how to diagnose electric power steering problems in Volkswagen Golf MK6 (2009-2014)

Volkswagen Golf MK7 (2015-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

576 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 electric power steering problems in Volkswagen Golf MK6 (2009-2014). Step-by-step guide with symptoms and solutions.

Affected Component

Steering

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Wear gloves and safety glasses to prevent contact with fluid.
•Ensure the battery is disconnected before handling wiring.
•Ensure the steering wheel is centered before reinstallation.

Symptoms

•Steering feels heavy or unresponsive
•Warning light illuminated on the dashboard
•No assist when steering at low speeds
•Intermittent loss of power steering assist
•Unusual noises when turning the steering wheel

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any fault codes related to the power steering system.
2
Inspect the power steering fluid level and condition, ensuring it is within the recommended range and not contaminated.
3
Check the battery voltage and charging system, as low voltage can affect electric power steering performance.
4
Inspect the power steering motor and wiring connections for any signs of damage or corrosion.
5
Test the steering angle sensor for proper function, as a faulty sensor can cause steering issues.
6
Verify the functionality of the electric power steering control module.

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
•Fluid extraction pump
•Steering wheel puller
•Socket set
•Torque wrench

Parts Required

•Power steering fluid
•Steering angle sensor (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any fault codes related to the power steering system.
2
Inspect the power steering fluid level and condition, ensuring it is within the recommended range and not contaminated.
3
Check the battery voltage and charging system, as low voltage can affect electric power steering performance.
4
Inspect the power steering motor and wiring connections for any signs of damage or corrosion.
5
Test the steering angle sensor for proper function, as a faulty sensor can cause steering issues.
6
Verify the functionality of the electric power steering control module.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace Power Steering Fluid

Sub-steps:
- Locate the power steering fluid reservoir.
- Check the fluid level; if low, top it up with the manufacturer-recommended fluid.
- If the fluid is dirty or contaminated, drain and replace it.
Tools Required: Fluid extraction pump, funnel.
Safety Warnings: Wear gloves and safety glasses to prevent contact with fluid.

3. Repair Wiring and Connectors

Sub-steps:
- Visually inspect the wiring harness connected to the power steering motor for frays or breaks.
- Clean any corrosion from connectors using electrical contact cleaner.
- Repair any damaged wires using heat-shrink tubing and soldering if necessary.
Tools Required: Wire strippers, soldering iron, electrical tape.
Safety Warnings: Ensure the battery is disconnected before handling wiring.

4. Replace Steering Angle Sensor (if faulty)

Sub-steps:
- Remove the steering wheel (note the position for proper reinstallation).
- Disconnect the sensor wiring harness.
- Remove the old sensor and install the new one, ensuring it is aligned correctly.
- Reconnect the wiring harness and reassemble the steering wheel.
Tools Required: Steering wheel puller, socket set, torque wrench.
Safety Warnings: Ensure the steering wheel is centered before reinstallation.

5. Reconnect Battery and Clear Codes

Sub-steps:
- Reconnect the negative battery terminal.
- Use the OBD-II scanner to clear any stored error codes.
- Perform a steering calibration if required by the vehicle’s service manual.
Tools Required: OBD-II scanner.