METHOD AND SYSTEM FOR DETECTING MOTOR PROTECTION ABSENCE

摘要

A method of diagnosing the absence of a motor protection (110) of a motor vehicle (100 comprising the steps of: • estimating (210) an outside air temperature (Text) to the vehicle, • estimating (220) a temperature under the bonnet (Tscm), • determine (230) if the outside air temperature value is lower than the temperature value under the bonnet, • if yes, calculate (240) an absolute value (abs) a difference between the measurements of the outside air temperatures and under the engine hood, • determining (250) a diagnostic criterion (C) by calculating a difference between the said absolute value and a predetermined absolute value obtained in the presence of the protection under engine, • compare (260) the diagnostic criterion to a predetermined diagnostic threshold, and • transmit (270) a diagnostic signal depending on the result of the comparison.