ADAPTIVE HIGH BEAM SYSTEM TERMINALS OF ECU


  1. CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

    B0058SBN32

    1. Disconnect the A19 headlight ECU sub-assembly LH connector.

    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
      A19-4 (IG) - Body ground L - Body ground Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A19-13 (ECUB) - Body ground R - Body ground Power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A19-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the A19 headlight ECU sub-assembly LH connector.

      Tech Tips


      • Since the A19 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

      • Since the B headlight ECU sub-assembly LH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A19-6 (AZSW) - Body ground P - Body ground Combination switch assembly (adaptive high beam switch) signal Engine switch on (IG), combination switch assembly (adaptive high beam switch) off 11 to 14 V
      Engine switch on (IG), combination switch assembly (adaptive high beam switch) on Below 1 V

  2. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

    B0058SBN33

    1. Disconnect the A20 headlight ECU sub-assembly RH connector.

    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
      A20-4 (IG) - Body ground G - Body ground Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A20-13 (ECUB) - Body ground B - Body ground Power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A20-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

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  4. CHECK FORWARD RECOGNITION CAMERA

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  5. CHECK COMBINATION METER ASSEMBLY

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