Requested Air Flow Rate Potentiometer; Recirculation Function Switch; Compressor Enablement Switch (Air Refrigeration Circuit); Passenger Compartment Temperature Sensor - Fiat Bravo Service Manual

Auxiliary units
Climate control
50.
(o ' f |
~\
(¬
)
Wiring diagram
1. Recirculation function
2. Compressor enablement
3. Passenger compartment
sensor
Terminal
F U N C T I O N
1 Motor for ventilated sensor ( + )
2 Motor for ventilated sensor (-)
3
Earth for passenger compartment temperature sensor
4
Signal for passenger compartment temperature sensor
5 M A X - D E F
6
N.C.
8
0 4
r
R11 R 2 R3 R S R 6 J R 7
M
O O
j (+)
P4A08CH01
u
1 2 3 4
5 6
7 e
9 X)
12
11
CD CD czi •
1=1
P4A08CH02
switch
switch
temperature

Requested air flow rate potentiometer

This potentiometer is connected to the air
ventilation knob and detects the various a n -
gular positions, sending a signal to the elec-
tronic control unit: there are.four possible air
flow rates which are set manually ( 1 , 2, 3 e
4 ) , plus an "AUTO" position and " 0 " .
It receives a 5V supply from the control unit
and has a controlled earth and gives off a sig-
nal corresponding to the position of the
knob:
R1-R7=1500 Ohm±1%

Recirculation function switch

Pressing this switch engages the recircula-
tion function which is managed completely
manually:
Compressor enablement switch (air refrig-
eration circuit)
Pressing this switch enables the operation of
the compressor (air refrigeration circuit).
Passenger compartment temperature s e n -
sor
This is located in the climate control control
panel between the recirculation and c o m -
pressor switches.
It consists of an NTC sensor (R at 25°C = 2.2
kOhm), w i t h an operating range of between
+5°C and +45°C. The sensor is "ventilatat-
ed", in other words it incorporates a small fan
which is always supplied so that the temper-
ature reading is not affected by stagnant air
inside the dashboard giving a misleading pic-
ture.
These last three components make up a sin-
gle element which is connected by a single
connector.
F U N C T I O N
Terminal
Compressor operation
7
Warning lights operation (NC)
8
9 + 15
10 Ideogram lights ( + )
Ideogram lights (-)
11
Recirculation control
12
Bravo-Brava
98 range
Print no. 506.670/16