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· Engine
not in operating condition: deceleration cutoff and deceleration
· Engine
speed greater than 672 rpm
· Mass
air flow signal less than 5.1 kg/h
(short circuit to ground or
circuit interruption)
· Conditions
must be fulfilled for at least 3 s
Replacement values:
· Trouble
codes 21 and 22 not recognized:
The control unit calculates
with an air mass calculated internally from the engine speed and throttle
valve angle
· Trouble
code 21 or 22 recognized:
The control unit calculates
with an air mass resulting from the engine speed
Effects:
· With
the exception of throttle valve adaptation, all adaptation is blocked
· Controlled
canister purge valve regulation is blocked, controlled canister purge valve
is closed
Trouble code 21 or
22 recognized:
· Oxygen
sensor regulation is blocked
Note:
In case of a fault, the system
immmediately switches to emergency operation
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