B1775: Mirror Driver Up Circuit Short To Battery

Definition

The OBD2 code B1775 indicates a fault in the mirror driver's up circuit, specifically a short circuit to the battery, which means there is an electrical issue causing the circuit to continuously receive power

Common causes

Shorted wiring or connectors
Faulty mirror driver module
Damaged mirror motor
Corroded or damaged electrical connections
Malfunctioning switch or control module
Grounding issues
Water intrusion or moisture damage

Common misdiagnoses

Faulty mirror switch
Wiring harness issues
Shorted wiring
Defective mirror motor
Malfunctioning body control module (BCM)
Incorrectly installed or damaged mirror assembly
Battery or charging system problems

Troubleshooting steps

1. Visual Inspection
2. Check the wiring and connectors associated with the mirror assembly for any signs of damage, fraying, or corrosion
3. Inspect the mirror switch for any physical damage or wear
4. Check for Short Circuits
5. Use a multimeter to check for continuity in the mirror driver circuit. Look for any shorts to ground or battery voltage
6. Disconnect the mirror connector and check the resistance of the up circuit wire to ground. It should show infinite resistance (no continuity) if there is no short
7. Test the Mirror Switch
8. With the mirror switch disconnected, test the switch for proper operation. Ensure that it is not stuck or malfunctioning, which could cause a continuous signal to the mirror motor
9. Inspect the Mirror Motor
10. If the wiring and switch are in good condition, the issue may lie within the mirror motor itself. Test the motor by applying direct battery voltage to see if it operates correctly
11. Check for Faulty Components
12. If the mirror motor and switch are functioning properly, check for any other components in the circuit that may be faulty, such as relays or fuses
13. Scan for Additional Codes
14. Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues
15. Repair or Replace
16. Based on your findings, repair any damaged wiring or connectors. If the mirror motor or switch is faulty, replace them as necessary
17. Clear Codes and Test Drive
18. After making repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns
19. If the issue persists, consult the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the mirror system
20. Professional Help
21. If you are unable to resolve the issue, consider seeking assistance from a professional mechanic or automotive technician who has experience with electrical systems. By following these steps, you should be able to identify and resolve the issue related to the B1775 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Visual Inspection

2. Check the wiring and connectors associated with the mirror assembly for any signs of damage, fraying, or corrosion

3. Inspect the mirror switch for any physical damage or wear

4. Check for Short Circuits

5. Use a multimeter to check for continuity in the mirror driver circuit. Look for any shorts to ground or battery voltage

6. Disconnect the mirror connector and check the resistance of the up circuit wire to ground. It should show infinite resistance (no continuity) if there is no short

7. Test the Mirror Switch

8. With the mirror switch disconnected, test the switch for proper operation. Ensure that it is not stuck or malfunctioning, which could cause a continuous signal to the mirror motor

9. Inspect the Mirror Motor

10. If the wiring and switch are in good condition, the issue may lie within the mirror motor itself. Test the motor by applying direct battery voltage to see if it operates correctly

11. Check for Faulty Components

12. If the mirror motor and switch are functioning properly, check for any other components in the circuit that may be faulty, such as relays or fuses

13. Scan for Additional Codes

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

15. Repair or Replace

16. Based on your findings, repair any damaged wiring or connectors. If the mirror motor or switch is faulty, replace them as necessary

17. Clear Codes and Test Drive

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

19. If the issue persists, consult the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the mirror system

20. Professional Help

21. If you are unable to resolve the issue, consider seeking assistance from a professional mechanic or automotive technician who has experience with electrical systems. By following these steps, you should be able to identify and resolve the issue related to the B1775 code