Meritor WABCO Toolbox is a personal computer diagnostics program. The Toolbox Software provides PC diagnostic capabilities for Meritor WABCO Vehicle Control Systems. The program provides three basic functions:
 • Displays both constant (e.g., ECU number) and changing (e.g., RPMs) information from the system under test.
 • Displays both the active and stored system faults, as well as the appropriate repair instructions.