Skoda Octavia Workshop Manual page 35

OCTAVIA
on
Lower limit reached
Upper limit reached
ä
Short circuit to positive
ä
Short circuit to earth
Edition 10.99
S00.5107.53.20
Self-Diagnosis
Possible of fault
♦ Unmetered air upstream
of throttle valve control
unit
♦ Intake system blocked
(air cleaner or intake port)
♦ Short circuit to positive in
cable connection between
intake manifold change-
over valve -N156 and en-
gine control unit
♦ -N156 faulty
♦ Signal input in engine
control unit faulty (control
unit faulty)
♦ Short circuit to earth in ca-
ble connection between
intake manifold change-
over valve -N156 and en-
gine control unit
♦ -N156 faulty
♦ Signal input in engine
control unit faulty (control
unit faulty)
Possible
♦ High idling speed
♦ No power
♦ Poor acceleration
♦ Poor acceleration
- Eliminate unmetered air.
- Inspect intake system.
- Test -N156 ⇒ page 24-66.
- Replace engine control
unit ⇒ page 24-48.
- Test -N156 ⇒ page 24-66.
- Replace engine control
unit ⇒ page 24-48.
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