B1759 Seat Driver Rear Down Circuit Short to Battery

The B1759 trouble code indicates a problem within the driver's seat rear down circuit, specifically a short to battery voltage. This code means the seat control module detects an unexpected voltage level in the circuit responsible for lowering the rear portion of the driver's seat. Addressing this issue promptly is crucial to ensure the proper functioning of the power seat, avoid potential electrical damage, and maintain driver comfort and safety.

Comprehensive Information on B1759: Seat Driver Rear Down Circuit Short to Battery

Detailed Explanations

Definition of B1759: This code specifically pinpoints a situation where the electrical circuit controlling the downward movement of the rear section of the driver's seat is receiving an unintended and excessive amount of voltage, indicating a short to the battery's positive terminal. This disrupts the normal operation of the seat motor and can lead to further issues.

Symptoms: The most obvious symptom is the inability to adjust the seat downwards at the rear. You might also experience erratic seat behavior, like the seat moving on its own, or a blown fuse that protects the seat's electrical circuit. In some vehicles, the check engine light might illuminate, and a persistent short can drain the battery.

Affected Components: The primary components involved are the driver's seat rear down motor itself, the seat control module (SCM) which governs the seat's movements, the wiring harness that connects these components, the power supply wiring to the SCM, and the relevant fuses that protect the circuit. Any of these can be the source of the problem.

Diagnostic Procedure: A thorough diagnosis begins with a visual inspection of all wiring and connectors for any signs of damage, corrosion, or looseness. A multimeter is used to check the voltage and resistance of the circuit, comparing readings to the vehicle's wiring diagram. A scan tool helps read the DTCs and provide live data from the SCM. Fuse inspection is crucial, and component testing (motor, SCM) may be necessary.

Common Repair Steps: Repairing or replacing damaged wiring is a common fix. If the seat motor is faulty, it will need replacement. Similarly, a malfunctioning SCM requires replacement. Cleaning or replacing corroded connectors can restore proper electrical contact. Blown fuses must be replaced with the correct amperage rating. Finally, re-routing the wiring can prevent future damage from chafing or pinching.

Tools Required: Essential tools include a multimeter for electrical testing, a scan tool to read diagnostic codes, wiring diagrams for reference, wire strippers and crimpers for wiring repairs, a soldering iron (optional for certain wiring repairs), a test light for basic circuit testing, and a socket set and screwdrivers for accessing components.

Related DTCs: The B1759 code might be accompanied by other seat motor related codes, indicating problems with other seat adjustments. Power seat circuit codes, body control module (BCM) related codes, and CAN bus communication errors (if applicable) can also provide clues about the underlying issue.

Severity: The severity of a B1759 code is moderate to high. While it might not immediately disable the vehicle, the inability to properly adjust the seat can affect driver comfort and potentially compromise safety, especially on long drives. Furthermore, a short to battery can cause electrical damage and lead to battery drain if left unaddressed.

Estimated Repair Cost: The repair cost varies widely based on the root cause. A simple wiring repair might be relatively inexpensive, costing only a few dollars for parts and an hour or two of labor. However, replacing a faulty seat motor or seat control module can be significantly more expensive, potentially ranging from $100 to over $800, depending on the vehicle model, parts availability, and labor rates.

Frequently Asked Questions

• What does the B1759 code mean? The B1759 code indicates a short to battery voltage in the driver's seat rear down circuit, meaning there's an unintended electrical connection.

• Can I drive my car with a B1759 code? Yes, you can typically drive your car, but the seat adjustment won't work properly and there's a risk of electrical damage or battery drain.

• What are the common causes of B1759? Common causes include damaged wiring, a faulty seat motor, a failing seat control module, and corroded connectors.

• How do I fix a B1759 code? Diagnosis involves checking wiring, connectors, and components with a multimeter and scan tool, followed by repairing or replacing the faulty part.

• Is B1759 a serious problem? It can be, as it can affect driver comfort, potentially impact safety, and lead to electrical damage or battery drain if not addressed.

Conclusion

The B1759 code, indicating a short to battery in the driver's seat rear down circuit, requires prompt attention to ensure proper seat function, driver comfort, and prevent potential electrical issues. A systematic diagnostic approach, combined with careful repair or replacement of the faulty components, is key to resolving this problem effectively.