WOMS
B code body Medium severity

B2599 Tailgate Release Open Circuit

The OBD2 code B2599 indicates a malfunction in the tailgate release system, specifically an open circuit condition, which means there is a break in the electrical circuit that controls the tailgate release mechanism

Definition

The OBD2 code B2599 indicates a malfunction in the tailgate release system, specifically an open circuit condition, which means there is a break in the electrical circuit that controls the tailgate release mechanism

Common causes

  • Faulty tailgate release switch
  • Damaged wiring or connectors
  • Open circuit in the tailgate release circuit
  • Defective body control module (BCM)
  • Poor ground connection
  • Corroded terminals
  • Malfunctioning tailgate latch assembly

Common misdiagnoses

  • Faulty tailgate release switch
  • Damaged wiring or connectors
  • Malfunctioning body control module (BCM)
  • Defective tailgate latch assembly
  • Issues with the power supply or ground connections
  • Faulty key fob or remote entry system
  • Incorrectly programmed or configured vehicle settings

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information related to the tailgate release system and wiring diagrams

  2. 2. Inspect the Tailgate Release Switch

  3. 3. Check the tailgate release switch for any visible damage or wear

  4. 4. Test the switch for continuity using a multimeter. If the switch is faulty, it may need to be replaced

  5. 5. Examine Wiring and Connectors

  6. 6. Inspect the wiring harness and connectors associated with the tailgate release system for any signs of damage, corrosion, or loose connections

  7. 7. Repair or replace any damaged wires or connectors

  8. 8. Check the Tailgate Release Actuator

  9. 9. Test the tailgate release actuator for proper operation. If the actuator is not functioning, it may need to be replaced

  10. 10. Ensure that the actuator is receiving power when the switch is activated

  11. 11. Inspect Fuses and Relays

  12. 12. Check the relevant fuses and relays in the fuse box that control the tailgate release system. Replace any blown fuses or faulty relays

  13. 13. Scan for Additional Codes

  14. 14. Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

  15. 15. Perform a Visual Inspection

  16. 16. Look for any signs of physical obstruction or damage around the tailgate area that could affect the release mechanism

  17. 17. Reset the Code

  18. 18. After performing repairs, clear the trouble code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  19. 19. Consult a Professional

  20. 20. If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B2599 code