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


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

    A01X4IG

    Tech Tips

    The headlight cleaner control relay uses waterproof connector. Therefore, voltage 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 signal circuit Ignition switch off Below 1 V
    Ignition switch ON 11 to 14 V
    4 (E) - Body ground - Ground circuit 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

    Ignition switch ON

    Headlight cleaner switch is off

    		 Below 1 V

    Ignition switch ON

    Headlight switch is off

    		 Below 1 V

    Ignition switch ON

    Headlight cleaner switch is on and headlight dimmer switch in HEAD

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

    Ignition switch ON

    Front washer switch is off

    		 11 to 14 V

    Ignition switch ON

    Front washer switch is on

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

    Ignition switch ON

    Headlight dimmer switch in HEAD

    		 11 to 14 V

    Ignition switch ON

    Headlight dimmer switch not in HEAD

    		 Below 1 V

    • *: w/ Headlight Auto Leveling

  2. NO. 2 MULTIPLEX NETWORK BODY ECU (w/ Washer Nozzle Heater System)

    A01X6M0E03

    1. Disconnect the L50 and L51 No. 2 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
      L50-14 (BECU) - Body ground R - Body ground Power source circuit Always 11 to 14 V
      L50-13 (SIG) - Body ground G - Body ground IG signal circuit Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      L50-7 (GND) - Body ground W-B - Body ground Ground circuit Always Below 1 Ω

    3. Reconnect the L50 and L51 No. 2 multiplex network body 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
      L50-25 (WHTR) - Body ground GR - Body ground Washer nozzle heater signal circuit Ignition switch ON, ambient temperature 6°C (42°F) or higher 11 to 14 V
      Ignition switch ON, ambient temperature 5°C (41°F) or less Below 1 V