminal connection to BCM and SDM
connectors.
4) If connections are OK, check air bag communication
circuit for open, short and high resistance.

Is circuit in good condition?

2 Air bag communication circuit check Substitute a known- Substitute a known-
1) Turn ignition switch to OFF position. good SDM and recheck. good BCM (included in
junction block) and
2) Connect connectors to junction block.
recheck.
3) Turn ignition switch to ON position.
4) Measure voltage between “L313-2” terminal of junction
block connector and vehicle body ground.

Is voltage 4 – 6 V?
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-20
For Evaluation Only.
DTC B1157 (No. 1157) Air Bag Deployment Signal Input
S6RW0DA204011
Wiring Diagram
Refer to “DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction”.

DTC Detecting Condition and Possible Cause

DTC detecting condition Possible cause
Air bag deployment signal is fed from SDM to BCM. • Air bag component parts
• BCM malfunction

Flow Test Description

Step 1: Check DTC for SDM.

DTC Troubleshooting
Step Action Yes No
1 DTC check of SDM Go to “DTC B1021: Substitute a known-
1) Check DTC stored in SDM referring to “DTC Check in Front Air Bag good BCM (included in
Section 8B”. Deployment Record in junction block) and
Section 8B”. recheck.
Is DTC B1021 detected?

DTC B1170 (No. 1170): EEPROM Access Error

S6RW0DA204012
DTC Detecting Condition and Possible Cause
DTC detecting condition Possible cause
Data write error or check sum error. BCM malfunction

DTC Troubleshooting

NOTE
Before performing steps below, be sure to perform “Body Electrical Control System Check”.

1) Ignition switch OFF.

2) Replace BCM.
3) Repeat BCM Check Flow Table.

DTC U0073 (No. 0073): Control Module Communication Bus Off

S6RW0DA204013
Refer to “Troubleshooting for CAN-DTC in Section 1A”.

DTC U0100 (No. 0100): Lost Communication with ECM

S6RW0DA204014
Refer to “Troubleshooting for CAN-DTC in Section 1A”.

DTC U0101 (No. 0101): Lost Communication with TCM

S6RW0DA204018
Refer to “Troubleshooting for CAN-DTC in Section 1A”.

DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control Module
S6RW0DA204015
Refer to “Troubleshooting for CAN-DTC in Section 1A”.

DTC U1144 (No. 1144): Lost Communication with Keyless Start Control Module
S6RW0DA204016
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
 Edited by Foxit PDF Editor
10B-21 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Inspection of BCM and Its Circuits
S6RW0DA204017
BCM and its circuits can be checked at BCM wiring couplers by measuring voltage and resistance.

! CAUTION
BCM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to BCM
with couplers disconnected from it.

Voltage Check
1) Disconnect negative cable (–) at battery.
2) Remove BCM (included in junction block) referring to “BCM (Included in Junction Block) Removal and Installation”.
3) Connect connectors to BCM (1) and junction block (2).
4) Check voltage at each terminal number of couplers connected.
For connector and terminal number, refer to “Connector Layout Diagram of BCM and Junction Block”.

2
2

I4RS0AA20030-01

NOTE
• As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when
ignition switch is ON.
• Voltage with asterisk (*) can not be measured by voltmeter because it is pulse signal.
Check it with oscilloscope if necessary.

BCM connector “L01”

Terminal Circuit Normal voltage Condition
Unlock signal is output for passenger side
Passenger side door lock 10 – 14 V
door lock actuator
L01-1 actuator control (Unlock) (if
Unlock signal is not output for passenger side
equipped) 0V
door lock actuator
L01-2 — — —
10 – 14 V Rear end door is closed
L01-3 Rear end door switch
0V Rear end door is opened
Rear end door opener switch 10 – 14 V Rear end door opener switch is not pushed
L01-4
(if equipped) 0V Rear end door opener switch is pushed
Manual door lock switch is at any position
Manual door lock switch 10 – 14 V
L01-5 other than unlock position
(Unlock) (if equipped)
0V Manual door lock switch is at unlock position
*0 – 3 V
↑↓ Refer to “Reference waveform No. 1: ”
L01-6 Parking brake switch 10 – 14 V
Ignition switch is at ON position and parking
0V
brake lever is pulled up
10 – 14 V Driver side door is closed
L01-7 Driver side door switch
0V Driver side door is opened
L01-8 — — —
L01-9 — — —
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-22
For Evaluation Only.
Terminal Circuit Normal voltage Condition
Unlock signal is output for driver side door
Driver side door lock 10 – 14 V
lock actuator
L01-10 actuator control (Unlock) (if
Unlock signal is not output for driver side
equipped) 0V
door lock actuator
Rear end door actuator motor is not in
Rear end door opener 0V
L01-11 operation
actuator control (if equipped)
10 – 14 V Rear end door actuator motor is in operation
Manual door lock switch is at any position
Manual door lock switch 10 – 14 V
L01-12 other than lock position
(Lock) (if equipped)
0V Manual door lock switch is at lock position
L01-13 — — —
*0 – 3 V
↑↓ Refer to “Reference waveform No. 2: ”
L01-14 Driver side seat belt switch 10 – 14 V
Ignition switch is at ON position and driver
0V
side seat belt is unfastened
Rear right and left side door and passenger
Door switch (other than 10 – 14 V
side door are closed
L01-15 driver side door and rear end
Any one of the door is opened (except driver
door) 0V
side door and rear end door)
Driver side door key cylinder switch is at any
10 – 14 V
Driver side door key cylinder position other than lock position
L01-16
switch (Lock) (if equipped) Driver side door key cylinder switch is at lock
0V
position
Driver side door key cylinder switch is at any
10 – 14 V
Driver side door key cylinder position other than unlock position
L01-17
switch (Unlock) (if equipped) Driver side door key cylinder switch is at
0V
unlock position
L01-18 — — —

BCM connector “E04”

Terminal Circuit Normal voltage Condition
CAN communication line (high)
E04-1 *2.5 – 3.6 V
for ABS control module
Refer to “Reference waveform No. 3: ”
CAN communication line (low)
E04-2 *1.6 – 2.5 V
for ABS control module
E04-3 — — —
10 – 14 V Engine is running
E04-4 Generator “L” terminal
0V Ignition switch is at ON position
*0 – 3 V
↑↓ Refer to “Reference waveform No. 1: ”
10 – 14 V
E04-5 Brake fluid level switch
Ignition switch is at ON position, parking brake
0V lever is released and brake fluid level is lower
than MIN level
E04-6 — — —
E04-7 — — —
Sensor ground for outside air
E04-8 temperature sensor (if 0V —
equipped)
Serial communication line of
E04-9 data link connector for ABS 7 – 12 V Ignition switch is at ON position
control module
Outside air temperature sensor Ignition switch is at ON position and outside
E04-10 About 1.5 V
(if equipped) air temperature approx. 20 °C (68 °F)
*3 – 14 V Refer to “Reference waveform No. 4: ”
E04-11 Oil pressure switch Ignition switch is at ON position and engine is
0V
at stop
E04-12 — — —
 Edited by Foxit PDF Editor
10B-23 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Terminal Circuit Normal voltage Condition
E04-13 — — —
E04-14 — — —

