PRE-CRASH SAFETY SYSTEM > TERMINALS OF ECU

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1. Disconnect the seat belt control ECU connectors.
   

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   H6-7 (+B) - Body ground	B - Body ground	Auxiliary battery voltage	Power switch off	11 to 14 V
   H6-8 (PGND) - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω
   H7-8 (IG1) - Body ground	L - Body ground	Seat belt control ECU power supply	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V

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

3. Reconnect the connectors.
   

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   H6-2 (MOR+) - H6-1 (MOR-)	B - W	Seat belt motor RH power supply	Power switch on (IG)	4.0 to 8.5 V
   			Power switch off	Below 1 V
   H6-3 (MOL+) - H6-4 (MOL-)	B - W	Seat belt motor LH power supply	Power switch on (IG)	4.0 to 8.5 V
   			Power switch off	Below 1 V

   If the result is not as specified, the ECU may be malfunctioning.
   

1. Disconnect the driving support ECU connector.
   

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   H5-25 (GND) - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω
   H5-5 (PBSW)* - Body ground	L - Body ground	Pre-crash brake cancel switch	Pre-crash brake cancel switch assembly on	Below 1 Ω
   			Pre-crash brake cancel switch assembly off	10 kΩ or higher

   *: w/ Pre-crash Brake
   If the result is not as specified, there may be a malfunction on the wire harness side.
   

3. Reconnect the connector.
   

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

   Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
   H5-17 (CA2L) - H5-25 (GND)	B - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   H5-7 (MODE) - Body ground	R - Body ground	MODE signal	Power switch on (IG) MODE switch off	11 to 14 V
   			Power switch on (IG) MODE switch on	Below 1 V
   H5-16 (LRDD) - Body ground	SB - Body ground	Driving support ECU communication signal	Power switch on (IG)	Pulse generation (See waveform 2)
   H5-38 (LRRD) - Body ground	R - Body ground	Driving support ECU communication signal	Power switch on (IG)	Pulse generation (See waveform 3)
   H5-23 (CCS) - H5-25 (GND)	LG - W-B	Cruise control main switch signal	Power switch on (IG)	10 to 14 V
   H5-23 (CCS) - H5-25 (GND)	LG - W-B	Cruise control main switch signal	Power switch on (IG), CANCEL switch on	6.6 to 10.1 V
   H5-23 (CCS) - H5-25 (GND)	LG - W-B	Cruise control main switch signal	Power switch on (IG), Main switch on	Below 1 V
   H5-39 (CA2H) - H5-25 (GND)	L - W-B	CAN communication signal	Power switch on (IG)	Pulse generation (See waveform 4)





5. Waveform 1
   
   

   1. CAN communication signal
      

      Item	Content
      Driving Support ECU Terminal Name	Between CA2L and GND
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Power switch on (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.





6. Waveform 2
   

   Item	Content
   Driving Support ECU Terminal Name	Between LRDD and GND
   Tester Range	2 V/DIV., 10 μsec./DIV.
   Condition	Power switch on (IG)





7. Waveform 3
   

   Item	Content
   Driving Support ECU Terminal Name	Between LRRD and GND
   Tester Range	2 V/DIV., 10 μsec./DIV.
   Condition	Power switch on (IG)





8. Waveform 4
   
   

   1. CAN communication signal
      

      Item	Content
      Driving Support ECU Terminal Name	Between CA2H and GND
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Power switch on (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.