Inspection Procedure P-6: The column switch (windshield wiper washer and rear wiper washer switch) signal is not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.


COMMENTS ON TROUBLE SYMPTOM
Input signal from the column switch (wiper switch) is used to operate the functions below. If the signal is abnormal, these functions will not work normally.

  • Windshield wiper and washer
  • Rear wiper and washer

POSSIBLE CAUSES

  • Malfunction of the column switch
  • Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Use the M.U.T.-III to confirm a diagnosis code.
Check that the ETACS-ECU sets a diagnosis code.

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

Step 2. Retest the system.
Replace the column switch, and check if the column switch (windshield wiper washer and rear wiper washer switch) sends signal.
(1)Replace the column switch.
(2)Check if the column switch (windshield wiper/washer and rear wiper washer switch) sends signal.

Q. Is the check result normal?
The procedure is complete.
Replace the ETACS-ECU.