Temp. Gage Position - Range 0 - 255 Counts

This data indicates what message is being sent from the Body Function Controller (BFC) to the Instrument Cluster to control Temperature Gage Pointer position. The Powertrain Control Module (PCM) reads the Engine Coolant Temperature (ECT) sensor, filters it, and sends engine coolant temperature to the Body Function Controller (BFC) via the Class 2 serial data line. The Powertrain Control Module (PCM) also monitors the ECT Sensor. The Powertrain Control Module (PCM) will set a DTC if the ECT Sensor is faulty. The Body Function Controller (BFC) converts the Powertrain Control Module (PCM) Class 2 serial data ECT Sensor message into Serial Peripheral Interface (SPI) count units and then sends the Class 2 serial data message to the Instrument Cluster in an Serial Peripheral Interface (SPI) message. The Instrument Cluster then drives the Temperature Gage Pointer. The temperature gage Serial Peripheral Interface (SPI) count value to temperature gage (pointer) position ratio is as follows: