If the diagnosis code No. B1A28 is set, 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 sets the diagnosis code No.B1A28. At the same time, OSS-ECU displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.
JUDGEMENT CRITERIA
Check Conditions
At engine starting certification
Judgment Criterion
Certification result unmatch is received from engine-ECU.
PROBABLE CAUSES
Writing error of chassis number to engine-ECU (engine-ECU has been interchanged between two vehicles, or chassis number has not been written after engine-ECU replacement)
Malfunction of the CAN bus line
Malfunction of OSS-ECU
DIAGNOSIS PROCEDURE
1.M.U.T.-III CAN bus diagnosis 2.Checking whether OSS-ECU diagnosis code No.B1161 is set 3.OSS-ECU diagnosis code recheck