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

CHECK FORWARD RECOGNITION CAMERA

1. Disconnect the W18 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
   W18-7 (IGB) - W18-10 (GND)	P - BR	Power source	Engine switch on (IG)	11 to 14 V
   			Engine switch off	Below 1 V
   W18-10 (GND) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

3. Connect the W18 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
   W18-2 (STRV) - W18-10 (GND)	GR - BR	LIN communication signal	Engine 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
   W18-5 (CA1P) - W18-10 (GND)	R - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
   W18-11 (CA1N) - W18-10 (GND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)
   W18-6 (CANH) - W18-10 (GND)	GR - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
   W18-12 (CANL) - W18-10 (GND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)

   
   
   1. 

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

      WAVEFORM 1

      Item	Content
      Terminal Name	Between W18-5 (CA1P) and W18-10 (GND) Between W18-6 (CANH) and W18-10 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine 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 W18-11 (CA1N) and W18-10 (GND) Between W18-12 (CANL) and W18-10 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine 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
   Q2-7 (B) - Q2-28 (GND)	B - BR	Power source	Engine switch on (IG)	11 to 14 V
   			Engine switch off	Below 1 V
   Q2-23 (SPSW) - Q2-28 (GND)	W - BR	Steering pad switch signal (Lane departure alert main switch signal)	Engine switch off Lane departure alert main switch off	1 MΩ or higher
   			Engine switch off Lane departure alert main switch on	228 to 252 Ω
   Q2-28 (GND) - Body ground	BR - 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
   Q2-8 (CA1P) - Q2-28 (GND)	V - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
   Q2-9 (CA1N) - Q2-28 (GND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)
   Q2-10 (CA2H) - Q2-28 (GND)	G - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
   Q2-11 (CA2L) - Q2-28 (GND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)

   
   
   1. 

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

      WAVEFORM 1

      Item	Content
      Terminal Name	Between Q2-8 (CA1P) - Q2-28 (GND) Between Q2-10 (CA2H) - Q2-28 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine 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 Q2-9 (CA1N) - Q2-28 (GND) Between Q2-11 (CA2L) - Q2-28 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.

CHECK STEERING VIBRATION ECU (STEERING VIBRATION AND HEATER ECU)

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

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   z10-4 (IG) - z10-1 (GND)	Power source	Engine switch on (IG)	11 to 14 V
   		Engine switch off	Below 1 V
   B-1 (M+) - z10-1 (GND)	Steering vibration operation signal	Engine switch on (IG) Steering vibration operating	Pulse generation
   		Engine switch on (IG) Steering vibration not operating	Below 1 V
   z10-1 (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) - z10-1 (GND)	LIN communication signal	Engine switch on (IG)	Pulse generation