Patent ID: 6631618
Filing Date: 2003-10-14
Classification: B60H,F25B

Abstract:
A method of testing and diagnosing an automotive air conditioning system comprising:connecting a first pressure transducer to a high pressure side of an automotive air conditioning system, the first pressure transducer being housed in a hand-holdable housing of a testing and diagnosing device; connecting a second pressure transducer to a low pressure side of the automotive air conditioning system, the second pressure transducer being housed in the hand-holdable housing of the testing and diagnosing device; storing a set of reference values of refrigerant pressures at different temperatures for different refrigerants in a memory of the device; storing a set of diagnoses based on said referrenre values; sensing a high side pressure of the automotive air conditioning system; sensing a low side pressure of the automotive air conditioning system; sensing an ambient temperature; associating the high side pressure, the low side pressure, and the ambient temperature with said set of reference values and matching with one of said set of diagnoses to form a diagnosis; and displaying the diagnosis on a display unit on the hand-holdable housing of the testing and diagnosing device.