Engine Scan Data Values

The Tech 1 scan data listed in these tables may be used for comparison after completing the "On-Board Diagnostic (OBD) System Check" and finding the on-board diagnostics functioning properly with no Diagnostic Trouble Codes [DTC(s)] displayed. The "Typical Tech 1 Data Values" are an average of display values recorded from normally operating vehicles and are intended to represent what a normally functioning system would display. The values you get may vary due to low battery charge or other reasons, but they should be very close.

NOTE: A scan tool that displays faulty data should not be used, and the problem should be reported to the manufacturer. the use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are used for diagnosis. If a scan tool reads other parameters, the values are not recommended by OEM for use in diagnosis. For more description on the values and use of the Tech 1 tool to diagnosis PCM inputs, refer to the applicable components. If all values are within the range illustrated, refer to Diagnosis By Symptom / Intermittents. Testing and Inspection

Typical Tech 1 Engine Data Values: