Entering PCM Code Snapshot
WARNING: This page is about a different car, the 1992 Cadillac Fleetwood and 1992 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
With ".7.0" displayed on FDC (to cause ".7.0" to be displayed on FDC, see INTRODUCTION TO DIAGNOSTIC TESTING), depress and release LO button on ECCP. This will switch display from ".7.0" to "E.9.0". With "E.9.0" displayed, depress ECON and WARMER buttons on ECCP. Display will now enter PCM code snapshot mode and displayed codes will be prefixed by "L".