PARKING SUPPORT ALERT SYSTEM TERMINALS OF ECU


  1. CLEARANCE WARNING ECU ASSEMBLY

    B006H1IE38

    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 Engine switch off Below 1 V
      Engine switch on (IG) 10.5 to 16 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

      • Engine switch on (IG)

      • Parking support alert 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)

      • Engine running

      • Parking support alert system on

      • Shift position in any position other than P or R

      • 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 No. 1 clearance warning buzzer signal Buzzer sounding

      Pulse generation

      (Refer to waveform 2)
      L18-15 (BBZ) - L18-16 (ER) L - R No. 2 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

      • Engine switch on (IG)

      • Parking support alert 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)

      • Engine running

      • Parking support alert system on

      • Shift position in R

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

      Pulse generation

      (Refer to waveform 1)
      L18-28 (STP) - L18-30 (E)*1 R - W-B Reverse signal

      • Engine running

      • Shift position not in R

      		 Below 3 V

      • Engine running

      • Shift position in R

      		 8 V or higher
      L18-31 (IND) - L18-30 (E)*1 B - W-B Reverse signal

      • Engine running

      • Shift position not in R

      		 8 V or higher

      • Engine running

      • Shift position in R

      		 Below 3 V

      • *1: w/ Parking Assist Monitor System

    5. Using an oscilloscope, check waveform 1.


      1. B006CG2N04

        Waveform 1 (Reference)

        Item Content
        Measurement terminal

        • CH1: L18-8 (SOF) - L18-30 (E)

        • CH2: L18-24 (SOR) - L18-30 (E)
        Measurement setting 5 V/DIV., 1 ms./DIV.
        Condition

        • Engine running

        • Parking support alert system on

        • Shift position in any position other than P or R (CH1)

        • Shift position in R (CH2)

        • Vehicle speed is less than approximately 10 km/h (6 mph) (CH1)

        Tech Tips

        The waveforms for CH1 and CH2 are same.

    6. Using an oscilloscope, check waveform 2.


      1. B006D18N05

        Waveform 2 (Reference)

        Item Content
        Measurement terminal

        L18-14 (CBZ) - L18-13 (EF)

        L18-15 (BBZ) - L18-16 (ER)
        Measurement setting 2 V/DIV., 500 μs./DIV.
        Condition Buzzer sounding

        Tech Tips

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

  2. BLIND SPOT MONITOR SENSOR RH (w/ Blind Spot Monitor System)

    Click here

  3. BLIND SPOT MONITOR SENSOR LH (w/ Blind Spot Monitor System)

    Click here

  4. REAR TELEVISION CAMERA ASSEMBLY (w/ Blind Spot Monitor System and w/ Panoramic View Monitor System)

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