Terminals Of Ecu [06/2018 - 09/2022]

Fig 1: Clearance Warning ECU Assembly Terminals Of ECU [06/2018 - 09/2022]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the N41 clearance warning ECU assembly connector.
2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   N41-1 (IG) - N41-30 (E)	B - W-B	IG engine source signal	Engine switch off	Below 1 V
   			Engine switch on (IG)	11 to 14 V*1 10.5 to 16 V*2
   N41-30 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

   1. *1: w/o Stop and Start System
   2. *2: w/ Stop and Start System
3. Reconnect the N41 clearance warning ECU assembly connector.
4. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   N41-4 (BOF) - N41-30 (E)	R - W-B	Power source for front sensor circuit	Engine switch off	Below 1 V
   			Engine switch on (IG) Parking support brake system on	11 to 14 V
   N41-6 (E5) - N41-30 (E)	W - W-B	Ground for front clearance sonar	Always	Below 1 Ω
   N41-8 (SOF) - N41-30 (E)	B - W-B	Front sensor communication signal (Front clearance sonar sensor)	Engine switch on (IG) Parking support brake system on Shift lever in any position other than P or R Vehicle speed is less than approximately 10 km/h (6 mph)	Pulse generation (Refer to waveform 1)
   N41-14 (CBZ) - N41-13 (EF)	LG - L	No. 1 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)
   N41-15 (BBZ) - N41-16 (ER)	G - BE	No. 2 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)
   N41-22 (BOR) - N41-30 (E)	LG - W-B	Power source for rear sensor circuit	Engine switch off	Below 1 V
   			Engine switch on (IG) Parking support brake system on	11 to 14 V
   N41-23 (E1) - N41-30 (E)	GR - W-B	Ground for rear clearance sonar	Always	Below 1 Ω
   N41-24 (SOR) - N41-30 (E)	SB - W-B	Rear sensor communication signal (Rear clearance sonar sensor)	Engine switch on (IG) Parking support brake system on Shift lever in R Vehicle speed is less than approximately 10 km/h (6 mph)	Pulse generation (Refer to waveform 3)

5. Using an oscilloscope, check waveform 1.
   1. Waveform 1 (Reference)
      Fig 2: Waveform 1 [06/2018 - 09/2022]

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Content
      Measurement terminal	N41-8 (SOF) - N41-30 (E)
      Measurement setting	5 V/DIV., 1 ms./DIV.
      Condition	Engine switch on (IG) Parking support brake system on Shift lever in any position other than P or R Vehicle speed is less than approximately 10 km/h (6 mph)

6. Using an oscilloscope, check waveform 2.
   1. Waveform 2 (Reference)
      Fig 3: Waveform 2 [06/2018 - 09/2022]

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Content
      Measurement terminal	N41-14 (CBZ) - N41-13 (EF) N41-15 (BBZ) - N41-16 (ER)
      Measurement setting	2 V/DIV., 500 μs./DIV.
      Condition	Buzzer sounding

      HINT: 

      The amplitude of the waveform changes according to the set volume.

7. Using an oscilloscope, check waveform 3.
   1. Waveform 3 (Reference)
      Fig 4: Waveform 3 [06/2018 - 09/2022]

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Content
      Measurement terminal	N41-24 (SOR) - N41-30 (E)
      Measurement setting	5 V/DIV., 1 ms./DIV.
      Condition	Engine switch on (IG) Parking support brake system on Shift lever in R Vehicle speed is less than approximately 10 km/h (6 mph)

Refer to TERMINALS OF ECU [06/2018 - 08/2020] , or refer to TERMINALS OF ECU [08/2020 - 08/2021] , or refer to TERMINALS OF ECU [08/2021 - ]

Refer to TERMINALS OF ECM [06/2018 - 08/2020] , or refer to TERMINALS OF ECM [08/2020 - 08/2021] , or refer to TERMINALS OF ECM [08/2021 - ]

Refer to TERMINALS OF ECU [06/2018 - ]

Refer to TERMINALS OF ECU [06/2018 - 08/2021] , or refer to TERMINALS OF ECU [08/2021 - 09/2022]