Terminals Of Ecu [10/2016 - 09/2020]

CHECK DRIVING SUPPORT ECU ASSEMBLY

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
M2-7 (B) - M2-28 (GND)	B - BR	Power source	Engine switch on (IG)	11 to 14 V
M2-7 (B) - M2-28 (GND)	B - BR	Power source	Engine switch off	Below 1 V
M2-3 (BZ) - M2-28 (GND)	SB - BR	Skid control buzzer output	Engine switch on (IG), buzzer not sounding	11 to 14 V
M2-3 (BZ) - M2-28 (GND)	SB - BR	Skid control buzzer output	Engine switch on (IG), buzzer sounding	Below 1 V
M2-28 (GND) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

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

HINT:

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
M2-8 (CA1P) - M2-28 (GND)	G - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
M2-9 (CA1N) - M2-28 (GND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)
M2-10 (CA2H) - M2-28 (GND)	G - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
M2-11 (CA2L) - M2-28 (GND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)

WAVEFORM 1

Item	Content
Terminal Name	Between M2-8 (CA1P) - M2-28 (GND) Between M2-10 (CA2H) - M2-28 (GND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Engine switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

Fig 1: Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

WAVEFORM 2

Item	Content
Terminal Name	Between M2-9 (CA1N) - M2-28 (GND) Between M2-11 (CA2L) - M2-28 (GND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Engine switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

Fig 2: Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
B10-8 (IGB) - B10-1 (SGND)	G - BR	Power source	Engine switch on (IG)	11 to 14 V
B10-1 (SGND) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

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

HINT:

If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the millimeter wave radar sensor assembly is suspected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
B10-3 (CA2H) - B10-1 (SGND)	L - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
B10-2 (CA2L) - B10-1 (SGND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)
B10-5 (CA1P) - B10-1 (SGND)	LG - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 1)
B10-6 (CA1N) - B10-1 (SGND)	B - BR	CAN communication signal	Engine switch on (IG)	Pulse generation (See waveform 2)

WAVEFORM 1

Item	Content
Terminal Name	Between B10-3 (CA2H) and B10-1 (SGND) Between B10-5 (CA1P) and B10-1 (SGND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Engine switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

Fig 3: Waveform 1

WAVEFORM 2

Item	Content
Terminal Name	Between B10-2 (CA2L) and B10-1 (SGND) Between B10-6 (CA1N) and B10-1 (SGND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Engine switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

Fig 4: Waveform 2