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:

Steering Gear And Linkage Inspection
1. Remove the steering gear and linkage.. 2. Remove the tie-rod end and boot.. 3. Measure the rotation torque of the pinion shaft using a crescent wrench and pull scale. (speed measurement reference 5 В°/s) a. Install the crescent wrench to the steering gear. b. Measure the length fr ...

Knock Sensor (Ks) Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the plug hole plate.. 3. Remove the intake manifold.. 4. Disconnect the KS connector. 5. Remove the KS.. 6. Install in the reverse order of removal. KS Installation Note Verify that there is no foreign matter caught between ...

Vanity Mirror Illumination Bulb Removal/Installation
1. Disconnect the negative battery cable.. 2. Insert a tape-wrapped flathead screwdriver into the service hole in the position shown in the figure. 3. Move a flathead screwdriver in the direction of the arrow (1) shown in the figure and detach the lens tab and sunvisor. 4. Detach a ...