Certain instrument panel cluster (IPC) features are tested when the ignition is turned ON in order to verify that the features are working properly. The following indicators illuminate briefly at key up unless otherwise noted:

Refer to Indicator/Warning Message Description and Operation .

The engine control module (ECM) sends the coolant temperature to the body control module (BCM) via class 2. The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the BCM. The IPC receives a class 2 message from the BCM indicating the engine coolant temperature. The engine coolant temperature (ECT) gage, if equipped, defaults to 75°C (160°F) or below if:

Refer to Cooling System Description and Operation in Engine Cooling for more information.

The engine control module (ECM) sends fuel level percent to the instrument panel cluster (IPC) via class 2. The IPC displays the fuel level as determined by the ECM. The IPC receives a class 2 message from the ECM indicating the fuel level percent. The fuel gage defaults to E (empty) if:

When the fuel level is less than 4 percent, the low fuel indicator illuminates. For more information about the fuel system, refer to the following:

The electronic brake control module (EBCM) calculates the lateral acceleration during vehicle turns, as part of the vehicle stability enhancement system (VSES). The EBCM sends a class 2 message to the instrument panel cluster (IPC) indicating the lateral acceleration, which is measured in a g or the acceleration due to gravity. The Lateral Acceleration display measures for 0.00 g up to 1.2g. When (B) is pressed and held while the Lateral Acceleration display is being shown, the peak hold values on both tick marks and number will reset to zero.

Refer to ABS Description and Operation in Antilock Brake System for more information regarding the VSES.

The instrument panel cluster (IPC) displays the vehicle mileage and trip mileage as determined by the engine control module (ECM). The IPC calculates the vehicle mileage based on the speed pulses from the vehicle speed sensor (VSS) signal and calculating the mileage for odometer displays. The odometer will display Error if an internal IPC memory failure is detected and DTC B1009 is set.

The instrument panel cluster (IPC) displays the vehicle speed based on the information from the engine control module (ECM). The ECM sends a 4,000 pulse per mile signal to the cluster discretely. The IPC calculates the vehicle speed using the time difference between consecutive pulses. The speedometer will default to zero if the time duration since the last speed pulse is greater than or equal to one second.

The instrument panel cluster (IPC) receives a discrete input from the engine control module (ECM) indicating vehicle speed. Each engine revolution is represents 2  input pulses to the ECM. The instantaneous engine speed is calculated by the ECM using the time difference between the 2 input pulses. The tachometer will default to 0 RPM if: