Mazda CX-5 Service & Repair Manual: Electric Power Steering (Eps) Motor

Mazda CX-5 Service & Repair Manual / Steering / Linkage, Power / Electric Power Steering (Eps) Motor

Purpose, Function

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

Construction

The EPS motor is installed to the steering column with an integrated 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	Control disabled Power steering malfunction indicator light: Illuminated
C200D:64
U2011:19
U2011:1C
U2011:62
U2011:72	Phase 1 open circuit malfunction is detected in the EPS motor Control is maintained in the backup control Other malfunction detected in EPS motor internal circuit Control disabled
U2011:92	Control disabled Power steering malfunction indicator light: Illuminated

Electric Power Steering (Eps) Control Module

Purpose/ Function The EPS control module (CM) calculates the optimum assist current based on the steering torque signal from the torque sensor installed to the steering column and the veh ...

Electric Power Steering System

Outline A column assist type EPS has been adopted for all models. EPS provides smooth handling from low to high speeds as a result of the excellent steering feel provided by the elec ...

Other materials:

Shift Point Control (Automatic Shift Control) [Fw6 A EL, Fw6 Ax EL]
Outline The TCM implements auto shift control according to the vehicle speed and accelerator pedal depression amount while in D position. When the vehicle is stopped with the selector lever is in the D position and the brake pedal depressed, the neutral idle control is performed ...

Differential Oil Temperature Sensor
Purpose, Function The differential oil temperature sensor detects the rear differential oil temperature based on the resistance of the thermistor, and inputs it to the AWD CM. Construction The differential oil temperature sensor is installed in the rear differential carr ...

Front Seat Side Cover Removal/Installation
WARNING: Handling a side air bag improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings in the Workshop Manual before handling the front seat (side air bag integrated).. If the sliding mechanisms on both sides are ...