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 )

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 ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Rear View Monitor System DTC Code Detection Item See page C1622 Open or Short Circuit in Back Camera Signal ...

Other materials:

Lost Communication with Front Camera Module (U023A)
DESCRIPTION These DTCs are stored when the CAN communication system is malfunctioning. DTC No.   DTC Detecting Condition Trouble Area U023A Lost Communication With Image Processing Module"A" The main body ECU ...

Precaution
PRECAUTION 1. Check that the battery cables are connected to the correct terminals. 2. Disconnect the battery cables when the battery is given a quick charge. 3. Do not perform tests with a high voltage insulation resistance tester. 4. Never disconnect the battery while the engine is running. 5 ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals ...

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