WIPER AND WASHER SYSTEM Wiper and Washer Switch Circuit

DTC Code DTC Name
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

E266578E01

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

    1. E265178C01

      *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

      Table 1. Front Wiper Switch

      Tester Connection

      Condition

      Specified Condition

      E10-2 (+B) - E10-3 (+1)

      MIST

      Below 1 Ω

      E10-3 (+1) - E10-1 (+S)

      OFF

      E10-3 (+1) - E10-1 (+S)

      AUTO

      E10-8 (AUTO) - E10-9 (E)

      E10-2 (+B) - E10-3 (+1)

      LO

      E10-2 (+B) - E10-4 (+2)

      HI
      Table 2. Rear Wiper Switch (w/ Rear Wiper)

      Tester Connection

      Condition

      Specified Condition

      E9-2 (C1R) - E9-4 (EW)

      OFF

      10 kΩ or higher

      E9-3 (+1R) - E9-4 (EW)

      E9-2 (C1R) - E9-4 (EW)

      INT

      Below 1 Ω

      E9-3 (+1R) - E9-4 (EW)

      ON
      Table 3. Front Washer Switch

      Tester Connection

      Condition

      Specified Condition

      E9-4 (EW) - E9-7 (WF)

      ON

      Below 1 Ω

      E10-5 (WR) - E10-10 (+B2)

      E9-4 (EW) - E9-7 (WF)

      OFF

      10 kΩ or higher

      E10-5 (WR) - E10-10 (+B2)
      Table 4. Rear Washer Switch (w/ Rear Wiper)

      Tester Connection

      Condition

      Specified Condition

      E9-4 (EW) - E10-5 (WR)

      ON

      Below 1 Ω

      E9-7 (WF) - E10-10 (+B2)

      E9-4 (EW) - E10-5 (WR)

      OFF

      10 kΩ or higher

      E9-7 (WF) - E10-10 (+B2)
      Table 5. Adjusting Ring*

      Tester Connection

      Condition

      Specified Condition

      E10-6 (VR2) - E10-7 (VR1)

      P1

      209 to 231 Ω

      P2

      114 to 126 Ω

      P3

      58.9 to 65.1 Ω

      P4

      Below 1 Ω
      Tip:

      *: 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

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

    1. Disconnect the E95 windshield wiper relay assembly connector.

    2. Disconnect the A11 windshield wiper motor assembly connector.

    3. Disconnect the A17 windshield washer motor and pump assembly connector.

    4. Disconnect the 3D instrument panel junction block assembly connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E9-4 (EW) - Body ground

      Always

      Below 1 Ω

      E9-7 (WF) - E95-4 (W) - A17-2

      Always

      Below 1 Ω

      E9-7 (WF) - Body ground

      Always

      10 kΩ or higher

      E10-1 (+S) - E95-10 (+1)

      Always

      Below 1 Ω

      E10-1 (+S) - Body ground

      Always

      10 kΩ or higher

      E10-2 (+B) - 3D-3

      Always

      Below 1 Ω

      E10-2 (+B) - Body ground

      Always

      10 kΩ or higher

      E10-3 (+1) - A11-5 (+1)

      *1

      Always

      Below 1 Ω

      E10-3 (+1) - A11-1 (+1)

      *2

      Always

      Below 1 Ω

      E10-3 (+1) - Body ground

      Always

      10 kΩ or higher

      E10-4 (+2) - E95-11 (+2) - A11-3 (+2) - 3D-7

      *1

      Always

      Below 1 Ω

      E10-4 (+2) - E95-11 (+2) - A11-4 (+2) - 3D-7

      *2

      Always

      Below 1 Ω

      E10-4 (+2) - Body ground

      Always

      10 kΩ or higher

      E10-6 (VR2) - E95-8 (VR2)

      Always

      Below 1 Ω

      E10-6 (VR2) - Body ground

      Always

      10 kΩ or higher

      E10-7 (VR1) - E95-21 (VR1)

      Always

      Below 1 Ω

      E10-7 (VR1) - Body ground

      Always

      10 kΩ or higher

      E10-8 (AUTO) - E95-3 (C1)

      Always

      Below 1 Ω

      E10-8 (AUTO) - Body ground

      Always

      10 kΩ or higher

      E10-9 (E) - E95-5 (CO)

      Always

      Below 1 Ω

      E10-9 (E) - Body ground

      Always

      10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR