Lincoln Aviator: Instrumentation, Message Center and Warning Chimes / Description and Operation - Message Center - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

  Module Network Input Messages - IPC

  Module Network Input Messages - PCM

Message Center Displays

ACC

The ACC display provides the gap and follow distance (as a graphical distance display with bars on the road) as well as the set speed (shown above the ACC RTT indicator).

The stop and go feature (part of the ACC) provides message displays to indicate the vehicle is stopped and to press resume to engage the cruise control again.

The IPC receives the cruise control set speed display and the adaptive cruise control gap distance display messages from the GWM over the HS-CAN3. The GWM receives the cruise control set speed display message from the PCM over the HS-CAN1. The GWM receives the adaptive cruise control gap distance display message from the IPMA over the HS-CAN2.

Brake Coach Display (PHEV)

The brake coach display appears in the message center after the vehicle has come to a complete stop. It coaches the driver to brake in a manner which maximizes the amount of energy returned through the regenerative braking system. The percent displayed is an indication of the regenerative braking efficiency with 100% representing the maximum amount of energy recovery. The brake coach display can be enabled or disabled through the message center settings.

The IPC receives the brake event data and regenerative braking event level data messages from the GWM over the HS-CAN3. The GWM receives the brake event data and regenerative braking event level data messages from the PCM over the HS-CAN1.

Compass Display

On the IPC, the compass is displayed in the message center as a 1 or 2 character display to indicate the current direction of the vehicle (N, NE, E, SE, S, SW, W, or NW). The IPC receives the compass direction from the APIM over the HS-CAN3.

Digital Speedometer

The IPC provides a digital speedometer display to indicate vehicle speed in a digital format. The digital speedometer display operates using the same vehicle speed input used to control the cruise control set speed display.

The IPC receives the cruise control set speed display message from the GWM over the HS-CAN3. The GWM receives the cruise control set speed display message from the PCM over the HS-CAN1.

DTE

The DTE is calculated in the PCM using the Running Average Fuel Economy (RAFE), which is the fuel economy up to 400 km (250 miles), and the fuel level input from the fuel sender to determine how many kilometers (miles) the vehicle can be driven based on the remaining fuel in the tank. The DTE displayed value can increase, or decrease, or stay the same value depending on customer driving patterns.

The Running Average Fuel Economy (RAFE) is not transmitted over the CAN, however the IPC will show an invalid Running Average Fuel Economy (RAFE) value in Engineering Test Mode. The DTE can vary in the short term by up to 80 km (50 miles), but is usually within 16 km (10 miles). Even if the fuel economy is relatively constant, the DTE can be off over a 80 km (50 mile) range by -24% to +38%.

The DTE display and the fuel gauge both use the fuel level input from the fuel tank and engine fuel consumption to provide their respective functions. If the fuel gauge doesn't function correctly, both the fuel gauge and the DTE display are affected.

If the DTE does not function correctly and the fuel gauge is correct, then Running Average Fuel Economy (RAFE), odometer or vehicle speed related input can be invalid.

The PCM defaults to a preset baseline L/100km (mpg) when the keep alive memory is reset or PCM is flashed and changes afterward based on driving habits and conditions.

NOTE: The customer calculated DTE can be higher or lower than the DTE displayed in the message center due to changes in driving conditions. It is important to understand how the DTE is calculated and the factors that impact the DTE display when determining how to address any DTE concerns.

Since the DTE is calculated and averaged over a longer period of time (400 km [250 miles]), varying driving conditions can have a significant impact on the current or short term DTE as opposed to the displayed DTE. This difference often leads to customer complaints of incorrect or invalid DTE. The following list provides some (not all) of the driving conditions that may lead to an incorrect or fluctuating DTE concern:

• Changing between towing/not towing.
• Changing driving between city and highway.
• Allowing the vehicle to idle for long periods of time.
• Using the remote start feature frequently to allow the vehicle to warm up, particularly when parked on a grade.
• Parking or driving on grades.
• Inconsistent use of gasoline or E85 fuels.
• Over-fueling or not filling the tank completely (trickle filling at above full, partial filling with less than 10% of tank capacity).

The PCM uses the following network messages to control the DTE.

• Fuel alcohol percent
• Fuel flow volume display
• Odometer count
• Transport mode
• Fuel level input from the IPC

The IPC receives all messages from the GWM over the HS-CAN3. The GWM receives the transport mode message from the BCM over the HS-CAN1 and the fuel alcohol percent, fuel flow volume display and the odometer count messages from the PCM over the HS-CAN1.

Electric Vehicle (EV) Range Display (PHEV)

The IPC provides a message center display indicating the estimated distance the vehicle can travel with the energy currently available. Estimates will vary based on the energy used while driving. Changes in driving patterns can cause the values to increase, decrease or remain constant for extended periods of time.

The electric range display indicates the estimated distance the vehicle can travel on electric power only, with the engine off. The IPC receives the hybrid mode status display message from the GWM over the HS-CAN3. The GWM receives the hybrid mode status display message from the PCM over the HS-CAN1.

The gasoline engine display indicates the estimated distance to empty based on the remaining fuel in the tank. Refer to DTE in this section.

Engine Oil Life Message Center Display

The IPC provides message center messages to inform the driver about the engine oil life status and when an engine oil change is required. The duration of the interval between engine oil changes is calculated in the PCM and varies due to driving conditions. The PCM assumes a base mileage of 16,090 km (10,000 mi) or 1 year for normal driving. However, this number is adjusted down for conditions such as high engine temperature, high engine rpm, use of flex fuel and possibly low engine oil level. The PCM calculates and provides the engine oil life percent message to the IPC. The engine oil change minder can be reset at any time by the driver.

The PCM receives the engine oil life data reset request from the GWM over the HS-CAN1. The GWM receives the engine oil life data reset request from the IPC over the HS-CAN3.

The IPC receives the engine oil life message from the GWM over the HS-CAN3.

The GWM receives the engine oil life message from the PCM over the HS-CAN1.

Factory-Transport Mode Display

During vehicle build, some modules, such as the IPC and the BCM, are set in factory mode. While in the factory mode the IPC displays FACTORY MODE CONTACT DEALER in the message center. If the vehicle is set in factory mode, the system does not automatically exit the mode and must be manually set to either the transport or normal operation mode.

When the vehicle build is complete, the vehicle is set to transport mode. While in transport mode, the IPC displays TRANSPORT MODE CONTACT DEALER in the message center. Transport mode is used to reduce the drain on the battery during longer periods where the vehicle is not used. Various systems may be altered or are disabled when in the transport mode. The vehicle automatically reverts to normal operation mode after being driven 80 km (50 mi).

The IPC receives the factory mode and transport mode messages from the GWM over the HS-CAN3. The GWM receives the factory mode and transport mode messages from the BCM over the HS-CAN1.

Forward Collision Warning Alert Display

When the pre-collision alert system detects that a forward collision is possible or imminent, the IPC provides a forward collision warning alert in the message center along with a chime, to alert the driver to take evasive action, or to prepare for the vehicle's auto-braking system to slow or stop the vehicle. The IPC receives the forward collision warning indicator request message from the GWM over the HS-CAN3. The GWM receives the forward collision warning indicator request message from the IPMA over the HS-CAN2.

Lane Centering Assist

The lane centering assist system is part of adaptive cruise control. The system uses inputs from the IPMA and CCM to help keep the vehicle within the lane markings. The IPC provides message center warning messages to alert the driver to system status. The IPC receives the traffic jam assist status, traffic jam assist message request and traffic jam assist warning request messages from the GWM over the HS-CAN3. The GWM receives the traffic jam assist status, traffic jam assist message request and traffic jam assist warning request messages from the IPMA.

Lane Keeping System

The lane keeping system combines the lane keeping alert and lane keeping aid systems. The lane keeping alert system alerts the driver of unintentional drifting outside of the lane and the lane keeping aid system corrects the vehicle steering to keep the vehicle in the center of the lane. The IPC 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. The lane markers change color based on the systems status with regard to vehicle intervention to keep the vehicle in the center of the lane and provides warning messages to alert the driver when they are drifting out of their lane or need to place their hands on the steering wheel

The IPC receives both the lane keeping system status display message and the lane keeping system switch status message from the GWM over the HS-CAN3.

The GWM receives the lane keeping system status display message and the lane keeping system switch status message from the IPMA over the HS-CAN2.

Message Center, Audio, HUD (If Equipped) And Navigation Menus

The IPC provides message center, audio, HUD (if equipped) and navigation menus. When a menu is selected, the selected menu may temporarily replace a display to provide the driver with the ability to navigate the selected menu. Once the driver has exited the menu selection, the previously selected displays return.

The message center is controlled through the RH steering wheel switch. The IPC receives the steering wheel message center switch data from the GWM over the HS-CAN3. The GWM receives the steering wheel message center switch data from the SCCM over the HS-CAN2. For additional information about the message center controls, refer to the Owner Literature.

MyKey® Function Message Displays

The IPC provides message center displays for the MyKey® feature. MyKey® displays are controlled through the IPC software based on the MyKey® settings configured through the center stack display and the type of key in use (MyKey® or administrator key). The MyKey® function also uses other messages received by the IPC for other indications such as vehicle speed for speed limiter displays.

