WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER MOTOR ASSEMBLY

    B006YHON03

    1. Disconnect the A31 windshield wiper motor assembly connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      for LHD

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A31-4 (+B) - Body ground SB - Body ground Ignition switch ON signal (Power source circuit) Ignition switch ON 11 to 14 V
      Less than approximately 60 seconds after ignition switch turned off
      Approximately 60 seconds after ignition switch turned off Below 1 V
      A31-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A31-1 (+B) - Body ground SB - Body ground Ignition switch ON signal (Power source circuit) Ignition switch ON 11 to 14 V
      Less than approximately 60 seconds after ignition switch turned off
      Approximately 60 seconds after ignition switch turned off Below 1 V
      A31-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Connect the A31 windshield wiper motor assembly connector.

      Tech Tips

      Since the A31 windshield wiper motor assembly connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

      for LHD

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A31-3 (2S) - Body ground B - Body ground Windshield wiper motor assembly HI operation signal Windshield wiper motor assembly stopped 11 to 14 V
      Windshield wiper motor assembly operating in HI Below 1 V
      A31-2 (LIN) - Body ground R - Body ground LIN communication signal Ignition switch ON Pulse generation
      for RHD

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A31-2 (2S) - Body ground B - Body ground Windshield wiper motor assembly HI operation signal Windshield wiper motor assembly stopped 11 to 14 V
      Windshield wiper motor assembly operating in HI Below 1 V
      A31-3 (LIN) - Body ground R - Body ground LIN communication signal Ignition switch ON Pulse generation

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

    B0070ETC06
    *A for LHD *B for RHD

    1. Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

    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
      3B-3 - Body ground LA - Body ground Ground Always Below 1 Ω
      3B-23 - Body ground*1 BE - Body ground Battery power supply Always 11 to 14 V
      3C-1 - Body ground*2 LG - Body ground Battery power supply Always 11 to 14 V
      3F-1 - Body ground*3 W - Body ground Battery power supply Always 11 to 14 V
      3G-1 - Body ground*4 W - Body ground Battery power supply Always 11 to 14 V

      • *1: w/ Door Control Battery

      • *2: w/o Door Control Battery

      • *3: for LHD

      • *4: for RHD

    3. Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

    4. 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
      3C-2 - Body ground R - Body ground Washer circuit IG power source Ignition switch ON 11 to 14 V
      K51-3 (LIN3) - Body ground R - Body ground LIN communication line Ignition switch ON Pulse generation
      K51-12 (FWSR) - Body ground L - Body ground WASHER Relay operation signal Ignition switch ON, front washer switch off 11 to 14 V
      Ignition switch ON, front washer switch on Below 2 V
      K52-21 (WPS) - Body ground LG - Body ground WIPER Relay operation signal Ignition switch ON 11 to 14 V
      Less than approximately 60 seconds after ignition switch turned off
      Approximately 60 seconds after ignition switch turned off Below 1 V

  3. CHECK RAIN SENSOR

    B006ZK5C01
    *A for LHD *B for RHD

    1. Disconnect the V4*1 or V5*2 rain sensor connector.


      • *1: for LHD

      • *2: for RHD

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

      for LHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V4-2 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      V4-3 (MPX) - Body ground GR - Body ground LIN communication signal Ignition switch ON Pulse generation
      V4-4 (SIG) - Body ground B - Body ground IG power source circuit Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V5-2 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      V5-3 (MPX) - Body ground GR - Body ground LIN communication signal Ignition switch ON Pulse generation
      V5-4 (SIG) - Body ground B - Body ground IG power source circuit Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V

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

    B006YZ5N04

    1. Disconnect the A9 headlight cleaner control relay connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A9-3 (IG) - Body ground B - Body ground IG power source circuit Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      A9-4 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A9-6 (PB) - Body ground R - Body ground Headlight cleaner motor operation signal Always 11 to 14 V

  5. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH (w/ Headlight Cleaner System)

    for Bulb Type Turn Signal Light: Click here

    for LED Type Turn Signal Light: Click here

  6. CHECK COMBINATION METER ASSEMBLY

    Click here