B1335 – OBD-II DTC

OBD-II DTC B1335 – Door Ajar RR Circuit Failure

DTC B1335 meaning

DTC B1335 refers to a fault in the Door Ajar Rear Right Circuit. This diagnostic trouble code indicates that the vehicle’s onboard diagnostic system has detected an issue with the electrical circuit responsible for monitoring the rear right door’s open or closed status. The system is designed to alert the driver if a door is ajar, and a failure in this circuit can prevent the proper functioning of this feature.

DTC B1335 symptoms

Common symptoms associated with DTC B1335 may include:

• Illumination of the dashboard warning light for door ajar.
• Inconsistent or false alerts indicating the rear right door is open when it is closed.
• Failure of the interior lights to turn off when the rear right door is closed.
• Possible issues with the vehicle’s locking system, particularly for the rear right door.

DTC B1335 causes

Several factors can lead to the occurrence of DTC B1335, including:

• Faulty door ajar switch in the rear right door.
• Wiring issues, such as frayed or damaged wires in the door harness.
• Corrosion or poor connections at the door switch or within the wiring harness.
• Malfunctioning Body Control Module (BCM) that fails to interpret the signals correctly.

DTC B1335 seriousness

The seriousness of DTC B1335 can vary. While it may not pose an immediate safety risk, it can lead to inconvenience and potential security issues. If the vehicle’s locking system is affected, it may not secure properly. Additionally, the constant warning light can be distracting for the driver. It is advisable to address this issue promptly to ensure the vehicle’s systems function correctly.

How to diagnose DTC B1335

To diagnose DTC B1335, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the rear right door ajar switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion or damage.
4. Test the door ajar switch with a multimeter to ensure it operates correctly.
5. Examine the Body Control Module (BCM) for any faults or software issues.

How to fix DTC B1335 step-by-step instructions

To fix DTC B1335, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and replace the door ajar switch if it is found to be faulty.
3. Repair or replace any damaged wiring or connectors in the door harness.
4. Clean any corrosion found on connectors and ensure all connections are secure.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the system by opening and closing the rear right door to ensure the warning light functions correctly.

How to erase DTC B1335

To erase DTC B1335, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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