Data Display

Use a scan tool (Tech 2) to read the status of inputs and outputs for the class 2 serial data line (the BCM is not part of the class 2 line). Use this information to check that the module is sending and receiving the proper data. Each module uses data received from other vehicle systems in order to carry out some functions. Therefore, if a module receives the incorrect data from another vehicle system, the module may function improperly. Use the scan tool in order to review the data coming from its inputs and vehicle systems that interact with that module.