AUTOMATIC HIGH BEAM SYSTEM TERMINALS OF ECU


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

    B008IJ6C13
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I48-1 (DIM) - Body ground L - Body ground High beam headlight drive output Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      I48-8 (A) - Body ground G - Body ground 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
      I47-23 (AHBI) - Body ground P - Body ground Combination switch assembly (automatic high beam main switch) signal input Combination switch assembly (automatic high beam main switch) on Below 1 V
      Combination switch assembly (automatic high beam main switch) off 11 to 14 V
      I48-24 (HU) - Body ground Y - Body ground Headlight dimmer switch high position signal input Headlight dimmer switch in high position Below 1 V
      Headlight dimmer switch not in high position 11 to 14 V
      I48-19 (CLTB) - I48-21 (CLTE) W - V Automatic light control sensor power supply output Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      I48-20 (CLTS) - Body ground P - Body ground Automatic light control sensor signal input Engine switch off Below 1 V
      Automatic light control system operating

      Pulse generation

      (See waveform 1)
    2. B0056ZRE04

      Waveform 1

      Item Content
      Terminal No. (Symbol) I48-20 (CLTS) - Body ground
      Tool Setting 2 V/DIV., 10 ms./DIV.
      Condition Automatic light control system operating

      Tech Tips

      The communication waveform changes according to the surrounding brightness.

  2. CHECK FORWARD RECOGNITION CAMERA

    Click here