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 |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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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.
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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.
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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 | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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| 2. | CHECK PARKING ASSIST ECU (CB+, CGND) |
| (a) Disconnect the rear television camera assembly. |
|
(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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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
Click here HINT:
Use the table below to help determine the cau
