Toyota Avalon Service & Repair Manual: 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 parking assist ECU are not normal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

C1621

Back Camera Power Supply Failure

Television camera assembly power supply failure

  • Harness or connector
  • Television camera assembly

Television camera assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When "!" is displayed on the radio and display receiver assembly after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point.

    Click here

  • 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 panoramic view monitor system may be needed.

    Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the K36 parking assist ECU connector.

(b) Disconnect the P7 television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K36-9 (CGND) - P7-5 (CGND)

Always

Below 1 Ω

K36-9 (CGND) or P7-5 (CGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK HARNESS AND CONNECTOR (ACC POWER SUPPLY - BODY GROUND)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P7-6 (CB+) - Body ground

Engine switch on (ACC)

11 to 14 V

OK

REPLACE TELEVISION CAMERA ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    ECU Malfunction (C1614)

    Open or Short Circuit in Back Camera Signal (C1622)

    See More:

    Toyota Avalon Service & Repair Manual > Lane Departure Alert System (w/ Steering Control)(for Hv Model): Terminals Of Ecu
    TERMINALS OF ECU NOTICE: DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed. Do not apply excessive force to the O5 forward recognition camera connector. CHECK FORWARD RECOGNITION CAM ...

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