B1776 – Mirror Driver Up Circuit Short To Ground

The ODBII code B1776 indicates a short circuit in the mirror driver up circuit, meaning there is an electrical fault causing the circuit to connect to ground improperly.

The severity of ODBII code B1776 is generally considered moderate.

Common Causes For: B1775 Mirror Driver Up Circuit Short To Battery

• Shorted wiring or connectors in the mirror circuit.
• Faulty mirror assembly.
• Damaged or corroded ground connections.
• Malfunctioning body control module (BCM).
• Incorrectly installed or damaged harness.

Common misdiagnosis for B1776 Mirror Driver Up Circuit Short To Ground

• Faulty mirror switch
• Wiring harness issues
• Defective mirror motor
• Shorted wiring in the door
• Malfunctioning body control module (BCM)
• Incorrectly installed or damaged mirror assembly
• Issues with the vehicle’s electrical system or grounds

Common Troubleshooting Steps

The OBD-II code B1776 indicates a problem with the mirror driver circuit, specifically a short to ground condition. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Visual Inspection:
• Check the wiring and connectors associated with the mirror assembly for any signs of damage, fraying, or corrosion.
• Look for any loose connections or broken wires that could cause a short to ground.
• Check the Mirror Assembly:
• Inspect the mirror itself for any physical damage that could affect the electrical components.
• If the mirror has heating elements or other features, ensure they are functioning correctly and not causing a short.
• Test the Mirror Driver Circuit:
• Use a multimeter to check the resistance of the mirror driver circuit. A very low resistance reading may indicate a short to ground.
• Disconnect the mirror connector and test the circuit again to see if the short persists. If the short disappears, the issue may be within the mirror assembly.
• Check Ground Connections:
• Ensure that all ground connections related to the mirror circuit are secure and free of corrosion.
• Test the ground circuit with a multimeter to ensure it is functioning properly.
• Inspect Related Components:
• Check any related components, such as switches or control modules, that may be involved in the mirror operation.
• Ensure that these components are functioning correctly and not contributing to the short.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context for the issue.
• Address any other codes that may be present, as they could be related.
• Repair or Replace Faulty Components:
• If a specific faulty component is identified (e.g., wiring, connectors, or the mirror assembly itself), repair or replace it as necessary.
• Ensure that any repairs are done with high-quality materials to prevent future issues.
• Clear Codes and Test Drive:
• After making repairs, clear the trouble codes using an OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears.
• Consult Service Manual:
• Refer to the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the mirror driver circuit.
• Seek Professional Help:
• If the issue persists after following these steps, consider consulting a professional mechanic or automotive technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1776 code.