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:
Check
NOTE:
If there is a concern with one of the following components
and Bezel Diagnostics cannot be accessed, obtain the module part number
or ESN by referencing the label attached to the module.
Inoperative ACM
Inoperative (blank or does not power on) display unit (non-touchscreen display or touchscreen display)
Inoperative FCIM or radio control panel
..
Removal
All vehicles
NOTE:
Removal steps in this procedure may contain installation details.
Remove the rear bumper cover.
Refer to: Rear Bumper Cover (501-19 Bumpers, Removal and Installation).
4-Door
Remove the nuts and the rear bumper.
Torque:
18..
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
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