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Interrogating and erasing fault memory
Fault table
Notes:
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◆ If faults occur in the monitored sensors and components, these are stored in the fault memory together with an indication of type of fault.
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◆ Faults related to EPC are additionally indicated by the warning lamp for the electronic throttle control ("EPC warning lamp") which is situated in the dash panel insert. Notes on EPC system =>Page24-139.
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◆ Faults which cause the exhaust emission to deteriorate are displayed with an exhaust warning lamp in the dash panel insert. Notes on exhaust warning lamp =>Page 24-26.
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◆ The fault table is sorted according to the 5 digit fault code on the left.
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◆ If a stored fault does not appear within the next 40 engine starts, the fault code will be automatically erased.
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◆ Sporadic faults are marked "SP" (sporadic fault) on the V.A.G 1551 display. The word "sporadic" signifies individually occurring, random faults.
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◆ Do not immediately replace components indicated as faulty by the V.A.G 1551 but first check the wiring and connectors of these components against the current flow diagram. Also check the earth connections against current flow diagram. This is particularly relevant for faults recorded as "occurring sporadically" (SP).
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◆ If the connector is pulled off the engine control unit or if the battery is disconnected, all the stored values in the control unit will be erased. However, the contents of the fault memory are retained. If the engine is then started, it may run rough for a short period. In this case, the engine should be run at idle for a few minutes until the learning process is concluded.
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◆ After erasing the fault memory =>Page 01-71.
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