STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line
STEP 2. Using scan tool (M.U.T.-IIISE), check the DTC.
STEP 3. Using scan tool (M.U.T.-IIISE), check the other system DTC.
STEP 4. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from "OFF" to "ON."
(3) On completion, check that the DTC is not set again.
Is the DTC set?
Replace the KOS&OSS-ECU and register the ID codes (Refer to ). Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).