B2349 – OBD-II DTC

OBD-II DTC B2349 – Mirror Switch Reference Voltage Negative Common Open Circuit

DTC B2349 meaning

DTC B2349 refers to a diagnostic trouble code indicating an issue with the mirror switch reference voltage. Specifically, it signifies a negative common open circuit in the mirror switch circuit. This means that the circuit responsible for providing reference voltage to the mirror switch is not functioning correctly, which can affect the operation of the vehicle’s mirrors.

DTC B2349 symptoms

Common symptoms associated with DTC B2349 may include:

• Inoperable side mirrors
• Mirror adjustment functions not working
• Warning lights on the dashboard
• Intermittent or erratic mirror movement

DTC B2349 causes

Several factors can lead to the occurrence of DTC B2349, including:

• Faulty mirror switch
• Damaged wiring or connectors in the mirror circuit
• Short circuits or open circuits in the electrical system
• Issues with the body control module (BCM)

DTC B2349 seriousness

DTC B2349 is considered a moderate issue. While it may not immediately affect the vehicle’s drivability, it can compromise safety by preventing proper mirror adjustments. This can lead to visibility issues while driving, increasing the risk of accidents.

How to diagnose DTC B2349

To diagnose DTC B2349, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the mirror switch for physical damage or wear.
3. Check the wiring and connectors for continuity and signs of damage.
4. Test the mirror switch with a multimeter to ensure it is functioning correctly.
5. Examine the body control module for any faults or issues.

How to fix DTC B2349 step-by-step instructions

To fix DTC B2349, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety.
2. Inspect and repair any damaged wiring or connectors in the mirror switch circuit.
3. Replace the mirror switch if it is found to be faulty.
4. Reconnect the battery and clear the DTC using an OBD-II scanner.
5. Test the mirror adjustment functions to ensure they are working properly.

How to erase DTC B2349

To erase DTC B2349, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase the trouble codes.
5. Confirm the action and wait for the scanner to complete the process.