PARKING SUPPORT BRAKE SYSTEM TERMINALS OF ECU


  1. CLEARANCE WARNING ECU ASSEMBLY

    B004Y99E37

    1. Disconnect the L18 clearance warning ECU assembly connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L18-1 (IG) - L18-30 (E) R - W-B IG power source signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      L18-30 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the L18 clearance warning ECU assembly connector.

    4. 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
      L18-4 (BOF) - L18-30 (E) R - W-B Power source for front sensor circuit

      • Power switch on (IG)

      • Parking support brake system on

      		 11 to 14 V
      L18-6 (E5) - L18-30 (E) G - W-B Ground for front clearance sonar Always Below 1 Ω
      L18-8 (SOF) - L18-30 (E) W - W-B Front sensor communication signal (Front clearance sonar sensor)

      • Power switch on (IG)

      • Parking support brake system on

      • Shift lever in any position other than P

      • Vehicle speed is less than approximately 10 km/h (6 mph)

      Pulse generation

      (Refer to waveform 1)
      L18-14 (CBZ) - L18-13 (EF) LG - L Clearance warning buzzer signal Buzzer sounding

      Pulse generation

      (Refer to waveform 2)
      L18-22 (BOR) - L18-30 (E) GR - W-B Power source for rear sensor circuit

      • Power switch on (IG)

      • Parking support brake system on

      		 11 to 14 V
      L18-23 (E1) - L18-30 (E) W - W-B Ground for rear clearance sonar Always Below 1 Ω
      L18-24 (SOR) - L18-30 (E) P - W-B Rear sensor communication signal (Rear clearance sonar sensor)

      • Power switch on (IG)

      • Parking support brake system on

      • Shift lever in R

      Pulse generation

      (Refer to waveform )

    5. Using an oscilloscope, check waveform 1.


      1. B004XF4N08

        Waveform 1 (Reference)

        Item Content
        Measurement terminal L18-8 (SOF) - L18-30 (E)
        Measurement setting 5 V/DIV., 1 ms./DIV.
        Condition

        • Power switch on (IG)

        • Parking support brake system on

        • Shift lever in any position other than P or R

        • Vehicle speed is less than approximately 10 km/h (6 mph)

    6. Using an oscilloscope, check waveform 2.


      1. B004T8TN05

        Waveform 2 (Reference)

        Item Content
        Measurement terminal L18-14 (CBZ) - L18-13 (EF)
        Measurement setting 2 V/DIV., 500 μs./DIV.
        Condition Buzzer sounding

        Tech Tips

        The amplitude of the waveform changes according to the set volume.

    7. Using an oscilloscope, check waveform 3.


      1. B004XF4N08

        Waveform 3 (Reference)

        Item Content
        Measurement terminal L18-24 (SOR) - L18-30 (E)
        Measurement setting 5 V/DIV., 1 ms./DIV.
        Condition

        • Power switch on (IG)

        • Parking support brake system on

        • Shift lever in R

  2. HYBRID VEHICLE CONTROL ECU ASSEMBLY

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  3. COMBINATION METER ASSEMBLY

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  4. BLIND SPOT MONITOR SENSOR RH

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  5. BLIND SPOT MONITOR SENSOR LH

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  6. REAR TELEVISION CAMERA ASSEMBLY

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