Toyota Tundra Service Manual: 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

d1-8 (IGB) - d1-1 (SGND)

R - W-B

Power source

Ignition switch ON

11 to 14 V

d1-1 (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

d1-3 (CA2H) - d1-1 (SGND)

R - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

d1-2 (CA2L) - d1-1 (SGND)

W - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

d1-5 (CA1P) - d1-1 (SGND)

Y - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

d1-6 (CA1N) - d1-1 (SGND)

W - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

(1) Waveform 1

Item

Content

Terminal Name

Between d1-3 (CA2H) and d1-1 (SGND)

Between d1-5 (CA1P) and d1-1 (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 d1-2 (CA2L) and d1-1 (SGND)

Between d1-6 (CA1N) and d1-1 (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 W9 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

W9-7 (IGB) - W9-10 (GND)

R - W-B

Power source

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

W9-10 (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

W9-5 (CA1P) - W9-10 (GND)

BE - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

W9-11 (CA1N) - W9-10 (GND)

W - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

W9-6 (CANH) - W9-10 (GND)

G - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

W9-12 (CANL) - W9-10 (GND)

W - W-B

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

(1) Waveform 1

Item

Content

Terminal Name

Between W9-5 (CA1P) and W9-10 (GND)

Between W9-6 (CANH) and W9-10 (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 W9-11 (CA1N) and W9-10 (GND)

Between W9-12 (CANL) and W9-10 (GND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

    System Diagram

    Lost Communication With Image Processing Module "A" (U023A)

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