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

Toyota Tacoma (2015-2018) Service Manual / Park Assist / Monitoring / Rear View Monitor System / Terminals Of Ecu

TERMINALS OF ECU

1. REAR TELEVISION CAMERA ASSEMBLY

(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.

(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)

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:

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 )

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:

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK BATTERY CONDITION NOTICE: If the battery is weak or if the engine is difficult to start, recharge the battery and perform inspections again before returning the vehicle to the customer. (a) Check the battery for damage or deformation. If severe damage, ...

System Description
SYSTEM DESCRIPTION 1. TOUCH SWITCH OUTLINE Touch switches are touch-sensitive (interactive) switches operated by touching the screen. When a switch is pressed, the outer film bends in to contact the inner glass at the pressed position. By doing this, the voltage ratio is measured and the pre ...

Removal
REMOVAL PROCEDURE 1. PRECAUTION NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before p ...