Suzuki Wagon R Manual page 4059

8G4-4 IMMOBILIZER CONTROL SYSTEM (Z10XEP / Z12XEP ENGINE MODELS)
Data Link Connector (DLC)
DLC (1) is in compliance with SAE J1962 in its installation posi-
tion, the shape of connector and pin assignment.
OBD-II serial data line (K line of ISO9141) is used for SUZUKI
scan tool to communicate with immobilizer control module, Air
bag SDM, ABS control module, etc.
On-board Diagnostic System
ECM and immobilizer control module diagnose troubles which
may occur in the area including the following parts when the igni-
tion switch is turned to ON position.
Immobilizer control module
• Immobilizer control module
• W-line (communication line between ECM and immobilizer
control module)
• Password
• SVS lamp circuit
• Transponder (ignition key)
• Fix code
ECM
• ECM
• Secret key (SK)
• Password (PWD)
When a trouble exists in the immobilizer control system (when
immobilizer control module or ECM detects a diagnostic trouble
code (DTC)), ECM stops operation of the injector and igniter.