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:
BXXXX:4A (any BXXXX DTC with a 4A failure type) Incorrect Component Installed
Normal Operation and Fault Conditions
The RCM monitors all SRS device connections. If the RCM detects a
device connected that is not stored in memory or is not configured for
the component, the RCM sets a DTC and sends a message to the IPC to
illuminate airbag warning indicator.
DTC Fa..
Special Tool(s) /
General Equipment
Wheel Alignment System
Adjustment
NOTE:
Make sure that the vehicle is standing on a level surface.
Using alignment equipment and the manufacturer's instructions, check the front toe setting on both sides.
Use the General Equipment: Wheel Alignment System
..
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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