The coolant temperature sensor is located in the engine water jacket and is a resistive type sender. The sensor connected to the Powertrain Control Module (PCM) via discrete inputs. The filtered coolant temperature data is sent from the PCM to the IPC, via the class 2 serial data line. The IPC uses the temperature data received from the PCM and a software program in order to determine the proper coolant temperature gauge pointer position. When the IPC receives the coolant temperature via class 2, the IPC compares the data to a calibratable look up table for the engine configuration. The coolant temperature is transmitted over the Class 2 serial data link on a change of 1.5°C (34.7°F) or more.

The fuel gage displays the amount of fuel in the fuel tank according to a signal the IPC receives from the PCM. A resistive type fuel sender is located in the fuel tank. The fuel sender is connected to the PCM via discrete inputs. The filtered fuel data is sent from the PCM to the IPC, via the class 2 serial data line. The IPC uses the fuel data received from the PCM and a software program to determine the proper fuel gauge pointer position. The IPC updates the display within 300 milliseconds of receiving the data from the PCM, if the IPC can not communicate with the PCM, the fuel gauge pointer indicates empty, and dashes are displayed in all DIC fuel information.

The IPC is equipped with an electronic PRNDL display. The display conveys the current selected gear (P,R,N,D,3,2,1) by placing an amber filled box behind the selected gear. The IPC PRNDL information is received from PCM over the class 2 serial data line.

The tachometer displays engine RPM (speed) anytime the power mode is RUN. The engine RPM is calculated by a discrete signal sent to the IPC from the PCM. The engine speed signal is active low, with a pull-up resistor located in the IPC and connected to switched battery voltage. The signal is a square wave with a 25 to 75 percent duty cycle. Each engine revolution is represented by two input pulses. Engine speed is calculated using the time difference between the two consecutive pulses. Accuracy of the final calculations are +/- 25 RPM.

The Speedometer displays vehicle speed. A vehicle speed sensor (VSS) connected to the Powertrain Control Module (PCM) via discrete inputs provides a signal source to the IPC. The VSS discrete signal is pulled up to ignition 1 (IGN 1) in the IPC. The IPC uses the VSS data received from the PCM and a software program to determine the proper speedometer gauge pointer position. This vehicle speed pulse train is expressed as 4000 pulses per mile. Any calculated speed above 140 mph or 220 km/h is ignored and the last valid speed is displayed.