how to diagnose electric power steering (EPS) problems in Ford Explorer

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

548 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 Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Steering

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems
•Ensure the vehicle is securely parked and the engine is off before starting repairs

Symptoms

•Steering wheel feels heavy or unresponsive
•Unusual noises coming from the steering column
•Illuminated power steering warning light on the dashboard
•Intermittent steering assist loss
•Difficulty in making turns, especially at low speeds

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related DTCs
2
Inspect the EPS fuse in the fuse box for any blown fuses related to steering
3
Check the battery voltage and charging system to ensure proper power supply to the EPS motor
4
Perform a visual inspection of the EPS wiring harness and connectors for any signs of damage or corrosion
5
Test the EPS motor by applying direct power to determine if it responds correctly
6
Verify the operation of the steering angle sensor with a scan tool to check for proper readings

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
•Fuse puller
•Screwdrivers

Parts Required

•EPS fuse (if blown)
•EPS motor (if defective)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related DTCs
2
Inspect the EPS fuse in the fuse box for any blown fuses related to steering
3
Check the battery voltage and charging system to ensure proper power supply to the EPS motor
4
Perform a visual inspection of the EPS wiring harness and connectors for any signs of damage or corrosion
5
Test the EPS motor by applying direct power to determine if it responds correctly
6
Verify the operation of the steering angle sensor with a scan tool to check for proper readings

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and set the parking brake.
Disconnect the negative battery terminal to avoid electrical shorts during repairs.

2. Inspect and Replace EPS Fuse

Locate the fuse box under the dashboard or engine bay.
Identify the EPS fuse based on the owner’s manual.
Remove the fuse using a fuse puller and visually inspect it.
If blown, replace it with a fuse of the same amperage (usually 10A or 15A depending on the model).

3. Repair Wiring and Connectors

Visually inspect the EPS wiring harness for fraying, cuts, or corrosion.
Use a multimeter to test continuity in the wires.
Repair or replace any damaged sections of wiring or connectors as needed.

4. Replace EPS Motor (if necessary)

Disconnect the EPS motor connector.
Remove the mounting bolts securing the EPS motor to the steering column using a socket set.
Carefully pull the motor away from the column.
Install the new EPS motor in reverse order, ensuring all connectors are securely attached.

5. Reconnect Battery and Test

Reconnect the negative battery terminal.
Start the vehicle and check for any warning lights on the dashboard.
Test the steering operation to ensure normal function.