Instrument Panel Cluster (IPC) - System Operation and Component Description

out of PARK (P) or NEUTRAL (N), the fuel gauge strategy reverts to the anti-slosh mode. The key ON fueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the ignition in the RUN mode.

Recovery Mode

Recovery mode is incorporated into the IPC strategy to recover from a missing fuel level input after a refueling event. Missing fuel level inputs result from intermittent opens in the fuel sensor or its circuits. Recovery mode (empty [E] to full [F] approximately 17 minutes) is initiated when the following 2 conditions are met:

The IPC is in the anti-slosh (default) mode. The actual fuel level in the tank is 5% different from what is being displayed by the fuel gauge.

Speedometer

The PCM receives the wheel speed data from the GWM over the HS-CAN1. The GWM receives the wheel speed data from the ABS module over the HS-CAN2. The PCM uses tire size stored in the vehicle configuration file along with wheel speed inputs to generate a vehicle speed signal.

The IPC receives the vehicle speed message from the GWM over the HS-CAN3. The GWM receives the vehicle speed message from the PCM over the HS-CAN1.

The IPC provides a tolerance that allows the speed indication to display between 3% below and 7% above the actual vehicle speed. This means that with an actual vehicle speed of 97 km/h (60 mph), the speedometer can indicate between 94-103 km/h (58-64 mph). Incorrect tire size or tire size configuration could potentially affect the speedometer accuracy.

Tachometer

The IPC receives the engine rpm data message from the GWM over the HS-CAN3. The GWM receives the engine rpm data message from the PCM over the HS-CAN1.

Temperature

The IPC uses 2 messages to control the temperature gauge. The first is the engine coolant temperature data, which provides the current engine temperature input to the PCM. The second message is the engine overheat indication request, which is sent by the PCM to the IPC when an overheating condition exists. When the IPC receives the engine overheat indication request message, the IPC sends the temperature gauge to full hot and turns on the over-temperature warning indicator.

The IPC receives both temperature gauge inputs from the GWM over the HS-CAN3. The GWM receives the engine coolant temperature data and the engine overheat indication request messages from the PCM over the HS-CAN1.

Virtual Gauges

Accelerometer

The accelerometer is a graphical gauge that is selected through the message center. The IPC receives the vehicle lateral acceleration and vehicle longitudinal acceleration messages from the GWM over the HS-CAN3. The GWM receives the vehicle lateral acceleration and vehicle longitudinal acceleration messages from the ABS module over the HS-CAN2.

Air Fuel Ratio

The air fuel ratio gauge is a graphical gauge with an additional numeric display ranging between 10 and 20 that is selected through the message center. For the virtual gauge display navigation, see the message center menu options in the Owner's Literature. The IPC receives the air fuel ratio display message from the GWM over the HS-CAN3. The GWM receives the air fuel ratio display message from the PCM over the HS-CAN1.

Axle Oil Temperature (If Equipped-SVT Only)

The axle oil temperature gauge is a graphical gauge with an additional numeric display ranging between 50-175° C (100-350° F) and is selected through the message center. For the virtual gauge display navigation, see the message center menu options in the Owner's Literature. The IPC receives the axle oil temperature data from the GWM over the HS-CAN3. The GWM receives the axle oil temperature data from the PCM over the HS-CAN1.