BCM connector “G04”

Terminal Circuit Normal voltage Condition
CAN communication line (low)
G04-1 *1.6 – 2.5 V
for DLC
CAN communication line (low)
G04-2 *1.6 – 2.5 V
for each control module
Refer to “Reference waveform No. 3: ”
CAN communication line
G04-3 *2.5 – 3.6 V
(high) for DLC
CAN communication line
G04-4 *2.5 – 3.6 V
(high) for each control module
Serial communication line of
G04-5 7 – 12 V Ignition switch is at ON position
data link connector
G04-6 — — —
G04-7 — — —
10 – 14 V Theft deterrent light is not lit up
G04-8 Theft deterrent light
0V Theft deterrent light is lit up
G04-9 — — —
G04-10 — — —
Serial communication line for *0 – 1 V
G04-11 information display and HVAC ↑↓ Refer to “Reference waveform No. 5: ”
control module (if equipped) 10 – 14 V
Ground for keyless entry
G04-12 0V —
receiver (if equipped)
Power supply for keyless
G04-13 4–6V Ignition switch is at all positions
entry receiver (if equipped)
*0 – 1 V
Signal for keyless entry
G04-14 ↑↓ Refer to “Reference waveform No. 6: ”
receiver (if equipped)
4–6V
*0 – 1 V
G04-15 Vehicle speed signal output ↑↓ Refer to “Reference waveform No. 7: ”
4 – 6V
10 – 14 V Ignition key is inserted to ignition key cylinder
G04-16 Key reminder switch Ignition key is pulled out from ignition key
0V
cylinder
*3 – 14 V Refer to “Reference waveform No. 8: ”
Rear end door window
G04-17 Ignition switch is at ON position and rear end
defogger switch 0V
door window defogger switch is pushed
*3 – 14 V Refer to “Reference waveform No. 8: ”
Ignition switch is at ON position, blower speed
G04-18 A/C switch (if equipped)
0V selector is at any position other than OFF
position and A/C switch is at ON position
G04-19 — — —
G04-20 — — —
*0 – 1 V
↑↓ Refer to “Reference waveform No. 9: ”
G04-21 Rear wiper INT switch 10 – 14 V
Ignition switch is at ON position and rear
0V
wiper switch is at INT position
*0 – 1 V
↑↓ Refer to “Reference waveform No. 9: ”
G04-22 Rear wiper low switch 10 – 14 V
Ignition switch is at ON position and rear
0V
wiper switch is at LOW position
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-24
For Evaluation Only.

Junction block connector “E324”

Terminal Circuit Normal voltage Condition
E324-2 Backup power source 10 – 14 V Ignition switch is at all positions

Junction block connector “E325”

Terminal Circuit Normal voltage Condition
10 – 14 V Horn switch is at ON position
E325-3 Horn
0V Horn switch is at OFF position

Junction block connector “G271”

Terminal Circuit Normal voltage Condition
G271-3 Ground for BCM 0V Ignition switch is at all positions
Engine is running and rear end door window
10 – 14 V
Rear end door window defogger indicator light is lit up
G271-7
defogger indicator light Engine is running and rear end door window
0V
defogger indicator light is not lit up

Junction block connector “G272”

Terminal Circuit Normal voltage Condition
10 – 14 V Horn switch is not pushed
G272-3 Horn switch
0V Horn switch is pushed
Engine is running (with DRL model) or lighting
10 – 14 V switch is at any position other than OFF
G272-7 Lighting switch
position
0V Lighting switch is at OFF position
G272-9 Ground for BCM 0V Ignition switch is at all positions
10 – 14 V Hazard warning switch is at OFF position
Hazard warning switch is at ON position or
G272-11 Hazard warning switch
0V lock or unlock button of keyless entry
transmitter (answer back control) is pushed

Junction block connector “G273”

Terminal Circuit Normal voltage Condition
10 – 14 V Ignition switch is at ON position
G273-2 Power source (IG) Ignition switch is at any position other than
0V
ON position
10 – 14 V Ignition switch is at ACC or ON position
G273-5 Power source (ACC) Ignition switch is at any position other than
0V
ACC or ON position

Junction block connector “L312”

Terminal Circuit Normal voltage Condition
Power supply for rear wiper Ignition switch is at ON position
L312-4 10 – 14 V
motor
Interior light switch is at DOOR position and
10 – 14 V
interior light is not lit up
L312-5 Interior light
Interior light switch is at DOOR position and
0V
interior light is lit up

Junction block connector “L313”

Terminal Circuit Normal voltage Condition
*0 – 1 V
L313-2 Air bag communication line ↑↓ Refer to “Reference waveform No. 10: ”
4–6V
Serial communication line of
L313-3 7 – 12 V Ignition switch is at ON position
data link connector for SDM
 Edited by Foxit PDF Editor
10B-25 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.

Junction block connector “L314”

Terminal Circuit Normal voltage Condition
L314-4 Ground for BCM 0V Ignition switch is at all positions
Engine is running and rear end door window
10 – 14 V
Right side door mirror heater defogger is in operation
L314-6
(if equipped) Engine is running and rear end door window
0V
defogger is not in operation
Engine is running and rear end door window
10 – 14 V
Left side door mirror heater (if defogger is in operation
L314-7
equipped) Engine is running and rear end door window
0V
defogger is not in operation
Engine is running and rear end door window
10 – 14 V
Rear end door window defogger is in operation
L314-8
defogger wire Engine is running and rear end door window
0V
defogger is not in operation
Ignition switch is at ON position and rear
10 – 14 V
wiper is not in operation
L314-9 Rear wiper control
Ignition switch is at ON position and rear
0V
wiper is in operation

Junction block connector “L315”

Terminal Circuit Normal voltage Condition
Driver side key cylinder is turned to lock twice
10 – 14 V
with in 3 seconds
Door lock actuator control Manual door lock switch is at any position
L315-1
(Dead lock) (if equipped) other than LOCK position and driver side door
0V
key cylinder switch is at any position other
than LOCK position
Unlock signal is output for rear door lock
10 – 14 V
Door lock actuator control actuator
L315-9
(Unlock) (if equipped) Unlock signal is not output for rear door lock
0V
actuator
10 – 14 V Lock signal is output for all door lock actuators
Door lock actuator control
L315-10 Lock signal is not output for all door lock
(Lock) (if equipped) 0V
actuators
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-26
For Evaluation Only.
Reference waveform No. 1 Reference waveform No. 3
Parking brake or brake fluid level switch signal (1) CAN communication signal
Measurement terminal Parking brake switch Measurement terminal CAN communication signal for
CH2: “L01-6” to “G271-3” ABS control module
Brake fluid level switch CH2: “E04-1” to “G271-3”
CH2: “E04-5” to “G271-3” CH3: “E04-2” to “G271-3”
Oscilloscope setting CH1: 5 V / DIV CAN communication signal for
TIME: 10 ms / DIV DLC
Measurement Parking brake switch: CH2: “G04-3” to “G271-3”
condition • Ignition switch is at ON CH3: “G04-1” to “G271-3”
position, parking brake lever CAN communication signal for
is released each control module
Brake fluid level switch CH2: “G04-4” to “G271-3”
CH3: “G04-2” to “G271-3”
• Ignition switch is at ON
Oscilloscope setting CH2: 1 V/DIV
position, brake fluid level is in
CH3: 1 V/DIV
normal
TIME: 40 µs/ DIV
Measurement Ignition switch is at ON position
condition

