Gage Information

Gage Information provides selected information to the driver. The Gage Information displays are accessed by pressing the GAGE INFO button. This mode has five different elements: Oil Pressure, Coolant Temperature, Battery Volts, Oil Life Index, and Tire Pressure Status.

Gage information is not stored by the IPC when the ignition is turned off. Gage information is determined from values received from class 2 serial data. The PC is required to process all irrelevant gage data at all times regardless of the current display mode of the DIC. The DIC will display (---) where the data values are normally placed if the IPC determines that the source of gage information for that element has failed.

The following paragraphs provide detailed information for each of the five Gage Information modes:

Oil Pressure
Oil Pressure displays, in either English or metric units, the oil pressure as measured by the oil pressure sensor in the engine. The PCM processes the information and sends it to the PC as a class 2 message. The IPC also determines if the oil pressure is in the normal range through the Low Engine Oil Pressure indicator class 2 message. If the PCM detects the oil pressure sensor has failed, the PCM will send fail soft values which are also actual pressure values.

Coolant Temperature
Coolant Temperature displays, in either English or metric units, the coolant temperature as measured by the coolant temperature sensor in the engine. The PCM processes the information and sends a class 2 message to the cluster. The IPC determines if the coolant temperature is in the normal range through the Engine Coolant Fluid Temperature class 2 message. Under normal operation the PCM will send actual temperature values detected by the coolant sensor. If the PCM detects the coolant sensor has failed, the PCM will send estimated coolant temperature values. The DIC will display the word NORMAL preceding the temperature value, unless the IPC determines a condition which indicates a temperature problem. If the IPC determines a temperature problem the word normal will be replaced by HOT.

Battery Volts
The DIC displays the electrical system voltage as measured by the SBM. The SBM processes the information and sends a class 2 message to the IPC. If the battery voltage from the SBM is below 10.5 volts, the DIC will display the word LOW preceding the voltage value. If the battery voltage from the SBM is above 16 volts, the DIC will display the word HIGH preceding the voltage value. If the battery voltage from the SBM is equal to or between 10.5 volts and 16 volts, the DIC will display the word NORMAL preceding the voltage value.

Oil Life Index
The DIC displays Oil Life Index as calculated by the PCM. Oil Life Index describes the estimated percentage oil life remaining. When the Oil Life Index drops to 10 percent, a Change Oil message is displayed. The PCM processes the information and sends a class 2 message to the IPC. The DIC will display NORMAL if the Change Oil Soon message from the PCM is not active. Once the Change Oil Soon message is received from the PCM, the DIC will indicate CHANGE OIL until the Oil Life Index is reset. If the RESET button is pressed and held for more than 5 seconds while this message is displayed, the Oil Life Index is reset to 100 percent. The status of the Oil Life Index is stored in KAM when the ignition is turned off.

Tire Pressure Status
This message indicates when a low tire pressure condition has been detected by the EBCM. The EBCM processes the information and sends a class 2 message to the PC. The DIC message displayed does not indicate which tire has low pressure or the actual value. Once tire inflation is corrected the IPC will send a class 2 message to the EBCM to reset the value. The EBCM verifies a reset has been received by sending a new message to the IPC. The driver should see the tire status showing TIRE PRESSURE NORMAL on the DIC.