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 BCM via CAN serial data. The IPC displays the engine coolant temperature with the gage when the BCM sends a class 2 message to the IPC indicating coolant temperature percentage. The engine coolant temperature gage defaults to cold (0°) or below if:

The ECM sends fuel level percent to the BCM via CAN serial data. The IPC displays the fuel level as determined by the BCM. The fuel gage defaults to E (empty) if:

When the fuel level is less than a pre-determined value, the Low Fuel indicator message illuminates.

The odometer shows how far the vehicle has been driven, in either miles (domestic) or kilometers (export). The odometer is shown on 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 CAN serial data 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.

The IPC displays the vehicle speed based on the information from the BCM. The ECM calculates the vehicle speed based on the CAN serial data message indicating the wheel reference speed from the EBCM. The ECM sends a CAN serial data message to the BCM indicating the vehicle speed. The BCM sends a class 2 message to the IPC indicating the vehicle speed.

The speedometer defaults to 0 km/h (0 mph) when any of the following occur:

The IPC displays the engine speed as determined by the BCM via a class 2 message. The ECM determines the engine speed and sends a CAN serial data message to the BCM indicating the engine speed. The tachometer will default to 0 RPM if:

Trip odometer readings are calculated by the IPC based on the odometer reading received through a class 2 message from the BCM. The trip odometer is shown when selected with the odometer trip reset stem. To reset the trip odometer, press and hold the trip reset stem for about two seconds, until the trip odometer shows zero.