B1683: Mirror Driver/Passenger Switch Circuit Failure

Definition

The OBD2 code B1683 indicates a malfunction in the mirror driver or passenger switch circuit, which may affect the operation of the side mirrors

Common causes

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

Common misdiagnoses

Faulty window switch
Wiring issues
Defective mirror motor
Body control module failure
Short circuit in the wiring harness
Faulty door control module
Incorrectly installed or damaged mirror assembly

Troubleshooting steps

1. Check for Additional Codes

Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues
2. Inspect the Wiring and Connectors
3. Visually inspect the wiring harness and connectors associated with the mirror switch and mirrors. Look for any signs of damage, corrosion, or loose connections
4. Pay special attention to the wiring that runs through the door, as this area is prone to wear and tear
5. Test the Mirror Switch
6. Remove the mirror switch from the vehicle and test it with a multimeter to ensure it is functioning correctly. Check for continuity in the switch when it is activated
7. If the switch is faulty, replace it
8. Check the Power and Ground
9. Use a multimeter to check for power and ground at the mirror switch connector. Ensure that the switch is receiving the correct voltage and that the ground is solid
10. If there is no power, trace the wiring back to the fuse box and check for blown fuses or damaged wiring
11. Inspect the Mirrors
12. Check the mirror motors for functionality. If the mirrors are not responding, they may be faulty and need replacement
13. If the mirrors are heated or have additional features, ensure those functions are also working properly
14. Check for Short Circuits
15. Inspect the circuit for any short circuits that may be causing the issue. This can be done by checking the resistance in the wiring and looking for any unintended connections
16. Look for Water Intrusion
17. Water can cause electrical issues, especially in door assemblies. Check for any signs of moisture or water damage in the door panel or around the mirror assembly
18. Reset the Code
19. After performing any repairs or replacements, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns
20. Consult a Professional
21. If the issue persists after performing these steps, it may be necessary to consult 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 B1683 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect the Wiring and Connectors

3. Visually inspect the wiring harness and connectors associated with the mirror switch and mirrors. Look for any signs of damage, corrosion, or loose connections

4. Pay special attention to the wiring that runs through the door, as this area is prone to wear and tear

5. Test the Mirror Switch

6. Remove the mirror switch from the vehicle and test it with a multimeter to ensure it is functioning correctly. Check for continuity in the switch when it is activated

7. If the switch is faulty, replace it

8. Check the Power and Ground

9. Use a multimeter to check for power and ground at the mirror switch connector. Ensure that the switch is receiving the correct voltage and that the ground is solid

10. If there is no power, trace the wiring back to the fuse box and check for blown fuses or damaged wiring

11. Inspect the Mirrors

12. Check the mirror motors for functionality. If the mirrors are not responding, they may be faulty and need replacement

13. If the mirrors are heated or have additional features, ensure those functions are also working properly

14. Check for Short Circuits

15. Inspect the circuit for any short circuits that may be causing the issue. This can be done by checking the resistance in the wiring and looking for any unintended connections

16. Look for Water Intrusion

17. Water can cause electrical issues, especially in door assemblies. Check for any signs of moisture or water damage in the door panel or around the mirror assembly

18. Reset the Code

19. After performing any repairs or replacements, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

20. Consult a Professional

21. If the issue persists after performing these steps, it may be necessary to consult 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 B1683 code