Odometer

The IPC receives the odometer count, ignition status and transport mode messages from the GWM over the HS-CAN3. The GWM receives the odometer count, ignition status and transport mode messages from the PCM over the HS-CAN1. The IPC monitors the odometer count input from the GWM and commands the odometer with a digital display in the message center.

Outside Air Temperature

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 sends the ambient air temperature data to the GWM through the HS-CAN1. The GWM sends the ambient air temperature message to the HVAC over the MS-CAN. The HVAC module filters the data and sends the outside air temperature data to the GWM over the MS-CAN. The GWM sends the outside air temperature message to the IPC over the HS-CAN3.

The HVAC module is programmed to update the messaged outside temperature data at different rates depending on several criteria 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 outside air temperature display update strategy requires a starting temperature to update from. This starting temperature is controlled based on the length of time the engine is off and the engine temperature. When the engine has been off for longer than 4 hours, the update strategy begins with the unfiltered ambient air temperature input to the PCM. If the engine has been off for less than 4 hours, and the engine coolant temperature is less than 30° C (86° F), the update strategy begins with the filtered ambient air temperature equal to the unfiltered ambient air temperature. If the engine has been off for less than 4 hours, and the engine coolant temperature is greater than 30° C (86° F), the update strategy begins at the stored previous outside air temperature value.

When the sensed outside temperature rises and the vehicle speed is above 32 km/h (21 mph), the outside air temperature display updates after approximately 90 seconds. As the vehicle speed increases, the outside air temperature display updates at a faster rate that is proportional to the increase in vehicle speed. Once the vehicle speed exceeds 80 km/h (50 mph), the display updates without any delay. If the vehicle speed drops below 32 km/h (21 mph), the update delays reset. When the sensed outside temperature drops, the display updates more quickly following the drop experienced by the Ambient Air Temperature (AAT) sensor.

Selectable Drive Modes

The IPC provides the following selectable drive mode displays to indicate which mode has been selected. For additional information on the selectable drive mode feature, refer to the appropriate 206-09 section.

• Normal
• Conserve
• Excite
• Slippery
• Deep conditions
• Deep sand
• Pure EV (if equipped)
• Preserve EV (if equipped)

The IPC receives the selectable drive mode request and selectable drive mode status messages from the GWM over the HS-CAN3. The GWM receives the selectable drive mode request and selectable drive mode status messages from the ABS module over the HS-CAN2.

Startup/Shutdown Displays

The IPC provides a power on - not ready to start display in the message center when the power button is pressed without pressing the brake. The message center displays a battery gauge along with electric range information. The display will also indicate if the vehicle is currently plugged into an external charging source, charging status, and start and end time of the charging event.

When the vehicle is shut off, the message center displays a trip summary. The trip summary data is cumulative since the last vehicle start and is calculated internally in the IPC. The message center displays charging status, and whether the vehicle is plugged into an external charging source. The charging status is provided along with either charge duration or start or end time for the current charging event.

Message Center Displays - Information On-Demand

The information on-demand displays in the message center are selected by the customer using the RH steering wheel switch.

Electric Efficiency Display (PHEV)

The IPC provides a message center display indicating the average driving distance per kWh of electricity used. The value is calculated when the available electric range is being used, and the gasoline engine is off. A distance per full charge displays the estimated electric vehicle range if the vehicle is plugged into an external charging source and fully charged. The higher the electric efficiency, the higher the distance per full charge.

The IPC receives the range per charge display message from the GWM over the HS-CAN3. The GWM receives the range per charge display message from the PCM over the HS-CAN1.

Electric Vehicle (EV) Coach Display

The Electric Vehicle (EV) coach display provides the driver with vehicle power and power level recovered during regenerative braking. When the driver accelerates or maintains vehicle speed, the display will indicate the vehicle power level and the power level when the engine will turn on. When the driver decelerates, either by releasing the accelerator pedal or pressing the brake pedal, the display will indicate the power being used to slow the vehicle. The display also indicates the amount of energy available that the regenerative braking system can recover. For additional information, refer to the Owner Literature.

The IPC receives the power level fill display, power level threshold display and power regeneration threshold display messages from the GWM over the HS-CAN3. The GWM receives the power level fill display, power level threshold display and power regeneration threshold display messages from the PCM over the HS-CAN1.

Fuel Economy Display (PHEV)

The fuel economy gauge provides the Instantaneous Fuel Economy (IFE) and Average Fuel Economy (AFE) data. The data is displayed as part of the fuel economy information in the on-demand gauge display in the message center. The Average Fuel Economy (AFE) is the calculated fuel economy since the last reset. It is calculated in the IPC and can be reset or cleared by the customer in the message center.

