FORWARD RECOGNITION CAMERA SYSTEM TERMINALS OF ECU


  1. CHECK FORWARD RECOGNITION CAMERA

    Note


    • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.

    • Do not apply excessive force to the Q4 forward recognition camera connector.


    1. Disconnect the Q4 forward recognition camera connector.

      B0027L1C03
      *a

      Front view of wire harness connector

      (to Forward Recognition Camera)

      		 - -

    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
      Q4-7 (IGB) - Q4-10 (GND) V - B Power source Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      Q4-10 (GND) - Body ground B - Body ground Ground Always Below 1 Ω

    3. Reconnect the Q4 forward recognition camera connector.

      B00266CC13
      *a

      Component with harness connected

      (Forward Recognition Camera)

      		 - -

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q4-1 (HTR) - Q4-10 (GND)* BR - B Pre-crash safety city heater Ignition switch ON, and the pre-crash safety city heater operating 0 to 1.5 V
      Ignition switch ON, and the pre-crash safety city heater not operating 11 to 14 V
      Q4-8 (BZ) - Q4-10 (GND) R - B Skid control buzzer Ignition switch ON, and the skid control buzzer operating 0 to 1.5 V
      Ignition switch ON, and the skid control buzzer not operating 11 to 14 V

      • *: w/ Pre-crash Safety City Heater

    5. Check for pulses according to the value(s) in the table below.

      Tech Tips

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the forward recognition camera is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q4-5 (CA1P) - Q4-10 (GND) B - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      Q4-11 (CA1N) - Q4-10 (GND) V - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)
      Q4-6 (CANH) - Q4-10 (GND) B - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      Q4-12 (CANL) - Q4-10 (GND) BR - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)

      1. B0027KGE11
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        Waveform 1

        Item Content
        Terminal Name

        Between Q4-5 (CA1P) and Q4-10 (GND)

        Between Q4-6 (CANH) and Q4-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON

        Tech Tips

        The waveform varies depending on the CAN communication signal.

      2. B00252JE14
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        Waveform 2

        Item Content
        Terminal Name

        Between Q4-11 (CA1N) and Q4-10 (GND)

        Between Q4-12 (CANL) and Q4-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON

        Tech Tips

        The waveform varies depending on the CAN communication signal.