WIPER AND WASHER SYSTEM(w/ Rain Sensor) TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY

    A01V7TCE03

    1. Disconnect the G85 windshield wiper relay assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G85-2 (IG) - Body ground L - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      G85-25 (W) - Body ground SB - Body ground Front washer switch circuit Front washer switch on Below 1 Ω
      Front washer switch off 10 kΩ or higher
      G85-8 (VR2) - G85-21(VR1) Y - W Adjusting volume circuit Windshield wiper switch adjusting ring* changed 0 to 231 Ω
      G85-12 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω

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

    3. Reconnect the G85 windshield wiper relay assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G85-10 (+1) - Body ground G - Body ground Front wiper motor low speed signal circuit Front wiper motor off Below 1 Ω

    5. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G85-1 (+SM) - Body ground G - Body ground Front wiper motor position detection signal Front wiper motor in low or high operation Below 1 V ←→ 11 to 14 V
      Front wiper motor off Below 1 V
      G85-3 (C1) - G85-5 (C0) GR - L Windshield wiper switch assembly AUTO signal circuit Ignition switch ON, windshield wiper switch assembly in AUTO Below 1 V
      Ignition switch ON, front wiper switch off 11 to 14 V
      G85-25 (W) - Body ground SB - Body ground Front washer switch circuit Ignition switch ON, front washer switch on Below 1 V
      Ignition switch ON, front washer switch off 11 to 14 V
      G85-10 (+1) - Body ground G - Body ground Front wiper motor low speed signal circuit Front wiper motor in low operation 11 to 14 V
      G85-11 (+2) - Body ground R - Body ground Front wiper motor high speed signal circuit Front wiper motor in high operation 11 to 14 V
      Front wiper motor off Below 1 V
      G85-14 (MPX1) - Body ground V - Body ground Rain sensor signal Ignition switch ON Pulse generation
      G85-24 (SPD) - Body ground B - Body ground Speed signal Ignition switch ON, wheel being rotated

      Pulse generation

      (See waveform 1)

      1. A01V84FN02

        Waveform 1 (Reference):

        Item Condition
        Terminal No. (Symbol) G85-24 (SPD) - Body ground
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Ignition switch ON, wheel being rotated

        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. CHECK HEADLIGHT CLEANER CONTROL RELAY (w/ Headlight Cleaner System)

    A01V9K0E03

    1. Disconnect the A48 headlight cleaner control relay connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A48-1 (HDLO) - Body ground BR - Body ground Low beam headlight operation signal Low beam headlights not operating 11 to 14 V
      Low beam headlights operating Below 1 V
      A48-3 (IG) - A48-4 (E) L - W-B IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      A48-4 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      A48-6 (PB) - A48-4 (E) B - W-B Headlight cleaner motor operation signal Ignition switch off 11 to 14 V

    3. Reconnect the A48 headlight cleaner control relay connector.

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

      Tech Tips

      The standard normal voltage between each pair of the headlight cleaner control relay terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of the terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the headlight cleaner control relay terminal locations.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A48-5 (FRWA) - A48-4 (E) W - W-B Front washer switch signal Ignition switch ON, front washer switch off 11 to 14 V
      Ignition switch ON, front washer switch on Below 1 V

  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    A01VAOXE03
    A01V8PBC03
    *A Main Body ECU (Multiplex Network Body ECU) with 1 Connector *B Main Body ECU (Multiplex Network Body ECU) with 3 Connectors
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU).

      for LHD: Click here

      for RHD: Click here

    2. Connect the instrument panel junction block assembly connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-30 (BECU) -Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-29 (ACC) -Body ground None - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      A-32 (IG) - Body ground None - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      A-11 (GND1) - Body ground None - Body ground Body ground Always Below 1 Ω
      G79-20 (WHTR) - Body ground G - Body ground Washer nozzle heatersignal circuit Ignition switch ON, ambient temperature 6°C (42°F) or higher 11 to 14 V
      Ignition switch ON, ambient temperature 5°C (41°F) or less Below 1 Ω

    4. Install the main body ECU (multiplex network body ECU).

      for LHD: Click here

      for RHD: Click here

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3B-37 (HRLY) - Body ground BR - Body ground Low beam headlight signal Light control switch in head position Below 1 V
      Light control switch off 11 to 14 V