The IPC uses the engine active display, fuel flow volume display, odometer count, ignition key type and vehicle speed messages to calculate the Average Fuel Economy (AFE). The IPC receives the messages from the GWM over the HS-CAN3. The GWM receives the engine active display, fuel flow volume display, odometer count and vehicle speed messages from the PCM over the HS-CAN1. The GWM receives the ignition key type message from the BCM over the HS-CAN1.

When the gas engine is off, the Instantaneous Fuel Economy (IFE) display is replaced with the message "electric driving".

High Voltage Battery Display (PHEV, China)

The high voltage battery display indicates the total percentage of battery charge available associated with electric only driving range. A full fill display indicates the total amount of energy obtained from an external charging source (vehicle plugged in). When the fill display indicates empty, the powertrain system will automatically switch to operating in hybrid mode.

The IPC receives the battery state of charge data message from the GWM over the HS-CAN3. The GWM receives the battery charge data message from the BECM over the HS-CAN1.

This Trip (PHEV)

The This Trip display provides a trip timer, trip average fuel economy, total trip distance traveled and distance traveled on electric power only (engine off). If the gas engine has not turned on during the calculated trip, the average fuel economy is not displayed. This Trip automatically resets with each vehicle start. This Trip is calculated internally in the IPC.

Trip 1 and Trip 2

The Trip 1 and Trip 2 displays provide a trip timer, average fuel economy, total trip distance traveled and distance traveled on electric power only (engine off). The customer can reset the Trip data in the message center display. The Trip displays are calculated internally in the IPC.

TPMS

The IPC provides a message center display showing each tire on a vehicle image to indicate specific tire pressures.

The IPC receives the tire pressure system status and tire pressure placard data messages from the GWM over the HS-CAN3. The GWM receives the tire pressure system status and tire pressure placard data messages from the BCM over the HS-CAN1.

Warning Messages

The message center warning messages alert the operator to possible concerns or malfunctions in the vehicle operating systems. Warning messages are generally associated with other observable outputs of the IPC (gauges, informational indicators and RTT indicators. For example, when the ABS module detects a low brake fluid condition, the ABS module sends the IPC a request through the GWM to illuminate the brake warning indicator and a request to display the LOW BRAKE FLUID message in the message center. This allows the message center to be a more informative supplement to the IPC gauges and indicators.

AWD

The message center provides AWD message center messages to provide shifting instructions and inform the driver of the status of the AWD system. The IPC receives the AWD status display request message from the GWM over the HS-CAN3. The GWM receives the AWD status display request message from the AWD over the HS-CAN1.

Active Park Assist

The message center provides a warning message when a fault is detected in the active park assist system. The IPC receives the active park assist warning message request from the GWM over the HS-CAN3. The GWM receives the active park assist warning message request from the IPMB over the HS-CAN2.

ACC

The message center provides messages explaining the need for driver intervention and system status. The adaptive cruise control messages are supplemental to the cruise control RTT indicator and the adaptive cruise control warning chime. The IPC receives the adaptive cruise control warning request message from the GWM over the HS-CAN3. The GWM receives the adaptive cruise control warning request message from the IPMA over the HS-CAN2.

Adaptive Headlamps

The message center provides the adaptive headlamp fault message to inform the driver of a fault with the adaptive headlamps. The IPC receives the adaptive headlamp fault message from the GWM over the HS-CAN3. The GWM receives the adaptive headlamp fault message from the HCM over the HS-CAN1.

Auto Stop-Start

The message center provides additional instructions for driver intervention or warning messages when a fault in the auto stop/start system is detected. The IPC receives the stop start warning message request from the GWM over the HS-CAN3. The GWM receives the stop start warning message request from the PCM over the HS-CAN1.

BLIS/ CTA

The message center provides messages indicating the reason for the BLIS/ CTA fault. The IPC receives the cross traffic alert left sensor status, cross traffic alert right sensor status, side obstacle sensor status-left and side obstacle sensor status-right messages from the GWM over the HS-CAN3. The GWM receives the cross traffic alert left sensor status, side obstacle sensor status-left, cross traffic alert right sensor status and side obstacle sensor status-right messages from the SODL and SODR, respectively, over the MS-CAN.

Brake Applied - Power Reduced

The message center provides a warning message to inform the driver that power is being reduced because the brake pedal is being pressed while the accelerator pedal is pressed. The IPC receives the brake pedal applied message from the GWM over the HS-CAN3. The GWM receives the brake pedal applied message from the PCM over the HS-CAN1.

