B1726 – OBD-II DTC

OBD-II DTC B1726 – Seat Driver Rear Up Switch Circuit Open

DTC B1726 meaning

DTC B1726 refers to a diagnostic trouble code indicating an issue with the seat driver rear up switch circuit. This code is triggered when the vehicle’s onboard diagnostic system detects an open circuit in the switch that controls the upward movement of the driver’s rear seat. The open circuit can prevent the seat from adjusting properly, affecting comfort and safety.

DTC B1726 symptoms

Common symptoms associated with DTC B1726 may include:

• The driver’s rear seat may not move up or down.
• Warning lights may illuminate on the dashboard.
• Other seat adjustment functions may be affected.
• Inconsistent operation of the seat adjustment switch.

DTC B1726 causes

Several factors can lead to the triggering of DTC B1726, including:

• A faulty seat driver rear up switch.
• Wiring issues, such as frayed or broken wires.
• Corrosion or poor connections in the switch circuit.
• Faulty seat control module.

DTC B1726 seriousness

DTC B1726 is considered a moderate issue. While it may not prevent the vehicle from operating, it can affect the driver’s comfort and safety. If left unaddressed, it may lead to further electrical issues or complications with other seat functions.

How to diagnose DTC B1726

To diagnose DTC B1726, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the seat driver rear up switch for physical damage.
3. Check the wiring and connectors for signs of wear, corrosion, or disconnection.
4. Test the switch for continuity using a multimeter.
5. Examine the seat control module for faults or error codes.

How to fix DTC B1726 step-by-step instructions

To fix DTC B1726, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety.
2. Inspect and repair any damaged wiring or connectors in the seat adjustment circuit.
3. If the switch is faulty, replace it with a new one.
4. Reconnect all connectors and ensure they are secure.
5. Reconnect the battery and test the seat adjustment function.
6. Use an OBD-II scanner to clear the DTC and verify that it does not return.

How to erase DTC B1726

To erase DTC B1726, 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 trouble codes section on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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