Code 62, Cruise Vacuum Solenoid
Cruise switch within turn signal lever receives ignition voltage from a 15-amp fuse on circuit No. 639. Cruise switches are inputs to cruise control portion of PCM. Cruise servo, vent and vacuum solenoids are output lines and are controlled by high side drivers in PCM. With ignition on, PCM looks at these output lines and will set a code depending upon actual status of these lines compared with commanded status. In this manner, PCM can detect opens or shorts to ground or voltage.