I4RS0AA20018-02

Reference waveform No. 2

I4RS0AA20017-02
Driver seat belt switch signal (1)
1. CAN communication line signal (High)
Measurement terminal CH2: “L01-14” to “G271-3” 2. CAN communication line signal (Low)
Oscilloscope setting CH2: 5 V/DIV
TIME: 4 ms/DIV Reference waveform No. 4
Measurement Ignition switch is at ON position Oil pressure switch signal (1)
condition and driver side seat belt is
Measurement terminal CH2: “E04-11” to “G271-3”
fastened
Oscilloscope setting CH2: 5 V / DIV
TIME: 10 ms / DIV
Measurement Engine is running and oil
condition pressure is in normal condition

I4RS0AA20016-02

I4RS0AA20018-02
 Edited by Foxit PDF Editor
10B-27 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Reference waveform No. 5 Reference waveform No. 7
Information display and HVAC control module serial Vehicle speed pulse output signal (1)
communication signal (1) Measurement terminal CH1: “G04-15” to “G271-3”
Measurement terminal CH2: “G04-11” to “G271-3” Oscilloscope setting CH1: 2 V / DIV
Oscilloscope setting CH2: 5 V / DIV TIME: 100 ms / DIV
TIME: 2 ms / DIV Measurement Vehicle speed at 10 km/h (6
Measurement Ignition switch is at ON position condition mph)
condition

I5RW0AA20014-01

I4RS0AA20021-02
Reference waveform No. 8
Reference waveform No. 6 A/C or rear end door window defogger switch signal (1)
Keyless entry receiver signal (1) Measurement terminal Rear end door window
Measurement terminal CH2: “G04-14” to “G271-3” defogger switch
Oscilloscope setting CH2: 2 V / DIV CH2: “G04-17” to “G271-3”
TIME: 200 ms / DIV A/C switch
Measurement Lock or unlock button of CH2: “G04-18” to “G271-3”
condition keyless entry transmitter is Oscilloscope setting CH2: 5 V/DIV
pushed TIME: 10 ms/DIV
Measurement Rear end door window
condition defogger switch:
• Ignition switch is at ON
position and rear end door
window defogger switch is
not pushed
A/C switch:
• Ignition switch is at ON
position, A/C switch or
blower speed selector is at
OFF position

I4RS0AA20022-02

I4RS0AA20023-02
 Edited by Foxit PDF Editor
BodySoftware
Copyright (c) by Foxit Electrical Control 2004
Company, System: 10B-28
For Evaluation Only.
Reference waveform No. 9 Reference waveform No. 10
Rear wiper switch signal (1) SDM communication signal (1)
Measurement terminal Rear wiper INT switch Measurement terminal CH2: “L314-2” to “G271-3”
CH2: “G04-21” to “G271-3” Oscilloscope setting CH2: 2 V / DIV
Rear wiper LOW switch TIME: 400 ms / DIV
CH2: “G04-22” to “G271-3” Measurement Ignition switch is at ON
Oscilloscope setting CH2: 5 V/DIV condition position
TIME: 10 ms/DIV
Measurement Rear wiper INT switch:
condition • Ignition switch is at ON
position and rear wiper
switch is at any position
other than INT position
Rear wiper LOW switch:
• Ignition switch is at ON
position and rear wiper
switch is at any position
other than LOW position

I4RS0AA20026-02

I4RS0AA20024-02

Repair Instructions
BCM (Included in Junction Block) Removal and
Installation
S6RW0DA206001
! CAUTION
Do not attempt removal of BCM from junction
block as it may cause contact failure.
If there is faulty condition in BCM, replace
junction block assembly.

Removal 3
1) Disconnect negative cable from battery.
1 2
2) Disable air bag system referring to “Disabling Air
Bag System in Section 8B”.
4
3) Remove dash side trim (1) and steering column hole
cover (2).
4) Remove junction block mounting nuts (3). 5

3
I5RW0AA20015-01

4. BCM 5. Junction block

 Edited by Foxit PDF Editor
10B-29 Body Electrical Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
5) Disconnect connectors from BCM and junction
block. 2
6) Detach wiring harness clamp from junction block.
1
Installation
Reverse removal procedure for installation, noting
following points. 3

• Connect connectors securely. 4

• Enable air bag system referring to “Enabling Air Bag

System in Section 8B”.
• With keyless entry system (other than keyless start
model), if BCM is replaced, register transmitter code
into BCM, referring to “Programming Transmitter
I7JB01A20007-01
Code for Keyless Entry System (Other than Keyless
Start Model) in Section 9F”. 4) When Step 3) is completed, the mode changes to
the next one automatically. The warning buzzer
(located in BCM) sounds by the number of specified
Security Alarm Mode Selection Procedure (If
for each mode as follows.
Equipped)
S6RW0DA206005 • Changed from A mode to B mode: Buzzer sounds
Security alarm mode can be selected by performing the 4 times
following procedure. • Changed from B mode to A mode: Buzzer sounds
1) Confirm that all doors are closed, all doors are once
unlocked and ignition key is inserted in ignition key
cylinder. Outside Air Temperature Sensor Removal and
2) Remove ignition key from ignition key cylinder. Installation
S6RW0DA206002
3) Perform Step a) through e) described below within
For removal and installation, refer to “Outside Air
15 seconds.
Temperature Sensor Removal and Installation (If
a) Insert ignition key (1) in ignition key cylinder (2). Equipped) in Section 9C”.
b) Remove ignition key from ignition key cylinder.
c) Repeat Step a) and b) twice. Outside Air Temperature Sensor Inspection
S6RW0DA206003
d) Insert ignition key in ignition key cylinder. For inspection, refer to “Outside Air Temperature Sensor
e) Push lock side (3) of driver side manual lock Inspection (If Equipped) in Section 9C”.
switch (4) 3 times.

Special Tools and Equipment

Special Tool
S6RW0DA208001
SUZUKI scan tool
—
This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loop back
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. )
 Edited by Foxit PDF Editor
Immobilizer
Copyright (c) by Foxit Software Control
Company, System:
2004 10C-1
For Evaluation Only.
Immobilizer Control System
Control Systems

Precautions
Precautions in Diagnosing Troubles Precautions in Handling Immobilizer Control
S6RW0DA300001
System
• Before confirming the diagnostic trouble code (DTC), S6RW0DA300004
do not disconnect connector from ECM, battery cable • Do not turn ON ignition switch with ignition key in
from battery, ground wire harness, or main fuse. Such contact with another one or quite close to another
disconnection will erase DTC stored in ECM. one. Or, the immobilizer control system may detect
• DTC stored in ECM memory can be checked as well some abnormal condition and prevent the engine from
as cleared by using SUZUKI scan tool. Before using starting.
SUZUKI scan tool, read its operator’s manual
carefully to know how to use it and what functions are
available.
• Be sure to read “Precautions for Electrical Circuit
Service in Section 00” before inspection.
• Communication of ECM, BCM, ABS control module,
TCM (if equipped), 4WD control module (if equipped),
keyless start control module (if equipped),
combination meter and DLC is established by CAN
(Controller Area Network). Therefore, handle CAN
communication lines with care referring to “Precaution I3RH0AA30001-01
for CAN Communication System in Section 00”. • Do not turn ON ignition switch by using ignition key
For CAN communication system, refer to description with any type of metal (1) wrapped its grip or in
on “CAN Communication System Description in contact with it. Or, the immobilizer control system may
Section 1A”. detect some abnormal condition and prevent the
engine from starting.
Precaution in Replacing ECM
S6RW0DA300002
• If ECM is replaced with new or used one without
Immobilizer control function, the engine will not be
started. In case of the above, check if the newly
installed ECM has Immobilizer control function.
• After ECM is replaced with new one or used one, the
transponder code in the transponder built in the 1

ignition key has to be registered with ECM. Or, the

engine cannot be started up. For the registration
procedure, refer to “Procedure after ECM
I3RH0AA30002-01
Replacement”.

