Suzuki Grand Vitara JB627. Manual - part 422

10B-37 Body Electrical Control System: 

DRL Function Setting Procedure

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DRL is controlled by BCM which has a function to set 
operable / non-operable mode of DRL. With a new BCM, 
its DRL is set to the non-operable mode.
Therefore, when BCM has been replaced in the country 
where DRL operation is required by the statutory 
regulation, set DRL to the operable mode according to 
the procedure described below.
Also, performing the same procedure when DRL is in the 
operable mode will change DRL setting to the non-
operable mode.

1) Turn ignition switch to ON position.
2) Perform Steps a) through f) described blow within 15 

seconds after Step 1).
a) Turn lighting switch to CLEARANCE position.

b) Turn lighting switch to OFF position.
c) Repeat Steps a) and b) five times.
d) Turn lighting switch to HEAD position.
e) Turn lighting switch to OFF position.
f) Repeat Steps a) and e) five times.

3) After Step f), buzzer sounds twice which indicates 

that DRL has been set to operable mode.

NOTE
When DRL setting has been changed from 
operable mode to non-operable mode, buzzer 
sounds once.

 

4) After confirming buzzer, turn ignition switch to OFF 

position.

Special Tools and Equipment

Special Tool

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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. )

Immobilizer Control System:  10C-1

Control Systems

Immobilizer Control System

Precautions

Precautions in Diagnosing Troubles

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• Before confirming the diagnostic trouble code (DTC), 

do not disconnect connector from ECM, battery cable 
from battery, ground wire harness, or main fuse. Such 
disconnection will erase DTC stored in ECM.

• DTC stored in ECM memory can be checked as well 

as cleared by using SUZUKI scan tool. Before using 
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, combination meter, 

TCM, keyless start control module (if equipped), ABS/
ESP

® control module, 4WD control module (if 

equipped), Steering angle sensor (if equipped) and 
DLC is established by CAN (Computer Area Network). 
(For more detail of CAN communication, refer to “CAN 
Communication System Description in Section 1A”) 
Therefore, handle CAN communication lines with care 
referring to “Precaution for CAN Communication 
System in Section 00”.

Precaution in Replacing ECM

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• If ECM is replaced with new or used one without the 

functionality for the immobilizer control system, the 
engine will not be started. In case of the above, check 
if the newly installed ECM has the functionality for the 
immobilizer control system referring to its part 
number.

• After ECM is replaced with new one or used one, the 

transponder code in the transponder built in the 
ignition key has to be registered with ECM. Or, the 
engine cannot be started up. For the registration 
procedure, refer to “Procedure after ECM 
Replacement”.

Precautions in Handling Immobilizer Control 
System

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• Do not turn ON ignition switch with ignition key in 

contact with another one or quite close to another 
one. Or, the immobilizer control system may detect 
some abnormal condition and prevent the engine from 
starting.

• Do not turn ON ignition switch by using ignition key 

with any type of metal (1) wrapped its grip or in 
contact with it. Or, the immobilizer control system may 
detect some abnormal condition and prevent the 
engine from starting.

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1

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10C-2 Immobilizer Control System: 

• Do not leave ignition key in a place where 

temperature is high. High temperature may cause 
damage to the transponder built in the ignition key.

• Do not turn ignition switch to ON position by bringing 

radio antenna close to coil antenna. Or, the 
immobilizer control system may detect some 
abnormal condition and prevent the engine from 
starting.

General Description

Immobilizer Control System Introduction

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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.
• Engine Control Module (ECM)
• Immobilizer control module (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)

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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 “Diagnostic Trouble Code (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.

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Immobilizer Control System:  10C-3

Schematic and Routing Diagram

Immobilizer Control System Wiring Circuit Diagram

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NOTE
For more details about power supply and ground wire circuits for ECM, BCM, ABS/ESP

® control 

module, keyless start control module and combination meter, refer to “System Circuit Diagram in 
Section 9A”.

 

BLK/WHT

BLK

WHT/BLU

WHT/RED

12V

G24-1

G24-2

12V

5V

12V

12V

PNK/BLU

GRY/BLU

G24-4

G24-3

E23-11

E23-19

BLK

BLK/YEL

12V

E23-29   

WHT

PPL/WHT

E53-46 E53-42

E23-9 E23-17

WHT

RED

E53-13 E53-44

RED

WHT

RED

WHT

RED

WHT

G31-1

G31-3

G28-8

G28-10

G42-19

G42-18

G42-20 G42-29 G42-30

5V

ORN

BRN/YEL

BLK/YEL

G22-3 G22-7 G22-8

G28-13

PPL/RED

1

2

2

2

2

2

3

4

2

5

6

7

15

9

10

11

12

13

14

BLK

BLK/RED

G24-5

G24-6

14

E03-8

E03-10

E03-12 E03-6

8

19

1

2

3

4

G24

16

5

6

G31-2

G31-4

RED

WHT

WHT

RED

17

18

18

20

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1. Battery

6. Data link connector (DLC)

11. Keyless start control module

16. Immobilizer control module (ICM) connector 

(harness side view)

2. Fuse

7. ECM

12. Combination meter

17. To DLC

3. Ignition switch

8. ABS control module

13. From fuse

18. To BCM

4. Junction block assembly

9. Junction connector

14. BCM

19. To BCM and ABS/ESP

® control module

5. Immobilizer control 

module (ICM)

10. Steering lock unit

15. ESP

® control module (Vehicle equipped 

with ESP

® system)

20. To TCM, 4WD control module and steering 

angle sensor (if equipped)