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

  1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY

    U123636E02

    1. Disconnect the H56 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

      H56-25 (W) - Body ground

      W - Body ground

      Front washer switch signal

      Front washer switch on

      Below 1 Ω

      Front washer switch off

      10 kΩ or higher

      H56-8 (VR2) - H56-21 (VR1)

      Y - G

      Adjusting ring signal

      Windshield wiper switch adjusting ring* changed from (+) side to (-) side

      Below 10 to 2700 Ω

      H56-2 (IG) - Body ground

      L - Body ground

      Power source

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V

      H56-12 (E) - Body ground

      BR - Body ground

      Ground

      Always

      Below 1 Ω
      Tip:

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

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

    3. Reconnect the H56 relay connector.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H56-10 (+1) - Body ground

      G - Body ground

      Front wiper motor LO speed signal

      Front wiper motor in LO operation

      11 to 14 V

      Front wiper motor off

      Below 1 V

      H56-11 (+2) - Body ground

      GR - Body ground

      Front wiper motor HI speed signal

      Front wiper motor in HI operation

      11 to 14 V

      Front wiper motor off

      Below 1 V

      H56-25 (W) - Body ground

      W - Body ground

      Front washer motor signal

      Front washer switch on

      Below 1 V

      Front washer switch off

      11 to 14 V

      H56-1 (+SM) - Body ground

      G - Body ground

      Front wiper motor operation signal

      Front wiper motor in LO or HI operation

      11 to 14 V

      Front wiper motor off

      Below 1 V

      H56-3 (C1) - H56-15 (CO)

      BE - L

      IG signal

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V

      H56-13 (SIG) - H56-7 (ES)

      P - LG

      Power source

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V

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

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

    U123777E02
    U123716E02

    1. Disconnect the DB, DE, DF, DG and H80 ECU connectors.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      DB-30 (BECU) - Body ground

      W - Body ground

      ECU power supply (from battery)

      Always

      11 to 14 V

      DG-1 (IG) - Body ground

      W - Body ground

      IG signal

      Ignition switch off

      Below 1 V

      Ignition switch ON

      11 to 14 V

      DF-5 (ACC) - Body ground

      W - Body ground

      ACC signal

      Ignition switch off

      Below 1 V

      Ignition switch ACC

      11 to 14 V

      DE-28 (GND1) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      H80-4 (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 DB, DE, DF, DG and H80 ECU connectors.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H81-19 (HDLO) - Body ground*1, *2

      G - Body ground

      Low beam headlight operation signal

      Low beam headlights not operating

      Below 1 V

      Low beam headlights operating

      11 to 14 V

      H79-20 (HRLY) - Body ground*2

      B - Body ground

      Headlight cleaner switch operation signal

      Headlight cleaner switch off

      11 to 14 V

      Headlight cleaner switch on

      Below 1 V

      • *1: for HID Headlight

      • *2: w/ Headlight Cleaner System

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

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

    U123736E02

    1. Disconnect the A67 relay connector.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A67-3 (IG) - Body ground

      G - Body ground

      IG signal

      Ignition switch off

      Below 1 V

      Ignition switch ON

      11 to 14 V

      A67-4 (E) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      A67-1 (HDLO) - Body ground*

      SB - Body ground

      Low beam headlight operation signal

      Low beam headlights not operating

      Below 1 V

      Low beam headlights operating

      11 to 14 V

      A67-2 (H) - Body ground

      R - Body ground

      Headlight cleaner switch operation signal

      Headlight cleaner switch on

      11 to 14 V

      Headlight cleaner switch off

      Below 1 V

      A67-6 (PB) - Body ground

      B - Body ground

      Headlight cleaner motor signal

      Always

      11 to 14 V

      A67-5 (FRWA) - Body ground*

      W - Body ground

      Front washer motor operation signal

      Front washer switch off

      11 to 14 V

      Front washer switch on

      Below 1 V

      • *: for HID Headlight

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