Suzuki Grand Vitara JB627. Manual — part 424

10C-8 Immobilizer Control System:

INPUT YEAR
20**: The year in which the transponder code in the transponder built in the ignition key is registered with ECM

INPUT MONTH
1 – 12: The month in which the transponder code in the transponder built in the ignition key is registered with ECM

Immobilizer Indicator Light Does Not Come ON with Ignition Switch ON and Engine Stop

S6JB0BA304006

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

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

Troubleshooting

Step

Action

Yes

No

1

Immobilizer indicator 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.

2

Diagnostic Trouble Code (DTC) check
1) Check if DTC P1674, P1675, P1678 and/or P1685 are

detected by ECM referring to “Diagnostic Trouble Code
(DTC) Check”.

Is any of them detected?

Perform the
troubleshooting
referring to the
corresponding flowchart
in Section 1A.

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

3

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.

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 “G28-13” and “G28-15”

wire terminals of combination meter connector.

3) If OK, turn the ignition switch to ON position and

measure voltage between “G28-13” wire terminal of
combination meter and vehicle body ground.

Is it 10 – 14 V?

Go to Step 5.

Repair open in power
supply wire circuit.

5

Combination meter ground wire circuit check
1) Turn ignition switch OFF position.
2) Measure resistance between “G28-15” terminal of

combination meter connector and vehicle body ground.

Is resistance 1

Ω

or less?

Replace combination
meter with a know-good
one and recheck. If the
immobilizer indicator
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: 10C-9

Immobilizer Indicator Light Remains ON after Engine Start

S6JB0BA304007

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

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

Troubleshooting

Step

Action

Yes

No

1

Diagnostic Trouble Code (DTC) check
1) Start engine.
2) Check if any DTC is detected by ECM referring to

“Diagnostic Trouble Code (DTC) Check”.

Is any DTC detected?

Go to “Immobilizer
Control System Check”.

Go to Step 2.

2

CAN communication wire circuits check
1) Check CAN communication wire circuits between

combination meter and ECM referring to “DTC U0073:
Control Module Communication Bus Off in Section 1A”.

Are wire circuits in good condition?

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

Repair the malfunctional
wire circuit.

10C-10 Immobilizer Control System:

DTC P1614: Transponder Response Error

S6JB0BA304008

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

Detecting Condition and Trouble Area

Troubleshooting

Detecting Condition

Trouble Area

Transponder code in the transponder built in the ignition
key cannot be read through immobilizer control module
(ICM).

• Use of the ignition key without the transponder
• Use of the unregistered ignition key
• Corruption of the transponder in the 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”.

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

Trouble Code (DTC) Check”.

Is DTC P1614 still detected?

Go to Step 2.

The troubleshooting is
completed.

2

Diagnostic Trouble Code (DTC) check
1) Check if any DTC other than P1614 is detected referring

to “Diagnostic Trouble Code (DTC) Check”.

Is any DTC other than P1614 is detected?

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

Go to Step 3.

3

Registration of the ignition key in use with ECM and
Diagnostic Trouble Code (DTC) Check
1) There is a possibility that the unregistered ignition key is

used. Therefore, register the transponder code in the
transponder in the ignition key with ECM referring to
“Registration of the Ignition Key”.

2) Check if DTC P1614 is detected referring to “Diagnostic

Trouble Code (DTC) Check”.

Is DTC P1614 detected?

Go to Step 4.

The troubleshooting is
completed.

4

Registration of the new ignition key with ECM and
Diagnostic Trouble Code (DTC) check
1) The transponder in the ignition key is corrupted or the

ignition key without the transponder is used. Therefore,
prepare the new ignition key.

2) Register the transponder code in the transponder in the

new ignition key with ECM referring to “Registration of
the Ignition Key”.

3) Check if that DTC P1614 is detected referring to

“Diagnostic Trouble Code (DTC) Check”.

Is DTC P1614 detected?

Go to Step 5.

The troubleshooting is
completed.

5

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

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

Is immobilizer control module (ICM) normal?

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

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

Immobilizer Control System: 10C-11

DTC P1615: Steering Lock Unit Communication Error (for Vehicle with Keyless Start System)

S6JB0BA304009

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

Circuit Description
When the transponder code in the ignition key is registered in ECM, the remote controller ID code is registered in both
ECM and keyless start control module at the same time. This DTC is detected only in case that the remote controller
ID code cannot be registered in both ECM and keyless start control module when the transponder code in the ignition
key is registered in ECM.

NOTE

• Perform the troubleshooting for DTC P1618 first if both DTC P1615 and P1618 are detected at the

same time.

• After replacing ECM, be sure to register the transponder code in the ignition key with ECM referring

to “Registration of the Ignition Key”. After replacing the keyless start control module of the vehicle
equipped with the keyless start system, be sure to perform “Registration of the Ignition Key”.

Detecting Condition and Trouble Area

Troubleshooting

Detecting Condition

Trouble Area

• While registering the transponder code in ECM, the

keyless start control module sent a signal to ECM
indicating that the remote controller ID code could not
be registered.

• The remote controller ID code could not be registered in

the keyless start control module or ECM. And, the
registration of the transponder code in ECM was
terminated forcibly.

• Wire circuits between steering lock unit and keyless

start control unit open or shorted

• CAN communication wire circuits faulty
• Steering lock unit faulty
• Keyless start 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”.

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

Trouble Code (DTC) Check”.

Is DTC P1615 still detected?

Go to Step 2.

The troubleshooting is
completed.

2

Registration of the ignition key
1) Turn the ignition switch to OFF position.
2) Turn the ignition switch to ON position, and register the

transponder code in the transponder in the ignition key
with ECM referring to “Registration of the Ignition Key”.

Was it possible to register the ignition key (transponder
code) in ECM?

The troubleshooting is
completed.

Go to Step 3.

3

Diagnostic Trouble Code (DTC) check
1) Check if any DTC is detected referring to “Diagnostic

Trouble Code (DTC) Check”.

Is any DTC detected?

Go to Step 4.

Replace ECM with a
known-good one and
recheck.

4

Diagnostic Trouble Code (DTC) check

Is any DTC other than P1615 detected in Step 3?

Perform the
troubleshooting
referring to the
corresponding
flowchart.

Go to Step 5.