INTELLIGENT PARKING ASSIST SYSTEM TERMINALS OF ECU


  1. PARKING ASSIST ECU

    A01JBNDE04

    1. Disconnect the L152 connector from the parking assist ECU.

    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
      L152-1 (+B) - L152-4 (GND1) SB - W-B Power source signal Power switch off 11 to 14 V
      L152-4 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L152-8 (IG) - L152-4 (GND1) B - W-B IG power source signal Power switch on (IG) 11 to 14 V
      L152-9 (ACC) - L152-4 (GND1) GR - W-B ACC power source signal Power switch on (ACC) 11 to 14 V
      L152-11 (TX+) - L152-10 (TX-) LG - P AVC-LAN communication signal - -

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

    3. Reconnect the L152 connector to the ECU.

    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
      L151-1 (CSB3) - L152-4 (GND1) G - W-B Power source to ultrasonic sensor Power switch on (READY) 7.2 to 8.8 V
      L151-2 (CSG3) - L152-4 (GND1) R - W-B Ultrasonic sensor ground Always Below 1 Ω

      L151-8 (HO1) - L152-4 (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
      L151-9 (HI1) - L152-4 (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
      L151-14 (CB+) - L152-4 (GND1) W - W-B Power source to rear television camera

      Power switch on (READY)

      reverse (R) selected

      		 5.8 to 7.0 V
      L151-15 (CV+) - L152-4 (GND1) R - W-B Rear television camera display signal (NTSC) input

      Power switch on (READY)

      Reverse (R) selected

      Camera lens not covered, displaying an image

      Pulse generation

      (See waveform 1)

      Power switch on (READY)

      Reverse (R) selected

      Camera lens covered, blacking out screen

      Pulse generation

      (See waveform 2)
      L151-19 (LIN3) GR Ultrasonic sensor signal input and output - -
      L151-26 (ISSW) - L152-4 (GND1) L - W-B Parking assist pre support signal input

      Power switch on (READY)

      Parking assist pre support switch assembly pushed in

      		 Below 1 V

      Power switch on (READY)

      Parking assist pre support switch assembly not pushed

      		 4.75 to 5.25 V

      L151-27 (HBL+) - L152-4 (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

      L151-28 (HB+) - L152-4 (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

      L151-29 (HGND) - Body ground

      *1

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

      L151-30 (HBE+) - L152-4 (GND1)

      *2

      		 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
      L151-31 (HG1) - Body ground Y - Body ground Rear height control sensor ground Always Below 1 Ω
      L151-37 (CGND) - L152-4 (GND1) G - W-B Rear television camera ground (shield) Always Below 1 V
      L151-38 (CV-) - L152-4 (GND1) B - W-B Rear television camera ground Always Below 1 V
      L151-39 (CANL) - L152-4 (GND1) BR - W-B CAN communication signal CAN communication circuit Pulse generation
      L151-40 (CANH) - L152-4 (GND1) Y - W-B CAN communication signal CAN communication circuit Pulse generation
      L123-1 (GVIF) B 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. A01JBFZE22
      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

      Reference (Oscilloscope waveform):

      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
        Terminal No. (Symbol) L151-14 (CB+) - L152-4 (GND1)
        Tool Setting 200 mV/DIV., 50 μsec./DIV.
        Condition Power switch on (READY), reverse (R) selected

        Tech Tips

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

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

        Item Content
        Terminal No. (Symbol) L151-14 (CB+) - L152-4 (GND1)
        Tool Setting 200 mV/DIV., 50 μsec./DIV.
        Condition Power switch on (READY), reverse (R) selected

        Tech Tips

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

  2. REAR TELEVISION CAMERA ASSEMBLY

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    1. Disconnect the V6 connector from the rear television camera assembly.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V6-3 (CGND) - Body ground W-B - Body ground Ground Always Below 1 V
      V6-4 (CB+) - V6-3 (CGND) W - W-B Power source

      Power switch on (READY)

      Reverse (R) selected

      		 5.8 to 7.0 V

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

    3. Reconnect the V6 connector to the rear television camera assembly.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V6-2 (CV+) - V6-1 (CV-) R - B Display signal

      Power switch on (READY)

      Reverse (R) selected

      Camera lens not covered, displaying an image

      Pulse generation

      (See waveform 1)

      Power switch on (READY)

      Reverse (R) selected

      Camera lens covered, blacking out screen

      Pulse generation

      (See waveform 2)

      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.

    5. A01JBFZE22
      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

      Reference (Oscilloscope waveform):

      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
        Terminal No. (Symbol) V6-2 (CV+) - V6-1 (CV-)
        Tool Setting 200 mV/DIV., 50 μsec./DIV.
        Condition Power switch on (READY), reverse (R) selected

        Tech Tips

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

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

        Item Content
        Terminal No. (Symbol) V6-2 (CV+) - V6-1 (CV-)
        Tool Setting 200 mV/DIV., 50 μsec./DIV.
        Condition Power switch on (READY), reverse (R) selected

        Tech Tips

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

  3. NAVIGATION ECU SUB-ASSEMBLY Click here

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