Powertrain Control Module Inhibit

Powertrain Control Module (PCM) will inhibit cruise control if one or more of following has occurred:

• When park, reverse, neutral, or first gear is indicated.
• When certain Diagnostic Trouble Codes (DTC) are stored. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
• When an over/undercharged battery condition exists.
• With low engine RPM.
• With high engine RPM e.g. fuel cut off.