Scan Tool Data List

Typical Tech 1 Data Values
If after completing the on-board diagnostic system check and finding the on-board diagnostics functioning properly and no diagnostic trouble codes displayed, a comparison of "Typical Tech 1 Values," for the appropriate engine, may be used for comparison. The "Typical Tech 1 Values" are average display values recorded from normally operating vehicles and are intended to represent a what a normally functioning system would display.

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 are used for diagnosis. If a scan reads other parameters, the values are not recommended by General Motors for use in diagnosis. For more description on the values and use of the Tech 1 to diagnose ECM inputs, refer to the applicable diagnosis. If all values are within the range illustrated, refer to "Symptoms". Testing and Inspection