Wiper And Washer System Wiper Switch (Hi Speed) 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 LH (COWL SIDE J/B LH)

INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BODY GROUND)

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU LH (COWL SIDE J/B))

WIPER AND WASHER SYSTEM - Wiper Switch (HI Speed) Circuit


DESCRIPTION

The main body ECU LH (cowl side J/B LH) receives a HI position signal from the windshield wiper switch assembly to operate the wiper motor at HI speed.
Even if the ECU malfunctions, this circuit structure enables it to operate the wiper in HI operation mode.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Wiper Switch (Hi Speed) Circuit


INSPECTION PROCEDURE

1.CHECK MAIN BODY ECU LH (COWL SIDE J/B LH)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Wiper Switch (Hi Speed) Circuit

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Q2-11 (2S) - Body ground
    		Wiper switch not in HI position
    		10 to 14 V
    Q2-11 (2S) - Body ground
    		Wiper switch in HI position
    		Below 1 V


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Wiper Switch (Hi Speed) Circuit

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 (2S) - 5 (E)
    		Wiper switch in HI position
    		Below 1 Ω
    3 (2S) - 5 (E)
    		Wiper switch not in HI position
    		10 kΩ or higher


NG
REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY
OK


3.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Wiper Switch (Hi Speed) Circuit

  1. Disconnect the J26 windshield wiper switch assembly connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J26-5 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU LH (COWL SIDE J/B))


    Lexus Is250, Is220D. Gse20 Ale20.Wiper And Washer.Wiper And Washer System.Wiper And Washer System Wiper Switch (Hi Speed) Circuit

  1. Disconnect the Q2 main body ECU LH (cowl side J/B LH) connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J26-3 (2S) - Q2-11 (2S)
    		Always
    		Below 1 Ω
    Q2-11 (2S) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE