Step 1. Check the operation of the windshield wipers.

Check that the windshield wipers work normally.

Q: Is the check result normal?

YES:  Go to Step 2.
NO:  Refer to Inspection Procedure G-1 "The windshield wipers do not work at all."

Step 2. Pulse check

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

System switch	Check conditions
Ignition switch (ACC)	When turned from the LOCK (OFF) position to the ACC position.
Windshield washer switch	When the switch is 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 ."
Windshield washer 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: A-26 windshield washer motor connector

Q: Is the check result normal?

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

Step 4. Check the windshield washer motor assembly.

Refer to GROUP 51 - Windshield washer.
YES:  Go to Step 5.
NO:  Replace the windshield washer motor.

Step 5. Measure the resistance at the A-26 windshield washer motor connector.

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

2. Continuity between A-26 windshield washer motor connector terminal No.1 and body earth
OK: 2Ω 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 A-26 windshield washer motor connector terminal No.1 and body earth.

• Check the earth wires for open 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: A-12X front-ECU connector

Q: Is the check result normal?

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

Step 8. Check the wiring harness between A-26 windshield washer motor connector terminal No.2 and A-12X front-ECU connector terminal No.31.

• Check the power supply line to the ignition switch (ACC) for open circuit.

Q: Is the check result normal?

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

Step 9. Retest the system.

The windshield washer should now work 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 front-ECU.