B1759 – OBD-II DTC

OBD-II DTC B1759 – Seat Driver Rear Down Circuit Short To Battery

DTC B1759 meaning

DTC B1759 refers to a diagnostic trouble code indicating a short circuit in the driver rear seat down circuit, which is part of the power seat system. This code is triggered when the vehicle’s onboard diagnostic system detects that the circuit is shorted to battery voltage, meaning there is an unintended connection that allows current to flow continuously, potentially causing malfunction in the seat adjustment feature.

DTC B1759 symptoms

Common symptoms associated with DTC B1759 may include:

• The driver rear seat may not move down or function properly.
• Other seat adjustment functions may be affected.
• The vehicle’s warning lights may illuminate on the dashboard.
• In some cases, the seat may be stuck in a particular position.

DTC B1759 causes

Several factors can lead to the occurrence of DTC B1759, including:

• A damaged or frayed wiring harness in the seat adjustment circuit.
• Corrosion or poor connections at the seat motor or control module.
• Faulty seat motor or actuator that is drawing excessive current.
• Issues with the power seat switch or control module.

DTC B1759 seriousness

DTC B1759 is considered a moderate to serious issue. While it may not affect the vehicle’s overall drivability, it can lead to safety concerns if the seat cannot be adjusted properly. Additionally, continued operation with this code may cause further damage to the seat adjustment system or related components.

How to diagnose DTC B1759

To diagnose DTC B1759, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1759 code.
2. Inspect the wiring and connectors related to the driver rear seat adjustment circuit for any visible damage or corrosion.
3. Test the seat motor and actuator for proper operation and check for any signs of excessive current draw.
4. Examine the power seat switch for functionality and ensure it is not stuck or damaged.
5. Check the vehicle’s wiring diagrams to trace the circuit and identify any potential shorts to battery voltage.

How to fix DTC B1759 step-by-step instructions

To fix DTC B1759, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors in the driver rear seat adjustment circuit.
3. Replace any faulty components, such as the seat motor or power seat switch, if necessary.
4. Reconnect all connectors and ensure they are secure and free of corrosion.
5. Reconnect the vehicle’s battery and clear the DTC using an OBD-II scanner.
6. Test the seat adjustment functions to ensure they operate correctly.

How to erase DTC B1759

To erase DTC B1759, 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 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 indicate that the codes have been cleared.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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