| Properties of the self-diagnosis |
| The control unit for the diesel direct injection system is equipped with a fault memory. The fault memory is designed as a permanent memory. |
| If malfunctions occur in the monitored sensors or components, they are stored in the fault memory with indication of the fault type. Fault table → Chapter. |
| Faults which occur only temporarily (sporadically) are displayed with the suffix “/SP”. Possible causes of sporadic faults are e.g. a loose contact or a momentary line interruption. If a sporadic fault no longer occurs after 50 engine starts, it is automatically erased. |
| If faults are detected that are likely to influence the driving behaviour, the glow period warning lamp -K29- flashes. |
| The stored faults can be read out with the diagnostic unit -V.A.G 1552-, -V.A.G 1551- or -VAS 5051- → Chapter. |
| After the fault(s) has(have) been removed the fault memory must be erased → Chapter. |
Note | The following description only relates to vehicle system tester -V.A.G 1552- using the current program card 5.0. When not using the current program card or when using the fault read-out scan tool -V.A.G 1551- with integrated printer or using the vehicle diagnosis, measurement and information system -VAS 5051- a minor deviation in the display is possible. |
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