Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Back Camera Power Supply Failure (C1621)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1621

Back Camera Power Supply Failure

Rear television camera assembly power supply failure

  • Harness or connector
  • Rear television camera assembly
  • Multi-display assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When "!" mark is displayed on the multi-display assembly after disconnecting the cable 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 parking assist monitor system may be needed.

    Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the J56 multi-display assembly connector.

(b) Disconnect the Z11 rear television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J56-10 (CA+) - Z11-6 (CB+)

Always

Below 1 Ω

J56-21 (CGND) - Z11-5 (CGND)

Always

Below 1 Ω

J56-10 (CA+) or Z11-6 (CB+) - Body ground

Always

10 kΩ or higher

J56-21 (CGND) or Z11-5 (CGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

INSPECT MULTI-DISPLAY ASSEMBLY (CA+)

(a) Reconnect the J56 multi-display assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J56-10 (CA+) - Body ground

Engine switch on (ACC)

5.5 to 7.05 V

*a

Component with harness connected

(Multi-display Assembly)

OK

REPLACE REAR TELEVISION CAMERA ASSEMBLY

NG

REPLACE MULTI-DISPLAY ASSEMBLY

    ECU Malfunction (C1611)
    DESCRIPTION This DTC is stored if the rear television camera assembly judges that there is an internal malfunction as a result of its self check. HINT: The rear television camera assembly stores diffe ...

    Open or Short in Steering Angle Sensor +B (C1625)
    DESCRIPTION This DTC is stored if the rear television camera assembly receives a signal via CAN communication from the steering sensor that indicates a power supply problem. DTC No. Detection Ite ...

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