WOMS
B code body Medium severity

B1773 Mirror Driver Up Circuit Failure

The OBD2 code B1773 indicates a malfunction in the mirror driver up circuit, which typically means there is a failure in the electrical circuit responsible for controlling the upward movement of the vehicle's side mirror

Definition

The OBD2 code B1773 indicates a malfunction in the mirror driver up circuit, which typically means there is a failure in the electrical circuit responsible for controlling the upward movement of the vehicle's side mirror

Common causes

  • Faulty mirror driver module
  • Damaged wiring or connectors
  • Short circuit in the mirror circuit
  • Open circuit in the mirror circuit
  • Corroded or loose connections
  • Malfunctioning power supply to the mirror
  • Defective mirror motor or actuator
  • Software or calibration issues in the vehicle's control module

Common misdiagnoses

  • Faulty mirror switch
  • Wiring issues or shorts in the harness
  • Defective mirror motor
  • Malfunctioning body control module (BCM)
  • Incorrectly diagnosed window regulator issues
  • Problems with the vehicle's electrical system or battery
  • Software or programming errors in the vehicle's computer systems

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

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

  2. 2. Inspect the Mirror Switch

  3. 3. Test the mirror control switch for proper operation

  4. 4. Check for any signs of damage or wear

  5. 5. Ensure that the switch is making good contact and is not stuck

  6. 6. Examine the Wiring and Connectors

  7. 7. Inspect the wiring harness leading to the mirror for any signs of damage, fraying, or corrosion

  8. 8. Check the connectors for loose connections or corrosion. Clean and secure any connections as necessary

  9. 9. Test the Mirror Motor

  10. 10. If accessible, test the mirror motor directly by applying power to it to see if it operates

  11. 11. If the motor does not work when powered directly, it may need to be replaced

  12. 12. Check for Short Circuits

  13. 13. Use a multimeter to check for short circuits in the wiring

  14. 14. Look for continuity issues or shorts to ground that could be causing the failure

  15. 15. Inspect the Body Control Module (BCM)

  16. 16. The BCM controls many electrical functions in the vehicle, including the mirrors

  17. 17. Check for any fault codes in the BCM and ensure it is functioning properly

  18. 18. Clear the Codes

  19. 19. After performing any repairs or adjustments, clear the OBD-II codes using a scan tool and see if the code returns

  20. 20. If the code does not return, the issue may have been resolved

  21. 21. Consult a Professional

  22. 22. If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with automotive electrical systems

  23. 23. Consider Environmental Factors

  24. 24. Sometimes, environmental factors such as moisture or extreme temperatures can affect electrical components. Ensure that the mirror assembly is not exposed to conditions that could cause failure. By following these steps, you should be able to identify and potentially resolve the issue related to the B1773 code. Always ensure safety precautions are taken when working with electrical systems in vehicles