Brake System

The IPC provides brake system messages for the following concerns and status:

• Low brake fluid level.
• Electric parking brake status and faults
• ABS concerns that display along with the brake warning indicator operation.

When the electric park brake is selected, the ABS module sends the brake lamp request and park brake (red) warning indicator request to the GWM over the HS-CAN2. The GWM sends the brake lamp request and parking brake (red) warning indicator request to the IPC over the HS-CAN3 to illuminate the brake warning indicator and display the electric parking brake messages.

When a low brake fluid level condition exists, the ABS module sends the brake lamp request message request to the GWM over the HS-CAN1. The GWM sends the message to the IPC over the HS-CAN3 to illuminate the brake warning indicator and turn on the brake fluid level low message in the message center.

When an ABS or parking brake system concern exists, the ABS module sends the parking brake (red) warning indicator request message to the GWM over the HS-CAN2. The GWM sends the parking brake (red) warning indicator request message to the IPC over the HS-CAN3 to illuminate the ABS warning indictor and to turn on the check brake system message center warning display.

Charging System

The message center provides a warning message indicating the status of the charging system. When a fault is present in the charging system, the BCM sends the battery low state of charge message to the GWM over the HS-CAN1. The IPC receives the battery low state of charge message from the GWM over the HS-CAN3.

Door, Hood or Liftgate Ajar

The IPC provides door, hood and liftgate ajar warnings to indicate the status of the doors, liftgate and hood. The IPC receives the driver door ajar, passenger door ajar, left rear door ajar, right rear door ajar status, liftgate ajar status and hood ajar status messages from the GWM over the HS-CAN3. The GWM receives the driver door ajar, passenger door ajar, left rear door ajar, right rear door ajar status, liftgate ajar status and hood ajar status messages from the BCM over the HS-CAN1. The BCM monitors each of the ajar inputs and sends the specific door ajar status message to the IPC to display the ajar warning indicator and corresponding warning message.

Electronic Latch System and Child Locks

As part of an advanced electronic door latching system, the message center provides electronic latching system fault, instructional and status messages to inform the driver of the system status. The message center also provides child lock status messages to inform the driver of the child lock state.

The IPC receives all required messages from the GWM over the HS-CAN3. The GWM receives the door latch control-left front message from the DCME, the door latch control-right front message from the DCMF, the door latch control-left rear message from the DCMG, and the door latch control-right rear message from the DCMH over the MS-CAN.

The GWM receives the lock system message request from the BCM over the HS-CAN1.

EPAS

The message center provides a message to indicate there is an EPAS system concern. When a fault exists in the EPAS, the PSCM sends the EPAS failure message to the GWM over the HS-CAN2.

The IPC receives the EPAS failure message from the GWM over the HS-CAN3.

Engine Oil Life

The instrument cluster provides messages to inform the driver about the engine oil life status, engine oil life reset status and when an engine oil change is required. The duration of the interval between engine oil changes is calculated in the PCM and varies due to driving conditions. The PCM assumes a base mileage of 16,090 km (10,000 mi) or 1 year for normal driving. However, this number is adjusted down for conditions such as high engine temperature, high engine rpm, use of flex fuel and possibly low engine oil level. The PCM calculates and provides the engine oil life percent message to the IPC. The engine oil change minder can be reset at any time by the driver.

The IPC receives the engine oil life message from the GWM over the HS-CAN3. The GWM receives the engine oil life message from the PCM over the HS-CAN1.

The PCM receives the engine oil life data reset message from the GWM over the HS-CAN1. The GWM receives the engine oil life data reset message from the IPC over the HS-CAN3.

Engine Over-Temperature

The message center provides the engine coolant over-temperature warning message to supplement the engine over-temperature RTT indicator and alert the driver the engine is over temperature. The IPC receives the engine overheat indication request and the engine coolant temperature data from the GWM over the HS-CAN3. The GWM receives the engine overheat indication request and the engine over-temperature message from the PCM over the HS-CAN1.

Factory Keycode

The message center can display the original factory keycode when requested. The IPC receives the keycode status message from the GWM over the HS-CAN3. The GWM receives the keycode status message from the BCM over the HS-CAN1. For information on how to retrieve the factory keycode,
Refer to: Handles, Locks, Latches and Entry Systems - System Operation and Component Description (501-14 Handles, Locks, Latches and Entry Systems, Description and Operation).

Factory-Transport Mode

During vehicle build, some modules, such as the IPC and the BCM, are set in factory mode. While in the factory mode the IPC displays FACTORY MODE CONTACT DEALER in the message center. If the vehicle is set in factory mode, the system does not automatically exit the mode and must be manually set to either the transport or normal operation mode.

