If any abnormal data is received from KOS-ECU as a result of the certification communication with KOS-ECU, OSS-ECU sets the diagnosis code No.B1140, 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 (at transition of power supply mode from OFF to ACC)
Judgment Criterion
As a result of the certification communication with KOS-ECU, OSS-ECU receives the abnormal data from KOS-ECU.
PROBABLE CAUSES
KOS-ECU malfunction (KOS-ECU has been interchanged between two vehicles, or various registrations are not complete after KOS-ECU replacement)
Malfunction of the CAN bus line
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-ECU 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