B1737 – OBD-II DTC

OBD-II DTC B1737 – Mirror Driver Horizontal Switch Circuit Failure

DTC B1737 meaning

DTC B1737 refers to a fault in the mirror driver horizontal switch circuit. This diagnostic trouble code indicates that the vehicle’s onboard diagnostic system has detected an issue with the electrical circuit responsible for controlling the horizontal movement of the side mirror. The code is specific to the driver’s side mirror switch and can affect the functionality of the mirror adjustment feature.

DTC B1737 symptoms

Common symptoms associated with DTC B1737 may include:

• Inability to adjust the driver’s side mirror horizontally.
• Mirror position may be stuck or unresponsive.
• Other mirror functions may work, but horizontal adjustment fails.
• Warning lights or messages on the dashboard related to mirror functions.

DTC B1737 causes

Several factors can lead to the triggering of DTC B1737, including:

• Faulty mirror switch or control module.
• Wiring issues such as shorts, opens, or corrosion in the circuit.
• Defective mirror motor that fails to respond to commands.
• Issues with the vehicle’s body control module (BCM) that manages mirror functions.

DTC B1737 seriousness

The seriousness of DTC B1737 can vary based on the vehicle’s use and the driver’s needs. While it may not affect the vehicle’s overall operation, it can compromise safety by limiting visibility adjustments. It is advisable to address this issue promptly to ensure proper mirror functionality and maintain safe driving conditions.

How to diagnose DTC B1737

To diagnose DTC B1737, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1737 code.
2. Inspect the mirror switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion or damage.
4. Test the mirror motor for functionality using a multimeter.
5. Examine the body control module for any fault codes or issues.

How to fix DTC B1737 step-by-step instructions

To fix DTC B1737, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors in the mirror switch circuit.
3. If the mirror switch is faulty, replace it with a new one.
4. Test the mirror motor and replace it if it is not functioning correctly.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the mirror adjustment functions to ensure they are working properly.

How to erase DTC B1737

To erase DTC B1737, 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 option to clear or erase trouble codes on the scanner.
4. Confirm the action to erase the DTC.
5. Disconnect the scanner and start the vehicle to check if the code returns.

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