AUTOMATIC HIGH BEAM SYSTEM TERMINALS OF ECU


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

    A0056LAE02
    A0055CKE02

    1. Disconnect the DB, DE and D80 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
      DB-12 (BECU) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      DE-17 (GND1) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      D80-4 (GND2) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the DB, DE and D80 main body 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
      D80-12 (DIM) - DE-17 (GND1) LG - W-B Dimmer relay drive output Dimmer switch in high or high flash position Below 1 V
      Dimmer switch not in high or high flash position 11 to 14 V
      D80-15 (CLTS) - DE-17 (GND1) 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 (waveform varies depending on light volume) (Waveform 1)
      D81-18 (A) - DE-17 (GND1) V - W-B Light control switch AUTO position signal input Light control switch in AUTO position Below 1 V
      Light control switch not in AUTO position 11 to 14 V
      DJ-4 (HU) - DE-17 (GND1) P - W-B Dimmer switch high position signal input Dimmer switch in high or high flash position Below 1 V
      Dimmer switch in low position 11 to 14 V
      D81-15 (CANH) - Body ground R - Body ground CAN communication line Ignition switch ON Pulse generation
      D81-16 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation

      1. A00565GE11

        Waveform 1

        Item Content
        Terminal No. (Symbol) D80-15 (CLTS) - DE-17 (GND1)
        Tool setting 5 V/DIV., 5 ms/DIV.
        Condition 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

        Tech Tips

        The brighter the surrounding area, the narrower width A becomes.

  2. PRE-CRASH SAFETY CITY SENSOR Click here