Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Back Camera Power Supply Failure (C1621)

Toyota Avalon (XX50) 2019-2022 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.

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

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
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G2-30 (CA+) - G2-27 (CGND)

Engine switch on (ACC)

5.5 to 7.05 V
OK

REPLACE TELEVISION CAMERA ASSEMBLY

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    ECU Malfunction (C1611)

    Back Camera Disconnected (C1622)

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