When the vehicle build is complete, the vehicle is set to transport mode. While in transport mode, the IPC displays TRANSPORT MODE CONTACT DEALER in the message center. Transport mode is used to reduce the drain on the battery during longer periods where the vehicle is not used. Various systems may be altered or are disabled when in the transport mode. The vehicle automatically reverts to normal operation mode after being driven 201 km (125 mi).

The IPC receives the transport mode message from the GWM over the HS-CAN3. The GWM receives the transport mode message from the BCM over the HS-CAN1.

Forward Collision

If a fault is detected with the forward collision system, the message center provides the forward collision warning messages to inform the driver of the system status. The IPC receives the forward collision warning message request from the GWM over the HS-CAN3. The GWM receives the forward collision warning message request from the IPMA over the HS-CAN2.

Front Camera Malfunction

When a fault is present with the front camera the IPMA sends the front camera display status message to the GWM over HS-CAN2. The IPC receives the front camera display status message from the GWM over the HS-CAN3.

Fuel System

The IPC provides fuel system messages for the following concerns and status:

• Check fuel fill inlet message (gas) - warns the driver there is a problem with the fuel fill inlet pipe resulting in a significant evaporative emission leak following vehicle refueling
• Fuel door opening (PHEV) - informs the driver to wait approximately 15 seconds while the fuel system depressurizes
• Fuel door open (PHEV) - informs the driver the fuel system has depressurized and it is safe to refuel
• Refuel system status display (PHEV) - displays when the fuel system fails to depressurize or the fuel filler door fails to open
• Fuel maintenance mode display (PHEV) - displays when the engine needs to run to maintain fuel freshness
• Check fuel door to avoid check engine light (PHEV) - displays as a reminder to close the fuel door

The IPC receives the check fuel fill inlet message request, refuel system status display message and fuel maintenance mode display message from the GWM over the HS-CAN3. The GWM receives the check fuel fill inlet message request, the refuel system status display message and the fuel maintenance mode display message from the PCM over the HS-CAN1.

HDC

The message center provides HDC warnings to inform the driver of the system status and when driver intervention is required. The ABS sends the hill descent control indicator request message to GWM over HS-CAN2. The IPC receives the hill descent control indicator request message from the GWM over the HS-CAN3.

Hill Start Assist

The message center provides hill start assist warnings to inform the driver the system is unavailable. The IPC receives the hill start assist status message from the GWM over the HS-CAN3. The GWM receives the hill start assist status message from the ABS module over the HS-CAN2.

Lane Keeping System

The message center provides a warning message for the lane keeping alert and system fault messages for the lane keeping system. The IPC receives all required messages from the GWM over the HS-CAN3. The GWM receives the lane keeping system hands off display message, the lane keeping system status display and the camera status display message from the IPMA over the HS-CAN2.

Load Shed

The message center provides load shed messages to inform the driver to use less options to conserve battery voltage. The IPC receives the battery low state of charge message from the GWM over the HS-CAN3. The GWM receives the battery low state of charge message from the BCM over the HS-CAN1.

Low Engine Oil Pressure

The message center provides a low engine oil pressure warning message to inform the driver the engine oil pressure is low. The message supplements the IPC RTT warning indicator. The IPC receives the engine oil pressure warning indicator request message from the GWM over the HS-CAN3. The GWM receives the engine oil pressure warning indicator request message from the PCM over the HS-CAN1.

Low Engine Use Mode (PHEV)

The message center provides a message informing the driver the Electric Vehicle (EV) functionality has been turned off and the engine is running in order to maintain engine oil quality, due to low engine operation. The IPC receives the engine on message display message from the GWM over the HS-CAN3. The GWM receives the engine on message display message from the PCM over the HS-CAN1.

Memory Seat

The message center displays messages to inform the driver a selected memory position has been saved or the memory recall is not permitted while the vehicle is in motion. The IPC receives the memory command and memory command drive status messages from the GWM over the HS-CAN3. The GWM receives the memory command and memory command drive status messages from the DSM over the MS-CAN.

MyKey®

The IPC provides a number of MyKey® related warnings and status messages to indicate restrictions imposed on the MyKey® user. These include MyKey® active, park aid, speed limits, and buckle up warnings among others. MyKey® displays are controlled through the IPC software based on the MyKey® settings configured through the center stack display and the type of key in use (MyKey® or administrator key). The MyKey® function also uses other messages received by the IPC for other indications such as vehicle speed for speed limiter displays.

