Inspection Procedure 11: The column switch signal is not received.


caution Before replacing the ECU, ensure that the communication circuit is normal.

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of column switch
  • Faulty LIN bus line

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?
Refer to Diagnosis code chart .
Go to Step 2.

STEP 2. Column switch check

  • Check the continuity for wiper switch. Refer to .
  • Check the continuity for column switch (switch body part). Refer to .

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the column switch.