This procedure covers removal and replacement of the electric power steering (EPS) control module on 2014-2019 Toyota Corolla models equipped with the 1.8L I4 engine.

Warnings

Tools required

Parts

• Electric Power Steering Control Module × 1 — Use OEM specification
• EPS module mounting gasket/seal (if applicable) × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Turn ignition off and remove key from ignition
3. Open hood and secure with hood prop
4. Disconnect negative battery terminal and wait 90 seconds minimum
5. Take photos of wiring harness routing and connector positions for reference during reassembly

Procedure

1. 1

   Remove driver side engine cover and air intake components
   Remove the engine cover by pulling upward on the integrated pull tabs. Remove any plastic clips securing the air intake duct near the driver's side fender area to improve access to the EPS module location. Set components aside in a clean area.
2. 2

   Locate the EPS control module
   The EPS module is mounted on the driver's side of the engine compartment, attached to the steering column support bracket below the brake master cylinder. It is a rectangular aluminum housing with multiple electrical connectors and a cooling bracket. Identify the module and note connector positions.
3. 3

   Disconnect electrical connectors
   Press the locking tabs on each electrical connector attached to the EPS module and carefully pull connectors straight out. There are typically 2-3 connectors depending on model year. Do not pull on wiring harnesses, only on connector bodies. Mark or photograph connector positions if not already done.
   ⚠Connector locking tabs are fragile. Use a small flathead screwdriver to gently release tabs if they are stuck, but avoid excessive force.
4. 4

   Remove module mounting bolts
   Using a 12mm socket, remove the mounting bolts securing the EPS module to the steering column support bracket. There are typically 2-3 bolts depending on configuration. Support the module with one hand while removing the final bolt to prevent it from falling.
   ℹ️The module may be secured with a combination of bolts and bracket clips. Ensure all fasteners are removed before attempting to pull the module free.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)
5. 5

   Remove EPS control module
   Carefully slide the EPS module away from the mounting bracket. It may require gentle wiggling to clear alignment pins or grommets. Once free, remove the module from the engine compartment. Inspect the mounting surface for dirt, corrosion, or damage.
6. 6

   Inspect mounting area and prepare for installation
   Clean the mounting bracket surface with a lint-free cloth. Inspect electrical connectors for corrosion, damaged pins, or debris. Check that any gasket or seal surface on the bracket is clean and dry. If the original module had a gasket or thermal pad, remove residue and prepare to install new gasket with replacement module.
7. 7

   Install new EPS control module
   Position the new EPS module onto the mounting bracket, ensuring any alignment pins or locating features engage properly. If applicable, install new gasket or thermal interface pad between module and bracket. Hand-thread all mounting bolts before tightening to ensure proper alignment.
8. 8

   Torque mounting bolts
   Using a torque wrench, tighten the EPS module mounting bolts to specification in a cross-pattern sequence to ensure even pressure distribution. Verify module is seated flush against mounting bracket after torquing.
   ⚠Over-torquing mounting bolts can crack the module housing or distort the circuit board inside. Use a calibrated torque wrench.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)
9. 9

   Reconnect electrical connectors
   Reconnect all electrical connectors to the EPS module in their original positions. Push each connector firmly until the locking tab clicks into place. Gently tug on each connector to verify it is fully seated and locked.
10. 10

    Reinstall air intake and engine cover
    Reinstall any air intake duct components removed for access, securing with original clips. Reinstall the engine cover by aligning mounting grommets and pressing down until fully seated.
11. 11

    Reconnect battery and initialize system
    Reconnect the negative battery terminal. Turn the ignition to ON position (do not start engine) and verify the EPS warning light illuminates then extinguishes after a few seconds. If the light remains on, recheck all connections before proceeding.

Reassembly

1. Ensure all electrical connectors are fully seated and locked before reconnecting battery
2. Route wiring harnesses in their original positions to avoid interference with moving components
3. Double-check that all mounting bolts are torqued to specification

Verification

• Start the engine and verify the EPS warning light on the instrument cluster goes out within a few seconds
• Turn the steering wheel slowly from lock to lock while stationary and verify smooth power assist operation with no unusual noises or binding
• Test drive the vehicle at low speed in a safe area and confirm normal steering feel and assist levels
• If EPS warning light remains illuminated, use a scan tool to check for diagnostic trouble codes and verify module communication
• Verify no fluid leaks around the steering components and no loose fasteners after test drive

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