Description

Washer motor circuit malfunction

Detection condition

• Electrical supply unit (ESU) detects an open circuit in the washer motor circuit with the ignition switched ON (engine off or on).

Fail-safe

Not applicable

Possible cause

• Washer motor connector or terminal malfunction

• Open circuit in wiring harness between washer motor terminal A and body ground

• Washer motor malfunction

• Electrical supply unit (ESU) connector or terminal malfunction

• Open circuit in wiring harness between washer motor terminal B and electrical supply unit (ESU) terminal 4B

• Electrical supply unit (ESU) malfunction

Step

Inspection

Action

1

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the washer motor connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

2

• Verify that the washer motor connector is disconnected.

• Inspect for continuity between washer motor terminal A (wiring harness-side) and body ground.

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between washer motor terminal A and body ground.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 6.

3

• Inspect the washer motor.

  (See WASHER MOTOR INSPECTION.)

• Is the washer motor normal?

Yes

Go to the next step.

No

Replace the washer motor, then go to Step 6.

(See WASHER MOTOR REMOVAL/INSTALLATION.)

4

• Disconnect the electrical supply unit (ESU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

5

• Verify that the washer motor and electrical supply unit (ESU) connectors are disconnected.

• Inspect for continuity between washer motor terminal B (wiring harness-side) and electrical supply unit (ESU) terminal 4B (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between washer motor terminal B and electrical supply unit (ESU) terminal 4B.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to the next step.

6

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the electrical supply unit (ESU) using the M-MDS.

  (See CLEARING DTC [ELECTRICAL SUPPLY UNIT (ESU)].)

• Operate the washer switch to ON position.

• Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.

  (See DTC INSPECTION [ELECTRICAL SUPPLY UNIT (ESU)].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the electrical supply unit (ESU).

  (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [ELECTRICAL SUPPLY UNIT (ESU)].)

No

DTC troubleshooting completed.