WIPER AND WASHER SYSTEM (w/ Rain Sensor) 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 windshield wiper relay assembly.

WIRING DIAGRAM

A01ITWUE02

INSPECTION PROCEDURE

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 - BATTERY)


    1. A01INO2E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Windshield Wiper Switch Assembly)

      Disconnect the H15 switch connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H15-2 (+B) - Body ground Ignition switch ON 11 to 14 V
      H15-2 (+B) - Body ground Ignition switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY


    1. A01IN5BE02

      Remove the windshield wiper switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A-3 (+1) - A-1 (+S) Front wiper switch off Below 1 Ω
      A-3 (+1) - A-2 (+B) Front wiper switch MIST
      Front wiper switch LO
      A-2 (+B) - A-4 (+2) Front wiper switch HI
      A-9 (AUTO) - A-10 (E) Front wiper switch AUTO
      A-8 (VR2) - A-7 (VR1) Adjusting ring* changed from (+) side to (-) side Below 10 to 2700 Ω
      B-2 (EW) - B-3 (WF) Front washer switch on Below 1 Ω
      Front washer switch off 10 kΩ or higher

      Tech Tips

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


    NG

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (WIPER SWITCH - WIPER RELAY, HEADLIGHT CLEANER CONTROL RELAY AND BODY GROUND)


    • *1: w/ Headlight Cleaner System


    1. Disconnect the H14 and H15 switch connectors.

      A01IR5WE02

    2. Disconnect the H56 relay connector.

    3. Disconnect the A67*1 control relay connector.

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

      Standard Resistance
      w/ Headlight Cleaner System
      Tester Connection Condition Specified Condition
      H15-4 (+2) - H56-11 (+2) Always Below 1 Ω
      H15-4 (+2) - Body ground Always 10 kΩ or higher
      H15-1 (+S) - H56-10 (+1) Always Below 1 Ω
      H15-1 (+S) - Body ground Always 10 kΩ or higher
      H15-9 (AUTO) - H56-3 (C1) Always Below 1 Ω
      H15-9 (AUTO) - Body ground Always 10 kΩ or higher
      H15-10 (E) - H56-15 (CO) Always Below 1 Ω
      H15-10 (E) - Body ground Always 10 kΩ or higher
      H14-3 (WF) - H56-25 (W) Always Below 1 Ω
      H14-3 (WF) - Body ground Always 10 kΩ or higher
      H15-8 (VR2) - H56-8 (VR2) Always Below 1 Ω
      H15-8 (VR2) - Body ground Always 10 kΩ or higher
      H15-7 (VR1) - H56-21 (VR1) Always Below 1 Ω
      H15-7 (VR1) - Body ground Always 10 kΩ or higher
      H14-2 (EW) - Body ground Always Below 1 Ω
      A67-5 (FRWA) - H14-3 (WF) Always Below 1 Ω
      A67-5 (FRWA) - H56-25 (W) Always Below 1 Ω
      A67-5 (FRWA) - Body ground Always 10 kΩ or higher
      Standard Resistance
      w/o Headlight Cleaner System
      Tester Connection Condition Specified Condition
      H15-4 (+2) - H56-11 (+2) Always Below 1 Ω
      H15-4 (+2) - Body ground Always 10 kΩ or higher
      H15-1 (+S) - H56-10 (+1) Always Below 1 Ω
      H15-1 (+S) - Body ground Always 10 kΩ or higher
      H15-9 (AUTO) - H56-3 (C1) Always Below 1 Ω
      H15-9 (AUTO) - Body ground Always 10 kΩ or higher
      H15-10 (E) - H56-15 (CO) Always Below 1 Ω
      H15-10 (E) - Body ground Always 10 kΩ or higher
      H14-3 (WF) - H56-25 (W) Always Below 1 Ω
      H14-3 (WF) - Body ground Always 10 kΩ or higher
      H15-8 (VR2) - H56-8 (VR2) Always Below 1 Ω
      H15-8 (VR2) - Body ground Always 10 kΩ or higher
      H15-7 (VR1) - H56-21 (VR1) Always Below 1 Ω
      H15-7 (VR1) - Body ground Always 10 kΩ or higher
      H14-2 (EW) - Body ground Always Below 1 Ω
      Text in Illustration
      *1 w/ Headlight Cleaner System *2

      Front view of wire harness connector

      (to Windshield Wiper Switch Assembly)
      *3

      Front view of wire harness connector

      (to Windshield Wiper Relay Assembly)

      		 *4

      Front view of wire harness connector

      (to Headlight Cleaner Control Relay)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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