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:

M Position Switch [Fw6 A EL, Fw6 Ax EL]
Purpose/Function The M position switch detects that the selector lever is in the M position. The M position switch signal is sent to the TCM via CAN, and is used for manual shift control and engine-transaxle integration control. Construction The M position switch is in ...

Fuel Pressure Sensor
Purpose/Function Detects the fuel pressure in the fuel distributor as basic information for mainly determining the fuel injection amount. Detects the fuel pressure in the fuel distributor and inputs it to the PCM as a fuel pressure signal. Construction Installed on ...

Wheel Hub Component Removal/Installation [Awd]
CAUTION: Performing the following procedures without first removing the ABS wheel-speed sensor may possibly cause an open circuit in the wiring harness if it is pulled by mistake. Before performing the following procedures, disconnect the ABS wheel-speed sensor connector (body side) ...