INTELLIGENT PARKING ASSIST SYSTEM TERMINALS OF ECU


  1. PARKING ASSIST ECU

    B005YRRE02

    1. Disconnect the L64 parking assist ECU connector.

    2. Measure the voltage and resistance of each terminal of the wire harness side connector.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L64-1 (+B) - L64-4 (GND1) GR - W-B Power source signal Power switch off 11 to 14 V
      L64-4 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L64-8 (IG) - L64-4 (GND1) V - W-B IG power source signal Power switch on (IG) 11 to 14 V
      L64-9 (ACC) - L64-4 (GND1) P - W-B ACC power source signal Power switch on (ACC) 11 to 14 V
      L64-11 (TX+) - L64-10 (TX-) B - W AVC-LAN communication signal - -

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the L64 parking assist ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L65-1 (CSB3) - L64-4 (GND1) G - W-B Power source to ultrasonic sensor Power switch on (IG) 7.2 to 8.8 V
      L65-2 (CSG3) - L64-4 (GND1) P - W-B Ultrasonic sensor ground Always Below 1 Ω

      L65-8 (HO1) - L64-4 (GND1)

      *1

      		 SB - W-B Rear height control sensor signal output Power switch off Below 1 V
      Power switch on (IG) 0.5 to 5.25 V
      L65-9 (HI1) - L64-4 (GND1) L - W-B Rear height control sensor signal input Power switch off Below 1 V
      Power switch on (IG) 0.5 to 5.25 V
      L65-14 (CB+) - L64-4 (GND1) W - W-B Power source to rear television camera Power switch on (ACC) 5.5 to 7.05 V
      L65-15 (CV+) - L64-4 (GND1) R - W-B Display signal (NTSC) input

      Power switch on (IG)

      Reverse (R) selected

      Camera lens not covered, displaying an image

      Pulse generation

      (Refer to waveform 1)

      Power switch on (IG)

      Reverse (R) selected

      Camera lens covered, blacking out screen

      Pulse generation

      (Refer to waveform 2)
      L65-16 (NS+) - L64-4 (GND1) G - W-B Display signal (NTSC) output

      Power switch on (IG)

      Reverse (R) selected

      Camera lens not covered, displaying an image

      Pulse generation

      (Refer to waveform 3)

      Power switch on (IG)

      Reverse (R) selected

      Camera lens not covered, displaying an image

      Pulse generation

      (Refer to waveform 4)
      L65-17 (NS-) - L64-4 (GND1) R - W-B Display signal (NTSC) ground Always Below 1 V
      L65-18 (NSG) - L64-4 (GND1) Shield - W-B Display signal (NTSC) ground (shield) Always Below 1 V
      L65-19 (LIN3) GR Ultrasonic sensor signal input and output - -
      L65-26 (ISSW) - L64-4 (GND1) R - W-B Parking assist pre support signal input

      Power switch on (IG)

      Parking assist pre support switch assembly pushed in

      		 Below 1 V

      Power switch on (IG)

      Parking assist pre support switch assembly not pushed

      		 4.75 to 5.25 V

      L65-27 (HBL+) - L64-4 (GND1)

      *1

      		 P - W-B Rear height control sensor power supply Power switch off Below 1 V
      Power switch on (IG) 4.75 to 5.25 V

      L65-28 (HB+) - L64-4 (GND1)

      *1

      		 P - W-B Rear height control sensor power supply Power switch off Below 1 V
      Power switch on (IG) 4.75 to 5.25 V

      L65-29 (HGND) - Body ground

      *1

      		 Y - Body ground Rear height control sensor ground Always Below 1 Ω

      L65-30 (HBE+) - L64-4 (GND1)

      *2

      		 L - W-B Rear height control sensor power supply Power switch off Below 1 V
      Power switch on (IG) 4.75 to 5.25 V
      L65-31 (HG1) - Body ground Y - Body ground Rear height control sensor ground Always Below 1 Ω
      L65-37 (CGND) - L64-4 (GND1) Shield - W-B Rear television camera ground (shield) Always Below 1 V
      L65-38 (CV-) - L64-4 (GND1) B - W-B Rear television camera ground Always Below 1 V
      L65-39 (CANL) - L64-4 (GND1) L - W-B CAN communication signal - -
      L65-40 (CANH) - L64-4 (GND1) B - W-B CAN communication signal - -
      L136-1 (GVIF) GR Video signal (Digital) - -

      If the result is not as specified, the ECU may have a malfunction.

      *1: for LED headlight

      *2: for Halogen headlight

    5. Reference (Oscilloscope waveform):

      B005Z8AE01

      Tech Tips

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.


