Suzuki SY413 Service Manual page 2363

1. Immobilizer Control Module
2. Coupler
3. Body ground
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-29
INSPECTION OF ECM/PCM, IMMOBILIZER CON-
TROL MODULE AND ITS CIRCUIT
ECM/PCM, Immobilizer Control Module and its circuit can be
checked at ECM/PCM wiring couplers and Immobilizer Control
Module wiring coupler by measuring voltage and resistance. De-
scribed here is only inspection of Immobilizer Control Module. For
inspection of ECM/PCM, refer to "Engine and Emission Control
System" section in Service Manual for the vehicle being serviced.
CAUTION:
Immobilizer Control Module cannot be checked by itself.
It is strictly prohibited to connect voltmeter or ohmmeter
to Immobilizer Control Module with coupler discon-
nected from it.
Voltage Check
1) Remove Immobilizer Control Module from body with ignition
switch OFF referring to IMMOBILIZER CONTROL MODULE
REMOVAL in this section.
2) Connect Immobilizer Control Module couplers to Immobilizer
Control Module.
3) Check voltage at each terminal of couplers connected.
NOTE:
As each terminal voltage is affected by the battery voltage,
confirm that it is 11V or more when ignition switch is ON.