Odometer: Description and Operation

ODOMETERS
Each instrument cluster (IPC) is equipped with a season odometer and 2 trip odometers. The IPC uses the odometer rolling count message from the PCM. The rolling count value is determined by counting the speed pulses from the vehicle speed signal (VSS). The IPC uses the rolling count data from the PCM and a software program to determine vehicle mileage. The odometers can be displayed in miles or kilometers. The units displayed is switched between english and metric by pressing the E/M button on the DIC (if equipped). When the E/M button is pressed to show the odometer in metric, km and the number will be displayed. When the odometer is in english, only the number will be displayed. During a bulb check all segments on the odometer including A, B and the word TRIP illuminate for 5 seconds.

SEASON ODOMETER
The season odometer displays the total accumulated miles or kilometers of the vehicle. This value is permanently stored in the IPC. If an odometer malfunction occurs or if the IPC must be replaced, an authorized Delco service center must be contacted to program proper vehicle specifics (including mileage) for the IPC. The season odometer is capable of displaying 999,999 kilometers or 999,999 miles depending on units selected. Leading zeros are not displayed. The display will not roll-over to 000,000 if the maximum displayed miles or kilometers are reached. If the display limit is exceeded, the maximum value (999,999) is displayed. If the mileage is above 621,503 miles and metric units are selected the odometer shall display 999,999 km.

TRIP ODOMETER
The trip odometer displays the accumulated miles or kilometers to the tenths of a mile or kilometer since the last reset. This value is stored in the IPC. The IPC has 2 trip odometers which can be selected by pressing the trip reset button. Pressing this button puts you in the trip mode A. Pressing this button again will put you in trip mode B. Pressing this button again will put you in Oil Life Left Index. Pressing this button again will put you in the season (total miles) mode assuming you started from the season mode. The displayed trip odometer is reset on the IPC by pressing and holding the trip reset button for 1.5 seconds. You have to be in the specific trip mode (A or B) in order to reset that specific trip odometer. Both trip odometers accumulate miles or kilometers even when they are not displayed. If the trip reset button is pressed and held for 3 seconds while in a trip mode (A or B), the display will reset to the number of miles (km) travelled since the start of the current ignition cycle.