Precaution in Replacing Ignition Key

S6RW0DA300003
To register ignition key in case of replacing key(s) and/or
making spare key(s), the transponder code in the ignition
key is registered with ECM. Or the engine can not be
started up. For the registration procedure, refer to
“Registration of the Ignition Key”.
 Edited by Foxit PDF Editor
10C-2 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
• Do not leave ignition key in a place where • Do not turn ignition switch to ON position by bringing
temperature is high. High temperature may cause radio antenna close to coil antenna. Or, the
damage to the transponder built in the ignition key. immobilizer control system may detect some
abnormal condition and prevent the engine from
starting.

I3RH0AA30004-01

I3RH0AA30003-01

General Description
Immobilizer Control System Introduction
S6RW0DA301001
The immobilizer control system is an anti-theft device that immobilizes the vehicle. It stops the engine from working
and prevents the vehicle from being stolen. It mainly consists of the following components. For immobilizer control
system components location, refer to “Immobilizer Control System Components Location”.
• ECM
• ICM with the built-in coil antenna
• Ignition key with the built-in transponder
A code called the transponder code is memorized in the transponder. And, the code is registered with ECM. Basically,
when the ignition switch is turned ON, ECM reads the code by the coil antenna. Then, if the code in transponder in the
ignition key does not match with the one registered with ECM, ECM stops the operation of the fuel injection so as not
to start up the engine and turns the immobilizer indicator light ON and OFF using CAN communication lines. (In
addition to the above operation, ECM also turns the immobilizer indicator light ON and OFF when some trouble is
detected in the keyless start system.)

On-Board Diagnostic System Description (Self-diagnosis Function)

S6RW0DA301002
ECM diagnoses if there is any trouble with the immobilizer control system. The diagnostic information is stored as the
diagnostic trouble code (DTC) in ECM. To read the diagnostic information, use SUZUKI scan tool referring to “DTC
Check”.
With the ignition switch turned ON (but the engine at stop) regardless of the condition of the engine and emission
control system, ECM indicates whether there is any trouble with the immobilizer control system or not by either lighting
ON or flashing ON and OFF the immobilizer indicator light.

Immobilizer indicator light lights ON:

No trouble exists in the immobilizer control system. (After starting up the engine, the light turns OFF.)

Immobilizer indicator light flashes ON and OFF:

There is some trouble in the immobilizer control system or in the keyless start system. Its diagnostic information is
stored in ECM.
 Edited by Foxit PDF Editor
Immobilizer
Copyright (c) by Foxit Software Control
Company, System:
2004 10C-3
For Evaluation Only.
Schematic and Routing Diagram
Immobilizer Control System Wiring Circuit Diagram
S6RW0DA302001
NOTE
For more details about power supply circuit, ground wire circuit, and each circuit for ECM, BCM, ABS
control module, keyless start control module and combination meter, refer to “System Circuit Diagram
in Section 9A”.

[B]
3 4 5 10 14
12V 5V
2
BLK/WHT G17-1 12V 5V
G17-4 YEL/RED E01-13
G17-2 12V 12V
BLK/ORN
G17-3 YEL/BLK E01-28
2
WHT/RED G17-6 G146-3 G146-7 G146-8

6 BLK/YEL
BRN/YEL
7 WHT G17-5
BRN
2 2 15 G16-20 G16-29 G16-30
8 5V
WHT/RED 5V
2 E08-12 WHT E01-18

E08-1 RED E01-3

1
G16-18 G16-19

WHT RED

11
E08-2 RED E04-1 G04-4 RED 16

[A]
E08-13 WHT E04-2 G04-2 WHT

G17
WHT G04-1 IG1
9 WHT RED
6 5 4 3 2 1 17
RED G04-3 G241-10 G241-7
18
12 PPL/WHT L313-3 12V
BLU G04-5
13 BLU E04-9
I6RW0DA30001-02
 Edited by Foxit PDF Editor
10C-4 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.

[C]
3 4 5 10 14
12V 5V
2
BLK/WHT G17-1 12V 5V
G17-4 YEL/RED E01-13
G17-2 12V 12V
BLK/ORN
G17-3 YEL/BLK E01-28
2
WHT/RED G17-6 G146-3 G146-7 G146-8

6
BRN BRN/YEL BLK/YEL
7 WHT G17-5
15 G16-20 G16-29 G16-30
2 2
8 5V
E08-12 WHT E01-18 5V
WHT/RED
2
E08-1 RED E01-3

1 G16-18 G16-19

WHT RED

16
E08-2 RED

E08-13 WHT
11
G05-1 RED

[A] G05-3 WHT

G17 WHT G05-4

9 IG1
WHT RED
6 5 4 3 2 1 RED G05-2 17
G241-10 G241-7
12V
18

BLU G05-35

I6RW0DA30002-01

[A]: ICM connector (harness side view) 5. ICM 12. To SDM

[B]: Junction block with BCM type 6. Illumination ring (if equipped) 13. To ABS control module
[C]: Junction block without BCM type 7. To BCM 14. Steering lock unit (keyless start model)
1. Battery 8. ABS control module 15. Keyless start control module (if equipped)
2. Fuse 9. DLC 16. CAN junction connector
3. Ignition switch 10. ECM 17. Combination meter
4. Junction block 11. BCM 18. Immobilizer indicator light
 Edited by Foxit PDF Editor
Immobilizer
Copyright (c) by Foxit Software Control
Company, System:
2004 10C-5
For Evaluation Only.
Component Location
Immobilizer Control System Components Location
S6RW0DA303001

2
3 2
1

7
3

4 5 6

I6RW0BA30001-01

1. ECM 5. Ignition key (non keyless entry model)

2. Immobilizer indicator light 6. Ignition key (keyless start model)
3. ICM 7. Transponder
4. Ignition key (keyless entry model)

