If DTC U1731 is stored, diagnose the CAN bus lines.
When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
When the OSS certification result is different from the engine status after the completion of engine starting permission communication, OSS-ECU determines that a problem has occurred, and stores DTC B1A28. At the same time, OSS-ECU displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.
DTC SET CONDITION
Check Conditions
At engine starting certification
Judgment Criterion
Certification result unmatch is received from engine control module.
TROUBLESHOOTING HINTS
Writing error of VIN to engine control module (engine control module has been interchanged between two vehicles, or VIN has not been written after engine control module replacement)
Malfunction of the CAN bus line
Malfunction of OSS-ECU
DIAGNOSIS
1. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
2. Checking whether OSS-ECU diagnosis trouble code No.B1161 is stored.
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