Terminals Of Ecu [10/2023 - ]

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CLEARANCE WARNING ECU ASSEMBLY

Fig 1: Clearance Warning ECU Assembly [10/2023 - ]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

for TMMC Made

for TMC Made

Disconnect the G25*1 or H4*2 clearance warning ECU assembly connector.
1. *1: for TMMC Made
2. *2: for TMC Made

Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

FOR TMMC MADE:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G25-1 (IG) - G25-28 (E)	B - W-B	IG power source signal	Power switch off	Below 1 V
G25-1 (IG) - G25-28 (E)	B - W-B	IG power source signal	Power switch on (IG)	11 to 14 V
G25-28 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

FOR TMC MADE:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H4-1 (IG) - H4-31 (E)	B - W-B	IG power source signal	Power switch off	Below 1 V
H4-1 (IG) - H4-31 (E)	B - W-B	IG power source signal	Power switch on (IG)	11 to 14 V
H4-31 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

Reconnect the G25*1 or H4*2 clearance warning ECU assembly connector.
1. *1: for TMMC Made
2. *2: for TMC Made

Measure the voltage, resistance and check for pulses according to the value(s) in the table below.

FOR TMMC MADE:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G25-2 (BOF) - G25-28 (E)	R - W-B	Power source for front sensor circuit	Power switch off	Below 1 V
G25-2 (BOF) - G25-28 (E)	R - W-B	Power source for front sensor circuit	Power switch on (IG) Intuitive parking assist system on	11 to 14 V
G25-3 (SOF) - G25-28 (E)	L - W-B	Front sensor communication signal (Front clearance sonar sensor)	Power switch on (IG) Intuitive parking assist system on Shift lever in any position other than P Vehicle speed is less than approximately 10 km/h (6 mph)	Pulse generation (Refer to waveform 1)
G25-4 (E5) - G25-28 (E)	W - W-B	Ground for front clearance sonar	Always	Below 1 Ω
G25-9 (CBZ) - G25-8 (EF)	LG - L	No. 1 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)
G25-19 (BOR) - G25-28 (E)	LG - W-B	Power source for rear sensor circuit	Power switch off	Below 1 V
G25-19 (BOR) - G25-28 (E)	LG - W-B	Power source for rear sensor circuit	Power switch on (IG) Intuitive parking assist system on	11 to 14 V
G25-20 (SOR) - G25-28 (E)	SB - W-B	Rear sensor communication signal (Rear clearance sonar sensor)	Power switch on (IG) Intuitive parking assist system on Shift lever in R	Pulse generation (Refer to waveform 3)
G25-21 (E1) - G25-28 (E)	GR - W-B	Ground for rear clearance sonar	Always	Below 1 Ω
G25-25 (BBZ) - G25-26 (ER)	LG - L	No. 2 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)

FOR TMC MADE:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H4-2 (BOF) - H4-31 (E)	R - W-B	Power source for front sensor circuit	Power switch off	Below 1 V
H4-2 (BOF) - H4-31 (E)	R - W-B	Power source for front sensor circuit	Power switch on (IG) Intuitive parking assist system on	11 to 14 V
H4-4 (SOF) - H4-31 (E)	L - W-B	Front sensor communication signal (Front clearance sonar sensor)	Power switch on (IG) Intuitive parking assist system on Shift lever in any position other than P Vehicle speed is less than approximately 10 km/h (6 mph)	Pulse generation (Refer to waveform 1)
H4-3 (E5) - H4-31 (E)	W - W-B	Ground for front clearance sonar	Always	Below 1 Ω
H4-9 (CBZ) - H4-8 (EF)	LG - L	No. 1 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)
H4-19 (BOR) - H4-31 (E)	LG - W-B	Power source for rear sensor circuit	Power switch off	Below 1 V
H4-19 (BOR) - H4-31 (E)	LG - W-B	Power source for rear sensor circuit	Power switch on (IG) Intuitive parking assist system on	11 to 14 V
H4-21 (SOR) - H4-31 (E)	SB - W-B	Rear sensor communication signal (Rear clearance sonar sensor)	Power switch on (IG) Intuitive parking assist system on Shift lever in R	Pulse generation (Refer to waveform 3)
H4-20 (E1) - H4-31 (E)	GR - W-B	Ground for rear clearance sonar	Always	Below 1 Ω
H4-26 (BBZ) - H4-25 (ER)	LG - L	No. 2 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)

Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Fig 2: Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	for TMMC Made

Item	Content
Measurement terminal	G25-3 (SOF) - G25-28 (E)1 H4-4 (SOF) - H4-31 (E)2
Measurement setting	5 V/DIV., 1 ms./DIV.1 5 V/DIV., 100 μs./DIV.2
Condition	Power switch on (IG) Intuitive parking assist system on Shift lever in any position other than P Vehicle speed is less than approximately 10 km/h (6 mph)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	for TMC Made

Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Fig 3: Waveform 2

Item	Content
Measurement terminal	G25-9 (CBZ) - G25-8 (EF)1 H4-9 (CBZ) - H4-8 (EF)2 G25-25 (BBZ) - G25-26 (ER)1 H4-26 (BBZ) - H4-25 (ER)2
Measurement setting	2 V/DIV., 500 μs./DIV.
Condition	Buzzer sounding

HINT:

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

Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item	Content
Measurement terminal	G25-20 (SOR) - G25-28 (E)1 H4-21 (SOR) - H4-31 (E)2
Measurement setting	5 V/DIV., 1 ms./DIV.1 5 V/DIV., 100 μs./DIV.2
Condition	Power switch on (IG) Intuitive parking assist system on Shift lever in R

*a	for TMMC Made

*a	for TMC Made