how to diagnose EPS problems in my Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, screwdrivers.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace EPS Fuse

• Locate the EPS fuse in the fuse box.
• Remove the fuse using a fuse puller or pliers.
• Inspect the fuse for continuity using a multimeter; replace if blown.
• Reinstall the new fuse and reconnect the battery.

3. Repair or Replace Wiring and Connectors

• Identify any damaged wiring or connectors found during the visual inspection.
• Cut and strip the damaged wire, then splice in a new section of wire using solder or crimp connectors.
• Ensure connections are secure and insulated with heat shrink tubing or electrical tape.

4. Replace EPS Motor (if necessary)

• Tools Required: Socket set, torque wrench.
• Disconnect the EPS motor electrical connector.
• Remove the mounting bolts securing the EPS motor to the steering assembly.
• Replace with a new EPS motor, ensuring it is securely fastened.
• Reconnect the electrical connector and torque bolts to manufacturer specifications.

5. Reset EPS System

• Reconnect the battery terminal.
• Turn the ignition to the "ON" position without starting the engine.
• Use the OBD-II scanner to clear any stored error codes related to the EPS system.