Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 535
10C-1 Immobilizer Control System: For Petrol Engine Model
Control Systems
Immobilizer Control System
For Petrol Engine Model
Precautions
Precautions in Diagnosing Troubles
S6JB0AA310001
• 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: For Petrol Engine Model 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: For Petrol Engine Model”.
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.
• 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.
I3RH0AA30001-01
1
I3RH0AA30002-01
I3RH0AA30003-01
Immobilizer Control System: For Petrol Engine Model 10C-2
• 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 lamp ON and OFF using CAN communication lines. (In
addition to the above operation, ECM also turns the immobilizer indicator lamp 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: For Petrol Engine Model”.
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 lamp.
Immobilizer indicator lamp lights ON:
No trouble exists in the immobilizer control system. (After starting up the engine, the lamp turns OFF.)
Immobilizer indicator lamp 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.
I3RH0AA30004-01
I5JB0AA30002-01
10C-3 Immobilizer Control System: For Petrol Engine Model
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
I5JB0DA30001-02
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)
Immobilizer Control System: For Petrol Engine Model 10C-4
Component Location
Immobilizer Control System Components Location
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1
2
3
4
5
6
7
I5JB0AA30001-01
1. ECM
5. Ignition key without keyless entry system
2. Immobilizer indicator lamp
6. Ignition key with keyless start system
3. Immobilizer control module (ICM)
7. Transponder
4. Ignition key with keyless entry system
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