DIAGNOSIS METHOD FOR VEHICLE SYSTEMS

A vehicle diagnostic system has a processor unit designed to be coupled to the vehicle to receive signals from the vehicle. The processing unit is connected to a long-term memory that stores instructions to be executed by the processing unit. The long-term memory also stores display values capable of being translated into a perceivable output. The instructions stored in the long-term memory include coding objects of a first type that are capable of calling other coding objects of the first type during execution. A random access memory is also coupled to the processing unit to receive a copy of some instructions stored in the long-term memory. At least one coding object of the first type copied into the random access memory includes a reference to a display value stored in long-term memory. The display value is copied into a display portion of the random access memory during execution and is retrieved by a user interface coupled to the random access memory. The user interface is capable of creating a perceivable output based upon the retrieved display values.