Toyota Venza manuals

Toyota Venza: 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.

(c) Reconnect the R21 rear television camera assembly connector.

(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

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:

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

(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 )


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