Lincoln Aviator: Power Steering / Description and Operation - Power Steering - Overview
Overview
The EPAS
system provides steering assist by replacing the conventional hydraulic
valve system with a steering gear equipped with an integrated
electrical motor and PSCM. The motor operation and level of steering assist provided is controlled by the PSCM.
System Operation
System Diagram
Item
Description
1
SECM
2
ECU
3
Private CAN
4
IPMA
5
SIMA
6
PSCM
7
GWM
8
Locking solenoid
9
SASM
10
BCM
11
PCM
12
IPC
13
SUMA
14
RCM
15
Motor
16
HVAC module
17
APIM
Network Input Message Chart
SECM Network Input Messages
Broadcast Message
Originating Module
Message Purpose
Active front steering request
PSCM
Requests steering angle changes for stability control events...
System Operation
System Diagram
Item
Description
1
EPAS gear
2
EPAS motor
3
EPAS position sensor
4
EPAS torque sensor
5
PSCM
6
GWM
7
PCM
8
IPC
9
BCM
10
RCM
11
ABS
12
IPMB
13
IPMA
14
PAM
15
SASM
16
SCCM
17
SUMA
Network Message Chart
PSCM Network Input Messages
Broadcast Message
Originating Module
Message Purpose
Anti-lock brake control activated
ABS module
Informs the PSCM an anti-lock brake event is taking place...
Other information:
For recommended metal repair guidelines and recommendations, refer to the following illustrations and: For additional information, refer to: Specifications (501-25 Body Repairs - General Information, Specifications).
Steel Type Legend
Item
Steel Type
Color
1
Mild Steel
Yellow
2
Bake Hardened Steel (BH)
Light Blue
3
Solid Solution Strength
Pink
4
High Strength Low Alloy (HSLA)
Dark Blue
5
Dual Phase (DP) 500, 600 Class Steel
Green
6
Dual Phase (DP) 700, 800, 900, 1000 Class Steel
Fuchsia
7
Laminate Steel
Teal
8
Ultra High Strength Steel (UHSS) Martensitic, Boron
Red
9
Transformation Induced Plasticity Steel (TRIP)
Gold
10
Aluminum
Purple
Front Structure
Item
Description
Steel Type
1
Radiator support
Magnesium alloy
2
Bracket
High-Strength Low Alloy (HSLA) 350 steel
3
Bracket
Aluminum alloy
4
Suspension housing
Aluminum alloy
5
Reinforcement
High-Strength Low Alloy (HSLA) 350 steel
6
Reinforcement
Boron and Dual Phase (DP) 600 steel
7
Reinforcement
Boron and Dual Phase (DP) 600 steel
8
Bracket
Aluminum alloy
9
Side member assembly
Aluminum alloy
10
Fender apron tube
Dual Phase (DP) 800 steel
Front Bumper
Item
Description
Steel Type
1
Bumper assembly
High strength aluminum
Dash Panel and Front Fenders
Item
Description
Steel Type
1
Crossmember
Boron steel
2
Dash panel
Mild steel
3
Cowl top panel
Mild steel
4
Reinforcement
Dual Phase (DP) 800 steel
5
Front crossmemembr extension
Dual Phase (DP) 600 steel
6
Reinforcement
Dual Phase (DP) 800 steel
7
Fender assembly (LH/RH)
Bake Hardened (BH) 210 steel
8
Bracket
Mild steel
Body Side Inner Panels
NOTE:
Left hand (LH) side shown, right hand (RH) side similar...
System Operation
System Diagram
Item
Description
1
RFA module
2
BCM
3
GWM
4
TCU
5
Bluetooth Antennas
Network Message Chart
RFA Module Network Input Messages
Broadcast Message
Originating Module
Message Purpose
BLEM Wait For Key Alert
TCU
The TCU sends the RFA module (also know as BLEM) an error message to restart the provisioning process with the onboard modules over again...
Categories
The front outboard and rear safety restraints
in the vehicle are combination lap and
shoulder belts.
Insert the belt tongue into the proper
buckle (the buckle closest to the direction
the tongue is coming from) until you hear
a snap and feel it latch. Make sure that
you securely fasten the tongue in the
buckle.

To unfasten, press the release button
and remove the tongue from the buckle.
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