Humidity sensor diagnostic systems and methods
View Patent ↗A diagnostic system for a vehicle comprises a humidity module and a fault diagnostic module. The humidity module outputs a first humidity value based on a humidity measurement of a humidity sensor of the vehicle and outputs a second humidity value based on humidity data from a data source that is external to the vehicle. The fault diagnostic module selectively diagnoses a fault in the humidity sensor based on the first humidity value and the second humidity value.
1. A diagnostic system for a vehicle comprising;
a global positioning system (GPS) that monitors a location of said vehicle; and
a communication module that transmits said location to a data source that is external to the vehicle and that receives humidity data from said data source,
wherein said data source generates said humidity data based on said location;
a humidity module that outputs a first humidity value based on a humidity measurement of a humidity sensor of said vehicle and that outputs a second humidity value based on said humidity data from said data source that is external to said vehicle;
a fault diagnostic module that selectively diagnoses a fault in said humidity sensor based on said first humidity value and said second humidity value; and
a disable module that prevents said fault diagnostic module from diagnosing said fault when said second humidity value is equal to a second predetermined value.
2. The diagnostic system of claim 1 wherein said humidity data corresponds to an estimate of a humidity measurement based on a second location that is determined based on said location.
3. The diagnostic system of claim 1 wherein said fault diagnostic module selectively diagnoses said fault when a difference between said first and second humidity values is greater than a first predetermined value.
4. A method for a vehicle, comprising:
monitoring a location of said vehicle;
transmitting said location to a data source that is external to said vehicle and that generates humidity data based on said location;
receiving said humidity data from said data source that is external to said vehicle and that generates said humidity data based on said location;
providing a first humidity value based on a humidity measurement of a humidity sensor of said vehicle;
providing a second humidity value based on said humidity data from said data source that is external to said vehicle;
selectively diagnosing a fault in said humidity sensor based on said first humidity value and said second humidity value; and
preventing said diagnosis when said second humidity value is equal to a second predetermined value.
5. The method of claim 4 wherein said humidity data corresponds to an estimate of a humidity measurement based on a second location that is determined based on said location.
6. The method of claim 4 further comprising diagnosing said fault when a difference between said first and second humidity values is greater than a first predetermined value.
7. A diagnostic system for a vehicle comprising:
a receiver module that receives a signal from a data source that is external to said vehicle, wherein said signal is one of a wifi signal and a television signal, and wherein humidity data is carried with said signal;
a humidity module that outputs a first humidity value based on a humidity measurement of a humidity sensor of said vehicle and that outputs a second humidity value based on said humidity data from said data source that is external to said vehicle;
a fault diagnostic module that selectively diagnoses a fault in said humidity sensor based on said first humidity value and said second humidity value; and
a disable module that prevents said fault diagnostic module from diagnosing said fault when said second humidity value is equal to a second predetermined value.
8. The diagnostic system of claim 7 wherein said fault diagnostic module selectively diagnoses said fault when a difference between said first and second humidity values is greater than a first predetermined value.
9. The diagnostic system of claim 7 wherein said humidity data is carried on a side band of said signal.
10. A diagnostic method for a vehicle comprising:
receiving a signal from a data source that is external to the vehicle,
wherein said signal is one of a wifi signal and a television signal, and
wherein humidity data is carried with said signal;
providing a first humidity value based on a humidity measurement of a humidity sensor of said vehicle;
providing a second humidity value based on said humidity data from said data source that is external to said vehicle;
selectively diagnosing a fault in said humidity sensor based on said first humidity value and said second humidity value; and
preventing said diagnosis when said second humidity value is equal to a second predetermined value.
11. The diagnostic method of claim 10 further comprising selectively diagnosing said fault when a difference between said first and second humidity values is greater than a first predetermined value.
12. The diagnostic method of claim 10 wherein said humidity data is carried on a side band of said signal.