Wiper And Washer System Wiper And Washer Switch Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER (WIPER SWITCH)

CHECK WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)

WIPER AND WASHER SYSTEM - Wiper and Washer Switch Circuit


DESCRIPTION

This circuit provides power to operate the windshield wiper switch assembly. The manual operation signals are sent to the main body ECU LH (cowl side J/B LH).

WIRING DIAGRAM


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


INSPECTION PROCEDURE

HINT:
Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output (Click here).
1.READ VALUE OF INTELLIGENT TESTER (WIPER SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester main switch on.

  1. Select the items below in the DATA LIST, and read the displays on the intelligent tester.

    Combination Switch:
    Item
    		Measurement Item / Display (Range)
    		Normal Condition
    		Diagnostic Note
    F Washer SW
    		Front washer switch / ON or OFF
    		ON: Front washer switch ON
    OFF: Front washer switch OFF
    		-
    F Wiper Mist SW
    		Front wiper MIST switch / ON or OFF
    		ON: Front wiper switch in MIST
    OFF: Wiper switch not in MIST
    		-
    F Wiper Hi SW
    		Front wiper HI switch / ON or OFF
    		ON: Front wiper switch in HI
    OFF: Wiper switch not in HI
    		-
    F Wiper Lo SW
    		Front wiper LO switch / ON or OFF
    		ON: Front wiper switch in LO
    OFF: Wiper switch not in LO
    		-
    F Wiper Int SW
    		Front wiper INT switch / ON or OFF
    		ON: Front wiper switch in INT
    OFF: Wiper switch not in INT
    		-
    IG SW Sig
    		Engine switch signal / ON or OFF
    		ON: Engine switch on (IG)
    OFF: Engine switch off
    		-
    F Wiper Vol Pos
    		Front wiper volume (sensitivity) / 0 to 90 degrees
    		0 degrees: FR wiper volume "+" position
    27 degrees: Switch is turned one notch towards the "-" side from the FR wiper volume "+" position
    63 degrees: Switch is turned one notch towards the "+" side from the FR wiper volume "-" position
    90 degrees: FR wiper volume "-" position
    		If the value is NG, replace the windshield wiper switch assembly (Click here).


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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


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

  1. Disconnect the J26 windshield wiper switch assembly connector.

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    J26-1 (B) - J26-5 (E)
    		Always
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)