Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 107

 

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Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 107

 

 

10C-13 Immobilizer Control System: 

11 Check for short to ground wire circuit in communication 

wire circuit
1) With immobilizer control module (ICM) connector “G24” 

and ECM connector “E23” disconnected, check 
resistance between “G24-4” wire terminal at immobilizer 
control module (ICM) connector and body ground.

Is resistance infinite?

Go to Step 12.

Repair short to ground 
wire circuit in 
communication wire 
circuit.

12 Check for short to power circuit in communication wire 

circuit
1) With immobilizer control module (ICM) connector “G24” 

and ECM connector “E23” disconnected, turn the ignition 
switch to ON position.

2) Check voltage between “G24-4” wire terminal at 

immobilizer control module (ICM) connector and body 
ground.

Is voltage 0 V?

Go to Step 13.

Repair short to power 
supply wire circuit in 
communication wire 
circuit.

13 Check for short of communication wire circuit

1) With immobilizer control module (ICM) connector “G24” 

and ECM connector “E23” disconnected, check 
resistance between “G24-3” wire terminal and “G24-4” 
wire terminal at immobilizer control module (ICM) 
connector.

Is resistance infinite?

Go to Step 14.

Repair short of 
communication wire 
circuits.

14 Immobilizer control module (ICM) check

1) Check immobilizer control module (ICM) referring to 

“Inspection of Immobilizer Control Module (ICM) and Its 
Circuit in related manual”.

Is immobilizer control module (ICM) normal?

Replace ECM with new 
one referring to “Engine 
Control Module (ECM) 
Removal and 
Installation in Section 
1C in related manual”, 
and then perform 
“Procedure after ECM 
Replacement in related 
manual”.

Replace immobilizer 
control module (ICM) 
with new one referring 
to “Immobilizer Control 
Module (ICM) Removal 
and Installation in 
related manual”.

Step

Action

Yes

No

Immobilizer Control System:  10C-14

DTC P1622: EEPROM Error

S5JB0EA304013

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

Detecting Condition and Trouble Area

Troubleshooting

1) Clear DTC(s) referring to “Diagnostic Trouble Code (DTC) Clearance in related manual”.
2) Turn the ignition switch to OFF position.
3) Check if DTC P1622 is still detected referring to “Diagnostic Trouble Code (DTC) Check in related manual”. 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 in 

related manual”.

5) Perform “Procedure after ECM Replacement in related manual”.

DTC P1623: Unregistered Transponder

S5JB0EA304014

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

Detecting Condition and Trouble Area

Troubleshooting

Detecting Condition

Trouble Area

EEPROM in ECM is corrupted.

Internal failure (EEPROM corruption) of ECM

Detecting Condition

Trouble Area

Transponder code in the transponder built in the ignition 
key is invalid.

• Use of the unregistered ignition key
• Immobilizer control module (ICM) faulty
• ECM faulty

Step

Action

Yes

No

1

Diagnostic Trouble Code (DTC) confirmation
1) Clear DTC(s) referring to “Diagnostic Trouble Code 

(DTC) Clearance in related manual”.

2) Turn the ignition switch to OFF position.
3) Check if any DTC is detected referring to “Diagnostic 

Trouble Code (DTC) Check in related manual”.

Is DTC P1623 still detected?

Go to Step 2.

The troubleshooting is 
completed.

2

Diagnostic Trouble Code (DTC) check

Is any DTC other than P1623 is detected in Step 1?

Perform the 
troubleshooting 
referring to the 
corresponding 
flowchart, and then go 
to Step 3.

Go to Step 3.

3

Registration of the unregistered ignition key with ECM 
and Diagnostic Trouble Code (DTC) check
1) Register the transponder code in the transponder in the 

unregistered ignition key with ECM referring to 
“Registration of the Ignition Key in related manual”.

2) Check if that DTC P1623 is detected referring to 

“Diagnostic Trouble Code (DTC) Check in related 
manual”.

Is DTC P1623 detected?

Go to Step 4.

The troubleshooting is 
completed.

10C-15 Immobilizer Control System: 

DTC P1625: Immobilizer Antenna Error

S5JB0EA304015

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

Detecting Condition and Trouble Area

Troubleshooting

4

Immobilizer control module (ICM) check
1) Check immobilizer control module (ICM) referring to 

“Inspection of Immobilizer Control Module (ICM) and Its 
Circuit in related manual”.

