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:

Lights On Indicator Light
Purpose Notifies the user that the TNS or the headlights (LO) are on. Function Illuminates when the illumination conditions for the TNS, headlights (LO), or parking lights are met. When the instrument cluster receives the TNS malfunction signal sent via CAN communic ...

Tcs Control
Outline The TCS control actuates torque reduction through engine control, as well as using brake control to control traction. NOTE: Engine control: Engine output is lowered by fuel cut and ignition timing control to reduce the traction, preventing driving wheel slip. ...

Auto Leveling Sensor Inspection
1. Disconnect the negative battery cable.. 2. Remove the auto leveling sensor.. 3. Prepare three dry cell batteries (1.5 V). 4. Connect the three dry cell batteries in a series. 5. Connect the positive pole of the dry cell battery to auto leveling sensor terminal C, and the negative po ...