Check Speed Control Servo/Actuator Cable
Turn ignition off. Disconnect speed control servo/actuator cable from servo/actuator. Check speed control servo/actuator cable for sticking or binding. If speed control servo/actuator cable is okay, replace speed control servo/actuator and perform SELF-DIAGNOSTIC TEST. If speed control servo/actuator cable is not okay, replace speed control servo/actuator cable and perform SELF-DIAGNOSTIC TEST.