Diagnostic Information and Procedures

Immobilizer Control System Check
S6RW0DA304001

Step Action Yes No

1 Immobilizer indicator light check Go to Step 2. Check if DTC P1636
1) Turn ignition switch to ON position using ignition key. and/or P1638 are
detected by ECM
Does immobilizer indicator light come on? referring to “DTC
Check”. If detected, go
to applicable DTC diag.
flow. If not detected, go
to “Immobilizer Indicator
Light Does Not Come
ON with Ignition Switch
ON and Engine Stop”.
2 Immobilizer indicator light check Check ECM for DTC Go to Step 3.
referring to “DTC
Does immobilizer indicator light flash on and off continuously Check”. Then, go to
in Step 1? applicable DTC diag.
flow.
3 Engine start check Go to Step 4. Go to “Engine and
1) Start engine using ignition key. Emission Control
System Check in
Does engine start? Section 1A”.
4 Immobilizer indicator light check Go to “Immobilizer Immobilizer control
1) Check if immobilizer indicator light remains ON after Indicator Light Remains system is in good
engine start. ON after Engine Start”. condition. Then, go to
“Keyless Start System
Does immobilizer indicator light remains ON after engine Check in Section 10E”
start? for keyless start model.
 Edited by Foxit PDF Editor
10C-6 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
DTC Check DTC Clearance
S6RW0DA304002 S6RW0DA304003
NOTE NOTE
To know how to use SUZUKI scan tool in To know how to use SUZUKI scan tool in
detail, refer to its operator’s manual. detail, refer to its operator’s manual.

1) Turn the ignition switch to OFF position. 1) Turn the ignition switch to OFF position,
2) Connect SUZUKI scan tool to data link connector 2) Connect SUZUKI scan tool to data link connector
(DLC) (1) located under instrument panel at driver’s (DLC) (1) located under instrument panel at driver’s
seat side. seat side.
Special tool Special tool
(A): SUZUKI scan tool (SUZUKI-SDT) (A): SUZUKI scan tool (SUZUKI-SDT)

1 (A) 1 (A)
I5RW0CA30002-01 I5RW0CA30002-01

3) Turn the ignition switch to ON position. 3) Turn the ignition switch to ON position.
4) Read DTC according to instructions displayed on 4) Clear DTC(s) according to the instructions displayed
SUZUKI scan tool and print them or write them on SUZUKI scan tool.
down. Refer to scan tool operator’s manual for 5) After completing the clearance, turn the ignition
details. switch to OFF position, and then disconnect SUZUKI
If communication between scan tool and ECM is not scan tool from DLC.
possible, go to “Troubleshooting for Communication
Error with Scan Tool Using CAN in Section 1A”.
5) After completing the check, turn ignition switch to
OFF position, and then disconnect SUZUKI scan
tool from DLC.
 Edited by Foxit PDF Editor
Immobilizer
Copyright (c) by Foxit Software Control
Company, System:
2004 10C-7
For Evaluation Only.
DTC Table
S6RW0DA304004
ECM

NOTE
ECM detects DTC. ICM does not.

Immobilizer
DTC No. Detecting Item Detecting Condition Indicator
Light
Transponder code in transponder built in
) P1614 Transponder response error Flash
ignition key cannot be read through ICM.
• While registering the transponder code in
the transponder built in the ignition key in
ECM, the keyless start control module sent
) P1615 Steering lock unit communication error a signal to ECM indicating that the ID code Flash
could not be registered.
• The ID code could not be registered in the
keyless start control module or ECM.
ECM detects different ID codes registered in
) P1616 Unregistered keyless start control module Flash
ECM and keyless start control module.
Reception error of communication data for
Keyless start control module CAN
) P1618 keyless start control module is detected for Flash
communication error
longer than specified time continuously.
) P1621 Immobilizer communication line error Communication error between ICM and ECM. Flash
) P1622 EEPROM reading / writing error EEPROM in ECM is corrupted. Flash
Transponder code in the transponder built in
) P1623 Unregistered transponder Flash
the ignition key is invalid.
) P1625 Immobilizer antenna error ICM is faulty. Flash
Immobilizer information registration
) P1636 Communication error between ECM and BCM. No operation
failure
• Communication error between ECM and
) P1638 Immobilizer information mismatched BCM. No operation
• Wrong ECM or BCM is used.

NOTE
If any DTC other than the above DTCs is detected, refer to “DTC Table in Section 1A”.
 Edited by Foxit PDF Editor
10C-8 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Scan Tool Data
S6RW0DA304005
Suzuki scan tool displays the following data using “Registration Information” mode.
Scan Tool Data
Vehicle Condition Normal Data
(Registration Information Data)
) Component ID ****
) Keyfree System Code Registered
) Remote Starter Code Unregistered
Ignition switch at ON position
) Number of the Registered Immobilizer Key 2 Keys
) Latest Year for the Key Registration 2006
) Latest Month for the Key Registration June

Scan Tool Data Definitions

Component ID (****)
This parameter indicates the vehicle ID number of four digits used for the Suzuki scan tool.

Keyfree System Code (Keyless start control system ID code, Registered, Unregistered)
Registered: ID code of the keyless start system is registered in the ECM.
Unregistered: ID code of the keyless start system is unregistered in the ECM.

Remote Starter Code (Remote starter control system code, Registered, Unregistered)
Registered: Remote starter system is registered in the ECM.
Unregistered: Remote starter system is unregistered in the ECM.

Number of the Registered Immobilizer Key (0 – 4 keys)

The number of the transponder code in the transponder built in the ignition key that is registered with ECM.

NOTE
A maximum of four transponder codes can be registered with ECM. Therefore, the maximal value
should be 4.

Latest Year for the Key Registration (2006 or Later)

The year in which the transponder code in the transponder built in the ignition key is registered with ECM.

Latest Month for the Key Registration (January-December)

The month in which the transponder code in the transponder built in the ignition key is registered with ECM.
 Edited by Foxit PDF Editor
Immobilizer
Copyright (c) by Foxit Software Control
Company, System:
2004 10C-9
For Evaluation Only.
Immobilizer Indicator Light Does Not Come ON with Ignition Switch ON and Engine Stop
S6RW0DA304006
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Circuit Description
When the ignition switch is turned ON, ECM transmits the indication ON signal to the combination meter to turn ON the
immobilizer indicator light in case that there is not any problem with the immobilizer control system. Then, the
combination meter turns ON the light. When the engine is started up, ECM transmits the indication OFF signal to the
combination meter to turn OFF the light. Then, the combination meter turns OFF the immobilizer indicator light.
However, in case that there is some trouble with the immobilizer control system, the immobilizer indicator light flashes
ON and OFF when the ignition switch is turned ON.

Troubleshooting
Step Action Yes No
1 Immobilizer indicator light power supply check Go to Step 2. Go to Step 4.
1) Turn the ignition switch to ON position.

Do other warning lights come ON?

2 DTC check of ECM Go to applicable DTC Go to Step 3.
1) Check ECM for DTC referring to “DTC Check in Section diag. flow.
1A”.

Is DTC U0073, U0101, U0121 and/or U0140 detected?

3 DTC check of BCM Go to applicable DTC Substitute a known-
1) Check BCM for DTC referring to “DTC Check in Section diag. flow. good combination meter
10B”. and recheck. If
immobilizer indicator
Is DTC U0073, U0100, U0101, U0155 and/or U1144 light still remains OFF,
detected? substitute a known-
good ECM and recheck.
4 Fuse check Replace blown fuse, Go to Step 5.
1) Turn the ignition switch to OFF position. and then check for
short.
2) Check fuse for combination meter circuit.

