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:

Rear Washer Nozzle Adjustment
CAUTION: If the nozzle angle is adjusted with excessive force by strongly inserting a needle or similar thin tool into the injection nozzle of rear washer nozzle, it could damage the nozzle internally. When adjusting the nozzle, be careful not to apply excessive force. 1. Inse ...

Throttle Body
Purpose, Function Opens/closes the throttle valve to adjust the amount of air supplied to the cylinder. Opens/closes the throttle valve according to the control signal from the PCM. Construction The throttle body is installed to the intake manifold. Th ...

B Pillar Upper Trim Removal/Installation
1. Remove the following parts: a. Front scuff plate. b. Rear scuff plate. c. B-pillar lower trim. d. Adjuster anchor cover. e. Upper anchor installation bolts on the front seat belt. 2. Partially peel back the seaming welt. 3. Take the shaded area shown in the figure, and pull the B-pi ...