WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. WINDSHIELD WIPER RELAY ASSEMBLY (w/ Rain Sensor)


    1. B006LMHN30

      Disconnect the G13 windshield wiper relay assembly connector.

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G13-2 (IG) - Body ground GR - Body ground IG Power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      G13-8 (VR2) - G13-21 (VR1) L - P Adjusting volume circuit Windshield wiper switch assembly adjusting ring changed 0 to 231 Ω
      G13-12 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      G13-16 (WIG) - Body ground Y - Body ground Battery power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    3. Reconnect the G13 windshield wiper relay assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G13-1 (+SM) - Body ground P - Body ground Front wiper motor operation signal Engine switch on (IG), front wiper motor not operating Below 1 V
      Engine switch on (IG), front wiper motor in low or high operating 11 to 14 V
      G13-3 (C1) - G13-5 (CO) V - B Front wiper switch AUTO position signal Engine switch on (IG), windshield wiper switch assembly in AUTO position Below 1 V
      Engine switch on (IG), windshield wiper switch assembly not in AUTO position 11 to 14 V
      G13-10 (+1) - Body ground LG - Body ground Front wiper motor low speed signal Engine switch on (IG), front wiper motor not operating Below 1 V
      Engine switch on (IG), front wiper motor in low operating 11 to 14 V
      G13-11 (+2) - Body ground R - Body ground Front wiper motor high speed signal Engine switch on (IG), front wiper motor not operating Below 1 V
      Engine switch on (IG), front wiper motor in high operating 11 to 14 V
      G13-25 (W) - Body ground G - Body ground Front washer motor signal Engine switch on (IG), windshield wiper switch assembly (front washer switch) off 11 to 14 V
      Engine switch on (IG), windshield wiper switch assembly (front washer switch) on Below 1 V

    5. Measure the voltage and waveform according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G13-14 (MPX1) - Body ground GR - Body ground LIN communication signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      G13-24 (SPD) - Body ground SB - Body ground Vehicle speed signal Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform 1)

      1. B006OXBE01

        Waveform 1 (Reference):

        Item Condition
        Tester Connection G13-24 (SPD) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Driving at approximately 20 km/h (12 mph)

        Tech Tips

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by A in the illustration narrows.

  2. COMBINATION METER ASSEMBLY

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