Verification engine controller software

In an electronic engine control system having diagnostics for determining whether a component of the system has failed and a means for communicating with a diagnostic scan tool, a method for determining the quality of the system comprising:

• monitoring an engine parameter representative of the quality of a subsystem of interest;
• comparing said parameter to at least one quality limit, wherein said at least one quality limit is a function of a second parameter and represents an acceptable performance boundary for a fully functional engine control system;
• and
• based on the result of said comparing step, indicating whether said subsystem is of satisfactory quality.

In an electronic engine control system having diagnostics for determining whether a component of the system has failed and a means for communicating with a diagnostic scan tool having a display, a method for determining the quality of the system comprising:

• maintaining a timer;
• monitoring an engine parameter of interest while said timer is active;
• comparing said parameter to at least one limit;
• upon said parameter reaching said at least one limit, comparing the present value of said timer to a quality boundary, wherein said quality boundary represents an acceptable performance boundary for a fully functional engine control system;
• and
• based on the result of said comparison of said timer to said quality boundary, causing the display to indicate whether said subsystem is of satisfactory quality.