Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Park Assist / Monitoring / Rear View Monitor System / Terminals Of Ecu

TERMINALS OF ECU

1. REAR TELEVISION CAMERA ASSEMBLY

(a) Disconnect the R21 rear television camera assembly connector.

(b) Measure the voltage on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
R21-6 (CB+) - Body ground	B - Body ground	Power source	Ignition switch ACC	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 voltage and check for pulses at each terminal of the connector.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
R21-3 (CV+) - R21-2 (CV-)	R - W	Video signal	Ignition switch ON Shift lever in R Camera lens not covered, displaying an image	Pulse generation (Refer to waveform 1)
Ignition switch ON Shift lever in R Camera lens covered, blacking out screen	Pulse generation (Refer to waveform 2)
R21-5 (CGND) - Body ground	W-B - Body ground	Shield ground	Always	Below 1 V

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

R21-3 (CV+) - R21-2 (CV-)

R - W

Video signal

Ignition switch ON

Shift lever in R

Camera lens not covered, displaying an image

Pulse generation

(Refer to waveform 1)

Ignition switch ON

Shift lever in R

Camera lens covered, blacking out screen

Pulse generation

(Refer to waveform 2)

R21-5 (CGND) - Body ground

W-B - Body ground

Shield ground

Always

Below 1 V

HINT:

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

*1: for Navigation System
*2: for Audio and Visual System

If the result is not as specified, the rear television camera assembly may be malfunctioning.

(e) Reference (Oscilloscope waveform):

HINT:

*1: for Navigation System
*2: for Audio and Visual System

(1) Waveform 1 (camera lens is not covered, displaying an image)

Item	Content
Measurement terminal	R21-3 (CV+) - R21-2 (CV-)
Measurement setting	200 mV/DIV., 50 μs./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.
The video waveform is constantly output when the ignition switch is turned to ACC.

(2) Waveform 2 (camera lens is covered, blacking out the screen)

Item	Content
Measurement terminal	R21-3 (CV+) - R21-2 (CV-)
Measurement setting	200 mV/DIV., 50 μs./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.
The video waveform is constantly output when the ignition switch is turned to ACC.

Text in Illustration

*a	Waveform 1 (camera lens is not covered, displaying an image)
*b	Waveform 2 (camera lens is covered, blacking out the screen)
*c	Synchronization Signal
*d	Video Waveform

2. NAVIGATION RECEIVER ASSEMBLY (for Navigation System) (See page )

3. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Audio and Visual System) (See page )

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 ...

Diagnosis System

DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the rear view monitor system seems to be malfunctioning, ...

Other materials about Toyota Venza:

Precaution
PRECAUTION NOTICE: When the ignition switch is turned off and the engine temperature is high, the cooling fans may operate for a maximum of 6 minutes. After turning the ignition switch off, keep hands and objects away from the fans when t ...

Rear Occupant Classification Sensor RH Collision Detection (B1788)
DESCRIPTION DTC B1788 is output when the occupant classification ECU receives a collision detection signal sent by the rear occupant classification sensor RH if an accident occurs. DTC B1788 is also output when the front seat assembly RH is subjected to ...

AV Signal Stoppage (Low Battery Voltage) (B158F)
DESCRIPTION This DTC is stored when a video or audio signal is interrupted due to battery voltage input to the radio and display receiver assembly dropping temporarily. DTC No. DTC Detection Condition Trouble Area ...