B1741 – OBD-II DTC

OBD-II DTC B1741 – Mirror Passenger Vertical Switch Circuit Failure

DTC B1741 meaning

DTC B1741 refers to a fault in the passenger mirror’s vertical 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 vertical movement of the passenger side mirror. The code is part of the OBD-II system, which monitors various components and systems in the vehicle for proper operation.

DTC B1741 symptoms

Common symptoms associated with DTC B1741 may include:

• The passenger side mirror does not adjust vertically.
• Intermittent or complete loss of functionality of the mirror adjustment controls.
• Warning lights or messages on the dashboard related to the mirror system.
• Other electrical issues in the vehicle, such as malfunctioning windows or locks.

DTC B1741 causes

Several factors can lead to the occurrence of DTC B1741, including:

• Faulty vertical switch in the passenger mirror.
• Wiring issues, such as frayed or damaged wires in the circuit.
• Corrosion or poor connections in the electrical connectors.
• Malfunctioning body control module (BCM) that manages mirror functions.
• Blown fuses related to the mirror adjustment system.

DTC B1741 seriousness

The seriousness of DTC B1741 can vary. While it may not affect the vehicle’s overall drivability, it can impact the driver’s ability to adjust the passenger mirror for optimal visibility. This can pose a safety risk, especially when changing lanes or merging. Therefore, it is advisable to address this issue promptly to ensure safe driving conditions.

How to diagnose DTC B1741

To diagnose DTC B1741, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1741 code.
2. Inspect the passenger mirror vertical switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion or damage.
4. Test the vertical switch using a multimeter to ensure it is functioning correctly.
5. Examine the body control module for any faults or error codes.
6. Inspect related fuses and replace any that are blown.

How to fix DTC B1741 step-by-step instructions

To fix DTC B1741, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Remove the passenger side mirror cover to access the vertical switch.
3. Inspect and replace the vertical switch if it is found to be faulty.
4. Repair or replace any damaged wiring or connectors in the circuit.
5. Check and replace any blown fuses related to the mirror adjustment system.
6. Reconnect the battery and test the mirror adjustment to ensure proper functionality.
7. Use the OBD-II scanner to clear the DTC and verify that it does not return.

How to erase DTC B1741

To erase DTC B1741, 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 “Erase Codes” or “Clear DTCs” option on the scanner.
4. Follow the prompts to clear the trouble code from the vehicle’s memory.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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