Diagnosis

Diagnosis

Diagnosis with the PIWIS Tester is carried out via the CAN interface (diagnosis socket). Further key functions are available via the diagnosis interface:
- Readout and erasure of fault memory
- Output of measurement and operating data (e.g. actual values)
- Actuator control
- Coding
- Calibration processes

Fault Detection

The system incorporates a self-diagnosis facility which continuously monitors certain functions of the control unit or system components and records faults in a non volatile fault memory (EEPROM).

Sensor Default Values

As on the previous Boxster/S (986) models, in the event of a short-circuit or interruption of a sensor default values are employed to maintain operation of the a/c control system in emergency mode