Acceleration Mixture Enrichment Control - Alfa Romeo 159 Training Material

ENGINE
I
NPUT PARAMETERS
E
LECTRICAL QUANTITY
Engine speed sensor
Frequency on pins A55
and A40
Knock sensors
Voltage between pins:
A-43 and A-58;
A-44 and A-59
Timing sensor 1
voltage on pin A-41
Timing sensor 2
voltage on pin A-56

Acceleration mixture enrichment control

The ECU in event of high acceleration demand, modifies the injection time and position of the throttle.
RECOVERY PROCEDURE
The ECU replaces the signal from the faulty air mass meter with the signal from the potentiometer integrated in the
throttle actuator.
Traccia Didattica Alfa 159-en-ridotta
ALFA 159 TRAINING MATERIAL
C
ONTROLLER
L
OGIC
MED 7.6.1
The ECU implements the following
logics in the event of knocking:
•
adapts spark advance (by
delaying it)
•
adapts injection times
•
resets all parameters when
knock disappears
117/318
Fiat Auto S.p.A.
After Sales Training
O
UTPUT PARAMETERS
E
LECTRICAL QUANTITY
Ignition coils
Voltage disconnected from
pins A-46; A-31; A-01; A-16
Injectors
Voltage to pins:
A-50, A-49; A-47, A-48;
A-32, A-33; A-35, A-34
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