my Volkswagen Tiguan won't start just clicks what should I do

Solution

1. Preparation

• Gather tools: multimeter, jumper cables, socket set, torque wrench, OBD-II scanner, and safety gloves.
• Ensure the vehicle is in park (or neutral for manual) and the parking brake is engaged.

2. Battery Inspection and Replacement

1. Check battery voltage: Use a multimeter to measure voltage. If below 12.4 volts, charge or replace the battery.
2. Clean battery terminals: Disconnect the negative (-) terminal first, then the positive (+) terminal. Clean any corrosion with a wire brush and a mixture of baking soda and water.
3. Reconnect terminals: Connect the positive (+) terminal first, followed by the negative (-) terminal.

3. Jump-Start the Vehicle

1. Set up jumper cables: Connect one end of the red jumper cable to the positive terminal of the dead battery and the other end to the positive terminal of the working battery. Connect one end of the black cable to the negative terminal of the working battery and the other end to a grounded metal surface on the dead vehicle.
2. Start the working vehicle: Let it run for a few minutes before attempting to start the Tiguan.
3. Start the Tiguan: Attempt to start the vehicle. If it starts, let it run for at least 15 minutes to charge the battery.

4. Starter Motor Inspection

1. Locate the starter: Refer to the vehicle's service manual for the specific location.
2. Test the starter: Perform a voltage drop test by connecting the multimeter to the positive terminal on the starter and the battery positive terminal while attempting to start the vehicle. A drop above 0.5 volts indicates a faulty starter.
3. Replace starter if necessary: If the starter shows insufficient performance, remove it by detaching the bolts and electrical connections, and install the new starter, ensuring to torque bolts to manufacturer specifications.