Chevrolet Spark manuals

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

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

Purpose/ Function

Function Table


Control item

Function

EPS motor current control

  • Normal control

    • Calculates the proper assist current based on the steering torque, and the vehicle and engine speeds, and outputs a target current to the EPS motor.

  • System overheating protection control

    • Monitors the temperature of the motherboard in the EPS CM and controls the motor voltage gradually to prevent overheating of the system.

  • Backup control

    • Even if a phase 1 open circuit malfunction in the EPS motor occurs, output current to the EPS motor is controlled so that steering assist is maintained.

On-board diagnostic function

  • The main part of the system control includes the self-diagnosis function. In case a malfunction occurs, the power steering malfunction indicator light/master warning light illuminates to alert the driver, and a DTC is stored in the EPS CM at the same time.

  • As a result of the on-board diagnosis, when a malfunction is determined, system control is suspended or limited to assure safety while driving.

CAN communication function

  • Outputs the EPS status signal and power steering malfunction indicator light illuminates on request via CAN lines.

Automatic configuration function

  • When the ignition is switched to ON or the engine is started after the EPS CM have been replaced, the EPS CM reads data from the instrument cluster via CAN communication to perform automatic configuration.

Steering wheel angle neutral position automatic learning function

  • When the ignition is switched from OFF to ON and the vehicle is driven normally, the steering wheel angle neutral position is detected automatically based on the signal from the torque sensor.


Block Diagram


NOTE:

Construction

Operation

EPS Motor Current Control

Fail-safe


DTC No.

Fail-safe function

U2300:54

  • Control enabled

  • Power steering malfunction indicator light: Not illuminated

U2300:55

  • Control enabled

  • Power steering malfunction indicator light: Illuminated

U2300:56

  • Control enabled

  • Power steering malfunction indicator light: Not illuminated

U3000:16

  • Control disabled

  • Power steering malfunction indicator light: Illuminated

U3000:1C

U3000:28

U3000:41

U3000:46

  • Control is maintained in fail mode

  • Power steering malfunction indicator light: Not illuminated

U3000:47

  • Control disabled

  • Power steering malfunction indicator light: Illuminated

U3000:49

U3000:4B

  • Control is maintained in fail mode

  • Power steering malfunction indicator light: Not illuminated

U3000:61

  • Control disabled

  • Power steering malfunction indicator light: Illuminated

U3000:73

U3000:96

U3003:16

  • Control is maintained by gradually decreasing the motor control current

    • However, control is inhibited if the power supply voltage is the specified value of less

  • Power steering malfunction indicator light: Illuminated

U3003:17

  • Control disabled

  • Power steering malfunction indicator light: Illuminated


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 ...

Other materials:

High Mount Brake Light Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the liftgate upper trim.. 3. Remove the rear spoiler.. 4. Disconnect the connector. 5. While pressing the high-mount brake light tab in the direction of arrow (1) shown in the figure, press the high-mount brake light in the direction ...

Lap Pre Tensioner Seat Belt [Two Step Deployment Control System]
Purpose The lap pre-tensioner seat belts retract and tighten the seat belt webbing to protect the front passengers during a collision. Function The lap pre-tensioner seat belts operate (deploy) based on the operation signal from the SAS control module to instantly retract a ...

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 ...

© 2016-2022 Copyright www.mcx5.org