For 1990-2009 cars

The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in alphabetical order. A parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the Engine Scan Tool Data List only after the following conditions are determined:

• | The Diagnostic System Check - Engine Controls is completed.

• | There are no DTCs.

• | The on-board diagnostics are functioning correctly.

Scan tool values from an engine that is operating correctly may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents the values that would be seen on a normal operating engine.

Important: Do not use a scan tool that displays faulty data. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool may result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service information for use in diagnosis.

The column labeled Data List indicates where a parameter is located on the scan tool. Review the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:

All: The Parameter is in all data lists indicated below.
Eng: Engine Data
EGR: EGR Data
EVAP: EVAP Data
FT: Fuel Trim Data
HO2S: O2S/HO2S Data
MF: Misfire Data
TAC: Throttle Actuated Control Data
CC: Cruise Control Data
CH: Cooling/HVAC Data
IPC: IPC Data
FF: Freeze Frame Data
FR: Failure Records Data

Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values
--- | --- | --- | ---
Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories Off
FC Relay 1 Command | CH | On/Off | Off
FC Relay 2 Command | CH | On/Off | Off
Fans Low Speed Command | CH | On/Off | Off
Fans High Speed Command | CH | On/Off | Off