General Information
Before Using Scan Data ValuesUse the Typical Scan Data Values tables listed under this heading only after the following is determined:
^ On-Board Diagnostic System Check is completed.
^ No Diagnostic Trouble Codes (DTCs).
^ On-board diagnostics are functioning properly. Scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Typical Scan Tool Data Values represent values that would be seen on a normally running engine.
Parameters Used In Diagnosis
Only the parameters listed under this heading are referenced in this database for use in diagnosis. For further information on using the scan tool to diagnose the PCM and related sensors, refer to the applicable reference heading listed in this section. If all values are within the typical range listed in the tables, refer to Symptoms for diagnosis.
Scan Tool Parameter Locations
The column in the Scan Data Tables labeled "Data List," indicates where a parameter can be located on the Scan Tool. The following is a description of each term listed:
^ Eng 1 = Engine 1 Data Values
^ Eng 2 = Engine 2 Data Values
^ Eng 3 = Engine 3 Data Values
^ FT 1 = Fuel Trim 1 Data Values
^ FT 2 = Fuel Trim 2 Data Values
^ Misfire = Misfire Data Values
Scan Value Test Conditions
The values specified for Cold Idle and Hot Idle are based on approximate outside temperatures of 16°C (60°F) at 900 feet above sea level. The values specified for Cold Key On and 55 Cruise are based on approximate outside temperatures of 27°C (81°F) at 900 feet above sea level. Due to the wide range of readings possible for some parameters, the values can range outside the values specified under certain conditions.
Notice: A scan tool that displays faulty data should not be used. The scan tool problem should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.