WIPER AND WASHER SYSTEM Wiper and Washer Switch Circuit

DESCRIPTION

This circuit detects the state of the windshield wiper switch assembly (front wiper switch and front washer switch) and sends it to the windshield wiper relay assembly.

WIRING DIAGRAM

A0029UME01

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - IG CIRCUIT)


    1. Disconnect the F64 windshield wiper switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F64-2 (+B) - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      F64-10 (+B2) - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    OK

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


    1. Disconnect the F65 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
      F65-4 (EW) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY


    1. A0027JRC03
      *1 Windshield Wiper Switch Assembly (Adjusting Ring Position)
      *a

      Component without harness connected

      (Windshield Wiper Switch Assembly)

      Remove the windshield wiper switch assembly.

      Click here

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

      Standard Resistance
      Front Wiper Switch
      Tester Connection Condition Specified Condition
      F64-2 (+B) - F64-3 (+1) MIST Below 1 Ω
      F64-3 (+1) - F64-1 (+S) OFF
      F64-3 (+1) - F64-1 (+S) AUTO
      F64-8 (AUTO) - F64-9 (E)
      F64-2 (+B) - F64-3 (+1) LO
      F64-2 (+B) - F64-4 (+2) HI
      Front Washer Switch
      Tester Connection Condition Specified Condition
      F65-4 (EW) - F65-7 (WF) ON Below 1 Ω
      F64-5 (WR) - F64-10 (+B2)
      F65-4 (EW) - F65-7 (WF) OFF 10 kΩ or higher
      F64-5 (WR) - F64-10 (+B2)
      Adjusting Ring*
      Tester Connection Condition Specified Condition
      F64-6 (VR2) - F64-7 (VR1) P1 209 to 231 Ω
      P2 114 to 126 Ω
      P3 58.9 to 65.1 Ω
      P4 Below 1 Ω

      Tech Tips

      *: The rain sensor sensitivity can be adjusted by the windshield wiper switch assembly adjusting ring.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY)


    1. Disconnect the F79 windshield wiper relay assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-1 (+S) - F79-10 (+1) Always Below 1 Ω
      F64-1 (+S) or F79-10 (+1) - Body ground Always 10 kΩ or higher
      F64-9 (E) - F79-5 (CO) Always Below 1 Ω
      F64-9 (E) or F79-5 (CO) - Body ground Always 10 kΩ or higher
      F64-8 (AUTO) - F79-3 (C1) Always Below 1 Ω
      F64-8 (AUTO) or F79-3 (C1) - Body ground Always 10 kΩ or higher
      F64-6 (VR2) - F79-8 (VR2) Always Below 1 Ω
      F64-6 (VR2) or F79-8 (VR2) - Body ground Always 10 kΩ or higher
      F64-7 (VR1) - F79-21 (VR1) Always Below 1 Ω
      F64-7 (VR1) or F79-21 (VR1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY)


    1. Disconnect the A39 windshield washer motor and pump assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F65-7 (WF) - F79-25 (W) Always Below 1 Ω
      F65-7 (WF) or F79-25 (W) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F65-7 (WF) - A39-2 Always Below 1 Ω
      F64-5 (WR) - A39-1 Always Below 1 Ω
      F65-7 (WF) or A39-2 - Body ground Always 10 kΩ or higher
      F64-5 (WR) or A39-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WIPER MOTOR ASSEMBLY)


    1. Disconnect the A32 windshield wiper motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-3 (+1) - A32-5 (+1) Always Below 1 Ω
      F64-4 (+2) - A32-3 (+2) Always Below 1 Ω
      F64-3 (+1) or A32-5 (+1) - Body ground Always 10 kΩ or higher
      F64-4 (+2) or A32-3 (+2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-4 (+2) - F79-11 (+2) Always Below 1 Ω
      F64-4 (+2) or F79-11 (+2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 4F instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A32-2 (B) - 4F-1 Always Below 1 Ω
      A32-2 (B) or 4F-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A002CMRC01
      *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
      4F-1 - 4F-10 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  11. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 4A and 4F instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-2 (+B) - 4F-10 Always Below 1 Ω
      F64-10 (+B2) - 4A-35 Always Below 1 Ω
      F64-2 (+B) or 4F-10 - Body ground Always 10 kΩ or higher
      F64-10 (+B2) or 4A-35 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR