WIPER AND WASHER SYSTEM Headlight Cleaner Switch Circuit

DESCRIPTION

This circuit detects the conditions (on or off) of the headlight cleaner switch assembly.

WIRING DIAGRAM

A0006WGE01
*a Instrument Panel Junction Block Assembly
*b Headlight Cleaner Switch Assembly
*c Headlight Cleaner Control Relay
*d Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

PROCEDURE


  1. INSPECT HEADLIGHT CLEANER CONTROL RELAY


    1. Disconnect the A43 headlight cleaner control relay connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A43-2 (H) - Body ground Light control switch off and headlight cleaner switch on 11 to 14 V
      A43-2 (H) - Body ground Headlight cleaner switch off Below 1 V

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT HEADLIGHT CLEANER SWITCH ASSEMBLY


    1. A000538E33
      Text in Illustration
      *a

      Component without harness connected

      (Headlight Cleaner Switch Assembly)

      Remove the headlight cleaner switch assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (L) - 4 (B) Headlight cleaner switch off 10 kΩ or higher
      1 (L) - 4 (B) Headlight cleaner switch on Below 1 Ω

    NG

    REPLACE HEADLIGHT CLEANER SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER SWITCH ASSEMBLY - HEADLIGHT CLEANER CONTROL RELAY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H5-4 (B) - A43-2 (H) Always Below 1 Ω
      H5-4 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - HEADLIGHT CLEANER SWITCH ASSEMBLY)


    1. Disconnect the 3A instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-43 - H5-1 (L) Always Below 1 Ω
      3A-43 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A0006U8E01
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-43 - MB-15 (HRLY) Always Below 1 Ω
      3A-43 - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here