Grand Prix V6-3.8L SC VIN 1 (1997)
units from English to metric by pressing the "E/M" button on the face of the Trip Calculator.
IMPORTANT: The "E/M STATE" output may be used by other displays in the vehicle to set their display units. the trip calculator must remember the
state of the switch from the last ignition cycle.
The Trip Calculator shall perform error detection where possible (no serial data stream for 10 seconds or an open circuited fuel level sender). If the Trip
Calculator is unable to calculate a value due to any missing data, it shall display a flashing "0" when the mode is selected. The Trip Calculator will
update the display with the correct information for each mode selected within a given time frame. The recommended display update rates, allowable
range for each parameter, and reset values are indicated below.
Performance Shift Indicator
The Performance Shift Indicator shall illuminate per information sent along the Serial Data Line circuit 800. It will indicate to the driver whether or not
the Performance Shift Mode has been selected at the Performance Shift Switch. The Performance Shift Indicator will only be used on 3.8 Liter
Supercharged Engines.
Range
Range is calculated as the product of the Average Fuel Economy (AFE) multiplied by the amount of fuel remaining in the tank (AFE x Fuel remaining).
When a range of less than 40 miles is calculating the low fuel range mode is entered, except during the first ten miles following the AFE reset. During
these first ten miles, the low fuel range mode ("LO FUEL" message) shall not be entered and the range of values shall be 0-999.
During the low fuel range mode the numeric display will spell "LO FUEL" and extinguish the "MI" or "km" units. After the low fuel range mode is
first entered, the message shall be flashed at a 2 Hz rate for 60 seconds then displayed continuously. If the range mode was not selected by the driver
upon entering the low fuel range mode, then the Trip Calculator shall override the mode being displayed and select the range mode. The driver may
however override the low fuel range mode by selecting another mode. If the Ignition is cycled the Trip Calculator shall re-enter it as if it calculated it for
the first time.
The fuel sender input is a voltage vs. gallons (fuel level) curve generated by a 0 to 90 ohm variable sender located in the fuel tank and pulled up to
Ignition at the Instrument Cluster. The RANGE algorithm must filter the fuel tank sender input over at least a 2 minute average. Hysteresis shall be
applied where applicable. The reset button has no effect while in range mode. Range is reset by an AFE reset.
