B1736: Mirror Driver Vertical Switch Circuit Short To Ground

Definition

The OBD2 code B1736 indicates a fault in the vertical switch circuit of the mirror driver, specifically a short to ground condition, which means there is an unintended connection to the ground that affects the operation of the mirror adjustment

Common causes

Shorted wiring or connectors in the mirror switch circuit
Faulty mirror switch
Damaged mirror motor
Grounding issues in the circuit
Corroded or damaged connectors
Faulty body control module (BCM)

Common misdiagnoses

Faulty mirror switch
Wiring harness issues
Shorted wiring
Faulty mirror motor
Body control module (BCM) malfunction
Incorrectly installed or damaged mirror assembly
Grounding issues in the electrical system

Troubleshooting steps

1. Check the Vehicle's Manual

Refer to the vehicle's service manual for specific wiring diagrams and component locations related to the mirror driver vertical switch
2. Visual Inspection
3. Inspect the wiring harness and connectors associated with the mirror switch for any signs of damage, fraying, or corrosion
4. Look for any loose connections or broken wires that could cause a short to ground
5. Test the Mirror Switch
6. Disconnect the mirror switch from the wiring harness
7. Use a multimeter to test the switch for continuity. If the switch is faulty, it may need to be replaced
8. Check for Shorts
9. With the switch disconnected, use a multimeter to check for continuity between the mirror switch circuit wires and ground. If there is continuity, there is a short to ground somewhere in the circuit
10. Inspect the wiring harness for pinched or damaged wires that could be causing the short
11. Inspect the Mirror Assembly
12. If the vehicle has power mirrors, check the mirror assembly for any signs of damage or water intrusion that could affect the electrical components
13. Check for Faulty Components
14. If the wiring and switch are in good condition, check other components in the circuit, such as the mirror motor or any related control modules, for faults
15. Clear the Code
16. 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
17. Consult a Professional
18. 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 B1736 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check the Vehicle's Manual

2. Visual Inspection

3. Inspect the wiring harness and connectors associated with the mirror switch for any signs of damage, fraying, or corrosion

4. Look for any loose connections or broken wires that could cause a short to ground

5. Test the Mirror Switch

6. Disconnect the mirror switch from the wiring harness

7. Use a multimeter to test the switch for continuity. If the switch is faulty, it may need to be replaced

8. Check for Shorts

9. With the switch disconnected, use a multimeter to check for continuity between the mirror switch circuit wires and ground. If there is continuity, there is a short to ground somewhere in the circuit

10. Inspect the wiring harness for pinched or damaged wires that could be causing the short

11. Inspect the Mirror Assembly

12. If the vehicle has power mirrors, check the mirror assembly for any signs of damage or water intrusion that could affect the electrical components

13. Check for Faulty Components

14. If the wiring and switch are in good condition, check other components in the circuit, such as the mirror motor or any related control modules, for faults

15. Clear the Code

16. 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

17. Consult a Professional

18. 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 B1736 code