Lincoln Aviator: Vehicle Dynamic Suspension / Description and Operation - Vehicle Dynamic Suspension - System Operation and Component Description
System Operation
System Diagram
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| Item | Description |
|---|---|
| 1 | VDM |
| 2 | LH front valve solenoid |
| 3 | PSCM |
| 4 | PCM |
| 5 | ABS module |
| 6 | LH front height sensor |
| 7 | RH front height sensor |
| 8 | LH rear height sensor |
| 9 | RH rear height sensor |
| 10 | BCM |
| 11 | RH front valve solenoid |
| 12 | LH rear valve solenoid |
| 13 | RH rear valve solenoid |
| 14 | IPC |
| 15 | RCM |
| 16 | GWM |
Network Message Chart
Module Network Input Messages - VDM
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| ABS active | ABS module | Indicates the current ABS activity, on or off. |
| Accelerator pedal position | PCM | This message is sent to the GWM and then to the VDM. Indicates the current accelerator pedal position. |
| Ambient air temperature | PCM | This message is sent to the GWM and then to the VDM. Indicates the current ambient air temperature. |
| Driven wheel torque request | PCM | This message is sent to the GWM and then to the VDM. Indicates the current amount of powertrain output requested by the PCM. |
| Engine RPM | PCM | This message is sent to the GWM and then to the VDM. Indicates the current engine speed in revolutions per minute. |
| Fuel level | IPC | This message is sent to the GWM and then to the VDM. Indicates the current vehicle fuel level as a percentage. |
| Gear lever position | PCM | This message is sent to the GWM and then to the VDM. Indicates the current transmission gear status. Used to determine the amount of dampening required during vehicle operation. |
| Ignition status | BCM | This message is sent to the GWM and then to the VDM. Indicates if the current ignition status is off, accessory, run, start, invalid or unknown. |
| Life cycle mode | BCM | This message is sent to the GWM and then to the VDM. Indicates if the current vehicle life cycle is normal, factory, not used or transport. |
| Message center display | IPC | This message is sent to the GWM and then to the VDM. Indicates if the vehicle is equipped with a message center and indicates the current status of the message center. |
| Message center feature configuration | IPC | This message is sent to the GWM and then to the VDM. Indicates if the vehicle is equipped with a message center configuration. |
| Odometer value | IPC | This message is sent to the GWM and then to the VDM. Indicates the current odometer value in kilometers. |
| Powertrain torque status | PCM | This message is sent to the GWM and then to the VDM. Indicates the current status of the powertrain; power pack off torque not available, power pack on torque not available, start in progress torque not available and power pack on torque available. |
| Stability control brake active | ABS module | Indicates if the current ESC activity is on or off. |
| Steering wheel angle sensor | PSCM | Indicates the current steering wheel angle relative to the straight ahead position and the number of complete 360 degree revolutions. |
| Traction control mode | ABS module | Indicates if the current traction control activity is on or off. |
| Vehicle configuration data | BCM | This message is sent to the GWM and then to the VDM . Indicates the current vehicle configuration and optional equipment. |
| Vehicle lateral acceleration | ABS module | Indicates the current lateral acceleration as measured byRCM sensors and relayed by the ABS module. |
| Vehicle lateral acceleration | RCM | Indicates the current lateral acceleration as measured byRCM sensors. |
| Vehicle longitudinal acceleration | ABS module | Indicates the current longitudinal acceleration as measured byRCM sensors and relayed by the ABS module. |
| Vehicle longitudinal acceleration | RCM | Indicates the current longitudinal acceleration as measured byRCM sensors. |
| Vehicle roll rate | ABS module | Indicates the current roll rate as measured byRCM sensors and relayed by the ABS module. |
| Vehicle roll rate | RCM | Indicates the current roll rate as measured byRCM sensors. |
| Vehicle speed | PCM | This message is sent to the GWM and then to the VDM. Indicates the current vehicle speed in kilometers per hour. |
| Vehicle yaw rate | ABS module | Indicates the current yaw rate as measured byRCM sensors and relayed by the ABS module. |
| Vehicle yaw rate | RCM | Indicates the current yaw rate as measured byRCM sensors. |
Vehicle Dynamic Suspension
The VDM is connected to the HS-CAN to communicate with the ABS module, the PCM and other modules. With the information received the VDM monitors the heave, roll, pitch, cornering, braking and acceleration of the vehicle. Based on this information the VDM calculates the best action for each valve solenoid.
Once the valve solenoid is energized, the damping increases with the PWM duty cycle. At minimum current the damping is less than when maximum current is applied. The damper and valve solenoid have been designed so failure leads to a firm ride. The fail-safe level of damping is at a level equivalent to what is produced at higher currents, but it is not the same as the maximum current.
When the VDM is initialized (ignition on), it carries out a preliminary electrical check of the height sensors, height sensor circuits, valve solenoids and valve solenoid circuits. Any malfunction detected in the system causes the VDM to set a DTC (diagnostic trouble code) and send a message over the HS-CAN2 to the GWM . The GWM then sends a message to the IPC over the HS-CAN3 and the IPC responds by displaying a message in the message center.
Component Description
Height Sensor
The height sensor uses a potentiometer to send a variable amount of voltage back to the VDM. The sensor has 3 circuits, one circuit is for the 5 volt sensor supply, one circuit is for sensor ground and one circuit is for the sensor output.
Valve Solenoid
The VDM uses a PWM output to control the valve solenoid. The solenoid opens or closes the valve depending on the amount of current supplied by the VDM. The higher the current, the more the valve is opened, resulting in a higher level of damping.
