Lincoln Navigator: Instrumentation, Message Center and Warning Chimes / Head Up Display (HUD) - System Operation and Component Description. Description and Operation

System Operation

System Diagram

*.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } 1 SODx 2 CCM 3 LH Steering Wheel Switches 4 RH Steering Wheel Switches 5 Rain Sensor 6 PCM 7 IPMA 8 BCM 9 SCCM 10 FCIM 11 GWM 12 IPC 13 APIM 14 ACM 15 HUD Module E367136

Item	Description
1	Side Obstacle Detection Control Module x (SODx)
2	CCM
3	LH steering wheel switches
4	RH steering wheel switches
5	Rain sensor
6	PCM
7	IPMA
8	BCM
9	SCCM
10	FCIM
11	GWM
12	IPC
13	APIM
14	ACM
15	HUD module

Network Message Chart

The displays that appear on the HUD are based on messaged inputs to the HUD module from the IPC or other network modules. The HUD module and the IPC communicate on the HS-CAN3 . If the originating module communicates on a network other than the HS-CAN3 , the messaged signals will be sent to the GWM first, then to the HUD module.

HUD Indication Or Display	Network Message	Originating Module	Originating CAN	Receiving Module
Audio display	Audio-navigation switch button states	SCCM	HS-CAN2	HUD module
	Audio system response status Audio source status	ACM APIM (China only)	HS-CAN3
BLIS / CTA	Side obstacle sensor status-left Side obstacle left warning Cross traffic alert left status	IPMA	FD-CAN	HUD module
	Side obstacle sensor status-right Cross traffic alert right status
Clock	Global clock data	BCM	HS-CAN1	HUD module
Cruise control/ACC with stop and go	Cruise control override Cruise control set speed Cruise control status	PCM	FD-CAN	HUD module
	Adaptive cruise control follow mode display Adaptive cruise control message display Adaptive cruise control target distance display Adaptive cruise control gap distance display Adaptive cruise control warning request	IPMA	FD-CAN	HUD module
	Adaptive cruise control stop mode Adaptive cruise control stop status display Adaptive cruise control resume display	IPMA	FD-CAN	HUD module
Distance indication	Adaptive cruise control target distance display	IPMA	FD-CAN	HUD module
DTE	Fuel range display Fuel level warning	IPC	HS-CAN3	HUD module
English/Metric language unit selections	Language selection Temperature unit selection Trip unit selection	IPC	HS-CAN3	HUD module
HUD adjustment	Steering wheel message center switch data	SCCM	HS-CAN2	HUD module
	HUD settings active	IPC	HS-CAN3
HUD brightness	Day/night status Illumination dimming level	BCM	HS-CAN1	HUD module
	Ambient light sensor data Ambient light sensor status	SCCM	HS-CAN2
Highway assist	Traffic jam assist status Traffic jam assist warning request	IPMA	FD-CAN	HUD module
Lane centering aid	Traffic jam assist status	IPMA	FD-CAN	HUD module
Lane keeping assist	Camera configuration Lane keeping system status display	IPMA	FD-CAN	HUD module
Navigation	Audio-navigation switch button states	SCCM	HS-CAN2	HUD module
	Audio system response status Audio source status	ACM APIM (China only)	HS-CAN3
Outside air temperature	Outside air temperature	FCIM	MS-CAN	HUD module
Phone	Voice recognition status	APIM	HS-CAN3	HUD module
Speed display (digital speedometer)	Metric display Vehicle speed display	IPC	HS-CAN3	HUD module
Speed sign recognition	Traffic sign recognition status request	IPMA	FD-CAN	HUD module
Transmission gear indication	Transmission gear display Transmission gear display mode	PCM	FD-CAN	HUD module
Turn indicator (LH / RH )	Left turn lamp on request Right turn lamp on request	BCM	HS-CAN1	HUD module

HUD

NOTE: Whenever the HUD is removed and reinstalled, the instrument panel is removed and reinstalled or replaced, a new HUD is installed or a new windshild is installed, the HUD must be calibrated to correctly display the image on the windshield The HUD module calibration is carried out using the engineering test mode.

For addtional information,
Refer to: Head Up Display (HUD) Module Calibration (419-03B Collision Warning and Collision Avoidance System, General Procedures).

Brightness Controls

The HUD display illumination is controlled by two sets of inputs: the base HUD background and driver selectable illumination level. The base HUD background display uses ambient day/nighttime lighting input, ambient lighting of the road ahead of the vehicle and an overall vehicle backlighting dimming level to determine the display illumination level. The driver then has the ability to select a desired illumination level from 1 to 13, which is selectable through the HUD menu. When a forward collision warning event is in progress, the illumination intensity is increased to provide an increased level of severity to the visual warning.

