Message Center - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

  FCDIM (Except 6.5" Touchscreen Display) and FDIM (6.5" Touchscreen Display)

ABS Displays

The message center provides displays indicating an ABS malfunction. When an ABS malfunction is present, the IPC illuminates the ABS warning indicator and sends the ABS warning indicator request to the FDIM through the APIM or to the FCDIM to display the ABS malfunction warning and message center warning indicator.

The IPC receives the ABS warning indicator request from the ABS module over the HS-CAN and sends it to the FDIM or FCDIM over the Infotainment Controller Area Network (I-CAN).

Alarm System Displays

The message center provides displays indicating a PATS key read failure or PATS failure. The IPC controls the PATS indication when the vehicle is not equipped with passive entry with push button start. For vehicles equipped with passive entry with push button start, the IPC receives the PATS indication message from the RFA module.

Brake System Displays

The message center provides brake system displays to indicate:

• low brake fluid level.
• the parking brake is applied.
• an ABS concern.

When a low brake fluid level condition exists, the IPC illuminates the brake warning indicator and sends the brake fluid level low message to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN) to display the brake fluid level low warning and message center indicator in the message center.

When the parking brake is applied, the IPC illuminates the brake warning indicator and sends the parking brake status message to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN) to display the parking brake applied warning and message center indicator in the message center.

When an ABS concern exists, the ABS module sends the brake warning request message to the IPC over the HS-CAN . The IPC illuminates the brake warning indicator and sends the brake warning indicator request message to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN) to display the brake system malfunction warning and message center warning indicator.

For additional information on when each of the brake system warning indicators illuminate, see ABS/Brake/Stability-Traction Control System Indication.
Refer to: Instrument Panel Cluster (IPC) - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

Compass Display

The message center provides a compass display indicating the vehicle's direction. The IPC receives the compass direction data from the GPSM over the MS-CAN . The IPC sends the compass direction data to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Door Ajar Indication Displays (Except Touchscreen Display)

The message center provides a message center display indicating the status of the doors, liftgate and hood. The BCM monitors each of the ajar inputs and sends a door status message to the IPC over the MS-CAN to display the specific ajar status. The IPC sends the door status message for the specific door, hood or liftgate ajar indication to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Electronic Power Assist Steering (EPAS) System Displays

The message center provides message displays indicating an EPAS system concern. The IPC receives the EPAS display message from the PSCM over the HS-CAN and sends it to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Engine Displays

The message center provides message center displays indicating an engine malfunction, an engine oil change is needed and the engine oil pressure is low. The IPC receives the engine malfunction indication message, the engine oil change now indicator message and the engine oil pressure indicator message from the PCM over the HS-CAN and sends them to the IPC FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Exterior Lighting Bulb Failure Displays

The message center provides message center displays indicating the status of exterior lighting bulbs. The BCM monitors the status of the exterior lighting bulbs and sends the lamp outage indication request message to the IPC over the MS-CAN . The IPC sends the lamp outage request message to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Hill Start Assist System Displays

The message center provides a message center display indicating the status of the hill start assist system. The IPC receives the hill start assist status message from the ABS module over the HS-CAN and sends it to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Key Battery Display

The message center provides a message indicating to the driver that the key fob battery voltage is low. The IPC receives the key battery message request from the BCM over the MS-CAN and sends it to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Message Center Indicators

The FDIM or FCDIM displays message center indicators along with warning messages. Many of the message center indicators use the same or similar graphical representations that are used in the IPC as informational or warning indicators. For example: the door ajar message center warning indicator is represented by the same door ajar symbol used in the IPC . The message center indicators are displayed along with warning messages and may also be accompanied by a warning chime.

MyKey® Displays

The message center provides MyKey® displays to indicate the MyKey® controls, the status of the MyKey® system and the MyKey® programming. The IPC sends the MyKey® message request to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or FCDIM over the Infotainment Controller Area Network (I-CAN).

The MyKey® feature allows the customer to program a restricted driving mode that is tied to one or more keys known as a MyKey® key. The following features are provided by the message center when a MyKey® key is being used:

