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:

Refer to Indicator/Warning Message Description and Operation .

The ECM sends coolant temperature as determined by the coolant temperature sensor to the IPC via class 2. The IPC displays the engine coolant temperature with the gage. The engine coolant temperature gage defaults to cold (0°) or below if:

The PCM sends fuel level percent to the IPC via class 2. The IPC displays the fuel level as determined by the ECM. The fuel gage defaults to E (empty) if:

When the fuel level is less than 10%, the LOW FUEL message illuminates.

The message center is located in the instrument panel cluster at the bottom of the speedometer. It is a two-line display that gives the odometer, trip odometer, warning and information messages.

With the key in ACC, the odometer and trip odometer are shown. With the key in RUN, the entire message center LCD is commanded on for a few seconds to check the display segments.

Information or warning messages show in the top line of the message center. Information messages have a higher priority than the odometer. If there are several messages, each message will be shown for a few seconds before the next message is displayed. The list of messages repeats. Each message can be cleared for that key cycle by momentarily pressing the trip reset button when the message is displayed. Several messages will also cause a chime to sound as a driver alert.

When the ignition key is OFF, the odometer and trip odometer can be displayed by pressing the trip reset stem once. The message center will show both odometer readings for a few seconds, then go off.

The odometer shows how far the vehicle has been driven, in either miles (domestic) or kilometers (export). The odometer is shown in the top line of the message display when any of the following occur:

Odometer readings are displayed in the IPC based on a class 2 message from the BCM. The ECM calculates the distance traveled from the VSS input. The BCM receives a class 2 message from the ECM and stores the current mileage.

The IPC stores the last valid odometer reading from the BCM in non-volatile memory. When a new valid odometer reading is received from the BCM, the IPC will update the display and store the new reading.

The IPC also receives class 2 messages from the BCM regarding VIN and Vehicle content information. Valid information is stored in non-volatile memory at the first key-up with a new IPC. If the VIN or option content do not match the stored information, the odometer will display ERROR.

From the Odometer display, momentarily pressing the trip reset button toggles to the oil life reset mode in the IPC. Pressing and holding the button, while OIL LIFE is displayed will reset the oil life monitor in the ECM with a class 2 message. The ECM responds with a class 2 message to the IPC.

The IPC displays the vehicle speed based on the information from the ECM. The ECM calculates the vehicle speed based on the class 2 message indicating the wheel reference speed from the EBCM if:

The speedometer defaults to 0 km/h (0 mph) if the IPC detects a loss of class 2 communications with both the ECM.

The IPC displays the engine speed as determined by the ECM via a class 2 message. The tachometer will default to 0 RPM if:

Trip odometer readings are calculated by the IPC based on odometer reading received from a class 2 message from the BCM. The trip odometer is shown in the bottom line of the Message Display whenever the odometer is displayed. To reset the trip odometer, press and hold the trip reset stem for about two seconds, until the trip odometer shows zero.