Data Display

Use a Tech 2 scan tool to read Body Control Module (BCM) status of inputs and outputs. Use this information to check that the BCM is sending and receiving the proper data. The BCM uses data received from other vehicle systems in order to carry out some functions. Therefore, if the BCM receives the incorrect data from another vehicle system, the BCM may function improperly. Use the Tech 2 scan tool in order to review the data conning from its inputs and vehicle systems that interact with the BCM.

For example, when a door is closed, the Tech 2 scan tool displays the input status of the door ajar switch as INACTIVE. When the door is open, the Tech 2 scan tool reads ACTIVE.

Use this kind of information when diagnosing a malfunction associated with a particular BCM input, or an input that is shared with another vehicle system.