Toyota Avalon Service & Repair Manual: Back Camera Power Supply Failure (C1621)

Toyota Avalon Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Parking Assist Monitor System(for Gasoline Model) / Back Camera Power Supply Failure (C1621)

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1621	Back Camera Power Supply Failure	Television camera assembly power supply failure	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
G2-27 (CGND) - P19-5 (CGND)	Always	Below 1 Ω
G2-30 (CA+) or P19-6 (CB+) - 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
G2-27 (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 TELEVISION CAMERA ASSEMBLY

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

ECU Malfunction (C1611)

Back Camera Disconnected (C1622)

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Toyota Avalon Service & Repair Manual: Back Camera Power Supply Failure (C1621)

ECU Malfunction (C1611)

Back Camera Disconnected (C1622)

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