Is immobilizer controller assembly normal?

Replace ECM with new 
one referring to “Engine 
Control Module (ECM) 
Removal and 
Installation in Section 
1C in related manual”, 
and then perform 
“Procedure after ECM 
Replacement in related 
manual”.

Replace immobilizer 
control module (ICM) 
with new one referring 
to “Immobilizer Control 
Module (ICM) Removal 
and Installation in 
related manual”.

Step

Action

Yes

No

Detecting Condition

Trouble Area

Immobilizer control module (ICM) is faulty.

• Immobilizer control module faulty
• ECM faulty

Step

Action

Yes

No

1

Diagnostic Trouble Code (DTC) confirmation
1) Clear DTC(s) referring to “Diagnostic Trouble Code 

(DTC) Clearance in related manual”.

2) Turn the ignition switch to OFF position.
3) Check if any DTC is detected referring to “Diagnostic 

Trouble Code (DTC) Check in related manual”.

Is DTC P1625 still detected?

Go to Step 2.

The troubleshooting is 
completed.

2

Immobilizer control module (ICM) replacement and 
Diagnostic Trouble Code (DTC) check
1) Replace immobilizer control module (ICM) referring to 

“Immobilizer Control Module (ICM) Removal and 
Installation in related manual”.

2) Check if DTC P1625 is still detected referring to 

“Diagnostic Trouble Code (DTC) Check in related 
manual”.

Is DTC P1625 still detected?

Replace ECM with new 
one referring to “Engine 
Control Module (ECM) 
Removal and 
Installation in Section 
1C in related manual”, 
and then perform 
“Procedure after ECM 
Replacement in related 
manual”.

The troubleshooting is 
completed.

Immobilizer Control System:  10C-16

DTC P1636: Immobilizer Information Registration Failure

S5JB0EA304016

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

DTC Detecting Condition and Trouble Area

Troubleshooting

Detecting Condition

Trouble Area

The registration of the immobilizer control system 
information in ECM is failed.

• CAN communication wire circuits faulty
• Steering angle sensor (if equipped) faulty
• Keyless start control module (if equipped) faulty
• 4WD control module (if equipped) faulty
• TCM (if equipped) faulty
• BCM faulty
• ABS/ESP

® control module faulty

• Combination meter faulty
• ECM faulty

Step

Action

Yes

No

1

Diagnostic Trouble Code (DTC) confirmation
1) Clear DTC(s) referring to “Diagnostic Trouble Code 

(DTC) Clearance in related manual”.

2) Turn the ignition switch to OFF position.
3) Check if any DTC is detected referring to “Diagnostic 

Trouble Code (DTC) Check in related manual”.

Is DTC P1636 still detected?

Go to Step 2.

The troubleshooting is 
completed.

2

Diagnostic Trouble Code (DTC) check in ECM

Is any DTC other than P1636 detected in Step 1?

Perform the 
troubleshooting 
referring to the 
corresponding 
flowchart.

Go to Step 3.

3

Diagnostic Trouble Code (DTC) check in BCM
1) Check BCM for DTC referring to “DTC Check in Section 

10B in related manual”.

Is any DTC detected?

Perform the 
troubleshooting 
referring to the 
corresponding flowchart 
in Section 10B.

Go to Step 4.

4

Replacement of BCM
1) Replace BCM with new one referring to “BCM Removal 

and Installation in Section 10B in related manual”.

2) Check ECM for DTC referring to “Diagnostic Trouble 

Code (DTC) Check in related manual”.

Is DTC P1636 still detected?

Go to Step 5.

The troubleshooting is 
completed.

5

Replacement of ECM
1) Replace ECM with new one referring to “Engine Control 

Module (ECM) Removal and Installation in Section 1C in 
related manual”.

2) Check ECM for DTC referring to “Diagnostic Trouble 

Code (DTC) Check in related manual”.

Is DTC P1636 still detected?

Recheck CAN 
communication wire 
circuits and poor 
connection at ECM, 
ABS/ESP

® control 

module and BCM 
connectors.

The troubleshooting is 
completed.

 

 

 

 

 

 

 

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