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· Engine running
· Following trouble codes
not stored: 21, 22, 33, 34
· The control unit
recognises an intake manifold absolute pressure which cannot occur under the
momentary engine load conditions.
These values are dependent on the engine speed and the throttle
valve position.
· Above conditions must be
fulfilled for at least 2 s
Effects:
Throttle
valve aperture smaller than 10%:
· Oxygen sensor regulation
is switched off, i.e. open oxygen sensor loop
· Engine speed higher than
1400 rpm: All 4 injectors are switched off
· Engine speed lower than
1400 rpm: Only 2 injectors are used
Throttle
valve aperture larger than 10%:
· None
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