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Home >> Mercury >> 2005 >> Mariner 2WD V6-3.0L VIN 1 >> Repair and Diagnosis >> Instrument Panel, Gauges and Warning Indicators >> Driver/Vehicle Information Display >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Principles of Operation

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
- 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
- average fuel economy
- distance to empty
- instantaneous fuel economy
- fuel available
- 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 brake lamps
- check front turn lamps
- check parking 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
- liftgate glass 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 brake lamps
- check parking lamps
- washer fluid low
- check fuel cap
- change oil soon
- change oil now
- low fuel
- service 4x4
- turn signal on

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

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

PRINCIPLES OF OPERATION - ESCAPE HYBRID

The message center electronic functions use both hardwired and CAN circuits to 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.
- which module controls the output of the feature.

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

Various message center information can be selected and reset by pressing the following buttons:
- SET
- 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 and disappears after a few seconds. The warning display interrupts the current display until cleared or reset by the driver.

Message Center General Displays
The message center display is a 2 row by 12 character LCD display. The display is controlled by a 2 button switch module that includes INFO and SET buttons outside of the instrument cluster. The information displayed in the message center display falls into 4 main categories:
- jump start mode
- info
- warnings
- temporary alerts

Message Center Information Displays
The INFORMATION DISPLAY mode is entered by pressing the INFO button. Subsequent presses of the INFO button scroll through the menu features of the information display.

System Check
When the SET FOR SYSTEM CHECK information is currently displayed, pressing the SET button leads the instrument cluster to initiate the system check function. The system check function provides the driver with the current status of certain vehicle functions. The status of each function is displayed sequentially on the message center. The driver has the ability to scroll through the system check displays by repeatedly pressing the SET button, or the display automatically scrolls at 2 seconds time out per display. The system check function can be terminated at any time by pressing any message center switch other than the SET button.

Warning Indicators and Messages


Warning Indicators And Messages:






The warning messages have precedence over all other messages. Every warning message is displayed. The messages can be single cycle, non-resettable, or repetitive. The instrument cluster indicators that are illuminated when a fault occurs and the message that follows are shown in the table.

Warning Messages







The instrument cluster messages that are displayed when a fault occurs are shown in the table.

The warning messages continue to cycle in order until the vehicle condition causing the warning is corrected, until the ignition switch is turned to the OFF position, or until the message center is reset while the warning is displayed. A warning is removed from the display when the message center is reset unless the warning is non-resettable. A repeated warning message is removed from the display when the message center is reset and displays again after 10 minutes if the warning condition is not corrected. The single cycle warning message is removed from the display when the message center is reset and is not displayed again until the next ignition cycle. Multiple messages are cycled through in a fixed order with a display of 4 seconds for each warning. No other display modes are allowed while a warning message is displayed.
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