Engine Coolant Temperature

Coolant temperature data is calculated within the PCM. The coolant temp warning indicator is controlled through the class II serial data line by the PCM. The instrument cluster will illuminate the coolant temp warning indicator when the PCM has determined that the engine coolant temperature has reached a value of approximately 124°C (255°F). Refer to Powertrain Control Module Description in Computers and Control Systems for more information. Computers and Control Systems