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:
WARNING: Persons who fit into the
vehicle's seatbelt should not use an
extension. Unnecessary use could result
in serious personal injury in the event of a
crash.
WARNING: Only use extensions
provided free of charge by our dealers.
The dealer will provide an extension
designed specifically for this vehicle, model
year and seating position...
System Operation
Lane Keeping Alert and Lane Keeping Aid
Item
Description
1
Lane Keeping System Switch
2
IPMA
3
GWM
4
Camera Windshield Defrost Heater
5
RCM
6
SCCM
7
PCM
8
IPC
9
TRM
10
BCM
11
PSCM
12
with active cruise control
13
CCM
14
Windshield
Network Message Chart
Module Network Input Messages - IPMA
Broadcast Message
Originating Module
Message Purpose
Ambient air temperature filtered
PCM
Used to control the camera windshield defrost heater operation...