The cruise control system starts working at speeds over 40 km/h. The system is enabled by a switch on the cruise control control panel. The on state is indicated by a lit lamp on the switch.
Pressing the switch turns the system on/off intermittently. The switch actuator is pneumatic, consists of a diaphragm, rod and cable. The vacuum in the diaphragm is controlled by a solenoid valve. If the cruise control does not work satisfactorily, check the adjustment of the clutch and brake pedals, the operation of the switch, the condition of the vacuum hoses, the drive cable, etc. correct speed sensor. If the car loses speed, then check the tightness of the pneumatic drive parts and adjust the drive cable.