Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 537

10C-9 Immobilizer Control System: For Petrol Engine Model

Immobilizer Indicator Lamp Remains ON after Engine Start

S6JB0AA314007

Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram: For Petrol 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
immobilizer indicator lamp in case that there is not any problem with the immobilizer control system. Then, the
combination meter turns ON the lamp. When the engine is started up, ECM transmits the indication OFF signal to the
combination meter to turn OFF the lamp. Then, the combination meter turns OFF the immobilizer indicator lamp.
However, in case that there is some trouble with the immobilizer control system, the immobilizer indicator lamp flashes
ON and OFF when the ignition switch is turned ON.

Troubleshooting

DTC P1614: Transponder Response Error

S6JB0AA314008

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

Detecting Condition and Trouble Area

Step

Action

Yes

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

“Diagnostic Trouble Code (DTC) Check: For Petrol
Engine Model”.

Is any DTC detected?

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

Go to Step 2.

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

combination meter and ECM referring to “DTC P1674:
CAN Communication (Bus Off Error): For Petrol Engine
Model in Section 1A”.

Are wire circuits in good condition?

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

Repair the malfunctional
wire circuit.

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

Immobilizer Control System: For Petrol Engine Model 10C-10

Troubleshooting

Step

Action

Yes

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

(DTC) Clearance: For Petrol Engine Model”.

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

Trouble Code (DTC) Check: For Petrol Engine Model”.

Is DTC P1614 still detected?

Go to Step 2.

The troubleshooting is
completed.

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

to “Diagnostic Trouble Code (DTC) Check: For Petrol
Engine Model”.

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.

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: For Petrol Engine
Model”.

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

Trouble Code (DTC) Check: For Petrol Engine Model”.

Is DTC P1614 detected?

Go to Step 4.

The troubleshooting is
completed.

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: For Petrol Engine Model”.

3) Check if that DTC P1614 is detected referring to

“Diagnostic Trouble Code (DTC) Check: For Petrol
Engine Model”.

Is DTC P1614 detected?

Go to Step 5.

The troubleshooting is
completed.

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

“Inspection of Immobilizer Control Module (ICM) and Its
Circuit: For Petrol Engine Model”.

Is immobilizer control module (ICM) normal?

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

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

10C-11 Immobilizer Control System: For Petrol Engine Model

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

S6JB0AA314009

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

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: For Petrol Engine Model”. 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: For Petrol Engine Model”.

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

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

(DTC) Clearance: For Petrol Engine Model”.

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

Trouble Code (DTC) Check: For Petrol Engine Model”.

Is DTC P1615 still detected?

Go to Step 2.

The troubleshooting is
completed.

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:
For Petrol Engine Model”.

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

The troubleshooting is
completed.

Go to Step 3.

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

Trouble Code (DTC) Check: For Petrol Engine Model”.

Is any DTC detected?

Go to Step 4.

Replace ECM with a
known-good one and
recheck.

Immobilizer Control System: For Petrol Engine Model 10C-12

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.

Steering lock unit check
1) Turn on the engine start knob of the keyless start

system.

Is the engine start knob at ON position?

Replace the steering
lock unit with a known-
good one and recheck.

Go to Step 6.

Steering lock unit operation check
1) Check the steering lock unit for operation referring to

“Ignition Switch Inspection in Section 9C”.

Does the engine start knob operate as specified?

Go to Step 7.

Replace the steering
lock unit referring to
“Steering Lock
Assembly (Ignition
Switch) Removal and
Installation in Section
6B”.

Check for open in wire circuits between steering lock
unit and keyless start control module
1) Disconnect steering lock unit connector “G22” and

keyless start control module connector “G42”.

2) Measure resistance at the following connector terminals.

• Between “G22-3” terminal of steering lock unit

connector and “G42-20” terminal of keyless start
control module connector.

• Between “G22-7” terminal of steering lock unit

connector and “G42-29” terminal of keyless start
control module connector.

• Between “G22-8” terminal of steering lock unit

connector and “G42-30” terminal of keyless start
control module connector.

Is each resistance 1

Ω

or less?

Go to Step 8.

Repair open or high
resistance in
malfunctional wire
circuit.

Check for short of wire circuits between steering lock
unit and keyless start control module
1) Measure resistance at the following connector terminals.

• Between “G22-3”, “G22-7” and “G22-8” terminal of

steering lock unit connector.

• Between “G42-20”, “G42-29” and “G42-30” terminal of

keyless start control module.

Is each resistance infinity?

Go to Step 9.

Make sure of insulation
of each wire circuit.

Step

Action

Yes

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