Suzuki Grand Vitara XL-7 Service Manual page 577

8G-4 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
IGNITION KEY
The ignition key for the immobilizer control system has a built-in
transponder. Each transponder in the key has an each transmitting
code (Transponder code). The code will transmitted from the key
via the coil antenna to Immobilizer Control Module when the ignition
switch is turned ON.
1. Ignition key with built-in transponder
COIL ANTENNA
The coil antenna is installed to the steering lock assembly. As it is
energized by Immobilizer Control Module, it transmits the trans-
ponder code of the ignition key to Immobilizer Control Module.
1. Coil antenna
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 ECU code transmitted from ECM and that registered in Immobi-
lizer Control Module. In addition, it has an on-board diagnostic sys-
tem (self-diagnosis function) which is described in the following
page.
1. Immobilizer Control Module
ECM
ECM checks matching of ECU code transmitted from immobilizer
control module and ECU code registered in ECM. After confirma-
tion of ECU codes, ECM is ready to start engine.