my Volkswagen Tiguan First Generation (2007-2018) doors won’t unlock from the remote

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, flathead screwdriver, Phillips screwdriver, and replacement key fob battery.
• Ensure the vehicle is in a secure area and the battery is disconnected before working on electronic components.

2. Replace Key Fob Battery

• Open the key fob using a flathead screwdriver to pry it apart carefully.
• Remove the old battery and replace it with a new one, ensuring correct polarity.
• Reassemble the key fob and test if the doors unlock.

3. Inspect and Replace Central Locking Relay/Fuse

• Locate the vehicle’s fuse box, typically found under the dashboard or in the engine compartment.
• Identify the fuse for the central locking system (refer to the owner’s manual for the exact location).
• Use a multimeter to test the fuse for continuity. Replace if blown.
• Check the central locking relay, located in the same fuse box, and replace if faulty.

4. Test Door Lock Actuators

• Remove the door panel of any door to access the locking mechanism.
• Inspect the door lock actuator for signs of damage or malfunction.
• If defective, disconnect the actuator and replace it with a new one, ensuring it is properly connected.

5. Reassemble and Test

• Reattach the door panel securely and reconnect the vehicle battery.
• Test the key fob and inside lock buttons to confirm the issue is resolved.