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IMMOBILIZER CONTROL SYSTEM
WARNING:
For vehicles equipped with a Supplemental Restraint (Air Bag) System
• Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to "System Components and Wiring Location View" under "Gen-
eral Description" in air bag system section in order to confirm whether you are performing service
on or near the air bag system components or wiring. Please observe all WARNINGS and "Service
Precautions" under "On-Vehicle Service" in air bag system section before performing service on or
around the air bag system components or wiring. Failure to follow WARNINGS could result in unin-
tentional activation of the system or could render the system inoperative. Either of these two condi-
tions may result in severe injury.
• Technical service work must be started at least 90 seconds after the ignition switch is turned to the
"LOCK" position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
General Description ....................................... 8G-2
Immobilizer Control System Introduction ..... 8G-2
Immobilizer Control System Wiring
Circuit Diagram ............................................ 8G-3
On-Board Diagnostic System
Description ................................................... 8G-4
Diagnosis ........................................................ 8G-5
Precautions in Diagnosing Troubles ............ 8G-5
ECM ......................................................... 8G-5
Immobilizer Control Module...................... 8G-5
Intermittent troubles.................................. 8G-5
Immobilizer Control System Check .............. 8G-6
DTC Check................................................... 8G-7
Immobilizer Control Module...................... 8G-7
ECM ......................................................... 8G-7
DTC Table.................................................... 8G-8
Table A – Immobilizer Indicator Lamp
Check (Immobilizer Indicator Lamp Does
Not Light at Ignition Switch ON) ................... 8G-9
Table B – Immobilizer Indicator Lamp
Check (Immobilizer Indicator Lamp
Remains ON After Engine Starts) .............. 8G-10
Table C – Communication between
Suzuki Scan Tool and Immobilizer
Control Module is Not Established ............. 8G-11
DTC11/32: Transponder Code Not
Matched ..................................................... 8G-12
DTC31: Transponder Code Not
Registered.................................................. 8G-13
DTC12: Fault in Immobilizer Control
Module ....................................................... 8G-13
SECTION 8G
CONTENTS
DTC13: No Transponder Code
Transmitted or Coil Antenna Opened/
Shorted .......................................................8G-14
DTC21: ECM/Immobilizer Control
Module Code Not Matched (Immobilizer
Control Module Side) ..................................8G-15
DTC P1623: ECM/Immobilizer Control
Module Code Not Matched (ECM Side)......8G-15
DTC P1620: ECM/Immobilizer Control
Module Code Not Registered......................8G-15
DTC P1622: Fault in ECM ..........................8G-15
DTC22: Ignition Switch Circuit Open/
Short ...........................................................8G-16
DTC23: No ECM/Immobilizer Control
Module Code Transmitted From ECM
or DLC Circuit Opened/Shorted ..................8G-17
DTC P1621: No ECM/Immobilizer Control
Module Code Transmitted From
Immobilizer Control Module or DLC
Circuit Opened/Shorted ..............................8G-17
Inspection of ECM, Immobilizer Control
Module and Its Circuit .................................8G-19
On-Vehicle Service .......................................8G-20
Precautions in Handling Immobilizer
Control System ...........................................8G-20
Immobilizer Control Module Removal
and Installation............................................8G-21
How to Register Ignition Key.......................8G-22
Procedure After Immobilizer Control
Module Replacement ..................................8G-23
Procedure After ECM Replacement............8G-24
Special Tool...................................................8G-24
IMMOBILIZER CONTROL SYSTEM 8G-1
8G
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