The AC164113 a Test Interface Board is aid to isolate application interfacing problems when using the MPLAB ICD 3 (DV164035) as a debugger or programmer. Using the test interface board and running confidence test options under MPLAB IDE allows testing of the basic functions and signals of an MPLAB ICD 3. The diagnostic results under MPLAB IDE let the user know when the MPLAB ICD 3 is fully functional or if there is a malfunction.