Neutral Tow

The message center provides towing system messages to indicate the status of the neutral tow feature when the neutral tow system is enabled and the vehicle is capable of free-rolling. The IPC receives the neutral tow status message from the GWM over the HS-CAN3. The GWM receives the neutral tow status message from the PCM over the HS-CAN1.

Off Road Mode

The message center provides messages informing the driver the vehicle is entering or exiting off road mode. The IPC receives the AWD status display request from the GWM over the HS-CAN3. The GWM receives the AWD status display request from the AWD module over the HS-CAN2.

Parking Aid System

The IPC provides messages to indicate the status of the parking aid system. The IPC receives the parking aid front status and parking aid rear status messages from the GWM over the HS-CAN3. The GWM receives the parking aid front status and parking aid rear status messages from the IPMB (with 360° camera) or PAM (without 360° camera) over the HS-CAN2.

PATS And Passive Key And Immobilizer System

The message center provides the starting system fault message to indicate there is a concern with the PATS. The message center provides passive key and immobilizer system messages to indicate the key program is successful, key battery is low, key could not be programmed or failed or maximum number of keys have been programmed. The IPC uses the immobilizer message display messaged input from the BCM to display the applicable message center message.

The IPC receives the immobilizer message request and power pack status from the GWM over the HS-CAN3.

The GWM receives the immobilizer message request from the BCM over the HS-CAN1.

The GWM receives the power pack status from the PCM over the HS-CAN1.

Perimeter Alarm

The message center provides the perimeter alarm warning message to indicate the perimeter alarm has been activated and to start the vehicle to stop the alarm. The IPC receives the perimeter alarm chime request message from the GWM over the HS-CAN3. The GWM receives the perimeter alarm chime request message from the BCM over the HS-CAN1.

Power Child Lock-Switch Inhibit And Low Key Fob

The IPC provides a power child lock warning to inform the driver the child lock feature did not function properly. The power child lock feature is activated through the rear window lockout switch on the driver side master window control switch.

The IPC provides a switch inhibit warning to notify the driver that some switches have been purposely inhibited and are inoperative. For security purposes, interior switches are inhibited by the BCM 20 seconds after the vehicle is electronically locked and prevents someone from using a stick (or other object) through an open window and activating the switch.

The IPC provides a low key fob battery warning to alert the driver the key fob battery needs to be replaced. The low key fob battery warning is not displayed in RUN or START modes if the power child lock warning is active to prevent the BCM from cycling between the two warnings, causing the chime associated with the power child lock warning to repeatedly sound every 4 seconds.

The IPC receives the lock system message request from the GWM over the HS-CAN3. The GWM receives the lock system message request from the BCM over the HS-CAN1.

Powertrain Cooling

The message center provides a warning message to inform the driver that vehicle performance is reduced to allow the engine to cool. This feature is part of the smart cooling function in the PCM and provides powertrain cooling protection under high ambient temperature conditions.

The IPC receives the powertrain cooling message request from the GWM over the HS-CAN3. The GWM receives the powertrain cooling message request from the PCM over the HS-CAN1.

Rear Seatbelt Monitor

The message center provides a message to indicate the status of the second and third row seatbelts and if they are buckled. The IPC receives the second row driver seatbelt buckle status, second row middle seatbelt buckle status, second row passenger seatbelt buckle status, third row driver seatbelt buckle status and third row passenger seatbelt buckle status messages from the GWM over the HS-CAN3. The GWM receives the applicable status messages from the RCM over the HS-CAN2.

Remote Start

The message center provides remote start messages to inform the driver the vehicle is in the remote start active state and how to change the state to a drivable state. The remote start message display is active as soon as the vehicle is remote started (the engine is running, but the ignition status is off). Once the driver places the ignition in the RUN state, the IPC carries out its startup sequence.

The IPC receives the remote start status message from the GWM over the HS-CAN3. The GWM receives the remote start status message from the BCM over the HS-CAN1.

Side Wind Compensation

The message center provides a message to inform the driver the stability-traction control indication is due to a side wind stabilization event. The side wind compensation feature uses the ABS to compensate for strong side winds that can push the vehicle out of its intended lane, similar to the trailer sway feature. The IPC receives the stability-traction control message request from the GWM over the HS-CAN3. The GWM receives the stability-traction control message request from the ABS module over the HS-CAN2.

Stability-Traction Control

The message center provides a stability-traction control system message to indicate the stability-traction control system has a fault and requires service. When a fault condition exists in the stability-traction control system, the ABS module sets a DTC and sends the stability-traction control chime request to the GWM over the HS-CAN2. The GWM sends the stability-traction control chime request to the IPC over the HS-CAN3.