The HUD module uses the following inputs to control the illumination brightness:

• ambient light sensor data.
• ambient light sensor status.
• day/night status.
• HUD brightness menu.
• illumination dimming level.

The base HUD background brightness is determined by the day/night status and the illumination dimming level messages sent from the BCM .

The HUD also uses the ambient light sensor status and the ambient light sensor data messages sent from the SCCM to establish a base illumination level.

Once the HUD has established a base illumination level, the driver can then select a desired illumination level. When the driver has selected to change the intensity level, the HUD module receives the HUD brightness menu message from the IPC .

Display Adjustments

The HUD provides adjustment settings to allow the driver to reposition the display on the windshield to provide better viewing. The adjustments allow for vertical and rotational adjustments through the HUD menu.

Display Controls

The HUD display controls are through the RH steering wheel switch (HUD, back and settings buttons). The HUD module receives all switch control inputs from the SCCM .

Engineering Test Mode

To enter the HUD engineering test mode (ETM), begin with the ignition OFF. Press and hold the RH steering wheel switch OK button. Place the ignition ON and continue to hold the button for approximately 10 seconds until the HUD displays ETM in the upper LH corner of HUD image. Release the OK button within 5 seconds of ETM being displayed. Press the up or down arrow buttons to navigate through each of the display windows. To exit the HUD engineering test mode, place the ignition in OFF.

English/Metric, Language And Unit Selections

The HUD English/metric, language and unit selections are controlled by messages sent from IPC . The IPC is the controlling module for the English/metric, language and unit selections and is based on the driver selections. The IPC and the HUD English/metric, language and unit selections are displayed the same.

HUD Displays

Advanced Driver Assist System

The active driver assist system display is located in the lower portion in the center of the HUD just above the speedometer display area.

The HUD provides the active driver assist display to indicate the following:

• cruise control or ACC status
• distance indication
• highway assist display
• lane centering aid display
• lane keeping system display
• stop and go (part of the ACC system) display

BLIS / CTA

The HUD provides BLIS and CTA indicators to warning the driver that a vehicle has entered the BLIS / CTA monitored zones. The BLIS / CTA indication is displayed in the LH and RH sides of the HUD . The display area is also shared with the LH , RH and hazard indication area. If the turn or hazard indicators are on and a BLIS / CTA alert is received, the HUD turns off the turn or hazard indication and displays the applicable BLIS / CTA warning.

Clock

The HUD provides a clock display that is controlled by a global vehicle clock strategy in the BCM . The clock is displayed in lower RH corner of the HUD .

Cruise Control/ACC And Stop And Go

The normal cruise control display provides the cruise control RTT indicator and the set speed display shown below it.

The ACC display provides the gap and follow distance (as a graphical distance display) as well as the set speed (shown below the ACC RTT indicator).

The stop and go feature (part of the ACC ) provides vehicle braking, stopping and accelerating based on the status of the vehicle in front. The display provides a graphical distance display with increasing or decreasing levels of fill depending on the vehicles distance from the followed vehicle.

Digital Speedometer

The HUD provides a digital speed display in the lower center of the display to indicate vehicle speed. When the digital speedometer is selected on in the HUD , the speedometer in the IPC only shows a minimal detail. The HUD module uses the vehicle speed display and metric display messages from the IPC to control the display.

Distance Indication

The advanced driver assist system display provides a distance indication as part of the ACC displays to indicate the distance to the vehicle in front and visually provide warning when the vehicle is too close. The graphical distance display on the road becomes a solid image that increases or decreases fill based on the distance to the vehicle in front. As the vehicle approaches a distance requiring an alert, the display fill turns from amber to red. Distance indication is part of the advanced driver assist system.

DTE - Low Fuel

The HUD provides a DTE display that ranges from 0 to 999 km/miles in the lower LH corner of the HUD . The display provides both the DTE and a low fuel warning that changes the fuel icon from white to amber. The HUD module uses the fuel range display and fuel level warning messages from the IPC to control the display.

Highway Assist

The HUD provides a steering wheel and a highway image in the LH side of the HUD , above the DTE display, to indicate the highway assist feature is active. The center display will show a vehicle and lane markings that will change colors from blue to amber to red on the each side of the lane to alert the driver intervention is required in order to maintain control of the vehicle. The highway assist system allows the driver to remove hands from the steering wheel for a limited period of time in certain driving conditions, while the vehicle maintains its position within the driving lane. The highway assist is part of the advanced driver assist system.

