Inspection Procedure 4: The rear washer does not work normally.


caution Whenever the ECU is replaced, ensure that the input and output circuits are normal.

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the washer motor
  • Malfunction of the column switch
  • The ETACS-ECU may be defective
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check that the windshield washers work.
Check that the windshield washers work normally.

Q. Is the check result normal?
Go to step 2.
Refer to Inspection Procedure 7 "Windshield washers do not work normally ."? Refer to .

STEP 2. M.U.T.-III diagnosis code.
Check if an ETACS-related diagnosis code is set.

Q. Is the diagnosis code set?
Diagnose the ETACS. (Refer to GROUP 54A - ETACS, Trouble Symptom Chart .)
Go to step 3.

STEP 3. M.U.T.-III data list
Check the input signal related to the rear washer operation.

  • Electric motor switch: ACC
  • Rear washer switch: ON
Item No.
 Item name
 Normal conditions
Item 83
 Rear washer output
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to step 4.
Refer to GROUP 54A - ETACS, Inspection Procedure 9 "The column switch signal is not received."? Refer to .

STEP 4. Check the washer motor.
Check that the rear washer motor works normally. (Refer to .)

Q. Is the check result normal?
Go to step 5.
Replace the washer motor.

STEP 5. Check the trouble symptom.
Check that the rear washer works normally.

Q. Is the check result normal?
Intermittent malfunction. Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .)
Replace the ETACS-ECU.