PRE-COLLISION SYSTEM TERMINALS OF ECU

CHECK MILLIMETER WAVE RADAR SENSOR

1. 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
   A2-8 (IGB) - A2-1 (SGND)	B - W-B	Power source	Ignition switch ON	11 to 14 V*1 10.5 to 16 V*2
   A2-1 (SGND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

   
   

   • *1: w/o Stop and Start System

   • *2: w/ Stop and Start System

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A2-3 (CA2H) - A2-1 (SGND)	G - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
   A2-2 (CA2L) - A2-1 (SGND)	GR - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)
   A2-5 (CA1P) - A2-1 (SGND)	G - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
   A2-6 (CA1N) - A2-1 (SGND)	R - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)

3. WAVEFORM 1

   
   
   1. 

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

      CAN communication signal

      Item	Content
      Terminal Name	Between A2-3 (CA2H) and A2-1 (SGND) Between A2-5 (CA1P) and A2-1 (SGND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Ignition switch ON

      Tech Tips

      The waveform varies depending on the CAN communication signal.

4. WAVEFORM 2

   
   
   1. 

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

      CAN communication signal

      Item	Content
      Terminal Name	Between A2-2 (CA2L) and A2-1 (SGND) Between A2-6 (CA1N) and A2-1 (SGND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Ignition switch ON

      Tech Tips

      The waveform varies depending on the CAN communication signal.

CHECK FORWARD RECOGNITION CAMERA

1. 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
   R5-8 (BZ) - R5-10 (GND)	B - W-B*3 P - W-B*4	Pre-collision city buzzer	Ignition switch ON, pre-collision city buzzer not operating	11 to 14 V
   			Ignition switch ON, pre-collision city buzzer operating	0 to 1.5 V
   R5-3 (LKSW) - R5-10 (GND)	R - W-B*3 SB - W-B*4	Pre-collision system cancel switch assembly	Pre-collision system cancel switch assembly being pressed	Below 1 Ω
   			Pre-collision system cancel switch assembly not being pressed	100 kΩ or higher
   R5-7 (IGB) - R5-10 (GND)	B - W-B	Power source	Ignition switch ON	11 to 14 V*1
   				10.5 to 16 V*2
   			Ignition switch off	Below 1 V
   R5-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

   
   

   • *1: w/o Stop and Start System

   • *2: w/ Stop and Start System

   • *3: for TMMT Made

   • *4: for TMC Made

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   R5-5 (CA1P) - R5-10 (GND)	R - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
   R5-6 (CANH) - R5-10 (GND)	G - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
   R5-11 (CA1N) - R5-10 (GND)	GR - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)
   R5-12 (CANL) - R5-10 (GND)	R - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)

3. WAVEFORM 1

   
   
   1. 

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

      CAN communication signal

      Item	Content
      Terminal Name	Between R5-5 (CA1P) - R5-10 (GND) Between R5-6 (CANH) - R5-10 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Ignition switch ON

      Tech Tips

      The waveform varies depending on the CAN communication signal.

4. WAVEFORM 2

   
   
   1. 

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

      CAN communication signal

      Item	Content
      Terminal Name	Between R5-11 (CA1N) - R5-10 (GND) Between R5-12 (CANL) - R5-10 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Ignition switch ON

      Tech Tips

      The waveform varies depending on the CAN communication signal.