Suzuki Grand Vitara JB627. Manual — part 423
10C-4 Immobilizer Control System:
Component Location
Immobilizer Control System Components Location
S6JB0BA303001
1
2
3
4
5
6
7
I5JB0AA30001-01
1. ECM
5. Ignition key without keyless entry system
2. Immobilizer indicator light
6. Ignition key with keyless start system
3. Immobilizer control module (ICM)
7. Transponder
4. Ignition key with keyless entry system
Immobilizer Control System: 10C-5
Diagnostic Information and Procedures
Immobilizer Control System Check
S6JB0BA304001
Step
Action
Yes
No
1
Immobilizer indicator light ON check
1) Turn ignition switch to ON position using ignition key.
Does immobilizer indicator light (1) come on?
Go to Step 2.
Check if DTC P1636
and/or P1638 are
detected by ECM
referring to “Diagnostic
Trouble Code (DTC)
Check”. If detected,
perform the
troubleshooting
referring to the
corresponding flowchart
in this section. If not
detected, go to
“Immobilizer Indicator
Light Does Not Come
ON with Ignition Switch
ON and Engine Stop”.
2
Immobilizer indicator light flash check
Does immobilizer indicator light flash on and off continuously
in Step 1?
Check what DTC is
detected by ECM
referring to “Diagnostic
Trouble Code (DTC)
Check”. Then, perform
the troubleshooting
referring to the
corresponding flowchart
in this section.
Go to Step 3.
3
Engine start check
1) Start engine using ignition key.
Does engine start?
Go to Step 4.
Perform “Engine and
Emission Control
System Check in
Section 1A”.
4
Immobilizer indicator light remain ON check
1) Check if immobilizer indicator light remains ON after
engine start.
Does immobilizer indicator light remain ON after engine
start?
Go to “Immobilizer
Indicator Light Remains
ON after Engine Start”.
Immobilizer control
system is in good
condition. Then, go to
“Keyless Start System
Check in Section 10E”
for the vehicle with
keyless start system.
1
I5JB0AA30004-01
10C-6 Immobilizer Control System:
Diagnostic Trouble Code (DTC) Check
S6JB0BA304002
NOTE
To know how to use SUZUKI scan tool in
detail, refer to its operator’s manual.
1) Turn the ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector
(DLC) (1) located under instrument panel at driver’s
seat side.
Special tool
(A): SUZUKI scan tool
3) Turn the ignition switch to ON position.
4) Check if any DTC is stored in ECM according to the
instructions displayed on SUZUKI scan tool.
5) After completing the check, turn ignition switch to
OFF position, and then disconnect SUZUKI scan
tool from DLC.
Diagnostic Trouble Code (DTC) Clearance
S6JB0BA304003
NOTE
To know how to use SUZUKI scan tool in
detail, refer to its operator’s manual.
1) Turn the ignition switch to OFF position,
2) Connect SUZUKI scan tool to data link connector
(DLC) (1) located under instrument panel at driver’s
seat side.
Special tool
(A): SUZUKI scan tool
1) Turn the ignition switch to ON position.
2) Clear DTC(s) according to the instructions displayed
on SUZUKI scan tool.
3) After completing the clearance, turn the ignition
switch to OFF position, and then disconnect SUZUKI
scan tool from DLC.
(A)
1
I4RS0BA30003-03
(A)
1
I4RS0BA30003-03
Immobilizer Control System: 10C-7
Diagnostic Trouble Code (DTC) Table
S6JB0BA304004
ECM
NOTE
ECM detects diagnostic trouble code (DTC). Immobilizer control module (ICM) does not.
NOTE
If any DTC other than the above DTCs is detected, refer to “DTC Table in Section 1A”.
Scan Tool Data
S6JB0BA304005
The data listed below is the standard data obtained from the normal vehicle by using SUZUKI scan tool. Those are
output from ECM. Use them as reference.
Scan Tool Data Definitions
NUMBER OF LEARNT KEY
0 – 4 PCS: 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.
DTC No.
Detecting Item
Detecting Condition
Immobilizer
Indicator
Light
P1614 Transponder response error
Transponder code in the transponder built in
the ignition key cannot be read through
immobilizer control module (ICM).
Flash
P1615
Steering lock unit communication error (for
vehicle with keyless start system)
• While registering the transponder code in
the transponder built in the ignition key in
ECM, the keyless start control module sent
a signal to ECM indicating that the ID code
could not be registered.
• The ID code could not be registered in the
keyless start control module or ECM.
Flash
P1616
Unregistered keyless start control module (for
vehicle with keyless start system)
ECM detects different ID codes registered in
ECM and keyless start system.
Flash
P1618
Keyless start control module CAN
communication error (for vehicle with keyless
start system)
Reception error of communication data for
keyless start control module is detected for
longer than specified time continuously.
Flash
P1621 Immobilizer communication line error
Communication error between immobilizer
control module (ICM) and ECM is detected by
ECM.
Flash
P1622 EEPROM read/write error
EEPROM in ECM is corrupted.
Flash
P1623 Unregistered transponder
Transponder code in the transponder built in
the ignition key is invalid.
Flash
P1625 Immobilizer antenna error
Immobilizer control module (ICM) is faulty.
Flash
P1636 Immobilizer information registration failure
Communication error between ECM and
BCM is detected by ECM.
No operation
P1638 Immobilizer information mismatched
• Communication error between ECM and
BCM is detected by ECM.
• Wrong ECM or BCM is used.
No operation
Scan Tool Data
Vehicle Condition
Normal Data
NUMBER OF LEARNT KEY
Ignition switch at ON position
0 – 4
INPUT YEAR
Ignition switch at ON position
2004 or later
INPUT MONTH
Ignition switch at ON position
1 – 12
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