When the diagnosis code No.B1161 is set, be sure to diagnose the CAN bus line.
When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSTIC FUNCTION
When the chassis number registered in OSS-ECU is different from the chassis number transmitted by engine-ECU on the CAN bus line, OSS-ECU sets the diagnosis code No.B1161.
JUDGEMENT CRITERIA
Check Conditions
When all the following conditions are met.
Power supply mode: ON
Chassis number written in OSS-ECU
Judgment Criterion
The chassis number received via CAN communication is different from the chassis number written in OSS-ECU.
PROBABLE CAUSES
Malfunction of the CAN bus line
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 OSS-ECU
DIAGNOSIS PROCEDURE
1.M.U.T.-III CAN bus diagnosis 2.Check of chassis number in engine-ECU 3.OSS-ECU diagnosis code recheck