PARKING ASSIST MONITOR SYSTEM > TERMINALS OF ECU

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1. Disconnect the H9 connector from the 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
   H9-1 (+B) - H9-3 (GND1)	B - W-B	Power source signal	Power switch off	11 to 14 V
   H9-3 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   H9-7 (IG) - H9-3 (GND1)	V - W-B	IG power source signal	Power switch on (IG)	11 to 14 V
   H9-8 (ACC) - H9-3 (GND1)	R - W-B	ACC power source signal	Power switch on (ACC)	11 to 14 V

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

3. Reconnect the H9 connector to the ECU.
   

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
   H9-21 (CANL) - H9-3 (GND1)	B - W-B	CAN communication signal	CAN communication circuit	Pulse generation
   H9-22 (CANH) - H9-3 (GND1)	P - W-B	CAN communication signal	CAN communication circuit	Pulse generation
   H9-24 (TX-) - H9-25 (TX+)	L - R	AVC-LAN communication signal	-	-
   H8-11 (CV-) - H9-3 (GND1)	W - W-B	Rear television camera ground	Always	Below 1 V
   H8-12 (CV+) - H9-3 (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)
   H8-13 (CGND) - H9-3 (GND1)	Shield - W-B	Rear television camera ground (shield)	Always	Below 1 V
   H8-14 (CB+) - H9-3 (GND1)	B - W-B	Power source to rear television camera	Power switch on (READY) Reverse (R) selected	5.5 to 7.0 V

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





5. Reference (Oscilloscope waveform):
   

   HINT:

   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)	H8-12 (CV+) - H9-3 (GND1)
      Tool Setting	200 mV/DIV., 50 μsec./DIV.
      Condition	Power switch on (READY), reverse (R) selected

      HINT:

      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)	H8-12 (CV+) - H9-3 (GND1)
      Tool Setting	200 mV/DIV., 50 μsec./DIV.
      Condition	Power switch on (READY), reverse (R) selected

      HINT:

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

      Text in Illustration 

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

1. Disconnect the V8 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
   V8-4 (CB+) - Body ground	B - Body ground	Power source	Power switch on (READY) Reverse (R) selected	5.5 to 7.0 V

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

3. Reconnect the V8 connector to the rear television camera assembly.
   

4. Check for pulses between each terminal of the connector.
   
   

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   V8-2 (CV+) - V8-1 (CV-)	R - W	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)

   HINT:

   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. Reference (Oscilloscope waveform):
   

   HINT:

   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)	V8-2 (CV+) - V8-1 (CV-)
      Tool Setting	200 mV/DIV., 50 μsec./DIV.
      Condition	Power switch on (READY), reverse (R) selected

      HINT:

      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)	V8-2 (CV+) - V8-1 (CV-)
      Tool Setting	200 mV/DIV., 50 μsec./DIV.
      Condition	Power switch on (READY), reverse (R) selected

      HINT:

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

      Text in Illustration 

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