Principles of Operation

PRINCIPLES OF OPERATION

The message center electronic functions use both hardwired and controller area network (CAN) circuits to transmit and receive information. It is very important to understand:
- where the input (command) originates.
- all the information (messages) necessary in order for a feature to operate.
- which module(s) receive(s) the input or command message.
- does the module which received the input (message) control the output of the feature, or does it output a message over the CAN circuits to another module?
- which module controls the output of the feature.

Display Information
The display modes are:
- information
- setup
- system check
- warning
- temporary alert
- display off

Using the message center, various information can be selected and reset by pressing the following buttons:
- SET (for setup and reset function)
- INFO

The select display and the reset display time-out and default to the information display mode. The temporary alert display interrupts the current display to show the status of an event that has just happened. The warning display interrupts the current display until cleared or reset by the driver.

Information Displays
The information displays are as follows:
- compass (if equipped)
- average fuel economy (if equipped)
- distance to empty
- instantaneous fuel economy (if equipped)
- fuel available (if equipped)
- units (US/metric)
- language
- display off

Setup Displays
The setup displays are timed modes and default back to the information display function. The setup display modes are:
- language
- units (US/metric)
- system check

System Check
The system check display is a sub-routine of the setup menu. These sub-routines are timed modes that terminate after a finite interval, then default back to the information display function. The system check display modes are:
- oil life XXX%
- charging system
- door ajar
- brake fluid level
- check headlamps
- check front turn lamps
- fuel level
- miles to empty
- emission system
- 4x4 OK

Warning Messages
The warning messages can interrupt the display until cleared or reset by the driver. The warning messages are either single cycle, non-resettable, or repetitive warning messages.

The single cycle warning messages display once whenever the ignition switch is turned to the ON position or a fault occurs in a system, and can be cleared by pressing the RESET button. The single cycle warning messages are:
- liftgate ajar
- service emission system
- low brake fluid
- service brake system
- check left headlamp
- check right headlamp
- check left turn lamps
- check right turn lamps
- check left high beam
- check right high beam
- check fuel cap
- change oil soon
- change oil now
- low fuel
- service 4x4
- turn signal on
- regen disabled (Escape Hybrid)
- speed control on (Escape Hybrid)
- low tire pressure
- tire monitor fault
- tire sensor fault
- train tires
- tires trained
- tires not trained

The repetitive warning message (park brake ON) displays whenever the ignition switch is turned to the ON position or a fault occurs in a system. The repetitive warning message appears again after a 10-minute interval until the condition is corrected.

The non-resettable warning messages display whenever the ignition switch is turned to the ON position and a fault occurs in a system. The fault must be corrected to clear the non-resettable warning messages.

The non-resettable warning messages are:
- high engine temperature
- driver door ajar
- passenger door ajar
- driver rear door ajar
- passenger rear door ajar
- stop safely now (Escape Hybrid)

Temporary Alert Messages
The temporary alert display interrupts the current display to show the status of an event that has just happened. The temporary alert messages are:
- 4x4 locked temporarily
- 4x4 disabled temporarily
- 4x4 auto restored