FORWARD RECOGNITION CAMERA SYSTEM TERMINALS OF ECU

CHECK FORWARD RECOGNITION CAMERA

1. Disconnect the a1 forward recognition camera connector.

   Note

   
   

   • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.

   • Do not apply excessive force to the a1 forward recognition camera connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Tech Tips

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   a1-7 (IGB) - Body ground	LA-B - Body ground	Power source	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V
   a1-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

3. Reconnect the a1 forward recognition camera connector.

4. Measure the voltage according to the value(s) in the table below.

   Tech Tips

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   a1-1 (HTR) - Body ground	L - Body ground	Forward recognition with heater hood sub-assembly operation signal	Power switch on (IG) Forward recognition with heater hood sub-assembly not operating	11 to 14 V
   			Power switch on (IG) Forward recognition with heater hood sub-assembly operating	Below 1 V

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   a1-5 (CA1P) - a1-10 (GND)	R - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   a1-11 (CA1N) - a1-10 (GND)	P - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 2)
   a1-6 (CANH) - a1-10 (GND)	W - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   a1-12 (CANL) - a1-10 (GND)	R - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 2)

6. WAVEFORM 1

   
   
   1. 

      *a	1 V/DIV.
      *b	10 μsec./DIV.

      CAN communication signal

      Item	Content
      Terminal Name	Between a1-5 (CA1P) and a1-10 (GND) Between a1-6 (CANH) and a1-10 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Power switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.

7. WAVEFORM 2

   
   
   1. 

      *a	1 V/DIV.
      *b	10 μsec./DIV.

      CAN communication signal

      Item	Content
      Terminal Name	Between a1-11 (CA1N) and a1-10 (GND) Between a1-12 (CANL) and a1-10 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Power switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.