Is fuse blown?
5 Combination meter power supply wire circuit check Go to Step 6. Repair open in power
1) Remove combination meter referring to “Combination supply wire circuit.
Meter Removal and Installation in Section 9C”.
2) Check for proper connection at terminals and wires of
combination meter connector.
3) If OK, turn the ignition switch to ON position and
measure voltage between power supply terminal of
combination meter and vehicle body ground. Refer to
“Combination Meter Circuit Diagram in Section 9C”.

Is it 10 – 14 V?
6 Combination meter ground wire circuit check Substitute a known- Repair open or high
1) Turn ignition switch OFF position. good combination meter resistance in ground
and recheck. If still circuit.
2) Measure resistance between ground terminal of
remains OFF, substitute
combination meter connector and vehicle body ground.
a known-good ECM and
Refer to “Combination Meter Circuit Diagram in Section
recheck.
9C”.

Is resistance 1 Ω or less?
 Edited by Foxit PDF Editor
10C-10 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Immobilizer Indicator Light Remains ON after Engine Start
S6RW0DA304007
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Circuit Description
Refer to “Immobilizer Indicator Light Does Not Come ON with Ignition Switch ON and Engine Stop”.

Troubleshooting
Step Action Yes No
1 DTC check of ECM Go to applicable DTC Go to Step 2.
1) Check ECM for DTC referring to “DTC Check in Section diag. flow.
1A”.

Is DTC detected?
2 CAN communication circuit check Substitute a known- Repair circuit.
1) Disconnect connectors from ECM, BCM, ABS control good combination meter
module and combination meter. and recheck. If
immobilizer indicator
2) Check CAN communication circuit for open, short and
light still remains ON,
high resistance.
substitute a known-
• Between ECM and ABS control module good ECM and recheck.
• Between BCM and ABS control module
• Between BCM and combination meter

Is each CAN communication circuit in good condition?

DTC P1614: Transponder Response Error

S6RW0DA304008
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
Transponder code in transponder built in ignition key • Use of ignition key without transponder
cannot be read through ICM. • Use of unregistered ignition key
• Corruption of transponder in ignition key
• ICM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC check of ECM Go to applicable DTC Go to Step 3.
1) Check if any DTC other than P1614 is detected referring diag. flow.
to “DTC Check”.

Is DTC other than P1614 detected?

3 Registration of ignition key in use with ECM Recheck DTC. Go to Step 4.
1) Register ignition key in use with ECM referring to
“Registration of the Ignition Key”.

Was registration of ignition key completed?

4 Registration of the spare ignition key Replace ignition key Substitute a known-
1) Register the spare ignition key with ECM referring to which can not be good ECM and recheck.
“Registration of the Ignition Key”. registered.

Was registration of spare ignition key completed?

 Edited by Foxit PDF Editor
Copyright (c) by FoxitImmobilizer Control2004
Software Company, System: 10C-11
For Evaluation Only.
DTC P1615: Steering Lock Unit Communication Error
S6RW0DA304009
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Circuit Description
When the transponder code in the ignition key is registered in ECM, the ID code is registered in both ECM and keyless
start control module at the same time. This DTC is detected only in case that the ID code cannot be registered in both
ECM and keyless start control module when the transponder code in the ignition key is registered in ECM.

NOTE
• Troubleshoot DTC P1618 first if both DTC P1615 and P1618 are detected at the same time.
• After replacing ECM, be sure to register the transponder code in the ignition key with ECM referring
to “Registration of the Ignition Key”. After replacing the keyless start control module of the vehicle
equipped with the keyless start system, be sure to perform “Registration of the Ignition Key”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
• While registering the transponder code in ECM, the • Wire circuits between steering lock unit and keyless
keyless start control module sent a signal to ECM start control module
indicating that the ID code could not be registered. • CAN communication circuit
• The ID code could not be registered in the keyless start • Steering lock unit
control module or ECM.
• Keyless start control module
• Combination meter
• TCM (if equipped)
• 4WD control module (if equipped)
• ABS control module
• BCM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 Registration of ignition key Recheck ECM for DTC. Go to Step 3.
1) Register ignition key in use with ECM referring to If DTC P1615 is still
“Registration of the Ignition Key”. detected, go to Step 3.

Was registration of ignition key completed?

3 DTC check of ECM Go to applicable DTC Go to Step 4.
1) Check ECM for DTC referring to “DTC Check in Section diag. flow.
1A”.

Is DTC U0073, U0101, U0121 and/or U0140 detected?

4 DTC check of keyless start control module Go to applicable DTC Go to Step 5.
1) Check keyless start control module for DTC referring to diag. flow.
“DTC Check in Section 10E”.

Is DTC detected?
5 Check for communication circuit between steering lock Go to Step 6. Repair malfunction part
unit and keyless start control module and recheck.
1) Check for open, short, and high resistance in steering
lock unit circuit. Refer to Step 2 in “DTC No. 11:
Communication Error with Steering Lock Unit in Section
10E”.

Is each circuit in good condition?

 Edited by Foxit PDF Editor
10C-12 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Step Action Yes No
6 Steering lock unit power supply check Replace steering lock Substitute a known-
1) Connect keyless start control module connector. unit and recheck. good keyless start
control module and
2) With ignition switch at ON position, check power supply
recheck. If DTC P1615
terminal voltage of steering lock unit connector. Refer to
is still detected,
“Keyless Start Control Module Power and Ground Circuit
substitute a known-
Check in Section 10E”.
good ECM and recheck.
Is voltage 4 – 6 V?

DTC P1616: Unregistered Keyless Start Control Module

S6RW0DA304010
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Circuit Description
P1616 is detected when ECM detects different ID codes registered in ECM and keyless start control module after
turning engine start knob to ON position. Normally, when keyless start control module is replaced with new one, ECM
automatically registers the applicable code in keyless start control module after turning ignition switch to ON position.
However, when keyless start control module is replaced with used one, ECM does not automatically register the
applicable code in keyless start control module even if ignition switch is turned to ON position.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
ECM detects different ID codes registered in ECM and • Keyless start system wire circuit
keyless start control module. • Keyless start control module
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 Registration of the ignition key Recheck ECM for DTC. Go to Step 3.
1) Register the ignition key with ECM referring to
“Registration of the Ignition Key”.

Was registration of ignition key completed?

3 DTC check of ECM Go to DTC P1618 Go to DTC P1615
1) Check DTC referring to “DTC Check”. troubleshooting. troubleshooting.

Is DTC P1618 and/or P1615 detected other than P1616?

 Edited by Foxit PDF Editor
Copyright (c) by FoxitImmobilizer Control 2004
Software Company, System: 10C-13
For Evaluation Only.
DTC P1618: Keyless Start Control Module CAN Communication Error
S6RW0DA304011
Refer to “Troubleshooting for CAN-DTC in Section 1A”.

