The vehicle is equipped with numerous electronic control units with an autodiagnostic function. When a diagnostic tester (Examiner or other device) is connected to these control units, self-diagnosis data can be read (parameters, errors) or the available active diagnostic tests can be carried out.All the diagnostic lines flow into the EOBD connector (European On Board Diagnosis) which conforms with Directive 98/69/CE (EURO 3) - ISO standard J1962 in the Body Computer connector C of M1.The same connector is responsible for the fault diagnosis of the nodes (control units) connected to the low transmission speed B-CAN, while the fault diganosis of the dynamic control high transmission speed C-CAN is carried out by means of a specific K line.The following are checked via the B-CAN line:- junction unit under the dashboard;- instrument panel;- Air Bag control unit;- climate control sytem control unit;- additional heater control unit (if present);- seat control units;- parking sensor control unit;- radio/navigator unit- Bluetooth control unit.For more details See E1050 CAN CONNECTION LINES The following are monitored via individual diagnostic K lines:- engine management control unit;- robotized gearbox control unit (only on versions with Robotized Gearbox);- ABS control unit;- electric steering control unit;- T.P.M.S. control unit (if present)i- xenon headlamps control units (if fitted).