Inspection Procedure 9: The column switch signal is not received.
caution
Whenever the ECU is replaced, ensure that the communication circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU receives the column switch signal via the LIN communication. If there is an abnormality to column switch or LIN bus line, the lights and wiper/washer do not work normally.
PROBABLE CAUSES
Malfunction of column switch
Faulty LIN bus line
DIAGNOSIS PROCEDURE
M.U.T.-III diagnosis code
Check if diagnosis code is stored in the ETACS-ECU.