Information Display

Information Display

The information display is an Liquid Crystal display (LCD) located on the right hand side at the bottom of the instrument cluster. The LCD has a viewable area of 43 mm X 20 mm with a pixel size of 0.54 mm X 0.54 mm. When active, the information display is illuminated as follows:
^ Pressing of the Trip button will cause the odometer to illuminate and the odometer and trip distance only will be displayed for a period of 20 seconds
^ Ignition on will cause the odometer to illuminate with the full functions displayed

When the ignition is switched on and the lights are off, the information display will illuminate at full, normal brightness, controlled by the ambient light sensor. If the lights are switched on, the intensity of illumination is reduced to a level determined by the PWM dimmer control located on the lighting control switch.

The data shown in the information display is provided to the instrument cluster from other subsystem modules in the form of CAN bus messages. The odometer and trip meter information is derived from the ABS module, the transmission information is supplied from the transmission control module for automatic transmission vehicles or from the transfer box control module for manual transmission.

Odometer
The odometer displays the total distance which the vehicle has travelled. This is calculated by a microprocessor in the instrument cluster using wheel speed messages from the ABS module.

The odometer display can show 6 characters and distances up to 999,999 miles or kilometers. When the ignition is switched off, the odometer reading can be displayed by pressing the trip rest button. The reading will illuminate for a short time before extinguishing.

The total distance travelled is recorded in the instrument cluster Electronically Erasable Programmable Read Only Memory (EEPROM) and the Random Access Memory (RAM). This ensures that the total distance is not lost if the battery is disconnected. The distance is read and stored every 2 kilometers or miles travelled.

Trip Meter
The trip meter displays the total distance which the vehicle has travelled since the last trip meter reset. The trip meter display can show four characters, with a decimal point separating the fourth character which displays 1/10th mile or kilometer. The trip meter can display up to 999.9 miles or kilometers. When this figure is exceeded, the trip display starts again from 000.0 miles or kilometers.

The trip meter can be reset by pressing the trip reset button on the instrument cluster for more than one second. The trip data is stored in the instrument cluster RAM but not in the EEPROM, therefore, if the battery is disconnected, the trip data will be lost and the display will show 000.0 when the battery is reconnected.

Gear Position Indicator

Automatic Transmission
The gear position indicator shows the current selector lever position for the automatic transmission. During normal operation the display will show 'P' for Park, 'R' for reverse, 'N' for Neutral and 'D' for Drive.

When the transmission is operated in 'CommandShift[TM]' mode, the display shows the currently selected manual gear; 1, 2, 3, 4, 5 or 6.

The gear position indicator can also display automatic transmission fault information. The following letters are displayed to relay the fault type to the driver:
^ F' - Transmission Control Module (TCM) has a fault and is using the default limp home mode
^ 'H' - TCM has a fault, the default limp home mode is active and the transmission has reached an overheat temperature of more than 137 degrees C (278 degrees F)
^ 'E' - TCM has disabled CAN bus transmission because of a CAN bus failure or because of a transmission overheat temperature of more than 140 degrees C (284 degrees F).

PRND and Sport Display
The PRND display is only active on vehicles with automatic transmission. The instrument cluster receives CAN bus messages from the TCM for the current selector lever position. This information is used by the instrument cluster to display the current selector lever position.

If the transmission selector lever is moved to the SPORT position, the term 'Sport' is displayed in the LCD. If the selector lever is subsequently moved forward or backwards the transmission operates in 'CommandShift"' mode, the 'Sport' display goes off and the gear position indicator displays the current selected manual gear.

Service Interval Indicator (SII)
The service interval indicator is displayed in the information display. This provides information to the driver warning of an impending service requirement.

The service interval is displayed for 3 seconds when the ignition is switched on providing the service interval threshold has been reached. The service interval is reset by the dealer using T4 or a manual reset procedure and, once set, counts down the mileage and time in days to the next service.