Starting System

The message center provides starting system messages to inform the driver of the starting system status and when driver intervention is required in order to start the engine. The IPC receives the starting system message request and the stop-start message request messages from the GWM over the HS-CAN3. The GWM receives the starting system message request and the stop-start message request messages from the PCM over the HS-CAN1.

TPMS

The IPC provides message center displays to indicate the TPMS sensor training status or a malfunction in the TPMS. The IPC receives the tire pressure system status message from the GWM over the HS-CAN3. The GWM receives the tire pressure system status message from the BCM over the HS-CAN1.

Trailer Lighting

The message center provides warning messages to indicate the status of the trailer lamp connections and trailer lamps. The IPC receives the trailer lamp connected, trailer lamp out and trailer turn indicator request messages from the GWM over the HS-CAN3. The GWM receives the trailer lamp connected, trailer lamp out and trailer turn indicator request messages from the TRM over the MS-CAN.

Trailer Sway

The message center provides the trailer sway warning message to inform that a trailer sway has been deteced and to reduce speed to help get the trailer under control. The IPC receives the trailer sway event in progress message display request from the GWM over the HS-CAN3. The GWM receives the trailer sway event in progress message display request from the ABS module over the HS-CAN2.

Transmission Not In Park

The message center provides a transmission not in park message to inform the driver the vehicle is not in P.

The IPC receives all required messages from the GWM over the HS-CAN3.

The GWM receives the transmission gear message request and transmission gear status messages from the PCM over the HS-CAN1.

The GWM receives the driver door ajar status message and ignition status message from the BCM over the HS-CAN1.

The GWM receives the GSM gear message request from the GSM over the HS-CAN2.

Vehicle On

The message center provides the vehicle on warning message to inform the driver they are exiting the vehicle when the engine is running. The IPC uses multiple inputs to determine the vehicle is stopped and the driver is preparing to exit the vehicle. The messages required to control the vehicle on warning message are as follows:

• Driver door ajar status
• Power pack status
• Transmission gear display

The IPC receives all required messages from the GWM over the HS-CAN3.

The GWM receives the driver door ajar status from the BCM over the HS-CAN1.

The GWM receives the power pack status and transmission gear display messages from the PCM over the HS-CAN1.

Component Description

Brake Fluid Level Switch

The brake fluid level switch is mounted in the master cylinder reservoir and is hardwired to the ABS module through a single signal and ground circuits. The ABS module provides a reference voltage to the brake fluid level switch. When the brake fluid level is low the switch closes, pulling the reference voltage low. When the brake fluid level is high, the switch opens, sending the reference voltage high on the signal circuit to the ABS module.

Engine Oil Pressure Sensor

The engine oil pressure sensor is hardwired to the PCM through voltage reference (VREF), signal and return circuits. The PCM provides the sensor voltage supply on the VREF circuit and monitors the change in voltage through the signal and return circuits as the engine oil pressure changes.

Fuel Level Sender (Float and Card)

The fuel level sender is mounted to the fuel pump and sender unit. The fuel level sender is a dual sweep potentiometer style resistor connected to a float mechanism. Each sweep has multiple fingers that reduces intermittent loss of data. As the fuel level changes, the float rises or falls with the fuel level moving the sweep arm across the resistor wires. This movement either increases or decreases the resistance through the unit. The fuel level sensor resistance ranges from 180 ohms ± 4 ohms to 10 ohms ± 2 ohms. When the fuel level is low, the fuel level sensor resistance is high. When the fuel level is high, the fuel level sensor resistance is low.

The fuel pump and sender unit is hardwired to the IPC through separate signal and return circuits. The fuel level return circuits are grounded internally in the IPC. The IPC provides a reference voltage on the fuel level signal circuit. As the fuel level changes, the change in resistance raises or lowers the fuel level signal voltage depending on the resistance of the fuel level sender. The IPC converts the fuel level signals and sends them to the PCM through the GWM.

Low Washer Fluid Level Switch

The low washer fluid switch is hardwired to the IPC through a single signal wire and is grounded to a body ground through a separate circuit. The IPC provides a reference voltage to the low washer fluid level switch. When the washer fluid level is low, the float drops closing the switch and pulling the reference voltage low. When the washer fluid level is high, the float lifts opening the circuit to the IPC and sending the reference voltage high.

Steering Wheel Switch - Message Center

The IPC and message center functions are controlled with the upper RH steering wheel switch, through the IPC message center menu. The RH steering wheel switch connects to the SIMA ( LH steering wheel switch connector). The SIMA is connected to the SCCM through private CAN circuits. The SCCM receives the switch signals from the SIMA over the private CAN, then sends the switch signals to the IPC through the GWM over the HS-CAN3 to operate the message center.