Toyota Venza: Back Camera Disconnected (C1622)

Toyota Venza Service Manual / Park Assist / Monitoring / Rear View Monitor System / Back Camera Disconnected (C1622)

DESCRIPTION

This DTC is stored if the navigation receiver assembly*1 or radio and display receiver assembly*2 judges that the signals or signal lines between the navigation receiver assembly*1 or radio and display receiver assembly*2, and the rear television camera assembly are not normal as a result of its self check.

DTC No.	DTC Detection Condition	Trouble Area
C1622	Open or short in the rear television camera assembly signal circuit	Harness or connector Rear television camera assembly Navigation receiver assembly1 Radio and display receiver assembly2

*1: for Navigation System

*2: for Audio and Visual System

WIRING DIAGRAM

PROCEDURE

1.	CONFIRM MODEL

(a) Choose the model to be inspected.

Result	Proceed to
for Navigation System	A
for Audio and Visual System	B

GO TO STEP 5

2.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the E51 navigation receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E51-11 (CA+) - R21-6 (CB+)	Always	Below 1 Ω
E51-12 (V+) - R21-3 (CV+)	Always	Below 1 Ω
E51-24 (V-) - R21-2 (CV-)	Always	Below 1 Ω
E51-23 (CGND) - R21-5 (CGND)	Always	Below 1 Ω
E51-11 (CA+) - Body ground	Always	10 kΩ or higher
E51-12 (V+) - Body ground	Always	10 kΩ or higher
E51-24 (V-) - Body ground	Always	10 kΩ or higher
E51-23 (CGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Reconnect the E51 navigation receiver assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E51-11 (CA+) - E51-23 (CGND)	Ignition switch ACC	5.5 to 7.05 V
E51-24 (V-) - Body ground	Always	Below 1 V
E51-23 (CGND) - Body ground	Always	Below 1 V

Text in Illustration

*a	Component with harness connected (Navigation Receiver Assembly)

REPLACE NAVIGATION RECEIVER ASSEMBLY

4.	INSPECT REAR TELEVISION CAMERA ASSEMBLY

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

(b) Using an oscilloscope, check the waveform of the rear television camera assembly.

Text in Illustration

*a	Component with harness connected (Navigation Receiver Assembly)

HINT:

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

OK:

Waveform is similar to that shown in the illustration.

Item	Content
Measurement terminal	E51-12 (V+) - E38-7 (GND1)
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

REPLACE NAVIGATION RECEIVER ASSEMBLY

REPLACE REAR TELEVISION CAMERA ASSEMBLY

5.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the E52 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E52-11 (CA+) - R21-6 (CB+)	Always	Below 1 Ω
E52-12 (V+) - R21-3 (CV+)	Always	Below 1 Ω
E52-24 (V-) - R21-2 (CV-)	Always	Below 1 Ω
E52-23 (CGND) - R21-5 (CGND)	Always	Below 1 Ω
E52-11 (CA+) - Body ground	Always	10 kΩ or higher
E52-12 (V+) - Body ground	Always	10 kΩ or higher
E52-24 (V-) - Body ground	Always	10 kΩ or higher
E52-23 (CGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Reconnect the E52 radio and display receiver assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E52-11 (CA+) - E52-23 (CGND)	Ignition switch ACC	5.5 to 7.05 V
E52-24 (V-) - Body ground	Always	Below 1 V
E52-23 (CGND) - Body ground	Always	Below 1 V

Text in Illustration

*a	Component with harness connected (Radio and Display Receiver Assembly)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

7.	INSPECT REAR TELEVISION CAMERA ASSEMBLY

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

(b) Using an oscilloscope, check the waveform of the rear television camera assembly.

Text in Illustration

*a	Component with harness connected (Radio and Display Receiver Assembly)

HINT:

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

OK:

Waveform is similar to that shown in the illustration.

Item	Content
Measurement terminal	E52-12 (V+) - E4-7 (GND1)
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

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE REAR TELEVISION CAMERA ASSEMBLY

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