Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY

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

HINT:

The waveform varies depending on the CAN communication signal.

(2) Waveform 2

(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

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

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

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

HINT:

The waveform varies depending on the CAN communication signal.

(2) Waveform 2

(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

HINT:

The waveform varies depending on the CAN communication signal.

Utility
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 ...

Utility
UTILITY NOTICE: When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another ...

Other materials:

Open in One Side of Bus 3 Branch Line
DESCRIPTION When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Ch ...

Diagnostic Trouble Code Chart
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Disassembly
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