WIPER AND WASHER SYSTEM Wiper Switch (HI Speed) Circuit

DESCRIPTION

The main body ECU LH (cowl side junction block LH) receives a HI position signal from the windshield wiper switch assembly to operate the wiper motor at high speed.

Even if the ECU malfunctions, this circuit structure enables it to operate the wiper in HI operation mode.

WIRING DIAGRAM

A01625AE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)


    1. A015YLPE14

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

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

    NG

    INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY


    1. Remove the windshield wiper switch assembly Click here.

    2. A0161M4E01

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

      Standard Resistance
      Tester Connection Switch 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 Click here

    OK

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


    1. A015YUQE11

      Disconnect the J26 windshield wiper switch assembly connector.

    2. 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 ASSEMBLY - MAIN BODY ECU LH)


    1. A01611EE01

      Disconnect the Q2 main body ECU LH (cowl side junction block LH) connector.

    2. 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 Click here