my Volkswagen Tiguan's remote start not working how can I troubleshoot it

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, small screwdriver set.
• Ensure the vehicle is parked on a flat surface and the ignition is off.

2. Replace Key Fob Battery

• Use a small screwdriver to gently open the key fob casing.
• Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
• Reassemble the key fob and test the remote start function.

3. Verify Gear Selector Position

• Ensure the gear selector is in the "Park" position for automatic vehicles or "Neutral" for manual vehicles.
• If necessary, adjust the gear selector and try the remote start again.

4. Scan for Fault Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn on the ignition without starting the engine.
• Retrieve any stored fault codes related to the immobilizer or security system and address any issues found.

5. Check Vehicle Battery Voltage

• Use a multimeter to check the voltage of the vehicle’s battery.
• Voltage should be above 12.4 volts; if lower, consider charging or replacing the battery.

6. Inspect Security System

• Check the vehicle's manual for security system reset instructions.
• Look for any abnormalities or issues with the vehicle's security system that may prevent remote starting.