Alfa Romeo 159 Training Material page 172

ENGINE
According to this strategy, the supercharger control in certain engine running conditions is inhibited by setting the
allowed supercharger percentage to a preset value.
RECOVERY AND FAILURE CONTROL SYSTEM:
In recovery conditions, can be set to 30%, 40%, 75% (supercharger off).
COLD START:
In this condition, a fixed value is held (supercharger off) for a time calculated according to start-up conditions.
The engine must not reach maximum value.
The calculated time can be very short to the extent that the parameter cannot be visualised with the diagnostic tool.
CLUTCH PEDAL PRESSED:
A fixed value (supercharger off) is set when the clutch pedal is pressed.
VERY LOW ENGINE SPEED:
In this condition, the presence of the turbo charger generates oscillations in the intake air column. This causes turbo
charger noise.
SUDDEN CHANGES FROM HIGH TO LOW ENGINE SPEED:
In this condition, the presence of the turbo charger generates oscillations in the intake air column. This causes turbo
charger noise. Note the setting to 30% and then straight back to 75% before being activated again.
SUDDEN CHANGES FROM HIGH LOAD TO LOW LOAD:
In this condition, the presence of the turbo charger generates oscillations in the intake air column. This causes turbo
charger noise.
Fan control
The ECU according to coolant temperature and coolant pressure in the climate control system operates the fans at
first and second speed.
I
NPUT PARAMETERS
E
LECTRICAL QUANTITY
Coolant temperature sensor
Voltage between pins:
A-41 and A-58
Traccia Didattica Alfa 159-en-ridotta
ALFA 159 TRAINING MATERIAL
C
ONTROLLER
L
OGIC
EDC-16C39
Fan control first and second speed
172/318
Fiat Auto S.p.A.
After Sales Training
O
UTPUT PARAMETERS
E
LECTRICAL QUANTITY
Relay 1 - 2 speed
Voltage to pins:
B-90 (1st speed)
B-69 (2nd speed)
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