Engine

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.

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 - Intermittent Malfunctions .

Typical Scan Data Values (1 of 2) - PCM:

1 of 2

Typical Scan Data Values (2 of 2) - PCM:

2 of 2

TECH 1 TOOL DATA
Test Under Following Conditions:

^ Engine at Operating Temperature
^ Engine Idling in "Closed Loop"
^ Closed Throttle
^ Park/Neutral
^ All Accessories "OFF"

(1) If not equipped with purge solenoid scan tool will display 0% or 99%.