B1733: Mirror Driver Vertical Switch Circuit Failure

Definition

The OBD2 code B1733 indicates a malfunction in the vertical switch circuit of the mirror driver, which may affect the operation of the side mirror adjustments

Common causes

Faulty mirror switch
Damaged wiring or connectors
Short circuit in the circuit
Open circuit in the circuit
Defective mirror motor
Corroded terminals
Poor ground connection
Malfunctioning body control module (BCM)

Common misdiagnoses

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

Troubleshooting steps

1. Check for Additional Codes

Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues
2. Inspect the Mirror Switch
3. Remove the mirror switch from the vehicle
4. Inspect the switch for any visible damage, corrosion, or wear
5. Test the switch for continuity using a multimeter. Ensure that it functions correctly in all positions
6. Examine Wiring and Connectors
7. Inspect the wiring harness and connectors associated with the mirror switch and the mirror motor
8. Look for frayed wires, loose connections, or corrosion that could affect the circuit
9. Repair or replace any damaged wiring or connectors
10. Test the Mirror Motor
11. If the switch appears to be functioning correctly, test the mirror motor itself
12. Apply direct power to the motor to see if it operates. If it does not, the motor may be faulty and require replacement
13. Check for Ground Issues
14. Ensure that the ground connections for the mirror system are secure and free of corrosion
15. A poor ground can lead to circuit failures and erratic behavior
16. Inspect the Body Control Module (BCM)
17. The BCM controls various electrical functions in the vehicle, including power mirrors
18. Check for any faults in the BCM that could be affecting the mirror switch operation
19. If necessary, reprogram or replace the BCM
20. Look for Short Circuits
21. Use a multimeter to check for short circuits in the wiring related to the mirror switch and motor
22. A short circuit can cause the system to malfunction and trigger the B1733 code
23. Clear the Code and Test Drive
24. After performing repairs, clear the trouble code using the OBD-II scanner
25. Take the vehicle for a test drive to see if the code reappears
26. Consult Repair Manual
27. Refer to the vehicle's service manual for specific wiring diagrams and troubleshooting procedures related to the mirror system
28. Seek Professional Help
29. If the issue persists after performing these steps, consider consulting a professional mechanic or an automotive electrician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1733 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect the Mirror Switch

3. Remove the mirror switch from the vehicle

4. Inspect the switch for any visible damage, corrosion, or wear

5. Test the switch for continuity using a multimeter. Ensure that it functions correctly in all positions

6. Examine Wiring and Connectors

7. Inspect the wiring harness and connectors associated with the mirror switch and the mirror motor

8. Look for frayed wires, loose connections, or corrosion that could affect the circuit

9. Repair or replace any damaged wiring or connectors

10. Test the Mirror Motor

11. If the switch appears to be functioning correctly, test the mirror motor itself

12. Apply direct power to the motor to see if it operates. If it does not, the motor may be faulty and require replacement

13. Check for Ground Issues

14. Ensure that the ground connections for the mirror system are secure and free of corrosion

15. A poor ground can lead to circuit failures and erratic behavior

16. Inspect the Body Control Module (BCM)

17. The BCM controls various electrical functions in the vehicle, including power mirrors

18. Check for any faults in the BCM that could be affecting the mirror switch operation

19. If necessary, reprogram or replace the BCM

20. Look for Short Circuits

21. Use a multimeter to check for short circuits in the wiring related to the mirror switch and motor

22. A short circuit can cause the system to malfunction and trigger the B1733 code

23. Clear the Code and Test Drive

24. After performing repairs, clear the trouble code using the OBD-II scanner

25. Take the vehicle for a test drive to see if the code reappears

26. Consult Repair Manual

27. Refer to the vehicle's service manual for specific wiring diagrams and troubleshooting procedures related to the mirror system

28. Seek Professional Help

29. If the issue persists after performing these steps, consider consulting a professional mechanic or an automotive electrician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1733 code