Self-Diagnosis; Properties Of The Self-Diagnosis; Technical Data Of Self-Diagnosis - Skoda OCTAVIA Workshop Manual

OCTAVIA
Edition 10.03
S00.5122.54.20

Self-Diagnosis

Self-Diagnosis

Properties of the self-diagnosis

The control unit for the diesel direct injection sys-
tem is equipped with a fault memory. The fault
memory is designed as a permanent memory
and as a volatile memory.
If malfunctions occur in the monitored sensors
or components, they are stored in the fault me-
mory with indication of the fault type.
Depending on the analysis, the engine control
unit distinguishes the different fault information
⇒ Fault Table, page 01-8 and stores these faults
until the fault memory contents is erased.
Faults, which occur only occasionally (sporadi-
cally), are displayed as „sporadic“ with the suf-
fix „SP“. Possible causes of sporadic faults are
e.g. a loose contact or a momentary line inter-
ruption. If a sporadic fault no longer occurs af-
ter 50 engine starts, it is automatically erased.
The stored faults can be read out with the vehi-
cle system tester V.A.G 1552 or V.A.G 1551, if
necessary read out with VAS 5051 ⇒ page 01-5.
After the fault(s) has(have) been removed the
fault memory must be erased ⇒ page 01-6.
Notes:
♦ The following description only relates to the
vehicle system tester V.A.G 1552 using the
current program card.
♦ If the display of the vehicle system tester
reads „Information in the literature“ the re-
quired text is to be found in the fault table
according to the fault code.
♦ The use of fault read-out scan tool V.A.G 1551
(using current program card) with integrated
printer or VAS 5051 is similar. A minor devia-
tion on the display read-out is possible.

Technical data of self-diagnosis

Interrogating control unit version
The control unit version is displayed when you
connect the vehicle system tester V.A.G 1552
and select the control unit for the engine elec-
tronics ⇒ page 01-2.
01
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