what should I do if my Volkswagen Golf MK6 (2009-2014) won't start at all?

Solution

1. Preparation

• Gather necessary tools: multimeter, socket set, OBD-II scanner, safety gloves, and protective eyewear.
• Ensure the vehicle is in a safe, well-ventilated area with the parking brake engaged.

2. Battery Inspection and Replacement

1. Inspect Battery

   • Disconnect the negative terminal first, followed by the positive terminal.
   • Clean any corrosion from terminals using a wire brush and a solution of baking soda and water.

2. Test Battery Voltage

   • Reconnect the positive terminal and check battery voltage with a multimeter.
   • If the voltage is below 12.4V, proceed to replace the battery.

3. Replace Battery

   • Remove the old battery by unbolting any retaining brackets and lifting it out carefully.
   • Install the new battery in reverse order, ensuring the positive terminal is connected first.
   • Tighten terminals securely.

3. Starter Motor Inspection

1. Check Starter Connections

   • Locate the starter motor and inspect its connections for any looseness or corrosion.
   • Clean any corrosion found and reconnect securely.

2. Test Starter Operation

   • Use a multimeter to check for voltage at the starter terminal while someone attempts to start the vehicle.
   • If voltage is present but the starter does not engage, the starter may need to be replaced.

3. Replace Starter Motor

   • Disconnect the battery again.
   • Remove any components obstructing access to the starter (if necessary).
   • Unbolt the starter motor and disconnect electrical connectors.
   • Install the new starter and reconnect all components and the battery.

4. Ignition Switch Inspection

1. Test Ignition Switch
   • Remove the ignition switch cover and check for continuity using a multimeter when the key is in the start position.
   • If continuity is not present, replace the ignition switch.

5. Final Checks

1. Recheck Fuses
   • Inspect and replace any blown fuses related to the ignition or starting circuit.