Headlight Cleaner Switch Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Headlight Cleaner Switch Circuit
- Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit detects the conditions of the headlight cleaner switch.

The headlight cleaner control relay receives the following signals:

* Headlight cleaner switch signal

* Headlight operating signal

* Daytime running light operating signal

* Front washer motor operating signal

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK MAIN BODY ECU RH (HDLO SIGNAL)





(a) Measure the voltage of the connector.

Standard voltage:





NG -- CHECK WIRE HARNESS (RELAY - MAIN BODY ECU RH)
OK -- Continue to next step.

2. CHECK FRONT LIGHT ECU (FRONT WINDOW WASHER SIGNAL)





(a) Measure the voltage of the connector.

Standard voltage:





NG -- CHECK WIRE HARNESS (RELAY - FRONT LIGHT ECU)
OK -- Continue to next step.

3. CHECK WIRE HARNESS (SWITCH - BATTERY AND BODY GROUND)





(a) Disconnect the K12 switch connector.

(b) Measure the voltage of the wire harness side connector.

Standard voltage:





(c) Measure the resistance of the wire harness side connector.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HEADLIGHT CLEANER CONTROL RELAY





(a) Disconnect the K12 switch connector.

(b) Measure the voltage of the wire harness side connector.

Standard voltage:





NG -- CHECK WIRE HARNESS (RELAY - SWITCH)
OK -- Continue to next step.

5. CHECK MAIN BODY ECU RH (HRLY SIGNAL)





(a) Measure the voltage of the connector.

Standard voltage:





NG -- CHECK WIRE HARNESS (SWITCH - MAIN BODY ECU RH)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

6. CHECK WIRE HARNESS (RELAY - MAIN BODY ECU RH)





(a) Disconnect the A5 relay connector.

(b) Disconnect the A39 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

7. CHECK WIRE HARNESS (RELAY - FRONT LIGHT ECU)





(a) Disconnect the A5 relay connector.

(b) Disconnect the 1X ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

8. CHECK WIRE HARNESS (SWITCH - MAIN BODY ECU RH)





(a) Disconnect the K12 switch connector.

(b) Disconnect the DL ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

9. CHECK WIRE HARNESS (RELAY - SWITCH)





(a) Disconnect the A5 relay connector.

(b) Disconnect the K12 switch connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE