Performing Self-Test

WARNING: This page is about a different car, the 1998 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

To perform self-test, turn ignition off. Ensure test equipment is properly attached. Program scan tool using the following steps:

Select VEHICLE & ENGINE SELECTION menu.
Select NEW VEHICLE, YEAR & MODEL.
Select DIAGNOSTIC DATA LINK.
Select PCM - POWERTRAIN CONTROL MODULE.
Select DIAGNOSTIC TEST MODE.
Select RETRIEVE/CLEAR CONTINUOUS DTCs.
Turn ignition on.
Follow operating instructions from scan tool menu.
Record DTCs and perform appropriate circuit test. See DIAGNOSTIC TROUBLE CODE (DTC) REFERENCE CHART .

After test is completed, cycle ignition switch before performing other self-tests or driving vehicle.