• The ROC procedure can be performed on more than one wheel simultaneously; the important
thing is not to perform the procedure simultaneously on two wheels on the same side (e.g.
front right wheel and rear right wheel).
• Check that the wheels are able to turn freely and that the sensors are switched on and not locked.
• Press the "ROC" key (6, fig. 25) on any one of the sensors to start the procedure. Four
hourglasses appear on the screen to indicate the start of the measurement; when the
hourglasses disappear and the "OK" message appears on the four wheels, the measurement
of the initial position (0°) has been completed on all the wheels.
• Push the vehicle following the instructions (fig. 29) so as to turn the wheels by approximately 90°.
• Press the "ROC" button of any of the sensors again (2, fig. 25) to have the sensor store the
position.
• Wait for the audible signal and for the "OK" message to appear, indicating that the "90°"
position has been saved in memory for all the wheels.
• Move the car to the initial position, thus making the wheels rotate for about 90° in the reverse
direction until they reach their initial position (0°).
• Press the "ROC" button of any of the sensors again (6, fig. 25) to have the sensors store the
position.
• Wait for the audible signal and for the reappearance of the "OK" messages, indicating that the
"0°" positions of all the wheels have been saved in memory.
At the end of the compensation procedure, a screen appears containing icons, which represent
the operations to be carried out:
Lower the vehicle (only for "3-point ROC")
Settle the suspensions by bouncing the vehicle up and down
Lock the wheels using the special brake pedal depressor
Lock the sensors
• Carry out the operations indicated by the icons
• Press F3 (Enter) to confirm and advance to the next screen. This also concludes the
compensation procedure.
After ROC has been performed, if the selected vehicle requires certain databank values to be
varied as a function of the height of the chassis at specific points, the chassis clearance window
appears.
The operator must select the height values on the displayed tables, which most closely match
those of the vehicle in question. To make the selection, proceed as described in the paragraph
"General considerations".
In certain cases it is not possible to make a selection; the displayed height values are
"prescribed" values, i.e. the only correct references for databank values, to be achieved if
necessary by applying weights to the vehicle.
Executing "ROC 90" (push mode)
CHASSIS CLEARANCE WINDOW
34