Step 1. Use the MUT-II/III to confirm a diagnosis code.

Check that the ETACS-ECU sets a diagnosis code.

Q: Is the check result normal?

YES:  Refer to diagnosis code chart .
NO:  Go to Step 2.

Step 2. Pulse check

Check the input signals below which are related to the rear wiper.

System switch	Check conditions
Ignition switch (ACC)	When turned from the LOCK (OFF) position to the ACC position
Column switch (rear wiper switch)	When the switch turned from off to on

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.

Q: Are the check result normal?

All the signals are received normally.:  Go to Step 3.
The ignition switch (ACC) signal is not received.:  Refer to inspection procedure P-1 "The ignition switch (ACC) signal is not received ."
The column switch (rear wiper switch) signal is not received.:  Refer to inspection procedure P-6 "The column switch (windshield wiper washer and rear wiper washer switch) signal is not received ."

Step 3. Connector check: F-02 rear wiper motor connector

Q: Is the check result normal?

YES:  Go to Step 4.
NO:  Repair the connector.

Step 4. Check the rear wiper motor.

Refer to GROUP 51 - Rear wiper and washer .
YES:  Go to Step 5.
NO:  Replace the rear wiper motor.

Step 5. Measure the resistance at the F-02 rear wiper motor connector.

1. Disconnect the connector, and measure at the wiring harness side.

2. Resistance between F-02 rear wiper motor connector terminal No.1 and body earth
OK: 2 Ω or less

Q: Is the check result normal?

YES:  Go to Step 7.
NO:  Go to Step 6.

Step 6. Check the wiring harness between F-02 rear wiper motor connector terminal No. 1 and body earth.

NOTE: Prior to the wiring harness inspection, check intermediate connector F-05, and repair if necessary.

• Check the earth line for open or short circuit.

Q: Is the check result normal?

YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Repair the wiring harness.

Step 7. Connector check: C-217 ETACS-ECU connector

Q: Is the check result normal?

YES:  Go to Step 8.
NO:  Repair the connector.

Step 8. Check the wiring harness between C-217 ETACS-ECU connector terminal No.16 and F-02 rear wiper motor connector terminal No.2.

NOTE: Prior to the wiring harness inspection, check intermediate connector F-05 and junction block connector C-221, and repair if necessary.

• Check the power supply line for open or short circuit.

Q: Is the check result normal?

YES:  Go to Step 9.
NO:  Repair the wiring harness.

Step 9. Retest the system.

Check that the rear wiper works normally.

Q: Is the check result normal?

YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Replace the ETACS-ECU.