Mazda 2004 RX-8, Особенности сервиса

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ELECTRIC POWER STEERING (EPS)
06–13–5
06–13
Function of Component Parts
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STEERING GEAR AND LINKAGE CONSTRUCTION
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•
The steering gear and linkage consists of the steering rack, pinion shaft, EPS motor, ball screw and torque
sensor.
•
The steering rack, which has a threaded groove, is inserted through the center of the EPS motor. The rotation
of the EPS motor (assist force) is transmitted via the balls inside the ball screw directly to the steering rack.
•
The torque sensor, which detects the steering force, is installed on the pinion shaft.
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Part name Function
Steering gear and
linkage
Torque sensor
•
Detects the steering force signal and inputs it to the EPS control
module.
EPS motor
•
Generates an assist force based on the control current from the
EPS control module.
EPS control module
•
Determines the control current for the EPS motor based on the
steering force signal from the torque sensor, vehicle speed signal
from the PCM and other signals.
•
Inputs an idle increase request signal to the PCM via CAN
communication lines.
•
Controls the on-board diagnostic system and fail-safe function
when an abnormality is detected in the EPS system.
PCM
Vehicle speed signal
•
Inputs the vehicle speed signal to the EPS control module via CAN
communication lines.
Engine speed signal
•
Inputs the engine speed signal to the EPS control module via CAN
communication lines.
Instrument cluster EPS warning light
•
The light illuminates to inform the driver when a system malfunction
is detected.
BALL SCREW
PINION SHAFT
TORQUE SENSOR
STEERING RACK
EPS MOTOR
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