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 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 column switch
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the column switch connector.

Check that the wiper and washer switch connector, the lighting switch connector and the switch body connector are in good condition.

Q. Is the check result normal?

	YES <LHD> : Go to Step 2.

	YES <RHD> : Go to Step 3.

	NO : Repair the defective connector.

STEP 2. Check the column switch (wiper and switch body).

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?

	Go to Step 3.

	Replace the column switch.

STEP 3. 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 4.

STEP 4. 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.