Cruise Control

On models with cruise control, the system is operated by the PCM. PCM receives inputs from VSS, servo diaphragm position sensor, cruise control switch and brake release switch. Based on these inputs, PCM controls vacuum valves at servo. PCM prevents system engagement at speeds of less than 25 MPH. PCM is not serviceable; if defective, it must be replaced. System faults are stored as codes in PCM memory.