why does my Volkswagen Golf MK7 (2015-2019) make a clicking noise when starting

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

551 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Diagnose and fix the clicking noise when starting your Volkswagen Golf MK7 (2015-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent shorts or shocks.
•Allow the engine to cool before servicing the starter motor or ignition system.

Symptoms

•Clicking sound when turning the ignition key
•Engine does not crank or starts slowly
•Dashboard lights dim or flicker during starting
•Battery warning light illuminated
•Possible intermittent electrical issues (e.g., radio resets)

Diagnostic Steps

1
Check the battery voltage using a multimeter; it should be around 12.6 volts when fully charged.
2
Inspect battery terminals for corrosion or loose connections.
3
Test the battery load with a load tester to determine if it can hold a charge.
4
Inspect the starter motor connections for tightness and corrosion.
5
Check for any blown fuses in the starting circuit.
6
Verify the ignition switch functionality by checking for continuity when in the 'start' position.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Torque wrench

Parts Required

•New battery (if necessary)
•Starter motor (if necessary)
•Ignition switch (if necessary)

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Diagnostic Steps

1
Check the battery voltage using a multimeter; it should be around 12.6 volts when fully charged.
2
Inspect battery terminals for corrosion or loose connections.
3
Test the battery load with a load tester to determine if it can hold a charge.
4
Inspect the starter motor connections for tightness and corrosion.
5
Check for any blown fuses in the starting circuit.
6
Verify the ignition switch functionality by checking for continuity when in the 'start' position.

Solution

1. Preparation

Tools Required: OBD-II scanner, Multimeter, Socket set, Torque wrench
Disconnect the negative terminal of the battery to ensure safety during repairs.

2. Battery Inspection and Replacement

Sub-steps:
1. Remove the battery cover if present.
2. Clean the battery terminals using a wire brush and terminal cleaner.
3. If the battery is found to be weak or faulty (below 12.4 volts after testing), replace it with a new battery.
4. Reconnect the terminals, ensuring they are tight and free of corrosion.
5. Torque the terminal bolts to manufacturer specifications (typically around 8-10 Nm).

3. Starter Motor Inspection

Sub-steps:
1. Locate the starter motor under the vehicle (typically near the transmission).
2. Disconnect the electrical connector from the starter motor.
3. Inspect the starter motor for any signs of physical damage or corrosion.
4. If necessary, remove the starter motor from its mount by unbolting it (torque specifications will vary).
5. Test the starter motor with a direct battery connection to determine if it operates correctly; replace it if it fails to engage.

4. Ignition Switch Check

Sub-steps:
1. Access the ignition switch by removing the steering column cover.
2. Inspect for any visible damage to the switch or wiring.
3. Use a multimeter to check for continuity in the ignition switch positions.
4. If the switch is faulty, replace it with a new unit.