why does my Volkswagen Golf MK7 (2015-2019) make a clicking noise when trying to start?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, jumper cables, and cleaning supplies.
• Ensure the vehicle is in park or neutral and the ignition is off.
• Disconnect the negative battery cable to prevent electrical shock.

2. Battery Maintenance

• Inspect the Battery:

  • Remove the battery terminals (negative first, then positive).
  • Clean the terminals with a wire brush and a mixture of baking soda and water to remove corrosion.
  • Tighten the terminals securely before reconnecting.

• Test the Battery:

  • Reconnect the battery terminals (positive first, then negative).
  • Measure the voltage again; if it is below 12.4 volts, consider recharging or replacing the battery.

3. Starter Motor Inspection

• Access the Starter:

  • Raise the vehicle using a jack and secure it with jack stands.
  • Locate the starter motor, usually found near the transmission.

• Test the Starter:

  • Use jumper cables to connect the positive terminal of the battery directly to the starter's positive terminal while the negative cable remains grounded.
  • If the starter engages and the engine cranks, the starter may be faulty.

4. Replace the Starter (if necessary)

• Remove the Old Starter:

  • Disconnect any wiring harnesses attached to the starter.
  • Remove the mounting bolts using a socket set and take out the starter.

• Install New Starter:

  • Position the new starter in place and secure it with the mounting bolts (torque to manufacturer specifications).
  • Reconnect the wiring harnesses.