Diagnostic Trouble Codes - With Charts: Introduction: Notes
OBD-II Diagnostic Trouble Codes (DTCs) are accessed using a generic scan tool connected to vehicle Data Link Connector (DLC). See Fig 1. MINI trouble codes can be accessed using BMW's GROUP TESTER ONE (GT-1) or DISplus hardware system. These are often referred to as BMW SCAN TOOL.
The OBD-II connector is located in driver's footwell to left of steering column. See Fig 2
Control unit provides a substitute value if a failure occurs in an engine performance related component, such as engine (coolant) temperature sensor, intake air temperature sensor, airflow meter or exhaust gas oxygen sensor. These substitute values are canceled when normal engine operation is resumed.
NOTE:
All voltage tests should be performed with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless specifically stated otherwise in testing procedures.