Nissan Motor Company, Ltd. has determined that on some* 1997 and 1998 Infiniti Q45 and I30 vehicles, there is a possibility that the alternator may contain a damaged diode. This could result in an electrical short in the diode assembly which melts the plastic housing. If the combustible gas emitted by the melting plastic does not disperse due to airflow through the engine compartment, it can then ignite and in turn ignite the fan guide in the alternator. To prevent this condition from occurring, Infiniti is conducting a Voluntary Safety Recall Campaign to