Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. REAR TELEVISION CAMERA ASSEMBLY

(a) Disconnect the T22 television camera assembly connector.

(a) Disconnect the T22 television camera assembly connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

T22-5 (CGND) - Body ground

L - Body ground

Ground

Always

Below 1 Ω

T22-6 (CB+) - Body ground

B - Body ground

Power source

Ignition switch ON, shift lever in R

5.5 to 7.05 V

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the rear television camera assembly connector.

(d) Measure the waveform according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

T22-3 (CV+) - T22-2 (CV-)

R - W

Video signal

Ignition switch ON, shift lever in R

Pulse generation

(See waveform 1)

Ignition switch ON, shift lever in R, screen blacked out by covering camera lens

Pulse generation

(See waveform 2)

HINT:

A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the radio and display receiver assembly*1 or navigation receiver assembly*2 with the connector connected.

If the result is not as specified, the rear television camera assembly may have a malfunction.

  • *1: w/o Navigation System
  • *2: w/ Navigation System

(e) Using an oscilloscope, check the waveform.

HINT:

HINT:

A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the inner rear view assembly with the connector connected.

(1) Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

T22-3 (CV+) - T22-2 (CV-)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Ignition switch ON, shift lever in R

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

(2) Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

T22-3 (CV+) - T22-2 (CV-)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Ignition switch ON, shift lever in R, screen blacked out by covering camera lens

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

Text in Illustration

*a

Waveform 1

*b

Waveform 2

*c

Synchronized Signal

*d

Video Waveform

2. RADIO AND DISPLAY RECEIVER ASSEMBLY (w/o Navigation System)

(See page 3. NAVIGATION RECEIVER ASSEMBLY (w/ Navigation System) )

3. NAVIGATION RECEIVER ASSEMBLY (w/ Navigation System)

(See page Diagnostic Trouble Code Chart Diagnostic Trouble Code Chart )

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