Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Back Camera Current Malfunction (C1621)
DESCRIPTION
DTC C1621 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 Current Malfunction | Rear television camera assembly power supply malfunction |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When "!" is displayed on the multi-display assembly after the cable is disconnected from the negative (-) battery terminal, correct the steering angle neutral point.
Click here
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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.
Click here
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR TELEVISION CAMERA ASSEMBLY) |
(a) Disconnect the J158 parking assist ECU 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 |
|---|---|---|
| J158-33 (CB+) - Z11-6 (CB+) | Always | Below 1 Ω |
| J158-32 (CGND) - Z11-5 (CGND) | Always | Below 1 Ω |
| J158-33 (CB+) or Z11-6 (CB+) - Body ground | Always | 10 kΩ or higher |
| J158-32 (CGND) or Z11-5 (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) Connect the J158 parking assist ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J158-32 (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 |
|---|---|---|
| J158-33 (CB+) - J158-32 (CGND) | Engine switch on (IG) | 5.5 to 7.05 V |
| OK | | REPLACE REAR TELEVISION CAMERA ASSEMBLY |
| NG | | REPLACE PARKING ASSIST ECU |
ECU Malfunction (C1614)
DESCRIPTION This DTC is stored if the parking assist ECU judges that there is an internal malfunction as a result of its self check. HINT: The parking assist ECU stores different types of information ...
Back Camera Feedback Malfunction (C1622)
DESCRIPTION DTC C1622 is stored if the parking assist ECU judges as a result of its self check that the signals or signal lines between the parking assist ECU and the rear television camera assembly a ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Smart Access System With Push-button Start (for Start Function): How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use these procedures to troubleshoot the smart access system with push-button start (for Start Function).
*: Use the Techstream.
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NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT:
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Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Dynamic Torque Control Awd System: Linear Solenoid Power Supply System Malfunction (C120C)
DESCRIPTION This DTC is output by the 4WD ECU assembly if a malfunction occurs in the linear solenoid power supply system. DTC No. Detection Item DTC Detection Condition Trouble Area C120C Linear Solenoid Power Supply System Malfunction
When the 4WD relay is operating, the 4WD re ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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