Mercury Villager 2000-2002

How To Use PID Data


PID is an acronym for Parameter Identification Data. It is used to identify PCM related items on both OEM and aftermarket Scan Tools. The PID Data or data stream items available for display include:

PCM analog & digital input signals (ACT, ECT, IAT, MAP, TP)
PCM analog & digital output signals (EVR, FUELPW1, MIL)
PCM calculated values (VACUUM, LOAD, MISF, SPARK)
PCM system status information (OBD II I/M Readiness Status)

To view PID Data on a Scan Tool, connect the Scan Tool to the vehicle connector; then identify the vehicle by following the setup instructions, and select Data Stream or Parameter from the menu.

If a Scan Tool does not power up or read PID Data, verify that the power, ground and tool cable connections are all okay. To test if the tool is working properly, try it on another vehicle.

Information contained within the PID Data Charts can be used to:

Validate a repair procedure
Check the operation of a component before or after a repair
Check the operation of a component or system by viewing "live" data from the vehicle computer data stream

This section of the Domestic Car Handbook contains Parameter ID (PID) tables for Ford, Lincoln and Mercury vehicles from 1990-2005. It can be used to assist in the repair of both Code & No Code problems.

This Section of the Handbook can be used to look up PID Data so that you can compare the "known good" values to the actual values you see on the Scan Tool display. To locate the PID Data, find the model, correct engine size (with VIN Code) and finally the year of the vehicle.

For example, to look up the PID Data for a 1999 Taurus 3.0L VIN U, go to Contents Page 2 and find the text string shown below: Then find the following PCM PID information.

In this example, the Fuel Tank Pressure Sensor should read near 2.6v with the cap removed. The actual PID value from the vehicle can be used to check the sensor calibration by comparing it against the known good PID value in pin voltage tab