      1. Waveform 1 (camera lens is not covered, displaying an image)

        Item Content
        Measurement Terminal L65-15 (CV+) - L64-4 (GND1)
        Measurement Setting 200 mV/DIV., 50 μs./DIV.
        Condition Power switch on (IG), reverse (R) selected

        Tech Tips


        • The video waveform changes according to the image sent by the rear television camera assembly.

        • The video waveform is constantly output when the power switch is on (ACC).

      2. Waveform 2 (camera lens is covered, blacking out the screen)

        Item Content
        Measurement Terminal L65-15 (CV+) - L64-4 (GND1)
        Measurement Setting 200 mV/DIV., 50 μs./DIV.
        Condition Power switch on (IG), reverse (R) selected

        Tech Tips


        • The video waveform changes according to the image sent by the rear television camera assembly.

        • The video waveform is constantly output when the power switch is on (ACC).

        Text in Illustration
        *a Waveform 1 (camera lens not covered, displaying an image)
        *b Waveform 2 (camera lens covered, blacking out the screen)
        *c Synchronization Signal
        *d Video Waveform

    6. Reference (Oscilloscope waveform):

      B005Z8AE01

      Tech Tips

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.


      1. Waveform 3(camera lens is not covered, displaying an image)

        Item Content
        Measurement Terminal L65-16 (NS+) - L64-4 (GND1)
        Measurement Setting 200 mV/DIV., 50 μs./DIV.
        Condition Power switch on (IG), reverse (R) selected

        Tech Tips

        The video waveform changes according to the image sent by the rear television camera assembly.

      2. Waveform 4(camera lens is covered, blacking out the screen)

        Item Content
        Measurement Terminal L65-16 (NS+) - L64-4 (GND1)
        Measurement Setting 200 mV/DIV., 50 μs./DIV.
        Condition Power switch on (IG), reverse (R) selected

        Tech Tips

        The video waveform changes according to the image sent by the rear television camera assembly.

        Text in Illustration
        *a Waveform 3 (camera lens not covered, displaying an image)
        *b Waveform 4 (camera lens covered, blacking out the screen)
        *c Synchronization Signal
        *d Video Waveform

  2. REAR TELEVISION CAMERA ASSEMBLY

    B005XH4E02

    1. Disconnect the V14 rear television camera assembly connector.

    2. Measure the voltage of each terminal of the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V14-6 (CB+) - Body ground W - Body ground Power source

      Power switch on (ACC)

      Reverse (R) selected

      		 5.5 to 7.05 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance of each terminal of the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V14-1 (CURT) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the V14 rear television camera assembly connector.

    5. Measure the voltage and check for pulses at each terminal of the connector.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V14-3 (CV+) - V14-2 (CV-) R - B Display signal (NTSC) output

      Power switch on (IG)

      Reverse (R) selected

      Camera lens not covered, displaying an image

      Pulse generation

      (Refer to waveform 5)

      Power switch on (IG)

      Reverse (R) selected

      Camera lens covered, blacking out screen

      Pulse generation

      (Refer to waveform 6)
      V14-5 (CGND) - Body ground W-B - Body ground Shield ground Always Below 1 V

      Tech Tips

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.

      If the result is not as specified, the camera may have a malfunction.

    6. Reference (Oscilloscope waveform):

      B005Z8AE01

      Tech Tips

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.


      1. Waveform 5 (camera lens is not covered, displaying an image)

        Item Content
        Measurement Terminal V14-3 (CV+) - V14-2 (CV-)
        Measurement Setting 200 mV/DIV., 50 μs./DIV.
        Condition Power switch on (IG), reverse (R) selected

        Tech Tips


        • The video waveform changes according to the image sent by the rear television camera assembly.

        • The video waveform is constantly output when the power switch is on (ACC).

      2. Waveform 6 (camera lens is covered, blacking out the screen)

        Item Content
        Measurement Terminal V14-3 (CV+) - V14-2 (CV-)
        Measurement Setting 200 mV/DIV., 50 μs./DIV.
        Condition Power switch on (IG), reverse (R) selected

        Tech Tips


        • The video waveform changes according to the image sent by the rear television camera assembly.

        • The video waveform is constantly output when the power switch is on (ACC).

        Text in Illustration
        *a Waveform 5 (camera lens not covered, displaying an image)
        *b Waveform 6 (camera lens covered, blacking out the screen)
        *c Synchronization Signal
        *d Video Waveform

  3. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type)


  4. NAVIGATION RECEIVER ASSEMBLY (for Navigation Receiver Type) Click here

  5. HEADLIGHT LEVELING ECU ASSEMBLY (for LED Headlight) Click here