Inspection Procedure C-7: 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/washer 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

PROBABLE CAUSES

  • Malfunction of the wiper/washer switch
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III 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 (wiper/washer switch) sends signal.
(1)Replace the wiper/washer switch.
(2)Check if the column switch (wiper/washer switch) sends signal.

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