The windscreen wash/wipe system is activated by the lever located on the right of the steering wheel, with the following functions: there are five possible positions for the lever, turning it upwards, corresponding to:- windscreen wiper off (stationary);- intermittent/automatic operation;- continuous slow operation;- continuous fast operation;- "antipanic" temporary fast operation (unstable position, turning the lever downwards).In the intermittent/automatic operation position three different positions can be selected by turning the ring nut:- on the "LOW" version the different intermittent speeds are switched on (from the slowest to the fastest;- on the "HIGH" version with the rain sensor: the different sensor settings are switched on: the activation of the rain sensor involves a windscreen wiper arm stroke as feedback to confirm that it has been switched on.The frequency of the windscreen wiper strokes is automatically adjusted depending on the amount of water on the windscreen detected by the sensor: the frequency varies continuously from nil (no stroke - windscreen dry) to wiping at the second continuous speed (heavy rain).The windscreen washer function can be activated by pulling the lever toward the steering wheel: this activates the windscreen washer pump: keeping the lever pulled also switched on the windscreen wiper in accordance with a specific control logic: the windscreen wiper is activated at the first speed: when the windscreen washer control is no longer present, an additional stroke is carried out.The screen washer fluid reservoir has a sensor that signals a decrease in the level by means of a special warning light in the instrument panel.The control of the functions described above is carried out by an electronic device inside the steering column switch unit which produces the intermittent function and controls the operation of the windscreen wiper motor and the windscreen washer electric pump.The windscreen wash/wipe circuit is protected by a specific fuse and controlled by the ignition-operated exclusion relay (INT/A) located in the junction unit under the dashboard. The windscreen wiper and the windscreen washer can be activated with the TEG inserted and after starting (INT/A).The correct operation of the rain sensor is controlled by the check function. If the rain sensor is not working properly, the windscreen wiper will operate intermittently whilst the instrument panel display will show the sensor failure.