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Home >> Lincoln >> 2021 >> Nautilus Base, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrumentation, Message Center And Warning Chimes (1 Of 2) >> Description And Operation >> Message Center - System Operation and Component Description >> System Operation >> RTT Indicators

RTT Indicators

Auto High Beam 

The message center provides the auto high beam RTT to inform the driver the auto high beam function is turned on and the high beam status may automatically change. The IPC receives the auto high beam indication request from the GWM over the HS-CAN3. The GWM receives the high beam indication request from the IPMA over the HS-CAN2.

Auto Hold 

The message center provides the auto hold RTT to indicate to the driver the state of the auto hold feature. The auto hold feature holds a vehicle stationary once the vehicle has come to a stop using the brakes, allowing the driver the convenience of removing his or her foot from the brake pedal. The IPC receives the auto hold mode indicator request message from the GWM over the HS-CAN3. The GWM receives the auto hold mode indicator request message from the ABS module over the HS-CAN2.

Auto Stop/Start 

The auto stop/start indicator informs the driver of the following states:

The IPC receives the stop/start standby request from the GWM over the HS-CAN3. The GWM receives the auto stop/start standby request from the PCM over the HS-CAN1.

Blind Spot Monitoring System (BLIS®) Off 

The message center provides a RTT indicator to inform the driver that the BLIS is turned off. The IPC receives the cross traffic alert left status, cross traffic alert right status, side obstacle detect status-left and side obstacle detect status-right messages from the GWM over the HS-CAN3. The GWM receives the cross traffic alert left status, cross traffic alert right status, side obstacle detect status-left and side obstacle detect status-right messages from the SODL and SODR over the MS-CAN.

Charging System 

The message center provides a charging system RTT indicator along with message displays 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 display message center warning messages and the charging system RTT indicator.

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.

Cruise Control 

The IPC uses the following messaged inputs to control the cruise control RTT indicator:

The IPC receives the cruise control messages from the GWM over the HS-CAN3. The GWM receives the cruise control messages from the PCM over the HS-CAN1.

Door, Hood Or Liftgate Ajar 

The message center provides a door ajar RTT along with message displays to indicate the status of the doors, hood and liftgate. The BCM monitors each of the ajar inputs (driver, passenger, left rear, right rear, hood and liftgate) and sends a door ajar status (driver door ajar status, passenger door ajar status, left rear door ajar status, right rear door ajar status, hood ajar status or liftgate ajar status) message to the GWM over the HS-CAN1. The IPC receives the driver door ajar status, passenger door ajar status, left rear door ajar status, right rear door ajar status, hood ajar status or liftgate ajar status messages from the GWM over the HS-CAN3 to display the specific ajar RTT and corresponding warning message.

Engine Over-Temperature 

The message center provides a message center warning indicator to 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.

Lane Centering Assist 

The IPC provides the lane centering assist RTT indicator to inform the driver the lane centering assist system has been turned on. The RTT indicator illuminates green when the system is on, amber to indicate a concern and is gray when the system is not available. Lane centering assist can only be enabled when the adaptive cruise control system is activated.

Lane Keeping System Off 

The IPC provides the lane keeping system off RTT to indicate the lane keeping system has been turned off or is disabled due to a fault condition. The IPC receives the lane keeping system status display message from the GWM over the HS-CAN3. The GWM receives the lane keeping system status display message from the IPMA over the HS-CAN2.

Low Engine Oil Pressure 

The IPC uses the engine oil pressure warning indicator status request and engine rpm data to control the low engine oil pressure indicator. The engine oil pressure switch is hardwired to the PCM. The PCM provides the engine oil pressure warning indicator status request and the engine rpm data to the GWM over the HS-CAN1. The GWM provides the engine oil pressure warning indicator status request and engine rpm data to the IPC over the HS-CAN3. The IPC requires engine rpm above 400 rpm before the message center displays the low engine oil pressure RTT indicator.

Low Fuel 

To supplement the fuel gauge indication, the IPC provides the low fuel message center warning indicator. When the fuel level reaches approximately 120 km (75 miles) for MyKey® users and 80 km (50), 40 km (25), 20 km (12) and 0 km (0 miles) for administrator key users, the IPC turns on the low fuel message center warning indicator.

Low Washer Fluid Level 

The low washer fluid level switch is hardwired to the IPC through a single signal circuit and is grounded through a separate ground circuit. The IPC provides a reference voltage to the washer fluid level switch. When the washer fluid is low, the washer fluid level switch closes to ground, pulling the reference voltage low. When the IPC detects the washer fluid input pulled low and illuminates the low washer fluid level RTT indicator.

Powertrain Malfunction (Wrench) 

The message center provides a powertrain malfunction (wrench) RTT indicator to indicate transmission, Electronic Throttle Control (ETC), AWD and BCM concerns.

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

The GWM receives the body service required message from the BCM over the HS-CAN1.

The GWM receives the AWD service required message from the AWD module over the HS-CAN2.

The GWM receives the engine service required and transmission service required messages from the PCM over the HS-CAN1.

PRNDL And SelectShift® 

The SelectShift® display indicates to the driver which gear is currently selected when the transmission is in the SelectShift® mode. When the transmission is in SelectShift® mode, the gear number is displayed in the SelectShift® display area.

For additional information related to the SelectShift® features, refer to the Owner's Literature.

The IPC uses the following messages to control the PRNDL/progressive range select and SelectShift® indication.

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

The GWM receives the transmission gear position, transmission shift mode display and vehicle speed messages from the PCM over the HS-CAN1 and the ignition status, transport mode and battery shed level request messages from the BCM over the HS-CAN1.

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