Wiper And Washer System Headlight Cleaner Switch Circuit

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Wiper And Washer. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) (HDLO SIGNAL)

INSPECT FRONT CONTROLLER (ENGINE ROOM NO. 2 J/B) (FRWA SIGNAL)

CHECK HEADLIGHT CLEANER SWITCH ASSEMBLY

CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) (HRLY SIGNAL)

CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - MAIN BODY ECU RH)

CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - FRONT CONTROLLER)

CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - MAIN BODY ECU RH)

WIPER AND WASHER SYSTEM - Headlight Cleaner Switch Circuit


DESCRIPTION

This circuit detects the conditions (on or off) of the headlight cleaner switch.
The headlight cleaner control relay receives the following signals:
  1. Headlight cleaner switch signal
  2. Headlight operating signal
  3. Daytime running light operating signal
  4. Front washer motor operating signal

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit


INSPECTION PROCEDURE

1.CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) (HDLO SIGNAL)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A36-4 (HDLO) - Body ground
    		Engine switch on (IG) and light control switch OFF
    		10 to 14 V
    A36-4 (HDLO) - Body ground
    		Engine switch on (IG) and light control switch in HEAD position
    		Below 1 V


NG
Go to step 5
OK


2.INSPECT FRONT CONTROLLER (ENGINE ROOM NO. 2 J/B) (FRWA SIGNAL)


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


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit


    Standard voltage:

    Tester Connection
    		Condition
    		Specified Condition
    2F-8 (FRWA) - Body ground
    		Engine switch on (IG) and front washer is stopped
    		10 to 14 V
    2F-8 (FRWA) - Body ground
    		Engine switch on (IG) and front washer is operated
    		Below 1 V


NG
Go to step 6
OK


3.CHECK HEADLIGHT CLEANER SWITCH ASSEMBLY
Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit

  1. Disconnect the connector from the headlight cleaner switch assembly.

  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
    		10 kΩ or higher
    4 - 3
    		Headlight cleaner switch pushed
    		Below 1 Ω


NG
REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY
OK


4.CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) (HRLY SIGNAL)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    RL-7 (HRLY) - Body ground
    		Engine switch on (IG) and headlight cleaner switch OFF
    		Below 1 V
    RL-7 (HRLY) - Body ground
    		Engine switch on (IG) and headlight cleaner switch ON
    		10 to 14 V


NG
Go to step 7
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

5.CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - MAIN BODY ECU RH)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit

  1. Disconnect the A3 headlight cleaner control relay connector.

  1. Disconnect the A36 main body ECU RH (cowl side J/B RH) connector.

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

    Standard resistance:
    Tester Connector
    		Condition
    		Specified Condition
    A3-1 (HDLO) - A36-1 (HDLO)
    		Always
    		Below 1 Ω
    A3-1 (HDLO) - Body ground
    		Always
    		10 k Ω or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - MAIN BODY ECU RH)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU RH (COWL SIDE J/B RH) - BATTERY)

6.CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - FRONT CONTROLLER)

  1. Disconnect the 2F front controller (engine room No. 2 J/B) connector.



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


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit


    Standard resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A3-5 (FRWA) - 2F-8 (FRWA)
    		Always
    		Below 1 Ω
    A3-5 (FRWA) - Body ground
    		Always
    		10 k Ω or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - FRONT CONTROLLER)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT CONTROLLER (OVERHEAD J/B) - BATTERY)

7.CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - MAIN BODY ECU RH)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Headlight Cleaner Switch Circuit

  1. Disconnect the J13 headlight cleaner switch assembly connector.

  1. Disconnect the RL main body ECU RH (cowl side J/B RH) connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J13-4 (L) - RL-7 (HRLY)
    		Always
    		Below 1 Ω
    RL-7 (HRLY) - Body ground
    		Always
    		10 k Ω or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - MAIN BODY ECU RH)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU RH (COWL SIDE J/B RH) - BATTERY)