my Ford Mustang S650 (2024-Present) key fob won't unlock the doors, what to do?

Solution

1. Preparation

• Tools Required: Small flathead screwdriver, new key fob battery (typically CR2032), OBD-II scanner.
• Ensure the vehicle is in park and the ignition is off.
• Disconnect the battery for safety before working on electronic components.

2. Replace Key Fob Battery

• Sub-steps:
  1. Use the small flathead screwdriver to gently pry open the key fob casing.
  2. Remove the old battery and dispose of it properly.
  3. Insert the new battery with the correct polarity (+/-).
  4. Snap the key fob casing back together until it clicks securely.

3. Reprogram the Key Fob

• Sub-steps:
  1. Enter the vehicle and close all doors.
  2. Insert the key into the ignition and turn to the "On" position without starting the engine.
  3. Press the "Unlock" button on the key fob for about 5 seconds.
  4. Turn the key back to the "Off" position and remove it.
  5. Test the key fob to ensure functionality.

4. Inspect the Vehicle's Locking System

• Sub-steps:
  1. Check for blown fuses related to the central locking system in the fuse box.
  2. Replace any blown fuses with the correct amperage.
  3. Inspect the door lock actuators for functionality by manually checking if they respond when the vehicle is locked/unlocked.