Suzuki GRAND VITARA Owner's Manual page 1686

10C-14 Immobilizer Control System:
Troubleshooting
Step
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 P1618 still detected?
2 Diagnostic Trouble Code (DTC) check in ECM
Is any DTC other than P1618 detected in Step 1?
3 Poor connection check at ECM, ABS and keyless start
control module connectors
1) With the ignition key at OFF position, check each
connector and wire terminal at ECM, ABS and keyless
control module for secure connection.
Is each connector and wire terminal connected securely?
4 Check for open and high resistance in CAN
communication wire circuits between ABS and keyless
start control module
1) Disconnect connector "E03" from ABS referring to "ABS
Hydraulic Unit / Control Module Assembly Removal and
Installation: in Section 4E".
2) Disconnect connector "G42" from keyless start control
module referring to "Keyless start control module
Removal and Installation: in Section 10E".
3) Measure resistance at the following wire terminals.
• Between "E03-12" wire terminal at ABS connector
and "G42-19" wire terminal at keyless start control
module connector
• Between "E03-6" wire terminal at ABS connector and
"G42-18" wire terminal at keyless start control module
connector
Is each resistance 1
5 Check for short between CAN communication wire
circuits between ABS and keyless start control module
1) Disconnect connector "G31" from BCM connector
referring to "BCM Removal and Installation: in Section
10B".
2) Disconnect connector "G28" from combination meter
referring to "Combination Meter Removal and
Installation: in Section 9C".
3) Measure resistance between "E03-12" wire terminal at
ABS connector and "G42-18" wire terminal at keyless
start control module connector.
Is resistance infinite?
Action
Ω
or less?
Yes
Go to Step 2.
Perform the
troubleshooting
referring to the
corresponding
flowchart.
Go to Step 4.
Go to Step 5.
Go to Step 6.
No
The troubleshooting is
completed.
Go to Step 3.
Repair poor
connection(s).
Repair open or high
resistance in
malfunctional wire
circuit.
Repair short between
CAN communication
wire circuits.