Skoda OCTAVIA MK1 Service Manual page 141

Short circuit to earth
implausible signal
Signal outside
tolerance
00530
Throttle valve
positioner/potentiomet
er -G88- → Note
Open circuit/Short
circuit to positive
Open circuit/Short-
circuit to earth
implausible signal
Earth distribution to
t
-G39- defective
Corrosion due to
humidity in the plug
t connection for lambda
probe heater -Z19- or
lambda probe -G39 -
Lambda probe heater
t
does not operate
t -G39- defective
Signal input in the
engine control unit
t
defective (engine
control unit defective)
Open circuit in wiring
between -G88- and the
t
engine control unit or
short-circuit to positive t
Open circuit in wiring
between -G88- and the
t
engine control unit or
short-circuit to earth
-G88- defective/loose
contact in plug
t
connection for throttle
valve control unit -J338-
Signal input in the
engine control unit
t
defective (engine
control unit defective)
t Poor idling
Increased fuel
t
consumption
Sooting of spark
t
plugs
Increased emission
t
levels
The idle regulator is
deactivated; engine
runs in idle with
mechanically
defined amount of
air through the
emergency gap
changed idling
t
speed
t Cold start problems
Cold idling
t
problems
Rough load
t
alteration
reduced
t
performance
141
Fitting locations.
– Checking lambda
control → Chapter.
Read measured
value block, display
–
group 001
→ Chapter or 099
→ Chapter.
Replacing engine
–
control unit
→ Chapter.
Perform adaptation
– of the throttle
valve control unit
→ Chapter.
Inspecting throttle
–
valve control unit
→ Chapter.
Replacing engine
–
control unit
→ Chapter.