Vehicle Dynamics Control Module (VDM)
The VDM monitors all sensor inputs and all HS-CAN messages that relate to the vehicle dynamic suspension and then directly controls the valve solenoids. The VDM sends an individual electrical current to each valve solenoid to control the amount of damping required.
TheVDM requires calibration when any of the following components is installed new, disassembled, disconnected or removed.
- VDM
- Suspension height sensor
- Front lower control arm
- Front strut assembly
- Rear lower control arm
- Rear shock
The calibration procedure is carried out using the diagnostic scan tool and required for the system to learn the zero-position of the vehicle.
Before performing the calibration procedure:
- Be sure the vehicle is on a level surface.
- The vehicle must not be moving.
- No occupants in the vehicle.
- Make sure the suspension is in a neutral position if it was recently lowered. To neutralize the suspension, drive the vehicle a short distance, such as around a parking lot.
Description and Operation - Vehicle Dynamic Suspension - Vehicles With: Air Suspension - System Operation and Component Description
System Operation
System Diagram
Item
Description
1
HS-CAN2
2
HS-CAN1
3
HS-CAN3
4
SUMA and Air Compressor Assembly
5
LHF Air Spring Solenoid
6
PSCM
7
PCM
8
ABS
9
LHF Height Sensor
10
RHF Height Sensor
11
LHR Height Sensor
12
RHR Height Sensor
13
BCM
14
RHF Air Spring Solenoid
15
LHR Air Spring Solenoid
16
RHR Air Spring Solenoid
17
IPC
18
RCM
19
GWM
Network Message Chart
Module Network Input Messages - SUMA
Broadcast Message
Originating Module
Message Purpose
ABS active
ABS module
Indicates the current ABS activity, on or off...
Other information:
Lincoln Aviator 2020-2025 Service Manual: Diagnosis and Testing - Cruise Control - Vehicles With: Adaptive Cruise Control With Lane Centering
Diagnostic Trouble Code (DTC) Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation). Diagnostic Trouble Code Chart Module DTC Description Action CCM B142E:78 Forward Looking Sensor Horizontal Alignment: Alignment or Adjustment Incorrect GO to Pinpoint Test C CCM B1433:54 Forward Looking Sensor Horizontal Alignment: Missing Calibration GO to Pinpoint Test C CCM C1001:08 Vision System Camera: Bus Signal/Message Failure GO to Pinpoint Test D CCM C1A67:96 Forward Looking Sensor: Component Internal Failure GO to Pinpoint Test F CCM C1A67:97 Forward Looking Sensor: Component Or System Operation Obstructed Or Blocked GO to Pinpoint Test G CCM U2100:00 Initial Configuration Not Complete: No Sub Type Information GO to Pinpoint Test H CCM U2300:55 Central Configuration Not Complete: No Sub Type Information GO to Pinpoint Test H CCM U3000:41 Control Module: General Checksum Failure GO to Pinpoint Test I CCM U3000:42 Control Module: General Memory Failure GO to Pinpoint Test I CCM U3000:44 Control Module: Data Memory Failure GO to Pinpoint Test I CCM U3000:49 Control Module: Internal Electronic Failure GO to Pinpoint Test I CCM U3002:62 Vehicle Identification Number: Signal Compare Failure GO to Pinpoint Test J CCM U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test K CCM U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test L IPMA C1A67:08 Forward Looking Sensor: Bus Signal/Message Failure GO to Pinpoint Test E PCM P0504:00 Brake Switch A / B Correlation: No Sub Type Information GO to Pinpoint Test B PCM P0572:00 Brake Switch "A" Circuit Low: No Sub Type Information GO to Pinpoint Test B PCM P0573:00 Brake Switch "A" Circuit High: No Sub Type Information GO to Pinpoint Test B PCM P1703:00 Brake Switch Out Of Self - Test Range: No Sub Type Information GO to Pinpoint Test B PCM P1935:00 Brake Switch/Sensor Signal: No Sub Type Information GO to Pinpoint Test B SIMA P0564:11 Cruise Control Multi-Function Input "A" Circuit: Circuit Short To Ground GO to Pinpoint Test A SIMA P0564:12 Cruise Control Mulit-Function Input "A" Circuit: Circuit Short To Battery GO to Pinpoint Test A SIMA P0564:13 Cruise Control Mulit-Function Input "A" Circuit: Circuit Open GO to Pinpoint Test A SIMA P0589:11 Cruise Control Multi-Function Input "B" Circuit: Circuit Short To Ground GO to Pinpoint Test A SIMA P0589:12 Cruise Control Mulit-Function Input "B" Circuit: Circuit Short To Battery GO to Pinpoint Test A SIMA P0589:13 Cruise Control Mulit-Function Input "B" Circuit: Circuit Open GO to Pinpoint Test A Global Customer Symptom Code (GCSC) Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices...
Lincoln Aviator 2020-2025 Service Manual: Removal and Installation - Liftgate
Removal NOTE: Removal steps in this procedure may contain installation details. Remove the liftgate trim panel. Refer to: Liftgate Trim Panel (501-05 Interior Trim and Ornamentation, Removal and Installation). Lower the headliner...
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Children and Airbags
WARNING: Airbags can kill or injure a child in a child restraint. Never place a rear-facing child restraint in front of an active airbag. If you must use a forward-facing child restraint in the front seat, move the seat upon which the child restraint is installed all the way back.
