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ELECTRIC POWER STEERING (EPS) MOTOR

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2016 – MX-5 – Steering

ELECTRIC POWER STEERING (EPS) MOTOR

Purpose, Function

  • The EPS motor is driven by the control current from the EPS Control Module (CM) and generates assist torque to manual steering mechanism.

Construction

  • The EPS motor is installed to the steering gear housing and integrated with the EPS CM.

  • The EPS motor is a brushless motor which consists of a three-phase star-connected stator, a permanent magnet rotor, and resolver sensor.

Operation

  • Current flows from the EPS CM to the stator to rotate the motor axis which is integrated with the rotor.

  • A resolver sensor for detecting rotation angle is built into the EPS motor and outputs a motor rotation angle signal to the EPS CM.

  • The EPS CM switches the current flowing to each stator based on the rotation angle signal from the resolver sensor.

Fail-safe

DTC No.

Fail-safe function

C200D:1C

  • Inhibits control

  • Power steering malfunction indicator light: Illuminated

C200D:64

U2011:19

U2011:1C

U2011:61

U2011:62

U2011:64

U2011:72

U2011:92

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