WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER MOTOR ASSEMBLY


    1. Disconnect the i1 windshield wiper motor assembly connector.

      B007ZF4N02

    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
      i1-3 (L) - Body ground B - Body ground Engine switch on (IG) signal (Power source circuit) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      i1-4 (+S) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the i1 windshield wiper motor assembly connector.

    4. 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
      i1-1 (2S) - Body ground B - Body ground Windshield wiper motor assembly HI operation signal Windshield wiper motor assembly not operating 11 to 14 V
      Windshield wiper motor assembly operating in HI Below 1 V
      i1-2 (MPX1) - Body ground GR - Body ground LIN communication signal Engine switch on (IG) Pulse generation

    Tech Tips

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

  2. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH (for Triple Beam Headlight)


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

      B007XBSN09

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A50-7 (HLC) - Body ground B - Body ground Headlight cleaner motor and pump assembly operation signal Engine switch on (IG), headlight cleaner motor and pump assembly not operating 11 to 14 V
      Engine switch on (IG), headlight cleaner motor and pump assembly operating Below 1 V
      A50-18 (FRWA) - Body ground B - Body ground Front washer switch operation signal Engine switch on (IG), front washer switch off 11 to 14 V
      Engine switch on (IG), front washer switch on Below 1 V

      Tech Tips

      Since the A50 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

  3. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH (for Single Beam Headlight)


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

      B007WO7N08

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A50-7 (HLC) - Body ground B - Body ground Headlight cleaner motor and pump assembly operation signal Engine switch on (IG), headlight cleaner motor and pump assembly not operating 11 to 14 V
      Engine switch on (IG), headlight cleaner motor and pump assembly operating Below 1 V
      A50-18 (FRWA) - Body ground B - Body ground Front washer switch operation signal Engine switch on (IG), front washer switch off 11 to 14 V
      Engine switch on (IG), front washer switch on Below 1 V

      Tech Tips

      Since the A50 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage cannot be measured and pulses cannot be checked for directly. The values listed are for reference only.