Inspection Procedure 1: Cannot communicate with KOS&OSS-ECU using the M.U.T.-III.
caution
When replacing the ECU, always check that the communication circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
KOS&OSS-ECU is communicating with M.U.T.-III via CAN. Therefore, communication error of KOS&OSS-ECU is suspected.
PROBABLE CAUSES
Malfunction of the power supply and the earth of KOS&OSS-ECU
Malfunction of CAN bus line
DIAGNOSIS PROCEDURE
1.
M.U.T.-III CAN bus diagnostics.
2.
Check the power supply circuit and the earth circuit to KOS&OSS-ECU.
3.
Retest the system.