DTC P1621: Immobilizer Communication Line Error

S6RW0DA304012
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
Communication error between ICM and ECM. • Related fuse(s) blown
• Poor connection at ICM connector
• Poor connection at ECM connector
• Power supply circuit
• Ground circuit
• Communication circuits between ICM and ECM
• ICM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 Fuse check Replace blown fuse(s) Go to Step 3.
1) Check fuse for ICM circuit. and then, check for
short circuit.
Is fuse in good condition?
3 Voltage check at power and ground terminal Go to Step 4. Repair circuit.
1) Check power and ground terminal voltage of ICM
connector referring to “Inspection of ICM and Its Circuit”.

Is each terminal voltage in good condition?

4 ICM and ECM connector check Go to Step 5. Repair poor connection.
1) With the ignition switch at OFF position, check
intermittent and poor connection of ICM connector and
ECM connectors referring to “Intermittent and Poor
Connection Inspection in Section 00”.

Is each connector in good condition?

5 Communication circuit check between ICM and ECM Substitute a known- Repair circuit.
1) Check for open, short and high resistance in serial good ICM and recheck.
communication and clock circuit between ICM and ECM. If DTC P1621 is still
detected, substitute a
Is each communication circuit in good condition? known good ECM and
recheck.
 Edited by Foxit PDF Editor
10C-14 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
DTC P1622: EEPROM Reading / Writing Error
S6RW0DA304013
Detecting Condition and Trouble Area
Detecting Condition Trouble Area
EEPROM in ECM is corrupted. Internal failure (EEPROM corruption) of ECM

Troubleshooting
1) Clear DTC(s) referring to “DTC Clearance”.
2) Turn the ignition switch to OFF position.
3) Check if DTC P1622 is still detected referring to “DTC Check”. If still detected, go to the next step. If not, the
troubleshooting is completed.
4) Replace ECM with new one referring to “Engine Control Module (ECM) Removal and Installation in Section 1C”.
5) Perform “Procedure after ECM Replacement”.

DTC P1623: Unregistered Transponder

S6RW0DA304014
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
Transponder code in the transponder built in the ignition • Use of the unregistered ignition key
key is invalid. • ICM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC check of ECM Go to applicable DTC Go to Step 3.
1) Check if any DTC other than P1623 is detected referring diag. flow.
to “DTC Check”.

Is DTC other than P1623 detected?

3 Registration of unregistered ignition key with ECM Recheck DTC. Go to Step 4.
1) Register the unregistered ignition key with ECM referring
to “Registration of the Ignition Key”.

Was registration of ignition key completed?

4 Registration of the spare ignition key Replace ignition key Substitute a known-
1) Register the spare ignition key referring to “Registration which cannot be good ECM and recheck.
of the Ignition Key”. registered.

Was registration of spare ignition key completed?

 Edited by Foxit PDF Editor
Copyright (c) by FoxitImmobilizer Control 2004
Software Company, System: 10C-15
For Evaluation Only.
DTC P1625: Immobilizer Antenna Error
S6RW0DA304015
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
ICM is faulty. • ICM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC confirmation Substitute a known- Intermittent trouble.
1) Clear DTC referring to “DTC Clearance”. good ICM and recheck Check for intermittent
DTC. If DTC P1625 is referring to “Intermittent
2) Turn the ignition switch to OFF position.
still detected, substitute and Poor Connection
3) Check DTC referring to “DTC Check”. a known-good ECM and Inspection in Section
recheck. 00”.
Is DTC P1625 still detected?

DTC P1636: Immobilizer Information Registration Failure

S6RW0DA304016
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
The registration of the immobilizer control system • CAN communication circuit
information in ECM is failed. • Keyless start control module (if equipped)
• Combination meter
• TCM (A/T model)
• 4WD control module (if equipped)
• ABS control module
• BCM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC check of ECM Go to applicable DTC Go to Step 3.
1) Check ECM for DTC referring to “DTC Check in Section diag. flow.
1A”.

Is DTC U0073, U0101, U0121 and/or U0140 detected?

3 DTC check of BCM Go to applicable DTC Go to Step 4.
1) Check BCM for DTC referring to “DTC Check in Section diag. flow.
10B”.

Is DTC U0073, U0100, U0101, U0155 and/or U1144

detected?
 Edited by Foxit PDF Editor
10C-16 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Step Action Yes No
4 CAN communication circuit check Go to Step 5. Repair circuit.
1) Disconnect connectors from ECM, BCM and ABS
control module.
2) Check CAN communication circuit for open, short and
high resistance.
• Between ECM and ABS control module
• Between BCM and ABS control module

Is each CAN communication circuit in good condition?

5 Replacement of BCM Substitute a known- BCM faulty.
1) Replace BCM with new one referring to “BCM (Included good ECM and recheck.
in Junction Block) Removal and Installation in Section
10B”.
2) Check ECM for DTC referring to “DTC Check”.

Is DTC P1636 still detected?

DTC P1638: Immobilizer Information Mismatched

S6RW0DA304017
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.

Detecting Condition and Trouble Area

Detecting Condition Trouble Area
• The immobilizer control system information in ECM and • Use of the wrong ECM
the one in BCM does not match. • CAN communication circuit
• The registration of the immobilizer control system • Keyless start control module (if equipped)
information in ECM is failed.
• Combination meter
• TCM (A/T model)
• 4WD control module (if equipped)
• ABS control module
• BCM
• ECM

Troubleshooting
Step Action Yes No
1 Was “Immobilizer Control System Check” performed? Go to Step 2. Go to “Immobilizer
Control System Check”.
2 DTC confirmation Go to Step 3. Intermittent trouble.
1) Disconnect negative (–) cable from battery for more than Check for intermittent
5 seconds. referring to “Intermittent
and Poor Connection
2) Connect negative (–) cable to battery.
Inspection in Section
3) Check if any DTC is detected referring to “DTC Check”. 00”.
Is DTC P1638 still detected?
3 ECM specification check Go to Step 4. Replace ECM with the
1) Check ECM part number to see if ECM is applicable to correct one and recheck
the vehicle in service. if DTC P1638 is still
detected by ECM.
Is a correct ECM used for the vehicle in service?
4 DTC check of ECM Go to applicable DTC Go to Step 5.
1) Check ECM for DTC referring to “DTC Check in Section diag. flow.
1A”.

Is DTC U0073, U0101, U0121 and/or U0140 detected?

 Edited by Foxit PDF Editor
Copyright (c) by FoxitImmobilizer Control 2004
Software Company, System: 10C-17
For Evaluation Only.
Step Action Yes No
5 DTC check of BCM Go to applicable DTC Go to Step 6.
1) Check BCM for DTC referring to “DTC Check in Section diag. flow.
10B”.

Is DTC U0073, U0100, U0101, U0155 and/or U1144

detected?
6 CAN communication circuit check Go to Step 7. Repair circuit.
1) Disconnect connectors from ECM, BCM and ABS
control module.
2) Check CAN communication circuit for open, short and
high resistance.
• Between ECM and ABS control module
• Between BCM and ABS control module

Is each CAN communication circuit in good condition?

7 Replacement of BCM Substitute a known- BCM faulty.
1) Replace BCM with new one referring to “BCM (Included good ECM and recheck.
in Junction Block) Removal and Installation in Section
10B”.
2) Check ECM for DTC referring to “DTC Check”.

Is DTC P1638 still detected?

Inspection of ICM and Its Circuit

S6RW0DA304018
ICM and its circuit can be checked at ICM wiring connector by measuring voltage.

