| Functions of gearbox control unit |
| The automatic gearbox control unit -J217- is equipped with a fault memory. |
| If faults occur in the monitored sensors or components, they are stored in the memory together with an indication of the type of fault. |
| Faults which only occasionally are known as sporadic faults. Sporadic faults are additionally identified as such. |
| After analysing the information, the automatic gearbox control unit distinguishes among various faults ⇒ fault table → Chapter and stores them. |
| If faults do not occur again within at least 5 km or 6 minutes or at most 20 km or 24 minutes, they are stored as sporadic faults. |
| Electrical faults that affect vehicle performance can be determined with the fault reader -V.A.G 1551-. |
| The potential of self-diagnosis can only be fully exploited with operating mode 1 “Rapid data transfer” of fault reader -V.A.G 1551-. |
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