WIPER AND WASHER SYSTEM(w/ Rain Sensor) Rain Sensor Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01QTIWE01

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 G85 windshield wiper relay assembly connector.

    2. Disconnect the Q5*1 or Q10*2 rain sensor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G85-14 (MPX1) - Q5-1 (MPX) Always Below 1 Ω
      G85-14 (MPX1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      G85-14 (MPX1) - Q10-1 (MPX) Always Below 1 Ω
      G85-14 (MPX1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01QR46C01
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Rain Sensor)

      Disconnect the rain sensor connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      Q5-2 (ES) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      O10-2 (ES) - Body ground Always Below 1 Ω

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      Q5-4 (SIG) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      Q10-4 (SIG) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK RAIN SENSOR


    1. A01QPPNC03
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Rain Sensor)

      Remove the rain sensor with the connector(s) still connected.

    2. Connect an oscilloscope to terminals 1 (MPX) and 2 (ES) of the rain sensor connector.

    3. Check the waveform of the rain sensor using the oscilloscope.

      OK
      for LHD
      Tester Connection Switch Condition Specified Condition
      O5-1 (MPX) - O5-2 (ES) Ignition switch ON Pulse generation
      for RHD
      Tester Connection Switch Condition Specified Condition
      O10-1 (MPX) - O10-2 (ES) Ignition switch ON Pulse generation
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE RAIN SENSOR Click here