LANE DEPARTURE ALERT SYSTEM(w/ Steering Control) TERMINALS OF ECU

CHECK FORWARD RECOGNITION CAMERA

1. Disconnect the T17 forward recognition camera connector.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   T17-7 (IGB) - T17-10 (GND)	GR - W-B	Power source	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V
   T17-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

3. Reconnect the T17 forward recognition camera connector.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   T17-2 (STRV) - T17-10 (GND)	B - W-B	LIN communication signal	Power switch on (IG)	Pulse generation

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

   Tech Tips

   If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the forward recognition camera is suspected.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   T17-5 (CA1P) - T17-10 (GND)	B - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   T17-11 (CA1N) - T17-10 (GND)	W - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 2)
   T17-6 (CANH) - T17-10 (GND)	B - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   T17-12 (CANL) - T17-10 (GND)	W - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 2)

   
   
   1. 

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

      WAVEFORM 1

      Item	Content
      Terminal Name	Between T17-5 (CA1P) and T17-10 (GND) Between T17-6 (CANH) and T17-10 (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.

   2. 

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

      WAVEFORM 2

      Item	Content
      Terminal Name	Between T17-11 (CA1N) and T17-10 (GND) Between T17-12 (CANL) and T17-10 (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.

CHECK DRIVING SUPPORT ECU ASSEMBLY

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   I159-7 (B) - I159-28 (GND)	Y - W-B	Power source	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V
   I159-23 (SPSW) - I159-28 (GND)	P - W-B	Steering pad switch signal (Lane departure alert main switch signal)	Power switch off Lane departure alert main switch off	1 MΩ or higher
   			Power switch off Lane departure alert main switch on	228 to 252 Ω
   I159-28 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

   Tech Tips

   If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the driving support ECU assembly is suspected.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   I159-8 (CA1P) - I159-28 (GND)	L - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   I159-9 (CA1N) - I159-28 (GND)	W - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 2)
   I159-10 (CA2H) - I159-28 (GND)	V - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   I159-11 (CA2L) - I159-28 (GND)	W - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 2)

   
   
   1. 

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

      WAVEFORM 1

      Item	Content
      Terminal Name	Between I159-8 (CA1P) - I159-28 (GND) Between I159-10 (CA2H) - I159-28 (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.

   2. 

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

      WAVEFORM 2

      Item	Content
      Terminal Name	Between I159-9 (CA1N) - I159-28 (GND) Between I159-11 (CA2L) - I159-28 (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.

CHECK STEERING VIBRATION ECU

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

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   z15-4 (IG) - z15-1 (GND)	Power source	Power switch on (IG)	11 to 14 V
   		Power switch off	Below 1 V
   B-1 (M+) - z15-1 (GND)	Steering vibration operation signal	Power switch on (IG) Steering vibration operating	Pulse generation
   		Power switch on (IG) Steering vibration not operating	Below 1 V
   z15-1 (GND) - Body ground	Ground	Always	Below 1 Ω

2. Measure the waveform according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   A-2 (LDW) - z15-1 (GND)	LIN communication signal	Power switch on (IG)	Pulse generation