Suzuki GRAND VITARA JB416, Service Manual

Page: 451 / 474

Immobilizer Control System: 10C-13
8 Check for short to ground circuit in communication wire
circuit
1) With immobilizer control module (ICM) connector “G24”
and ECM connector “E23” disconnected, check
resistance between “G24-3” wire terminal at immobilizer
control module (ICM) connector and body ground.
Is resistance infinite?
Go to Step 9. Repair short to ground
wire circuit in
communication wire
circuit.
9 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 “G24-3” wire terminal at
immobilizer control module (ICM) connector and body
ground.
Is voltage 0 V?
Go to Step 10. Repair short to power
supply wire circuit in
communication wire
circuit.
10 Check for open 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 “E23-13” wire
terminal at ECM connector.
Is resistance infinite?
Repair open in
communication wire
circuit. Go to Step 11.
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.
Step Action Yes No