INSPECTION PROCEDURE 2: The rear wiper does not stop at the specified park position.

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


The rear wiper motor or the ETACS-ECU may be defective.


  • Defective rear wiper motor
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors


STEP 1. Check the rear wiper motor.

Refer to .

Q. Is the rear wiper motor normal?

Go to Step 2.
Replace the rear wiper motor.

STEP 2. Measure the voltage at rear wiper motor connector.

(1)Disconnect the connector, and measure the voltage at the wiring harness-side connector.
(2)Measure the voltage between rear wiper motor connector RWF terminal and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 4.
Go to Step 3.

STEP 3. Check of short to the power supply, short to earth and open circuit in RWAS line between rear wiper motor connector and ETACS-ECU connector.

Q. Is the check result normal?

Go to Step 4.
Repair the wiring harness.

STEP 4. M.U.T.-III data list

  • Check the input signal related to the rear wiper operation.
  • Ignition switch: ACC or ON
  • When rear wiper is operating
Item No.
Item name
Normal conditions
Item 292
Rear wiper auto stop switch
note Confirm that the M.U.T.-III displays from "ON" to "OFF" when rear wiper stops at the predetermined park position.
OK: Normal condition is displayed.

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.