On Board Diagnostics II

OBD II requires that all vehicle manufacturers comply with extensive fault monitoring capabilities for all emission related drivetrain control systems. These systems; ECM, AGS and EML must monitor their components electrically and monitor for plausible mechanical engine function. Additionally, OBD II provides a separate Diagnostic Link Connector (DLC) located in the vehicle interior to access OBD II fault codes with an aftermarket scan tool. BMW center technicians utilize BMW diagnostic equipment and software (DIS/MoDIC) to interface with all vehicle control systems.