The service interval varies depending on market and vehicle engine fitment. In some Eastern European countries, South American countries, Middle East and African countries and some Asia Pacific countries the SII is disabled.

Two levels of service warning are provided; remaining distance and periodic inspection.

Remaining Distance
The remaining distance is calculated by the instrument cluster by using the current odometer value and the last service reset odometer value. The instrument cluster uses these two values to calculate the distance remaining to the next service. The remaining distance value is used to display the oil service requirement.

The mileage is displayed to the nearest 50 Km or 25 miles depending on the market configuration of the vehicle. If the service interval passes zero without being reset, the instrument pack will continue counting down and the remaining distance display will show a negative (-) value.

The trigger point for displaying the remaining distance is 600 miles (1000 km) or 30 days or less depending on the market configuration of the vehicle and is contained within the Car Configuration File (CCF).

Driver Alert
When an ignition on signal is received by the instrument cluster, the cluster software performs a check to establish if any or both of the driver service alert thresholds have been reached. If a driver alert threshold has been enabled, the applicable service information will be displayed in the information display for 5 seconds. After the 5 second display has elapsed, the information display shows the normal odometer and trip information.

Reset Procedure
There are two ways of resetting the service interval indicator. T4 can be connected to the vehicle and diagnostic routine performed or a manual reset procedure can performed using the trip rest button on the instrument cluster.

Manual Reset Procedure
^ Press and hold the trip reset button.
^ Turn the ignition switch on to the ignition position II.
^ If the SII function is set in the CCF the information display will show 'SERVICE'. If the SII function is not set in the CFF the information display will show the normal odometer and trip information.
^ The software will check if remaining distance service is enabled. If the trip reset button is not released after 10 seconds, the display will show the next service type and distance/days to next service and the instrument cluster will exit the manual reset procedure.
^ If the trip reset button is not released after 10 seconds, the display will show the next service type and distance/days to next service and the instrument cluster will exit the manual reset procedure.
^ If the oil service value reset is not required, press the trip reset button within 10 seconds of releasing it in step 3 and hold for less than 5 seconds and proceed to step 10. This will by-pass the oil service reset procedure.
^ If the oil service value is to be reset, press the trip reset button within 10 seconds of releasing it and hold for more than 5 seconds. The information display will show 'RESET' for 5 seconds and then reset the oil service value. If reset is not possible, the information display will show 'CANNOT RESET' for 5 seconds.
^ If reset is not possible, the information display will show 'CANNOT RESET' for 5 seconds.
^ The information display will show 'INSPECT'
^ If the trip reset button is released within 10 seconds of entering the reset mode, the information display will show 'OIL'. If the trip reset button is not released after 10 seconds, the display will show the next service type and distance/days to next service and the instrument cluster will exit the manual reset procedure.
^ If the trip reset button is not released after 10 seconds, the display will show the next service type and distance/days to next service and the instrument cluster will exit the manual reset procedure.
^ If the periodic inspection value reset is not required, press the trip reset button within 10 seconds of releasing it in step 8 and hold for less than 5 seconds and proceed to step 12. This will by-pass the periodic inspection reset procedure.
^ If the periodic inspection value is to be reset, press the trip reset button within 10 seconds of releasing it and hold for more than 5 seconds. The information display will show 'RESET' for 5 seconds and then reset the periodic inspection value. If reset is not possible, the information display will show 'CANNOT RESET' for 5 seconds.
^ If reset is not possible, the information display will show 'CANNOT RESET' for 5 seconds.
^ The information display will show 'DATE'.
^ If the trip reset button is released within 10 seconds of entering the reset mode, the information display will show 'END'. If the trip reset button is not released after 10 seconds, the display will show the next service type and distance/days to next service and the instrument cluster will exit the manual reset procedure.
^ If the trip reset button is not released after 10 seconds, the display will show the next service type and distance/days to next service and the instrument cluster will exit the manual reset procedure.