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Home >> Cadillac >> 1991 >> Allante 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Self-Diagnostics >> How To Operate Diagnostics >> PCM "SNAPSHOT" Test

PCM "SNAPSHOT" Test

The PCM snapshot feature is included to assist in diagnosis of intermittent problems. The PCM snapshot selection will store one set of all the PCM data parameter values and output status indications at the time that the snapshot is requested. To use the snapshot, enter diagnostics and allow the CCDIC to idle at "PCM Snapshot".

When the intermittent condition occurs, or when the parameters are to be recorded, press HI and hold until the message "PCM Snapshot Taken" appears. The PCM Snapshot Taken message indicates that the data is now stored for review.