LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1995 >> DeVille Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.9L >> Self-Diagnostic System >> Service Mode Operation >> Selecting System Level
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Selecting System Level

Following diagnostic trouble code display, first available system will be displayed (i.e., PCM?). When selecting a system to test, any of following actions may be taken to control display:

  1. Pressing HI (fan up) button on CCP will select displayed system for testing (i.e., PCM DATA?, PCM INPUTS?, PCM OUTPUTS?, etc.). See Figure .
  2. Pressing LO (fan down) button on CCP will display next available system selection (i.e., IPC?, ACP?, SIR? or TCS?). This allows display to be cycled through all system choices. This list of systems can be repeated following end of system list.
  3. Pressing OFF button on CCP will stop system selection process and return display to beginning of PCM diagnostic trouble code sequence.
scientia non olet · About LEMON Manuals