how to fix my Volkswagen Golf MK7 (2015-2019) if it won't start at all?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is in a safe and accessible location.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Battery Inspection and Replacement

• Step 2.1: Inspect battery terminals.

  • Clean terminals with a wire brush if corroded.
  • Tighten loose connections.

• Step 2.2: Test or replace the battery.

  • If the battery voltage is below 12.6 volts, jump-start the vehicle. If it starts, consider replacing the battery if it fails to hold a charge.

3. Starter Motor Diagnosis

• Step 3.1: Locate the starter motor.

  • It is typically located near the engine block.

• Step 3.2: Check wiring connections.

  • Inspect and tighten the positive and negative connections to the starter motor.

• Step 3.3: Test the starter motor.

  • Using a multimeter, check for power at the starter terminal while someone turns the key to the start position.
  • If power is present and the starter doesn’t engage, replace the starter motor.

4. Check Ignition Switch and Relays

• Step 4.1: Locate the ignition switch.

  • Remove the steering column covers to access the ignition switch.

• Step 4.2: Test the ignition switch.

  • Use a multimeter to check for continuity when the key is turned.
  • Replace the ignition switch if it is faulty.

• Step 4.3: Test or replace any relays related to the starting system.

  • Swap with a similar relay in the fuse box to test functionality.