If the necessary data cannot be received from KOS-ECU via CAN during the certification communication with KOS-ECU, OSS-ECU sets the diagnosis code No.B1139, and displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.
JUDGEMENT CRITERIA
Check Conditions
At KOS-ECU certification
Judgment Criterion
During the certification communication with KOS-ECU, the necessary data cannot be received from KOS-ECU via CAN.
PROBABLE CAUSES
Malfunction of the CAN bus line
Malfunction of KOS-ECU
Malfunction of OSS-ECU
DIAGNOSIS PROCEDURE
1.M.U.T.-III CAN bus diagnosis (after turning the forced power supply output to "IG-ON" using the M.U.T.-III) 2.KOS diagnosis code check (after turning the forced power supply output to "IG-ON" using the M.U.T.-III) 3.OSS-ECU diagnosis code recheck