Temperature Gauge

The temperature gauge is an analog gauge on the base and optional mid-level IPC  . The temperature gauge is a virtual gauge on the optional high-level IPC  . The IPC  uses 3 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 is the heater core temperature (PHEV  ). The IPC  uses the maximum value received for both the engine coolant temperature and the heater core temperature as the value for displaying the engine temperature on the gauge. The third 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 all the temperature gauge inputs from the from the GWM  over the High Speed Controller Area Network 3 (HS3-CAN). The GWM  receives the engine coolant temperature data and the engine overheat indication request messages from the PCM  over the High Speed Controller Area Network 1 (HS1-CAN).