User's Manual

2
ASR system (electronic anti-skid device)
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ASR system (electronic anti-skid device)
The ASR system is designed to help
prevent skidding of the driving wheels during acceleration by means of the engine control unit (spark advance delay, engine throttle opening reduction and fuel injection cut-out) and of the rear brakes. The ASR system enhances the vehicle stability and improves active safety while driving, especially under the following conditions: – internal wheel skidding on curves
because of the dynamic load variations or excessive acceleration
– excessive power transmitted to the
wheels, also in relation to the road conditions
– acceleration on slippery, snowy or icy
roadbeds
– loss of road grip on wet roads
(aquaplaning).
The ASR system works jointly with the electronic suspension adjusting system: under normal conditions (SPORT mode off), stability in low and medium grip conditions has priority, while with the SPORT mode active, the system favors traction, thereby optimising vehicle's performance.
Activation The ASR system is automatically activated every time the engine is started and can be cut-out by pressing button A for about 2 seconds.
Press button A again to reactivate the
system. During all the system operating stages, the green warning light, accompanied by the message “ASR system intervention” will be lit up on the display.
Fault indicators In the event of a fault, the system is automatically disabled and cannot be reactivated. This condition is signalled, while driving, by the amber warning light, that comes on both on the
instrument panel and on the multi- function display, accompanied by the message "ASR system failure.
MSR function (engine braking torque adjustment) The ASR system is also desined to controls the engine braking torque when the accelerator pedal is released under low grip conditions (snow, ice, etc.): in these conditions, in fact, the engine's high braking torque may cause instability of the vehicle. The system, using the same sensors as the ABS, detects the skidding arising on one or both of the driving wheels when the accelerator is released and opens the motor driven throttle for the engine supply system, thereby reducing the braking torque and restoring the driving wheels' maximum grip conditions. WARNING: The maximum deceleration that can be obtained with the engine braking always depends on the tire grip on the roadbed. Snow or ice obviously reduce grip levels.