For 1990-2009 cars

The Scan Tool Data Definitions list contains a brief description of all of the engine 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.

FC Relay 1 Command: This parameter displays the control module commanded state of the cooling fan.
FC Relay 2 Command: This parameter displays the control module commanded state of the cooling fan.
Fans Low Speed: This parameter displays the control module commanded state of the cooling fan.
Fans High Speed: This parameter displays the control module commanded state of the cooling fan.