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DTC31: Transponder Code Not Registered
DTC Detecting Condition
Immobilizer Control Module checks if Transponder code transmitted from ignition key and that registered in
Immobilizer Control Module match when ignition switch is ON. If there is no Transponder code registered in
Immobilizer Control Module, this DTC is set.
Troubleshooting
Register ignition key with built-in transponder by using Suzuki Scan Tool and performing following steps.
1) Register Transponder code in Immobilizer Control Module by performing procedure described in "How to
Register Ignition Key".
2) Turn ignition switch OFF, then turn it ON and check that DTC31 is not set.
DTC12: Fault in Immobilizer Control Module
DTC Detecting Condition
This DTC is set when an internal fault is detected in Immobilizer Control Module.
Troubleshooting
Step
1
1) Ignition switch OFF.
2) Disconnect connectors from Immobilizer
Control Module.
3) Check for proper connection to Immobilizer
Control Module at all terminals.
Are they in good condition?
NOTE:
After replacing with a known-good Immobilizer Control Module, register ECM/Immobilizer Control
Module code in ECM and Transponder code and ECM/Immobilizer Control Module code in Immobilizer
Control Module by performing procedure described in "Procedure After Immobilizer Control Module
Replacement" in this section.
Action
IMMOBILIZER CONTROL SYSTEM 8G-13
Yes
Substitute a known-good
Immobilizer Control Module
and recheck.
See NOTE below.
No
Repair or replace.
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