Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu

Toyota Tacoma (2015-2018) Service Manual / Pre-collision / Pre-collision System / Terminals Of Ecu

TERMINALS OF ECU

CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
M8-8 (IGB) - M8-1 (SGND)	LG - W-B	Power source	Ignition switch ON	11 to 14 V
M8-1 (SGND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(b) 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, 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
M8-3 (CA2H) - M8-1 (SGND)	W-B - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
M8-2 (CA2L) - M8-1 (SGND)	W - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)
M8-5 (CA1P) - M8-1 (SGND)	B - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
M8-6 (CA1N) - M8-1 (SGND)	W - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)

(1) Waveform 1

Item	Content
Terminal Name	Between M8-3 (CA2H) and M8-1 (SGND) Between M8-5 (CA1P) and M8-1 (SGND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between M8-3 (CA2H) and M8-1 (SGND)

Between M8-5 (CA1P) and M8-1 (SGND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(2) Waveform 2

Item	Content
Terminal Name	Between M8-2 (CA2L) and M8-1 (SGND) Between M8-6 (CA1N) and M8-1 (SGND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between M8-2 (CA2L) and M8-1 (SGND)

Between M8-6 (CA1N) and M8-1 (SGND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

NOTICE:

DTCs may be stored when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
Do not apply excessive force to the F46 forward recognition camera connector.

CHECK FORWARD RECOGNITION CAMERA

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F46-7 (IGB) - F46-10 (GND)	BE - W-B	Power source	Ignition switch ON	11 to 14 V
F46-7 (IGB) - F46-10 (GND)	BE - W-B	Power source	Ignition switch off	Below 1 V
F46-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(b) 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, 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
F46-5 (CA1P) - F46-10 (GND)	L - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
F46-11 (CA1N) - F46-10 (GND)	W - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)
F46-6 (CANH) - F46-10 (GND)	B - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
F46-12 (CANL) - F46-10 (GND)	W - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)

(1) Waveform 1

Item	Content
Terminal Name	Between F46-5 (CA1P) and F46-10 (GND) Between F46-6 (CANH) and F46-10 (GND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between F46-5 (CA1P) and F46-10 (GND)

Between F46-6 (CANH) and F46-10 (GND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(2) Waveform 2

Item	Content
Terminal Name	Between F46-11 (CA1N) and F46-10 (GND) Between F46-12 (CANL) and F46-10 (GND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between F46-11 (CA1N) and F46-10 (GND)

Between F46-12 (CANL) and F46-10 (GND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

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