• At the beginning of vehicle start up, as part of the welcome strategy, the message center greets the MyKey® driver with the MyKey® active drive safely message displayed in the message center. If the MyKey® speed limiter feature is turned on, the message center also displays the MyKey® administrator selected top speed setting message. The MyKey® top speed selections are 100, 110, 120, 130, 140 or 160 km/h (65, 70, 75, 80, 85 or 100 mph) or to the administrator desired setpoint.
• The IPC provides a periodic Belt-Minder® warning chime until the driver and passenger safety belts are buckled. When the Belt-Minder® is issued, the ACM is muted and the message center displays a buckle up to unmute audio message.
• If the MyKey® speed limiter feature is turned on and the vehicle speed reaches the selected top speed (100, 110, 120, 130, 140 or 160 km/h [65, 70, 75, 80, 85 or 100 mph]), the message center displays the vehicle at top speed setting message along with a chime.
• If the speed warning is selected at one of the preset values (70, 90, 100, 110, 120, 130 or 140 km/h [45, 55, 65, 70, 75, 80 or 85 mph]) and the vehicle reaches the preset speed, the message center displays the check speed drive safely message along with a chime.
• At approximately 1/8 tank (8.25 liters [2.2 gal]) or less, the IPC illuminates the low fuel message center indicator and the message center displays the low fuel level message along with a chime.
• If the traction control always on feature is turned on and the MyKey® driver attempts to disable the traction control, the message center displays the traction control-stability control on message.
• MyKey® miles driven by the MyKey® user can be found in the information display.
• The number of MyKey® programmed and administrator keys can be found in the MyKey® menu.
• The parking aid warning menu is disabled in the message center to force this feature always on.

When an administrator key is in use, the FCDIM (except 6.5" touchscreen display) or the FDIM (6.5" touchscreen display) provides:

• a menu in the message center guiding the user to create a MyKey®. When the maximum MyKey® limit is reached, the MyKey® creation menu is no longer available.
• a menu in the message center with options for setting 4 optional MyKey® features:
  • MyKey® speed limiter
  • MyKey® pre-selected speed warning
  • MyKey® radio volume limiter
  • traction control always on or user selectable
• a menu to clear all MyKey® programmed keys at once.
• MyKey® mileage driven by the MyKey® user in system check function of the message center.
• the number of MyKey® programmed keys and administrator keys in the system check function of the message center.

For additional information on the MyKey® features, refer to the Owner's Literature.

Odometer

The IPC receives the odometer count message from the PCM over the HS-CAN . The IPC monitors the odometer count input from the PCM and commands the odometer with a digital display in the integrated LCD , located in the center of the IPC .

One-Touch Integrated Start Displays

The message center provides message displays indicating the status of the one-touch integrated start system. The IPC receives the one-touch integrated start status message from the PCM over the HS-CAN and send it to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Outside Air Temperature Display

The Ambient Air Temperature (AAT) sensor is hardwired to the IPC through separate input and return circuits. The IPC 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 IPC filters the ambient air temperature input and sends the outside air temperature data message to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN). The IPC is programmed to update the displayed temperature 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 IPC uses the last displayed temperature reading, engine coolant temperature and length of time the engine is off to determine how the display is updated. The IPC stores the last temperature reading at key off and then compares the value against the current temperature reading. When the current temperature reading is below the stored temperature reading, the engine has been off for 2.5 hours or the engine coolant temperature is below 45°C (32°F), the IPC displays the current outside air temperature as measured by the Ambient Air Temperature (AAT) sensor.

If the IPC fails any of the above criteria, the display is updated according to the following table:

Passive Entry With Push Button Start Displays

The message center provides message center displays indicating the status of the vehicle's passive entry with push button start system status. The IPC receives the passive key message request message from the RFA over the MS-CAN and sends it to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

PRNDL Display

The IPC receives the transmission gearshift lever position message from the TCM over the HS-CAN . The IPC uses the factory mode and transport mode status, controlled internally, to reduce the battery drain during build and extended periods of time when the vehicle is not in use. The IPC also uses a park position detect switch (part of the selector lever) hardwired input to signal the IPC the shift lever is fully seated in the PARK (P) position. The IPC compares the park position detect switch input with the transmission gear display message sent from the TCM .

Stability-Traction Control System Displays

The message center provides a stability-traction control system message indicating the traction control is disabled. When fault conditions exist such as wheel speed sensor failure, control valve failures, communication failures or low battery voltage in the ABS , the ABS module sends a brake warning request message to the IPC over the HS-CAN to illuminate the ABS warning indictor. The IPC sends the stability-traction control indicator request to the FDIM through the APIM or FCDIM over the Infotainment Controller Area Network (I-CAN) to display the stability-traction control message in the message center.

SRS Indication Displays

The message center provides a display indicating a SRS failure. The IPC receives the airbag malfunction message from the RCM over the HS-CAN and sends it to the FDIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Transmission Displays

The message center provides message center displays indicating transmission malfunctions, transmission range selector status and required driver operations (shift to park). The IPC receives the transmission warning indicator request and gearshift lever message request messages from the TCM over the HS-CAN . The IPC sends the transmission warning indicator request and gearshift lever message request messages to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

TPMS Displays

The message center provides messages indicating TPMS malfunction, tire pressure sensor faults, low tire pressures and tire training. The IPC receives the TPMS message request messages from the BCM over the MS-CAN and sends them to the FDIM through the APIM over the Infotainment Controller Area Network (I-CAN) or to the FCDIM over the Infotainment Controller Area Network (I-CAN).

Component Description

Ambient Air Temperature Sensor

The Ambient Air Temperature (AAT) sensor changes the resistance of the sensor based on the surrounding air temperature. The IPC 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.

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