Suzuki GRAND VITARA JB416 Service Manual page 451

Step
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?
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?
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?
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?
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?
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?
Action
Immobilizer Control System:
Yes
Go to Step 9.
Go to Step 10.
Repair open in
communication wire
circuit.
Go to Step 12.
Go to Step 13.
Go to Step 14.
10C-13
No
Repair short to ground
wire circuit in
communication wire
circuit.
Repair short to power
supply wire circuit in
communication wire
circuit.
Go to Step 11.
Repair short to ground
wire circuit in
communication wire
circuit.
Repair short to power
supply wire circuit in
communication wire
circuit.
Repair short of
communication wire
circuits.