AUTOMATIC HIGH BEAM SYSTEM TERMINALS OF ECU


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

    A002LJVE02
    A002QU4E02

    1. Disconnect the DB, DE, DF 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
      DH-12 (BECU) - Body ground B - Body ground Battery power supply Always 11 to 14 V
      DF-5 (ACC) - Body ground W - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 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

    3. Reconnect the DB, DE, DF and H80 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
      DJ-4 (HU) - DE-28 (GND1) P - W-B Dimmer switch high signal input Dimmer switch in high Below 1 V
      Dimmer switch in low 11 to 14 V
      H80-12 (DIM) - DE-28 (GND1) LG - W-B Dimmer relay drive output Dimmer switch in high or high flash Below 1 V
      Dimmer switch not in high or high flash 11 to 14 V
      H80-15 (CLTS) - DE-28 (GND1)*1 G - W-B Automatic light control sensor signal input Ignition switch ON Below 1 V
      With the ignition switch ON and the light control switch in the AUTO position, cover the top of the automatic light control sensor with a lightproof object, and then expose the sensor

      Pulse generation

      (See waveform 1)
      H80-15 (CLTS) - DE-28 (GND1)*2 V - W-B Rain sensor (automatic light control) signal input Ignition switch on Below 1 V
      With the ignition switch ON and the light control switch in the AUTO position, cover the top of the rain sensor (automatic light control) with a lightproof object, and then expose the sensor

      Pulse generation

      (See waveform 1)
      H81-12 (HEAD) - DE-28 (GND1) L - W-B Light control switch head signal input Light control switch in head Below 1 V
      Light control switch not in head 11 to 14 V
      H81-18 (A) - DE-28 (GND1) V - W-B Light control switch AUTO signal input Light control switch in AUTO Below 1 V
      Light control switch not in AUTO 11 to 14 V
      H81-15 (CANH) - Body ground P - Body ground CAN communication line Ignition switch ON Pulse generation
      H81-16 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation

      • *1: w/o Rain Sensor

      • *2: w/ Rain Sensor


      1. A002QL9E01

        Waveform 1

        Item Content
        Terminal No. (Symbol) H80-15 (CLTS) - DE-28 (GND1)
        Tool setting 5 V/DIV., 5 ms./DIV.
        Condition

        • w/o Rain Sensor


          • Ignition switch ON

          • Headlight dimmer switch AUTO

          • Automatic light control sensor covered with a hand → Rain sensor exposed to ambient light


        • w/ Rain Sensor


          • Ignition switch ON

          • Headlight dimmer switch AUTO

          • Rain sensor covered with a hand → Rain sensor exposed to ambient light

  2. PRE-COLLISION CITY SENSOR Click here