DME 7.2 - 911 CARRERA & BOXSTER: General
Requirements for the OBD II System:
- Monitoring the efficiency of the catalytic converter (TWC).
- Detection of combustion misfiring.
- Monitoring of the tank ventilation system.
- Monitoring the tank system for leaks.
- Monitoring of the secondary air injection.
- Monitoring the adaptation limitation of the oxygen sensing system.
- Monitoring the oxygen sensors.
- Monitoring of other emission relevant components (former OBD I scope).
- Triggering the Malfunction Indicator Lamp (MIL or Check Engine) and storing faults in the memory.
- Protection against manipulation of control modules.
- Indication of monitoring readiness (Ready Code).
- Displaying the Diagnostic Trouble Code.
- Storing of operating parameters in the event of a fault (freeze frame).
- Functional checks of the OBD system (trip, warm-up cycle, driving cycle).
- Standardized control module tester (generic scan tool).
- Standardized read-out of operating data such as RPM, temperature, etc.
NOTE:
In order to ensure that a fault is no longer present after a repair or after the fault memory has been erased, a short test or test drive should be performed. Only in this way can you ensure that all diagnostic routines have been performed by the DME control module.
In the case of Tiptronic vehicles, the Tiptronic fault memory must also be read out, because activation of the Check Engine MIL can also be initiated by the Tiptronic.