my Volkswagen Golf MK7 (2015-2019) won't start and makes a clicking noise

Volkswagen Golf MK7 (2015-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

535 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

Learn how to diagnose and fix a no-start condition in your Volkswagen Golf MK7 (2015-2019). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is off and in gear (or park), and wear gloves when handling the battery.
•Be cautious of moving parts and ensure the vehicle is secure.
•Ensure the vehicle is supported securely if elevated.
•Disconnect battery before working on electrical systems.
•Allow engine to cool before performing any repairs.

Symptoms

•Engine does not crank
•Clicking noise from the engine bay
•Dashboard lights dim when key is turned
•No response from starter motor
•Battery warning light illuminated (if applicable)

Diagnostic Steps

1
Check the battery voltage using a multimeter; it should be above 12.4 volts for a healthy battery.
2
Inspect battery terminals and connections for corrosion or looseness.
3
Test the starter motor relay by swapping it with a similar relay in the fuse box.
4
Use the OBD-II scanner to check for any related error codes.
5
Perform a voltage drop test on the battery cables.

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

•Multimeter
•Wire brush
•Battery charger
•Socket set
•Torque wrench
•Jumper wire

Parts Required

•New battery (if needed)
•New starter motor (if confirmed faulty)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the battery voltage using a multimeter; it should be above 12.4 volts for a healthy battery.
2
Inspect battery terminals and connections for corrosion or looseness.
3
Test the starter motor relay by swapping it with a similar relay in the fuse box.
4
Use the OBD-II scanner to check for any related error codes.
5
Perform a voltage drop test on the battery cables.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe, flat area.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Inspection and Replacement

Sub-steps:
1. Inspect the battery terminals and clean any corrosion with a wire brush.
2. Tighten any loose connections securely.
3. If the battery voltage is below 12.4 volts, charge the battery using a battery charger.
4. If the battery is old or unable to hold a charge, replace it with a new one.
Tools Required: Wire brush, battery charger, socket set.
Safety Warnings: Ensure the vehicle is off and in gear (or park), and wear gloves when handling the battery.

3. Starter Motor Testing

Sub-steps:
1. Reconnect the negative battery terminal.
2. Locate the starter motor; it is usually found near the transmission.
3. Check the electrical connections to the starter motor for looseness or corrosion.
4. If connections are fine, use a jumper wire to bypass the ignition switch and apply voltage directly to the starter; if it engages, the starter is likely faulty.
Tools Required: Socket set, jumper wire.
Safety Warnings: Be cautious of moving parts and ensure the vehicle is secure.

4. Replace Starter Motor (if necessary)

Sub-steps:
1. Remove any components obstructing access to the starter motor (e.g., intake duct).
2. Disconnect the electrical connections from the starter motor.
3. Unbolt the starter motor from the engine/transmission assembly.
4. Install the new starter motor in reverse order and torque bolts to manufacturer specifications.
Tools Required: Torque wrench, socket set.
Safety Warnings: Ensure the vehicle is supported securely if elevated.