Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Back Camera Disconnected (C1622)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Parking Assist Monitor System(for Gasoline Model) / Back Camera Disconnected (C1622)

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1622	Back Camera Disconnected	Open or short in the television camera assembly signal circuit	Harness or connector Television camera assembly Radio and display receiver assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed.

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PROCEDURE

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

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the P19 television camera assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G2-30 (CA+) - P19-6 (CB+)	Always	Below 1 Ω
G2-28 (V+) - P19-3 (CV+)	Always	Below 1 Ω
G2-29 (V-) - P19-2 (CV-)	Always	Below 1 Ω
G2-27 (CGND) - P19-5 (CGND)	Always	Below 1 Ω
G2-26 (CSLD) - Body ground	Always	10 kΩ or higher
G2-30 (CA+) or P19-6 (CB+) - Body ground	Always	10 kΩ or higher
G2-28 (V+) or P19-3 (CV+) - Body ground	Always	10 kΩ or higher
G2-29 (V-) or P19-2 (CV-) - Body ground	Always	10 kΩ or higher
G2-27 (CGND) or P19-5 (CGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Reconnect the G2 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
G2-29 (V-) - Body ground	Always	Below 1 Ω
G2-27 (CGND) - Body ground	Always	Below 1 Ω

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
G2-30 (CA+) - G2-27 (CGND)	Engine switch on (ACC)	5.5 to 7.05 V

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

3.	INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (V+, GND1)

(a) Reconnect the P19 television camera assembly connector.

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

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

HINT:

A waterproof connector is used for the 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	G2-28 (V+) - G3-1 (GND1)
Measurement setting	200 mV/DIV., 50 μs./DIV.
Condition	Engine switch on (IG), shift lever in R

HINT:

The video waveform changes according to the image sent by the television camera assembly.
The video waveform is constantly output when the engine switch is on (ACC).

*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 TELEVISION CAMERA ASSEMBLY

Back Camera Power Supply Failure (C1621)

Open or Short in Steering Angle Sensor +B (C1625)

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DESCRIPTION The VVT sensor (for intake camshaft) (VV1, VV2 signal) consists of a magnet and MRE (Magneto Resistance Element). The intake camshaft has a timing rotor for the VVT sensor. When the intake camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Back Camera Disconnected (C1622)

Back Camera Power Supply Failure (C1621)

Open or Short in Steering Angle Sensor +B (C1625)

See More:

Toyota Avalon (XX50) 2019-2022 Owners Manual

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual