B1743 – OBD-II DTC

OBD-II DTC B1743 – Mirror Passenger Vertical Switch Circuit Short To Battery

DTC B1743 meaning

DTC B1743 refers to a diagnostic trouble code indicating a problem with the passenger side mirror’s vertical switch circuit. Specifically, it signifies a short circuit to battery voltage within the switch circuit, which can prevent the mirror from adjusting properly.

DTC B1743 symptoms

Common symptoms associated with DTC B1743 may include:

• The passenger side mirror not adjusting vertically.
• Inconsistent or erratic movement of the mirror.
• Other electrical issues in the vehicle, such as blown fuses.
• Warning lights illuminated on the dashboard.

DTC B1743 causes

Several factors can lead to the occurrence of DTC B1743, including:

• A short circuit in the wiring harness connected to the mirror switch.
• Faulty mirror switch itself.
• Corrosion or damage in the electrical connectors.
• Issues with the body control module (BCM) that manages the mirror functions.

DTC B1743 seriousness

DTC B1743 is considered a moderate issue. While it may not affect the vehicle’s overall drivability, it can hinder the driver’s ability to adjust the passenger side mirror, which is crucial for safe driving. Ignoring this code may lead to further electrical problems or damage to the mirror adjustment system.

How to diagnose DTC B1743

To diagnose DTC B1743, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1743 code.
2. Inspect the wiring and connectors related to the passenger mirror switch for any visible damage or corrosion.
3. Test the mirror switch for continuity and proper operation.
4. Check for any blown fuses that may be related to the mirror circuit.
5. Examine the body control module for any faults or issues.

How to fix DTC B1743 step-by-step instructions

To fix DTC B1743, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors associated with the mirror switch.
3. If the mirror switch is faulty, replace it with a new one.
4. Check and replace any blown fuses related to the mirror circuit.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the passenger side mirror to ensure it adjusts properly.

How to erase DTC B1743

To erase DTC B1743, 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 ensure the code does not return.

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