B1747 – OBD-II DTC

OBD-II DTC B1747 – Mirror Passenger Horizontal Switch Circuit Short To Battery

DTC B1747 meaning

DTC B1747 refers to a diagnostic trouble code indicating a short circuit in the passenger mirror horizontal switch circuit. This code is triggered when the vehicle’s onboard diagnostic system detects that the circuit is shorted to battery voltage, which can prevent the proper functioning of the mirror adjustment controls.

DTC B1747 symptoms

Common symptoms associated with DTC B1747 may include:

• Inability to adjust the passenger side mirror
• Passenger mirror stuck in one position
• Warning lights illuminated on the dashboard
• Other electrical issues in the vehicle

DTC B1747 causes

Several factors can lead to the triggering of DTC B1747, including:

• Faulty mirror switch
• Wiring issues, such as frayed or damaged wires
• Corrosion in the electrical connectors
• Short circuit in the mirror adjustment circuit
• Faulty body control module (BCM)

DTC B1747 seriousness

The seriousness of DTC B1747 can vary. While it may not pose an immediate safety risk, it can lead to reduced visibility if the passenger mirror cannot be adjusted. Additionally, it may indicate underlying electrical issues that could affect other systems in the vehicle.

How to diagnose DTC B1747

To diagnose DTC B1747, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the 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 switch for continuity using a multimeter.
5. Examine the body control module for faults or issues.

How to fix DTC B1747 step-by-step instructions

To fix DTC B1747, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety.
2. Inspect and repair any damaged wiring or connectors related to the mirror switch.
3. Replace the faulty mirror switch if necessary.
4. Reconnect the battery and test the mirror adjustment functionality.
5. Clear the DTC using an OBD-II scanner and perform a test drive to ensure the code does not return.

How to erase DTC B1747

To erase DTC B1747, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu on the scanner.
3. 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 perform a test drive to ensure the code does not reappear.

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