Infotainment-Navigation And Phone

The HUD provides audio, navigation and phone information. The HUD receives the audio-navigation switch button states message from the SCCM to control the audio-navigation displays. For additional audio, navigation and phone information,
Refer to: Information and Entertainment System - System Operation and Component Description (415-00 Information and Entertainment System - General Information - Vehicles With: SYNC 4, Description and Operation).

The HUD receives the voice recognition status message from the APIM ..

The HUD module receives the audio source status and audio system response status messages from the ACM (except China) and the APIM (China DuerOS only).

Lane Centering Aid

The HUD provides a center graphic with a steering wheel within lane markings, and a vehicle graphic if a follow vehicle is detected. The lane markings will change colors from blue to amber to red on each side of the lane to alert the driver to remain within the center of the drive lane. A message will pop up in the upper information bar to keep hands on steering wheel if the system detects the driver's hands are removed from the steering wheel. The lane centering aid is part of the advanced driver assist system.

Lane Keeping System

The lane keeping system combines the lane keeping alert and lane keeping assist systems. The lane keeping alert system alerts the driver of unintentional drifting outside of the lane and the lane keeping assist system corrects the vehicle steering to keep the vehicle in the center of the lane. The HUD provides a lane keeping display with a view of the vehicle in the middle of a lane with right and left lane markers to indicate the vehicle position with relation to the lane markings and arrows on either side of the vehicle. The lane markers and arrows change color based on the systems status with regard to vehicle position within the lane and any required intervention to keep the vehicle in the center of the lane. The lane keeping system is part of the advance driver assist system. For additional information on the lane keeping system operation,
Refer to: Lane Keeping System - System Operation and Component Description (419-07 Lane Keeping System, Description and Operation).

Outside Air Temperature

The HUD provides an outside air temperature display in the lower RH corner of the display above the clock display. The Ambient Air Temperature (AAT) sensor is hardwired to the PCM through separate input and return circuits. The PCM provides a reference voltage to the Ambient Air Temperature (AAT) sensor and monitors the change in voltage resulting from changes in resistance as determined by outside air temperature.

The PCM is programmed to update the messaged outside temperature data at different rates depending on several criteria (current engine temperature, engine off time and vehicle speed) to prevent false temperature displays due to a condition known as heat soaking. Heat soaking is where the outside air temperature is hotter in the location of the Ambient Air Temperature (AAT) sensor than the actual outside air temperature.

The PCM sends the ambient air temperature data to the FCIM . The FCIM sends the filtered ambient air temperatue data to the HUD module.

Speed Sign Recognition

The HUD provides a speed sign display based on the recognized speed limit sign on the current route the vehicle is traveling. The speed sign display indicates the speed limit recognized by the system as the current posted speed limit based on the last posted speed sign recognized. The HUD uses speed sign recognition data provided by the IPMA .

Transmission Gear Indication

The HUD provides the transmission gear indication display in the lower information bar, on the LH side of the digital speedometer. It indicates PRND or the SelectShift gear position (1-10), as selected by the driver.

Turn Signal (LH / RH And Hazard)

The LH , RH turn and hazard indication displayed in the HUD is redundant to the LH , RH turn and hazard indication displayed in the IPC . The HUD displays the LH , RH turn and hazard indication in the upper LH and RH sides of the HUD screens. The display area is also shared with the BLIS indication, which takes precedence over the turn or hazard indication.

Component Description

HUD Module

The HUD provides the driver with an alternative to view driver information and forward collision warnings. The HUD module receives all messages on the HS-CAN3 . Whenever a new HUD is installed, the HUD requires a PMI .

Whenever the HUD is removed and reinstalled, the instrument panel is removed and installed or replaced, a new HUD is installed or a new windshield is installed, the HUD module must be calibrated to correctly display the image on the windshield.
Refer to: Head Up Display (HUD) Module Calibration (419-03B Collision Warning and Collision Avoidance System, General Procedures).

HUD Control Switches

The HUD functions are controlled through the HUD button in the RH lower steering wheel switch and the up, down and back buttons in the upper RH steering wheel switch. The RH steering wheel switch uses different resistance values associated with each specific button. The SCCM sends out a reference voltage to the RH steering wheel switch on the input circuit and monitors the voltage drops. The voltage drop varies depending upon the resistance of the specific button pressed, providing indication to the SCCM which button is pressed.