Suzuki SY413 Service Manual page 2355

DTC12 FAULT IN IMMOBILIZER CONTROL MODULE
DESCRIPTION:
This DTC is set when an internal fault is detected in Immobilizer Control Module.
INSPECTION:
STEP ACTION
1 1) Ignition switch OFF.
2) Disconnect connectors from
Immobilizer Control Module.
3) Check for proper connection to
Immobilizer Control Module at
all terminals.
Are they in good condition?
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-21
YES
Substitute a known-good Immobilizer Control
Module and recheck.
NOTE:
After replacing with a known-good Immobi-
lizer Control Module, register ECM/Immobi-
lizer Control Module code in ECM / PCM
and Transponder code and ECM/Immobiliz-
er Control Module code in Immobilizer
Control Module by performing procedure
described in "Procedure after Immobilizer
Control Module Replacement" section.
NO
Repair or replace.