! CAUTION
ICM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ICM with
connector disconnected from it.

Voltage Check
1) Remove ICM (1) from steering lock assembly or steering lock unit referring to “ICM Removal and Installation”.
2) Connect ICM connector (2) to ICM.
3) Check voltage at each terminal.

NOTE
As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when the
ignition switch is turned to ON position.

1
[A]

6 5 4 3 2 1
2

I6RW0BA30003-01

[A]: ICM connector (harness side view)

 Edited by Foxit PDF Editor
10C-18 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Terminal Circuit Normal Voltage Condition
About 12.0 V Ignition switch at ON position
G17-1 Power supply
0.0 V Ignition switch at OFF position
G17-2 Ground 0.0 V —
See the reference
—
G17-3 Serial communication line waveform.
0.0 V Ignition switch at OFF position
See the reference
—
G17-4 Clock line waveform.
0.0 V Ignition switch at OFF position
• Ignition key not inserted to the key cylinder
0V
• Door opened
• Ignition key at OFF position
• From the time door is closed to the time
0 V → 12 V interior light faded out completely
G17-5 Illumination ring control (if equipped) (As the interior light fades out, the voltage
increases.)
• Door closed
• From the ignition switch is turned ON to the
0 V → 12 V time interior light is completely faded out
(As the interior light fades out, the voltage
increases.)
Illumination ring power supply
G17-6 About 12.0 V —
(if equipped)

Reference Waveform

I6RW0CA30003-01

[A]: The transponder code read successfully at the first try. 2. Clock line
[B]: The transponder code read successfully at the second try. 3. First try
1. Serial communication line 4. Second try

NOTE
When ECM cannot read the transponder code at the first try, ECM tries to read the transponder code
repeatedly up to 8 times. The second waveform is the example showing that ECM read the transponder
code successfully at the second try.

Measurement terminals CH1: G17-3 to G17-2

CH2: G17-4 to G17-2
Oscilloscope settings CH1: 5 V/DIV
CH2: 5 V/DIV
TIME: 20 ms
Measurement condition Right after the ignition switch is turned ON, the waveform can be read.
 Edited by Foxit PDF Editor
Copyright (c) by FoxitImmobilizer Control 2004
Software Company, System: 10C-19
For Evaluation Only.
Repair Instructions
ICM Removal and Installation Registration of the Ignition Key
S6RW0DA306001 S6RW0DA306002
To finish the registration of the ignition key, the
Removal transponder code memorized in the transponder built in
1) Disconnect negative (–) cable at battery. the ignition key has to be registered with ECM. To
register the transponder code with ECM, perform
2) Remove dash side trim (4) and steering column hole
“Immobilizer Key Registration” mode of SUZUKI scan
cover (3).
tool referring to “SUZUKI scan tool Operator’s Manual”.
3) Remove steering column covers (1).
Turn steering wheel to access steering column cover NOTE
screws (2).
• A maximum of four transponder codes can
1 2
be registered with ECM.
• At an early part of the registration process,
all transponder codes of the ignition keys
in use already registered with ECM are
cleared. Therefore, before starting the
registration, prepare all ignition keys in
use in addition to the new ignition key(s) to
be registered with ECM.

Procedure after ECM Replacement

S6RW0DA306003
4 3 After ECM is replaced with new one or used one, the
I6RW0BA30004-01
transponder code in the transponder built in the ignition
4) Remove engine start knob (keyless start model). key has to be registered with ECM. To register
5) Disconnect connector (1) from ICM (2). transponder code in the ignition key with ECM, perform
6) Remove a screw (3) from ICM. “Immobilizer Key Registration” mode of SUZUKI scan
tool referring to “SUZUKI scan tool Operator’s Manual”.
2
NOTE
A maximum of four transponder codes can
be registered with ECM.

3
1

I4RS0BA30007-03

7) Remove ICM from steering lock assembly or

steering lock unit.

NOTE
The antenna part of ICM is fragile. Therefore,
do not add strong power to the part or twist
the part.

Installation
Reverse the removal procedure.
 Edited by Foxit PDF Editor
10C-20 Immobilizer Control System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Special Tools and Equipment
Special Tool
S6RW0DA308001
SUZUKI scan tool (SUZUKI- 6
SDT)
— 1 2
This kit includes following
4
items. 1. SUZUKI-SDT 2. 3
DLC3 cable 3. USB cable 4. 5
AC/DC power supply 5.
Voltage meter probe 6.
Storage case ) / )
 Edited by Foxit PDF Editor
Keyless
Copyright (c) by Foxit Software Start
Company, System:
2004 10E-1
For Evaluation Only.
Keyless Start System
Control Systems

General Description
Keyless Start System Description
S6RW0DA501001
Keyless start system consisting of the parts shown below has three functions as described below.
• Keyless engine start function:
With the remote controller which has been registered in the keyless start control module carried with oneself, the
engine can be started without using the ignition key.
• Door lock function:
Pushing the request switch incorporated in the outside handle of the driver side door, passenger side door or rear
end door while carrying the remote controller which has been registered in the keyless start control module, doors
can be locked or unlocked.
• Keyless entry system function:
It is possible to lock or unlock doors by pushing the lock or unlock button of remote controller.
The keyless start control module can accept registration of up to four remote controllers.

[B] [A] 9
12
13

12

14
3

1
6

2
8

3
11

7 10
4

I6RW0DA50001-01

[A]: Junction block with BCM type 5. Luggage room antenna 11. Unlock button
[B]: Junction block without BCM type 6. Driver side door antenna 12. BCM
1. Keyless start control module 7. Passenger side door antenna 13. Key indicator light
2. Remote controller 8. Rear end door antenna 14. ECM
3. Request switch 9. Steering lock unit
4. Center antenna 10. Lock button
 Edited by Foxit PDF Editor
10E-2 Keyless Start System: Copyright (c) by Foxit Software Company, 2004
For Evaluation Only.
Parts and Functions
S6RW0DA501002
Parts Function
Keyless start control module • Activates each antenna
• Verifies ID code of remote controller
• Requests steering lock unit to release steering lock
• Requests BCM to lock or unlock doors
• Controls key indicator light in combination meter
• Transmits its ID code to ECM
Remote controller • Receives request signal from each antenna
• Transmits ID code and request signal to keyless start control module
• Request keyless start control module to lock or unlock doors (keyless entry
system function)
Request switch • Requests keyless start control module to activate each antenna
Center antenna • Transmits request signal to remote controller
Luggage room antenna • Transmits request signal to remote controller
Driver side door antenna • Transmits request signal to remote controller
Passenger side door antenna • Transmits request signal to remote controller
Rear end door antenna • Transmits request signal to remote controller
Steering lock unit • Releases steering lock
Unlock button • Transmits door unlock request signal (keyless entry system function)
Lock button • Transmits door lock request signal (keyless entry system function)
BCM • Controls each door lock actuator
• Controls warning buzzer
• Lights hazard warning light and interior (DOME) light (answer back)
Key indicator light • Indicates operation state of keyless start system (indicates check result of
remote controller ID code)
ECM • Checks keyless start control module ID code
• Transmits its ID code to keyless start control module
• Starts engine