General information
Cars are equipped with two types of devices, listed below.
Cruise control allows the vehicle to maintain a speed selected by the driver. This function can be switched off at any time by pressing the brake pedal, clutch pedal or one of the system switches.
The speed limiter allows the driver to set a maximum speed. Once the vehicle has reached the set speed, pressing the accelerator pedal does not result in a further increase in speed. The selected maximum speed can be exceeded at any time by overcoming the resistance of the accelerator pedal.
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These functions are controlled by the injection ECU, which communicates with the automatic transmission ECU and the instrument cluster. The set values are implemented using an electric throttle valve.
Note: "AOAC" page flashing (on-board computer) or the display indicates to the driver that maintaining the set speed is not possible (for example, when driving downhill).
General information
ECUABS:
- gives a signal "vehicle speed";
- gives the signal "brake pedal pressed".
Automatic transmission ECU:
- gives a signal "gear engaged", after which the set value is displayed on the instrument panel (regulated or limited) speeds;
- the two-color indicator lights up (when the cruise control is turned on, it lights up green; when the speed limiter is turned on, it lights up yellow).
Each time these functions are activated, the trip computer display (models in basic configuration) or widescreen display (models in full configuration) switches to the corresponding page.
Note: There is no special indicator lamp for the speed control/limiting function.
Governing bodies
Three-position switch (off, cruise control or speed limiter).
Steering wheel switches for changing the set speed, canceling the function or recalling the speed value from memory.
The accelerator and brake pedal limit switches are used in the injection system and for the brake light, respectively.
Clutch pedal switch (depending on the configuration) designed specifically for speed control function.
Note: The vehicle has two clutch pedal sensors (at the end of the stroke for engine start and at the beginning of the stroke for the cruise control function). The accelerator pedal must have a safety stop at the end of its travel.
Injection ECU:
- receives signals from the accelerator pedal limit switch;
- receives a signal from the brake pedal limit switch;
- receives signal from clutch pedal switch (depending on the configuration);
- receives signals from the switch (three-position);
- receives signals from the switches on the steering wheel;
- receives signals from the ABS ECU;
- receives signals from the automatic transmission control unit;
- sends signals to the instrument panel;
- controls the electric throttle body or the amount of fuel injected on diesel vehicles.
