WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER ECU

    A01ER25E03

    1. Disconnect the E89 and E90 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
      E89-5 (IG1l) - E90-10 (E) G - W-B IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      E90-10 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the E89 and E90 ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E89-7 (+SM) - Body ground W - Body ground Front wiper motor operation signal

      Engine switch on (IG)

      Front wiper operated

      		 11 to 14 V

      Engine switch on (IG)

      Front wiper stopped

      		 Below 1 V
      E89-8 (WIG) - Body ground B - Body ground Front wiper motor power source circuit Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      E89-10 (1S) - Body ground L - Body ground Front wiper motor power supply circuit

      Engine switch on (IG)

      Front wiper switch off

      		 Below 1 V

      Engine switch on (IG)

      Front wiper switch LO

      		 11 to 14 V
      E89-9 (2S) - Body ground R - Body ground Front wiper motor power supply circuit (HI signal)

      Engine switch on (IG)

      Front wiper switch off

      		 Below 1 V

      Engine switch on (IG)

      Front wiper switch HI

      		 11 to 14 V
      E90-2 (W) - Body ground L - Body ground Front washer motor power source circuit

      Engine switch on (IG)

      Front washer switch off

      		 11 to 14 V

      Engine switch on (IG)

      Front washer switch on

      		 Below 1 V
      E90-7 (MPX1) - Body ground R - Body ground LIN communication line Engine switch on (IG) Pulse generation

  2. CHECK NO. 2 MAIN BODY ECU

    A01ERE5E02

    1. Disconnect the L33 ECU 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
      L33-14 (BECU) - L33-7 (GND) R - W-B Battery power source Always 11 to 14 V
      L33-13 (SIG) - L33-7 (GND) G - W-B IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      L33-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the L33 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L33-1 (RWSM) - Body ground G - Body ground Rear wiper motor operation signal Rear wiper operated 11 to 14 V
      Rear wiper stopped Below 1 V
      L33-4 (WRLO) - Body ground G - Body ground Rear wiper motor power supply circuit Rear wiper switch off Below 1 V
      Rear wiper switch HI 11 to 14 V
      L33-5 (WRSW) - Body ground B - Body ground Rear washer motor power source circuit Rear washer switch off Below 1 V
      Rear washer switch on 11 to 14 V
      L33-18 (WRIN) - Body ground R - Body ground Rear wiper motor power supply circuit Rear wiper switch off Below 1 V
      Rear wiper switch LO 11 to 14 V
      L33-25 (WHTR) - Body ground GR - Body ground Washer nozzle heater signal circuit Engine switch on (IG), ambient temperature 6°C (42°F) or higher 11 to 14 V
      Engine switch on (IG), ambient temperature 5°C (41°F) or less Below 1 V

  3. CHECK WINDSHIELD WIPER SWITCH

    A01EOSNE02

    1. Disconnect the E16 switch 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
      E16-2 (+B) - E16-10 (E)*1 P - W-B IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      E16-3 (+B) - E16-5 (E)*2 P - W-B IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      E16-10 (E) - Body ground*1 W-B - Body ground Ground Always Below 1 Ω
      E16-5 (E) - Body ground*2 W-B - Body ground Ground Always Below 1 Ω

      *1: for LHD

      *2: for RHD

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

  4. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    A01EOYJE03

    1. Disconnect the 2A, 2B, 2D and E1 main 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
      E1-6 (AM1) - 2D-62 (GND2) W - W-B Battery power source Always 11 to 14 V
      2A-1 (IG) - 2D-62 (GND2) B - W-B IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      2B-22 (STP) - 2D-62 (GND2) R - W-B Stop light switch signal Stop light switch off Below 1 V
      Stop light switch on 11 to 14 V
      2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the 2A, 2B, 2D and E1 main body ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E3-16 (CANP) - E3-15 (CANN) GR - R CAN communication line Engine switch on (IG) Pulse generation

  5. CHECK MAP LIGHT

    A01ENAPE02

    1. Disconnect the R7 and R12 map light 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
      R7-9 (IG) - R12-20 (GND5) G - W-B IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      R12-20 (GND5) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  6. CHECK RAIN SENSOR

    A01EOXWE05

    1. Disconnect the R11 rain sensor 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
      R11-4 (SIG) - Body ground G - Body ground IG power source Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      R11-1 (ES) - Body ground W - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the R11 rain sensor connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R11-3 (MPX) - Body ground R - Body ground LIN communication line Engine switch on (IG) Pulse generation

  7. CHECK HEADLIGHT CLEANER CONTROL RELAY

    A01EQMV

    Tech Tips

    The headlight cleaner control relay uses waterproof connector. Therefore, voltage and resistance cannot be checked with the connector connected to the vehicle.

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    3 (IG) - 4 (E) - IG power source Engine switch off Below 1 V
    Engine switch on (IG) 11 to 14 V
    4 (E) - Body ground - Ground Always Below 1 Ω
    6 (PB) - 4 (E) - Headlight cleaner motor operation signal Headlight cleaner motor is stopped 11 to 14 V
    Headlight cleaner motor is operating Below 1 V
    2 (H) - 4 (E) - Headlight cleaner switch and headlight switch operation signal

    Engine switch on (IG)

    Headlight cleaner switch is off

    		 Below 1 V

    Engine switch on (IG)

    Headlight switch is off

    		 Below 1 V

    Engine switch on (IG)

    Headlight cleaner switch is on and headlight dimmer switch in HEAD

    		 11 to 14 V
    5 (FRWA) - 4 (E)* - Front washer switch operation signal

    Engine switch on (IG)

    Front washer switch is off

    		 11 to 14 V

    Engine switch on (IG)

    Front washer switch is on

    		 Below 1 V
    1 (HDLO) - 4 (E)* - Headlight low beam operation signal

    Engine switch on (IG)

    Headlight dimmer switch in HEAD

    		 11 to 14 V

    Engine switch on (IG)

    Headlight dimmer switch not in HEAD

    		 Below 1 V

    • *: w/ Rear Fog light