WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK FRONT CONTROLLER

    A000X0UE04

    1. Disconnect the A50 and A52 ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A52-1 (BATB) - A50-2 (E) P - W-B Power source Always 11 to 14 V
      A52-5 (ALTB) - A50-2 (E) L - W-B Power source Always 11 to 14 V
      A50-1 (FMB3) - A50-2 (E) LG - W-B Power source Always 11 to 14 V
      A50-2 (E) - Body ground W-B - Body ground Power ground Always Below 1 Ω
      A50-5 (FMIG) - A50-2 (E) Y - W-B Power source Power switch ON (IG) 11 to 14 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the A50 and A52 ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A51-1 (S/M) - Body ground B - Body ground Front wiper motor operation signal Front wiper is operated 10 to 14 V
      Front wiper is stopped Below 1 V
      A51-2 (WIG) - Body ground L - Body ground Front wiper motor power source circuit Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      A51-8 (S/S) - Body ground P - Body ground Front wiper motor power supply circuit Front wiper switch off Below 1 V
      Front wiper switch low 11 to 14 V
      A51-9 (+2) - Body ground L - Body ground Front wiper motor power supply circuit (HI signal) Front wiper switch off Below 1 V
      Front wiper switch hi 11 to 14 V
      A51-14 (2S) - Body ground R - Body ground Front wiper switch HI signal (to combination switch) Front wiper switch off Below 1 V
      Front wiper switch hi 11 to 14 V
      A51-17 (W+) - Body ground B - Body ground Power source circuit (from battery) Always 11 to 14 V

      If the result is not as specified, the ECU may have a malfunction.

  2. CHECK WINDSHIELD WIPER SWITCH

    A000XV8E03

    1. Disconnect the L25 switch connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L25-1 (B) - L25-8 (E) B - W-B Power source circuit (from battery) Always 11 to 14 V
      L25-2 (IG) - L25-8 (E) G - W-B IG signal circuit Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      L25-3 (2S) - Body ground R - Body ground Wiper switch HI signal Front wiper switch off Below 1 V
      Front wiper switch hi 11 to 14 V
      L25-8 (E) - Body ground W-B - Body ground Ground circuit Always Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

  3. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

    A000UY5E03

    1. Disconnect the L11, L13, DF and DH main body ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L13-6 (AM1) - L11-1 (GND3) GR - W-B ECU power supply (from battery) Always 11 to 14 V
      DF-1 (IG) - L11-1 (GND3) GR - W-B IG signal circuit Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      DH-15 (STP) - L11-1 (GND3) L - W-B Stop light switch circuit Stop light switch OFF Below 1 V
      Stop light switch ON 11 to 14 V
      L11-1 (GND3) - Body ground W-B Body ground Ground circuit Always Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

  4. CHECK MAP LIGHT

    A000XLDE03

    1. Disconnect the X4 and X6 map light connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      X4-6 (+B) - Body ground B - Body ground ECU power supply (from battery) Always 11 to 14 V
      X4-9 (IG) - Body ground L - Body ground IG signal circuit Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      X6-19 (GND2) - Body ground B - Body ground Ground circuit Always Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

  5. CHECK RAIN SENSOR

    A000W2EE04

    1. Disconnect the X8 rain sensor connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      X8-4 (SIG) - Body ground LG - Body ground IG signal circuit (to IG relay) Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      X8-1 (ES) - Body ground BR - Body ground Ground circuit Always Below 1 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

  6. CHECK HEADLIGHT CLEANER CONTROL RELAY

    A000VWQE03

    1. Disconnect the A6 relay connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A6-3 (IG) - A6-4 (E) Y - W-B IG signal circuit (to IG relay) Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      A6-6 (PB) - A6-4 (E) R-B - W-B Headlight cleaner motor operation signal Headlight cleaner motor is stopped Below 1 V
      Headlight cleaner motor is operating 11 to 14 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the A6 relay connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A6-1 ((HDLO) - A6-4 (E) L - W-B Daytime running light system operation signal Daytime running light is not operating Below 1 V
      Daytime running light is operating 11 to 14 V
      A6-2 (H) - A6-4 (E) B - W-B Headlight cleaner switch operation signal Headlight cleaner switch is OFF Below 1 V
      Headlight cleaner switch is ON 11 to 14 V
      A6-5 (FRWA) - A6-4 (E) R - W-B Front washer motor operation signal Front washer switch is OFF Below 1 V
      Front washer switch is ON 11 to 14 V

      If the result is not as specified, the relay may have a malfunction.