Maximum Engine Speed Control - Alfa Romeo 159 Training Material

ENGINE
I
NPUT PARAMETERS
E
LECTRICAL QUANTITY
Engine temperature
sensor
Voltage signal on pin A-
22
Engine speed sensor
Frequency on pins A55
and A40
Pre-cat lambda sensors
Voltage signal on pins:
K-77 and K-79
Post-cat lambda sensors
Voltage signal on pins: K-
75 and K-53

Maximum engine speed control

The ECU according to the engine speed:
over 6800 rpm, cuts off supply to the injectors (the maximum limit of 7000 rpm can be held for no longer
than 5 seconds)
resumes injector control under 6600 rpm.
Traccia Didattica Alfa 159-en-ridotta
ALFA 159 TRAINING MATERIAL
C
ONTROLLER
L
OGIC
MED 7.6.1
The ECU controls the solenoid
valve in alternating sequences
to wash-out the activated
carbon filter.
120/318
Fiat Auto S.p.A.
After Sales Training
O
UTPUT PARAMETERS
E
LECTRICAL QUANTITY
Fuel vapour intake
solenoid valve
Control voltage to pin A-18
Injectors
Voltage to pins:
A-50, A-49; A-47, A-48;
A-32, A-33; A-35, A-34
Motorised throttle
Voltage to pins A-15 and
A-30
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