Ford Fiesta: Power Steering / Power Steering - Overview. Description and Operation
Overview
The EPAS
system provides steering assist to the driver by replacing the
conventional, hydraulic pump system with an electric motor coupled to
the steering shaft. The system is controlled by the PSCM
which senses the steering effort using sensors mounted between the
steering column shaft and the steering gear. Steering assist is provided
in proportion to steering effort and vehicle speed.
System Operation
System Diagram
Item
Description
1
EPAS column
2
HS-CAN
3
EPAS motor
4
Steering shaft position sensor
5
Steering shaft torque sensor
6
PSCM
7
IPC
8
ABS module
9
PCM
Network Message Chart
..
Other information:
Item
Part Number
Description
1
21402140
Brake fluid master cylinder
2
2K4782K478
Brake fluid filling reservoir
3
7A5437A543
Clutch master cylinder
4
75197519
Clutch pedal
5
7K5027K502
Clutch reservoir hydraulic tube
6
7A5647A564
Clutch slave cylinder
7
7A5127A..
Introduction
WARNING:
Before beginning any service procedure in this manual, refer
to health and safety warnings in section 100-00 General Information.
Failure to follow this instruction may result in serious personal
injury.
For additional information, refer to: Health and Safety Precautions (100-00 General Information, Description and Operation).
This
manual ..
Categories
Preliminary Inspection
Verify the customer concern by carrying out a road test on a
smooth road. If any vibrations are apparent, Refer to the Symptom
Chart: NVH.
To maximize tire performance, inspect for signs of incorrect
inflation and uneven wear, which may indicate a need for balancing,
rotation or front suspension alignment.
Correct tire pressure and driving techniques have an
important influence on tire life. Heavy cornering, excessively rapid
acceleration and unnecessary sharp braking increase tire wear.
Correct
tire pressure and driving techniques have an important influence on
tire life. Heavy cornering, exce
read more