WOMS
B code body Medium severity

B1529 Memory Set Switch Circuit Short To Battery

The OBD2 code B1529 indicates a fault in the memory set switch circuit, specifically that it is shorted to battery, which means there is an electrical short causing the circuit to receive constant power

Definition

The OBD2 code B1529 indicates a fault in the memory set switch circuit, specifically that it is shorted to battery, which means there is an electrical short causing the circuit to receive constant power

Common causes

  • Shorted wiring or connectors
  • Faulty memory set switch
  • Corroded or damaged terminals
  • Malfunctioning body control module (BCM)
  • Grounding issues
  • Incorrectly installed aftermarket accessories
  • Water intrusion or moisture damage

Common misdiagnoses

  • Faulty memory seat switch
  • Wiring harness issues
  • Shorted wiring
  • Faulty body control module (BCM)
  • Defective power seat motor
  • Ground connection problems
  • Incorrectly installed aftermarket accessories

Troubleshooting steps

  1. 1. Visual Inspection

    Wiring and Connectors: Inspect the wiring harness and connectors related to the memory set switch. Look for any signs of damage, fraying, or corrosion

  2. 2. Switch Condition

    Check the memory set switch itself for any physical damage or signs of wear

  3. 3. Check for Short Circuits

    Multimeter Testing: Use a multimeter to check for continuity in the memory set switch circuit. Disconnect the switch and measure resistance between the circuit wires. A low resistance reading may indicate a short to battery

  4. 4. Inspect Ground Connections

    Ensure that all ground connections are secure and free of corrosion

  5. 5. Scan Tool Diagnosis

    Read Codes: Use an OBD-II scanner to confirm the presence of the B1529 code and check for any additional codes that may provide more context

  6. 6. Live Data Monitoring

    Monitor the live data related to the memory set switch to see if it behaves as expected when the switch is activated

  7. 7. Check Power Supply

    Voltage Check: With the ignition on, check the voltage at the memory set switch connector. Ensure it is receiving the correct voltage as specified in the vehicle’s service manual

  8. 8. Battery Voltage

    Ensure the vehicle's battery is in good condition and fully charged

  9. 9. Inspect Related Components

    Memory Module: If applicable, check the memory module or control unit that manages the memory seat functions for faults

  10. 10. Other Switches

    If the memory set switch is part of a larger control system (like a driver’s door module), inspect other related switches and components

  11. 11. Repair or Replace

    Repair Wiring: If any damaged wiring or connectors are found, repair or replace them as necessary

  12. 12. Replace Switch

    If the memory set switch is faulty, replace it with a new one

  13. 13. Clear Codes and Test Drive

    After making repairs, clear the trouble codes using the OBD-II scanner

  14. 14. Take the vehicle for a test drive to see if the code returns

  15. 15. Professional Help

    If you are unable to resolve the issue, consider seeking help from a professional mechanic or an automotive electrician who has experience with electrical systems. By following these steps, you should be able to diagnose and potentially resolve the B1529 code related to the memory set switch circuit