323000858 - 5580A CRUISE CONTROL SYSTEM
Cruise Control
OPERATION
Systems for the control of petrol engines with motorised throttle and diesel engines with electronic control of injection time (including versions with MTA gearbox) offer Cruise Control as a function, i.e. a system that automatically maintains a cruising speed set by the driver.The Cruise Control system control is built into the steering column switch unit which also controls the direction indicators and the front/rear windscreen wiper.The location of the Cruise Control system control is illustrated in the diagram.
The third lever for the steering column switch unit incorporates the Cruise Control system controls, namely:
- the ring nut switch for activating/deactivating the system;
- the lever with the vehicle speed increase/decrease memorizing function;
- the Resume button that calls up a saved speed.
| Pin | Description |
|---|---|
| 1 | CRUISE ON |
| 2 | Ignition-controlled supply (INT from F51 junction unit under dashboard) Cruise control lever |
| 3 | Cruise button (RESUME) |
| 4 | Left/right direction indicators analogue signal to Body Computer |
| 5 | Main beam / flasher command signal to Body Computer |
| 6 | Side lights / dipped headlights analogue signal to Body Computer |
| 7 | Not connected |
| 8 | Screen washer pump analogue signal |
| 9 | Not connected |
| 10 | Cruise control lever (UP) |
| 11 | Cruise control lever (DOWN) |
| 12 | Not connected |
| 13 | Analogue sinal from screen wiper lever (OFF, intermittent / AUTO, 1st speed, 2nd speed, panic) to Body Computer |
| 14 | Horn relay coil control signal to Engine Compartment Junction Unit |
| 15 | Signal from Trip Computer functions control button to Instrument Panel |
| 16 | Stalk unit earth |
| 17 | Earth for horn relay coil operation |
| 18 | Not connected |
Memorizing the speed selected
To activate the operation of the Cruise Control:
- 1 - operate the two-way wheel switch to the ON position;
- 2- let the vehicle reach the desired speed; it should be remembered that the Cruise Control can only be activated for speeds above 40 km/h. It is advisable to engage it in fourth gear or higher where the road conditions allow the speed set to be maintained safely.
- 3 - push the steering column switch unit lever upwards to increase the speed; the lever returns automatically (unstable).
- 4 - release the accelerator pedal and let the system work directly;
- 5 - the warning light in the instrument panel should come on constantly with the signal coming from the engine management control unit, via the CAN, indicating the Cruise Control operating status. The warning light going out indicates that the system is deactivated.
Variation in the speed memorized
If you wish to alter the vehicle speed memorized it is necessary to:(A) Speed increase:
- push the lever upwards: this produces an acceleration ramp at a constant, programmable gradient;
- when the lever is released (automatic return), the system maintains and memorizes the new speed reached by the vehicle.
(B) Speed decrease:
- push the lever downwards: having achieved the reduction in the vehicle speed in relation to the speed set previously using the Cruise Control, release the lever and the system will maintain the new vehicle speed.
Resume button function
This function makes it possible, by pressing the button, to return the vehicle to the last speed value memorised if the Cruise Control has been switched off in certain circumstances (for example, by operating the brake).Deactivation of the cruise control
(A) The Cruise Control is deactivated by the user by:
- operating the ring nut switch to the OFF position;
- switching the engine off;
- operating the brake pedal (in this case, the last speed achieved is stored and can be recalled by pressing the Resume button).
- having vehicle speed below the minimum permitted (about 40 km/h) or above the maximum permitted;
(B) The Cruise Control is automatically deactivated if:
- the acceleration is above the calibrated limit (e.g. steep descent);
- the deceleration is above the calibrated limit.
The system turns off automatically when the signals used by the Cruise Control software are incorrect because of component defects:
- vehicle speed sensor;
- accelerator pedal potentiometer;
- brake switch plausibility;
- Cruise control switch plausibility and Resume key;
- Cruise switch plausibility and speed increase or decrease lever positions.
