Iveco Stralis AT/AD. Manual — part 317
77563
77565
It is a photodiode placed on vehicle dashboard to point out luminous intensity that the cabin receives from outside.
A) Sensor
77564
III.52
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
77571
77573
77572
ELECTRONIC SYSTEMS
III.53
S
TRALIS
AT/AD
Reduction gear motors
The four automatic system units are located in the heater/conditioner inside the cab, according to their functions.
Their electrical features are the same.
They are activated directly by the electronic centre at 24 V rated voltage and absorb from 20 to 40 mA. Motor resistance
= ~ 112 Ohm.
Maximum absorption at travel end is 200 mA, when the centre cuts supply off.
Their potentiometer is used as a return signal and when first lit, the centre detects and stores end travel values to divide
the operating field. It is supplied at 5V, its resistance = ~ 5 Kohm.
Pin-out
Pin
Cable colour
1
White
+/- 24V
2
Violet
+/- 24V
3
Blue
0V
4
Orange
0
÷ 5V
5
Green
+ 5V
6
-
Free
NOTE
If a ratio motor is replaced, it is MANDATORY to carry out the system RESET by disconnecting and
reconnecting vehicle batteries.
74244
A. Blower control module
A
III.54
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
This electronic circuit located in the heater/conditioner unit adjusts double fan radial blower speed with some 200 differ-
ent rates in the automatic mode and 8 in the manual mode.
The module is driven by the unit with a signal from 0 to 5 Volts while fans with a voltage from 0 to 24 Volts.
Pin
Cable
Function
1
0000
Negative direct from
the battery
2
7555
Centre control posi-
tive
3
7551
Positive direct from
the battery
77569
77568
77570
ELECTRONIC SYSTEMS
III.55
S
TRALIS
AT/AD
Solenoid valve (3 ways)
This one-directional NA unit is supplied by a battery-directed positive.
The electronic centre adjusts its duty cycle by supplying a mass.
This three-way valve performs all dosing and by-pass functions.
It is supplied by a battery-directed positive and is piloted by the negative supplied by the centre monitoring the duty
cycle.
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