Skoda Octavia Workshop Manual page 54

01
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Self-Diagnosis/Electrical Test
- Is there still a problem with the communica-
tion of the control units, then you have to
check the bus wires.
fault finding
♦ Two control units communicate over a „two-
wire bus system“.
♦ Three or more control units communicate
over a „two-wire bus system“.
is
- Switch off the ignition.
K - Unplug both control units.
- Check whether there is an open circuit in one
of the bus wires.
⇒ Current Flow Diagrams, Electrical Fault
Finding and Fitting Locations.
K - Test whether the bus wires have a short cir-
cuit to each other.
⇒ Current Flow Diagrams, Electrical Fault
Finding and Fitting Locations.
K - Test whether one of the bus wires has a short
circuit to positive or to earth.
ou are not
- As a check, replace the control unit which
can be exchanged with the minimal amount
of time and cost.
- If there is still a fault in the communication of
control units over the bus, replace the sec-
ond control unit.
d
t control units
a
to find fault in
OCTAVIA
Edition 08.98
S00.5116.54.20