WIPER AND WASHER SYSTEM Rain Sensor Circuit

DESCRIPTION

The windshield wiper relay assembly receives a signal from the rain sensor to control the auto wiper system.

WIRING DIAGRAM

A0006T8E01

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 RELAY ASSEMBLY - RAIN SENSOR)


    1. Disconnect the H51 windshield wiper relay assembly connector.

    2. Disconnect the T1 rain sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H51-14 (MPX1) - T1-1 (MPX1) Always Below 1 Ω
      T1-1 (MPX1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (ROOF CONSOLE BOX ASSEMBLY - IG CIRCUIT AND BODY GROUND)


    1. Disconnect the T10 roof console box assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      T10-1 (IG) - T10-21 (GND2) Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - AUXILIARY BATTERY AND BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T1-2 (ES) - T10-21 (GND2) Always Below 1 Ω
      T1-4 (SIG) - T10-14 (IG2) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT ROOF CONSOLE BOX ASSEMBLY


    1. Reconnect the T10 roof console box assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      T1-4 (SIG) - T1-2 (ES) Power switch on (IG) 11 to 14 V

    NG

    REPLACE ROOF CONSOLE BOX ASSEMBLY Click here

    OK

  5. INSPECT RAIN SENSOR


    1. A0009PNE02
      Text in Illustration
      *a

      Component with harness connected

      (Rain Sensor)

      Reconnect the T1 rain sensor connector.

    2. Connect an oscilloscope to the rain sensor connector.

    3. Check for pulses.

      OK
      Tester Connection Condition Specified Condition
      T1-1 (MPX1) - T1-2 (ES) Power switch on (IG) Pulse generation

    OK

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

    NG

    REPLACE RAIN SENSOR Click here