WOMS
B code body Medium severity

B1423 Power Window RR Motor Circuit Open

The OBD2 code B1423 indicates an open circuit in the power window motor for the right rear window, suggesting a potential issue with the wiring or the motor itself

Definition

The OBD2 code B1423 indicates an open circuit in the power window motor for the right rear window, suggesting a potential issue with the wiring or the motor itself

Common causes

  • Faulty power window motor
  • Open circuit in wiring
  • Damaged connectors
  • Blown fuse
  • Faulty window switch
  • Ground connection issues

Common misdiagnoses

  • Faulty power window switch
  • Bad wiring or connectors
  • Defective body control module (BCM)
  • Malfunctioning window regulator
  • Blown fuse
  • Incorrectly diagnosed motor failure
  • Issues with the door harness
  • Problems with the vehicle's central locking system

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

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

  2. 2. Visual Inspection

  3. 3. Inspect the wiring harness and connectors related to the rear right power window motor for any signs of damage, corrosion, or loose connections

  4. 4. Check the power window switch for any physical damage or wear

  5. 5. Test the Power Window Switch

  6. 6. Use a multimeter to test the power window switch for continuity. Ensure that it is functioning correctly when pressed in both directions (up and down)

  7. 7. Inspect the Power Window Motor

  8. 8. Remove the door panel to access the rear right power window motor

  9. 9. Check the motor for any visible damage or obstructions

  10. 10. Test the motor directly by applying power to it (using a known good power source) to see if it operates

  11. 11. Check for Power and Ground

  12. 12. Use a multimeter to check for voltage at the power window motor connector when the switch is activated. You should see battery voltage (typically around 12V)

  13. 13. Check for a good ground connection at the motor. If there is no power or ground, trace the wiring back to the switch and the fuse box

  14. 14. Inspect Fuses and Relays

  15. 15. Check the fuse associated with the power window circuit. Replace any blown fuses

  16. 16. If applicable, check the relay for the power window system to ensure it is functioning properly

  17. 17. Scan for Additional Codes

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

  19. 19. Check for Short Circuits

  20. 20. Inspect the wiring for any signs of short circuits or breaks that could cause an open circuit condition

  21. 21. Test the Body Control Module (BCM)

  22. 22. If all other components check out, the issue may lie within the BCM. Ensure that it is functioning correctly and that there are no software issues

  23. 23. Clear the Code and Test Drive

  24. 24. 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. If you are not comfortable performing these steps or if the issue persists after troubleshooting, it may be best to consult a professional mechanic for further diagnosis and repair