Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 544

10C-37 Immobilizer Control System: For Diesel Engine Model

Injection Warning Light Does Not Come ON with Ignition Switch ON and Engine Stop

S6JB0AA324006

Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Diesel Engine Model”.

Circuit Description
When the ignition switch is turned ON, ECM transmits the indication ON signal to the combination meter to turn ON the
injection warning 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 injection warning light. However, in case that
there is some trouble with the immobilizer control system, the injection warning light flashes ON and OFF when the
ignition switch is turned ON.

Troubleshooting

Step

Action

Yes

Injection warning light power supply check
1) Turn the ignition switch to ON position.

Do other warning lights come ON?

Go to Step 2.

Go to Step 3.

Diagnostic Trouble Code (DTC) check
1) Check ECM for DTC referring to “DTC Check: For Diesel

Engine Model in Section 1A”.

2) Check ABS control module or ESP

control module for

DTC. For ESP

model, refer to “DTC Check in Section

4F”. For non-ESP

model, refer to “DTC Check in

Section 4E”.

3) Check BCM for DTC referring to “DTC Check in Section

10B”.

Is any DTC(s) detected?

Go to applicable DTC
diag. flow.

Replace combination
meter with a known-
good one and recheck.
If the injection warning
light still remains OFF,
replace ECM with a
known-good one and
recheck.

Fuse check
1) Turn the ignition switch to OFF position.
2) Check if any related fuse is blown.

Is any fuse blown?

Replace blown fuse,
and then check for
short.

Go to Step 4.

Combination meter power supply wire circuit check
1) Remove combination meter referring to “Combination

Meter Removal and Installation in Section 9C”.

2) Check for proper connection at wire terminals 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 referring to
“Combination Meter Circuit Diagram in Section 9C”.

Is it 10 – 14 V?

Go to Step 5.

Repair open in power
supply wire circuit.

Combination meter ground wire circuit check
1) Turn ignition switch OFF position.
2) Measure resistance between ground terminal of

combination meter connector and vehicle body ground
referring to “Combination Meter Circuit Diagram in
Section 9C”.

Is resistance 1

Ω

or less?

Replace combination
meter with a know-good
one and recheck. If the
injection warning light
still remains OFF,
replace ECM with a
known-good one and
recheck.

Repair open or high
resistance in ground
wire circuit.

Immobilizer Control System: For Diesel Engine Model 10C-38

Injection Warning Light Remains ON after Engine Start

S6JB0AA324007

Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Diesel Engine Model”.

Circuit Description
When ECM has any DTC(s), injection warning light remains ON after engine starts.

Troubleshooting
Check ECM for DTC(s) referring to “DTC Check: For Diesel Engine Model in Section 1A” and then, go to applicable
DTC diag. flow.

DTC B1701: Transponder Code Error 1/DTC B1710: Transponder Code Error 3

S6JB0AA324008

Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Diesel Engine Model”.

Detecting Condition and Trouble Area

Troubleshooting

Detecting Condition

Trouble Area

Inconsistent transponder data from transponder while
registering ignition key.

• Transponder in ignition key faulty
• ICM faulty

Step

Action

Yes

Was “Immobilizer Control System Check” performed?

Go to Step 2.

Go to “Immobilizer
Control System Check:
For Diesel Engine
Model”.

Diagnostic Trouble Code (DTC) Check
1) Check ICM for DTC referring to “Diagnostic Trouble

Code (DTC) Check: For Diesel Engine Model”.

Is any DTC other than B1701 and B1710 detected?

Go to corresponding
flowchart for DTC other
than B1701 and B1710.

Go to Step 3.

Registration of the spare ignition key
1) Register the spare ignition key referring to “Registration

of the Ignition Key: For Diesel Engine Model”.

Is ignition key registered?

Replace ignition key
which cannot be
registered.

Substitute a known-
good ICM and recheck.

10C-39 Immobilizer Control System: For Diesel Engine Model

DTC B1702: ECM Communication Error 1

S6JB0AA324019

Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Diesel Engine Model”.

Detecting Condition and Trouble Area

NOTE

• When ICM detects DTC B1702 although engine has started, battery may be defective. In such case,

check battery, referring to “Battery Inspection: For Diesel Engine Model in Section 1J”. Also,
recharge or replace battery if necessary. After that, recheck DTC.

• When DTC B1702 and B1709 are detected at the same time, CAN communication circuit may be

faulty. Check if DTC related to CAN failure is detected by ECM, BCM, keyless start control module
(keyless start model), 4WD control module and/or ABS/ESP

control module. If it is detected,

perform applicable DTC diag. flow.

Troubleshooting

Detecting Condition

Trouble Area

Communication error between ICM and ECM or battery
voltage is lower than specified value

• Battery voltage is low
• Related fuse(s) blown
• ICM power and ground circuit
• ECM power and ground circuit
• CAN communication circuit
• Steering angle sensor (ESP

model)

• 4WD control module
• Keyless start control module (if equipped)
• ABS/ESP

control module

• Combination meter
• BCM
• ICM
• ECM

Step

Action

Yes

Was “Immobilizer Control System Check” performed?

Go to Step 2.

Go to “Immobilizer
Control System Check:
For Diesel Engine
Model”.

Diagnostic Trouble Code (DTC) Check
1) Check ECM for DTC referring to “DTC Check: For Diesel

Engine Model in Section 1A”.