The Scan Tool Data Definitions list contains a brief description of all of the cooling system related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists. In some cases the parameter may appear more than once, or in more than one data list in order to group certain related parameters together.

ECT Sensor: This parameter displays the temperature of the engine coolant based on input to the control module from the engine coolant temperature (ECT) sensor.

Fans Low Speed: This parameter displays the control module commanded state of the cooling fan low relay.

Fans High Speed: This parameter displays the control module commanded state of the cooling fan relays that are required to enable high speed fan operation. When this parameter is indicating ON, all three cooling fan relays should be energized.

FC Low Speed Command: This parameter displays the control module commanded state of the cooling fan low relay.

FC High Speed Command : This parameter displays the control module commanded state of the cooling fan relays that are required to enable high speed fan operation. When this parameter is indicating ON, all three cooling fan relays should be energized.