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Home >> Cadillac >> 1991 >> DeVille Touring >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Testing >> Pcm Code & Instant Snapshot >> Entering PCM Code Snapshot

Entering PCM Code Snapshot

With ".7.0" displayed on the FDC (to cause ".7.0" to be displayed on the FDC, see INTRODUCTION TO DIAGNOSTIC TESTING  under DIAGNOSTIC TESTING), depress and release the 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 the displayed codes will be prefixed by the letter "L".