WIPER AND WASHER SYSTEM > Headlight Cleaner Switch Circuit

for Preparation Click here


DESCRIPTION

This circuit sends the signal for the headlight cleaner control relay to operate the headlight cleaner motor and pump assembly. The signal is send when the headlight cleaner switch or the front washer switch is turned ON.
The headlight cleaner does not work while the multiplex network body computer sends the signal that the daytime running light system is in operation.

WIRING DIAGRAM


E068983E01


INSPECTION PROCEDURE

1.INSPECT HEADLIGHT CLEANER CONTROL RELAY


    I036792E04

  1. Disconnect the connector from the headlight cleaner control relay.

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H - Body ground
    		light control switch HEAD, headlight cleaner switch OFF → ON
    		Below 1 V → 10 to 14 V



NG
Go to step 4
OK


2.INSPECT HEADLIGHT CLEANER CONTROL RELAY


    I036792E05

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    HDLO - Body ground
    		Engine idling, parking brake released, Light control switch OFF and shift in any position other than P position.
    		10 to 14 V



NG
Go to step 6
OK


3.INSPECT HEADLIGHT CLEANER CONTROL RELAY


    I036792E06

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance :
    Tester Connection
    		Condition
    		Specified Condition
    FRWA - Body ground
    		Front washer switch OFF → ON
    		10 kΩ or higher → Below 1 Ω



NG
Go to step 7
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

4.INSPECT HEADLIGHT CLEANER SWITCH ASSEMBLY


    E068137E01

  1. Disconnect the connector from the headlight cleaner switch.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    4 - 3
    		Headlight cleaner switch not pushed → pushed
    		10 kΩ or higher → Below 1 Ω



NG
REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY
OK


5.CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - INSTRUMENT PANEL J/B))


    I036792E07

  1. Disconnect the connector from the headlight cleaner control relay and instrument panel J/B.



  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H - 1H-13
    		Headlight cleaner switch not pushed → pushed
    		10 kΩ or higher → Below 1 Ω
    H - Body ground
    		Always
    		10 kΩ or higher


    E068613E06



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

6.CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - BODY ECU)


    I036792E08

  1. Disconnect the connector from the headlight cleaner and multiplex network body ECU.



  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    HDLO - HDLO
    		Always
    		Below 1 Ω
    HDLO - Body ground
    		Always
    		10 kΩ or higher


    I037578E01



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

7.INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

  1. Inspect the windshield wiper switch assembly (Click here).



NG
REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR