Lexus NX: Back Camera Power Supply Failure (C1621)

DESCRIPTION

This DTC is stored if the parking assist ECU determines that the input/output signal communication with the rear television camera assembly is abnormal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1621

Back Camera Power Supply Failure

Rear television camera assembly power supply malfunction

  • Harness or connector
  • Rear television camera assembly
  • Parking assist ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When "!" mark is displayed on the multi-display assembly after the cable is disconnected from the negative (-) auxiliary 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 - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the P45 parking assist ECU connector.

(b) Disconnect the Y25 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

P45-33 (CB+) - Y25-6 (CB+)

Always

Below 1 Ω

P45-32 (CGND) - Y25-5 (CGND)

Always

Below 1 Ω

P45-33 (CB+) or Y25-6 (CB+) - Body ground

Always

10 kΩ or higher

P45-32 (CGND) or Y25-5 (CGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK PARKING ASSIST ECU (CB+, CGND)

(a) Disconnect the rear television camera assembly.

*a

Component with harness connected

(Parking Assist ECU)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P45-32 (CGND) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

P45-33 (CB+) - P45-32 (CGND)

Power switch on (IG)

5.5 to 7.05 V

P45-33 (CB+) - P45-32 (CGND)

Power switch off

Below 1 V

OK

REPLACE REAR TELEVISION CAMERA ASSEMBLY

NG

REPLACE PARKING ASSIST ECU

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