General Description; Ignition Key; Coil Antenna; Immobilizer Control Module - Suzuki Grand Vitara XL-7 Service Manual

8G-2 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
The immobilizer control system is designed to prevent vehicle burglar and consists of following components.
D Engine control module (ECM)
D Immobilizer Control Module
D Ignition key (with built-in transponder)
D Coil antenna
Operation of this system is as follows.
(1) Each ignition key has its own Transponder code stored in memory. When the ignition switch is turned ON, Immo-
bilizer Control Module tries to read the Transponder code through the coil antenna installed to the steering lock
assembly.
(2) Immobilizer Control Module compares the Transponder code read in (1) and that registered in Immobilizer Con-
trol Module and checks if they match.
(3) When it is confirmed that two Transponder codes match in Step (2), Immobilizer Control Module and ECM check
if ECU codes registered in them respectively match.
(4) Only when it is confirmed that ECU codes match, engine can be started (immobilizer system unlocked).
If Transponder codes in Step (2) or ECU codes in Step (3) do not match, ECM will stop operation of the injectors.

Ignition key

Transponder
code

GENERAL DESCRIPTION

(2)
Immobilizer
(1)
Control
Module
(4)
(3)

ECM

1. Coil antenna

2. Immobilizer Control Module

3. Data link connector (DLC)
4. Ignition key
5. ECM