how to fix my Volkswagen Passat B8 (2015-2022) that won’t start but clicks

Solution

1. Preparation

• Tools Required: Multimeter, OBD-II scanner, jumper wire, socket set, torque wrench
• Ensure the vehicle is in park or neutral with the parking brake engaged.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Check and Replacement

• Sub-steps:
  1. Reconnect the battery and check the voltage with a multimeter. If below 12.4 volts, charge or replace the battery.
  2. If replacing, remove the battery by loosening the hold-down clamp and disconnecting the positive terminal first, followed by the negative.
  3. Install the new battery by connecting the positive terminal first, followed by the negative terminal. Tighten securely.

3. Starter Motor Inspection

• Sub-steps:
  1. Locate the starter motor under the vehicle (usually near the transmission).
  2. Disconnect the electrical connector and the battery cable from the starter.
  3. Test the starter motor by connecting a jumper wire from the positive battery terminal to the starter terminal. If the motor does not engage, it may need replacement.
  4. If replacing, unbolt the starter motor from its mounting, and install the new one in reverse order.

4. Relay and Fuse Check

• Sub-steps:
  1. Locate the fuse box (consult the owner’s manual for location).
  2. Inspect and replace any blown fuses related to the starting system.
  3. Test the starter relay (usually found in the fuse box) using a multimeter for continuity. Replace if faulty.