my Volkswagen Passat B8 makes a clicking noise when starting what could be wrong

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety during repairs.
• Tools Required: Multimeter, socket set, wrenches, and a battery terminal cleaner.

2. Battery Inspection

• Sub-step 1: Clean battery terminals using a battery terminal cleaner to remove corrosion.
• Sub-step 2: Reconnect the battery terminals securely and ensure they are tight.
• Sub-step 3: If the battery is weak, replace it with a new one (ensure it matches OEM specifications).

3. Starter Relay and Motor Check

• Sub-step 1: Locate the starter relay in the fuse box (refer to the owner's manual for the exact location).
• Sub-step 2: Swap the relay with a similar one to test if the relay is faulty; if the clicking noise stops, replace the relay.
• Sub-step 3: Inspect the starter motor by checking its electrical connections and ensuring no loose wires or corrosion are present.
• Sub-step 4: If necessary, remove the starter motor for testing and replacement. Use a torque wrench to ensure proper reinstallation torque (typically around 15-25 Nm).

4. Ignition Switch Inspection

• Sub-step 1: Remove the steering column cover to access the ignition switch.
• Sub-step 2: Use a multimeter to test for continuity in the ignition switch when turned to the start position.
• Sub-step 3: Replace the ignition switch if continuity is not present or if it shows any signs of wear.