Immobilizer Control Module; Ecm/Pcm; On-Board Diagnostic System (Self-Diagnosis Function) - Suzuki sq-416-420-625 Service Manual

8G-4 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)

1. Immobilizer Control Module

IMMOBILIZER CONTROL MODULE
Immobilizer Control Module is installed to the underside of the
instrument panel at the driver's seat side.
As main functions, Immobilizer Control Module checks matching
not only between the Transponder Code transmitted from the igni-
tion key and that registered in Immobilizer Control Module (Up to
4 different Transponder codes can be registered.) but also between
the ECM/Immobilizer Control Module code transmitted from
ECM/PCM and that registered in Immobilizer Control Module. In
addition, it has an on-board diagnostic system (self-diagnosis func-
tion) which is described in "On-Board Diagnostic System (Self-
Diagnosis Function)" in this section.

ECM/PCM

As main functions, ECM/PCM not only checks matching of ECM/
Immobilizer Control Module code but also has an on-board diag-
nostic system (self-diagnosis function) as described in "On-Board
Diagnostic System (Self-Diagnosis Function)" in this section.
For installation position of ECM/PCM, refer to Section 6E1 or 6E2.
ON-BOARD DIAGNOSTIC SYSTEM
(SELF-DIAGNOSIS FUNCTION)
Immobilizer Control Module and ECM/PCM diagnose troubles
which may occur in the area including the following parts when the
ignition switch is ON.
ECM/ DECM/Immobilizer
PCM: Control Module
code
DSerial data link
circuit
DECM/PCM
Immobilizer DTransponder code
DCoil antenna
Control
DECM/Immobilizer
Module:
DControl Module code
DSerial data link circuit
DImmobilizer Control
DModule
DIgnition signal