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When the control unit detects an error upon reception of data from
the pressure sensor, we recommend checking the sensor correct
operation with the "Sensor Test" function. If the sensor works
properly the faults may be due to the following reasons:
the vehicle antenna and/or the relevant electronics are faulty;
the sensor battery is low, so it is recommendable to repeat the "sensor test" several
times;
this problem occurs under particular driving conditions, so we suggest analysing with
the vehicle's owner the circumstances upon which the problem has occurred.
24.4.
Fault codes reset from the control unit memory
Once the fault has been removed it is good rule to reset the faults memorised in the
control unit to immediately switch off the fault warning light and avoid wrong diagnosis
in the future. To enable this function select the vehicle, then "Diagnostic DTC and "Erase
fault codes". Once this function is completed the sw will automatically go back to the
"Vehicle Diagnosis" section.
At the end of this function enter the fault code reading function mentioned before and
check that the fault memory has been reset.
If the errors still remain in the control unit even after performing the
reset function, it means that the faults cause has not been removed
and so the control unit considers the fault is still present.
24.5.
Settings
Some vehicle models can provide other supplementary functions, such as:
summer/winter tyre setting. In this case the vehicle on-board control unit can
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memorise 4 ID codes for the sensors fitted on the winter tyre rims and 4 ID codes
for the sensors fitted on the summer tyre rims. To avoid performing the 4 sensor
learning procedure upon each season change, you have the possibility to set the
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