Suzuki Wagon R Manual page 4063

8G4-8 IMMOBILIZER CONTROL SYSTEM (Z10XEP / Z12XEP ENGINE MODELS)
Diagnostic Trouble Code (DTC) Check
Immobilizer Control Module
1) Prepare SUZUKI scan tool.
2) With ignition switch OFF position (●), connect SUZUKI scan
tool to data link connector (DLC) (1) located under instru-
ment panel at driver's seat side.
Special tool
(A): SUZUKI scan tool
3) Turn ignition switch to ON position (II), and then read DTC
according to instructions displayed on SUZUKI scan tool. If
communication between scan tool and immobilizer control
module can not be established, check if SUZUKI scan tool is
communicable by connecting it to immobilizer control system
another vehicle. If communication is possible in this case,
SUZUKI scan tool is in good condition. Then, check data link
connector and serial data line (circuit) in the vehicle with
which communication can not be established.
NOTE:
DTC No. B3040, B3042 and B3043 can not be confirmed
by SUZUKI scan tool unless W-line circuit is repaired.
4) After completing the check, turn ignition switch to OFF posi-
tion and disconnect SUZUKI scan tool from DLC.
ECM
Refer to "Diagnostic Trouble Code (DTC) Check" in Section 6-4.
Diagnostic Trouble Code (DTC) Clearance
Immobilizer Control Module
1) Connect SUZUKI scan tool to data link connector located
under instrument panel at driver's seat side.
2) Turn ignition switch to ON position (II).
3) Erase DTC according to instructions displayed on SUZUKI
scan tool. Refer to scan tool operator's manual for further
details.
4) After completing the clearance, turn ignition switch to OFF
position and disconnect SUZUKI scan tool from DLC.
ECM
Refer to "Diagnostic Trouble Code (DTC) Check" in Section 6-4.