B1759 – Seat Driver Rear Down Circuit Short To Battery

The ODBII code B1759 indicates a short circuit in the driver rear seat down adjustment circuit, meaning there is an electrical fault causing the circuit to connect directly to the battery, potentially leading to improper seat operation.

The severity of ODBII code B1759 is moderate.

Common Causes For: B1758 Seat Driver Rear Down Circuit Open

• Shorted wiring or connectors
• Faulty seat motor
• Damaged seat control module
• Corroded or loose electrical connections
• Faulty power supply to the seat circuit
• Malfunctioning switch or control panel

Common misdiagnosis for B1759 Seat Driver Rear Down Circuit Short To Battery

• Faulty seat switch
• Damaged wiring harness
• Defective seat motor
• Malfunctioning body control module (BCM)
• Incorrectly installed seat
• Grounding issues
• Faulty connectors or terminals

Common Troubleshooting Steps

The OBD-II code B1759 indicates a problem with the seat driver’s rear down circuit, specifically a short to battery. This code is often related to issues in the seat adjustment system, which can include wiring, connectors, or the seat motor itself. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Visual Inspection: **Wiring and Connectors: Inspect the wiring harness and connectors associated with the seat adjustment system for any visible damage, fraying, or corrosion. Pay special attention to areas where the wires may be pinched or exposed.
• **Seat Motor: Check the seat motor for any signs of damage or wear.
• Check for Short Circuits: **Multimeter Testing: Use a multimeter to check for continuity in the wiring. Disconnect the seat motor and measure the resistance between the circuit and ground. A low resistance reading may indicate a short to battery.
• **Inspect Ground Connections: Ensure that all ground connections are secure and free of corrosion.
• Test the Seat Motor: **Direct Power Test: If safe to do so, apply direct battery power to the seat motor to see if it operates. If it does not work, the motor may be faulty and need replacement.
• **Check Motor Resistance: Measure the resistance of the motor windings. If the resistance is too low or too high, the motor may be defective.
• Scan for Additional Codes: **Check for Related Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Inspect the Seat Control Module: **Module Functionality: If applicable, check the seat control module for proper operation. This may involve testing the module with a scan tool or replacing it if it is suspected to be faulty.
• Clear Codes and Test Drive: **Clear the Code: After performing the above checks and repairs, clear the trouble code using an OBD-II scanner.
• **Test Drive: Take the vehicle for a test drive to see if the code reappears. Monitor the seat adjustment functions to ensure they are working correctly.
• Consult Service Manual: **Refer to Manufacturer’s Manual: If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures and wiring diagrams related to the seat adjustment system.
• Professional Help: **Seek Professional Assistance: If you are unable to resolve the issue, consider taking the vehicle to a qualified technician or dealership for further diagnosis and repair. By following these steps, you should be able to identify and resolve the issue related to the B1759 code. Always ensure safety precautions are taken when working with electrical systems in vehicles.