Page 466 of 891

61
HEATING
61 - 4
Climate control unit
DISMOUNTING
Disconnect the battery.
Dismount :
- climate control box protector;
- climate control box gasket
- gas purge vessel;
- engine air filter.
Detach from clips the front wiring from the
central part of the climate control box.
Dismoun t, then:
- attachment screws of the climate con-
trol unit on the climate control box. - attachment screws of the central part
of the climate control box.
Disconnect and release the climate control
unit from the climate control box.
REMOU NT I NG
Perform the dismounting operations in the
reverse order. Tighten t he attachment screws of the c li-
mate control unit on the climate control box, in
the sequence shown in drawing (1,2,3 ).
The required tightening moment of the at-
tachment screws of climate control unit on the
climate control box is of 0,6 daNm. Connector
2
3 1
Pin Denomination 3 Blower control speed 1
4 Blower control speed 2
5 Blower control speed 3
12 Blower control speed 4
13 Blower control speed 4
14 Mass
15 Mass
15 12
5
3
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Page 471 of 891
61
HEATING
61 - 9
Control cables
DISMOUNTING
Dismounting of the control cables ( 1) may be performed without dashboard dismounting .
Dismo unt :
- ashtray;
- switches of the front doors electric windows;
- control panel as well as cables ( 1) attached to this one by screws.
Dismount the maintaining clips (2) in the cockpit lower part.
Release the cables.
1 2
R
EMOU NT I NG
Perform the dismounting operations in the reverse order.
Check the good operation of the controls.
Remount the control panel on the dashboard and central console.
continuity and resistance against vehicle’s mass,
front wiring between:
- cockpit fuse F 14 exit pin 7 climate control panel
- pin 9 climate control panel vehicle mass.
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Page 473 of 891

61
HEATING
61 - 11
CLI
MATE CONTROL BLOWER NOT WORKING
Replace fuse F 17. Check the fuse F 17 from cockpit. Is it ok?
Re pl a c e ve nt i l a -
tion-climate control
air distributor Check the continuity of the speeds switch of the climate control
panel for:
S
tep 1 – between pins A4 or A5 pin B5;
S tep 2 – between pins A4 or A5 pin B4;
S tep 3 – between pins A4 or A5 pin B1;
S tep 4 – between pins A4 or A5 pins A1 or A2.
Are they corresponding ?
Replace the front wiring. Is there 12 V between vehicle mass and pins A4 or A5 of the
connector (6) of the climate control panel ?
Check the continuity and resistance against vehicle’s mass
between:
- pin B5 climate panel pin 3 blower connector
- pin B4 climate panel pin 4 blower connector
- pin B1 climate panel pin 5 blower connector
- pin A1 climate panel pin 12 blower connector
- pin A2 climate panel pin 13 blower connector
- pin 15 blower connector vehicle mass
- pin 14 blower connector vehicle mass
Are they corresponding ?
Replace the cold air
blowing device.
No
No
No
No Yes
Dia gnose
Yes
Yes
Yes
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Page 481 of 891
62
AIR CONDITIONING
62 - 7
Particles filter
DISMOUNTIN G
Dismount the protector of the climate con-
trol box.
Remove from clips the wiring towards
blower casing from the D.S.A.F. Dismount then the particles filter protec-
tion cap from the attachment screw by slid-
ing it towards front of the vehicle.
Extract the particles filter, by easy folding
it.
R EMOU NT I NG
Remount in i ts place the part icles filter per-
forming the same dismounting operations.
REMARK :
Pay attention at the m ounting direction
of the fi lter the two arrows (A) must be
lined up.
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Page 482 of 891

62
AIR CONDITIONING
62- 8
Cold air blowing device (DSAF)
TIGHTENING MOMENTS (daNm)
Attachments screws of the expansion vale on the evaporator 0,6
Pipes attachment nut on evaporator 0,57
T ightening screw of the pipe attachment clamp on compressor 1,2
Pipes attachment nut on filter reservoir 1,4 – 2
P ipe attachment nut on condenser ∫ “ 1,8-2,2
P ipe attachment nut on condenser 5/8 “ 1 – 1,4
Pressure controller 0,9 ± 0,1
DSAF is the heat-e xtracting component
from cockpit and is mounted in the climate
maintenance box. In order t o cool the cockpit, the warm a ir
must be ab sorbed and re di st ri but e d t he
“cooled“ a ir. T he warm air is goi ng over t he
evaporator to, which is transmitting part of the
temperature, this one being gradually reduced. In the same time, the refrigerant fluid which
is passing through the evapora tor piping is
absorbing the heat from the air going over the
evapora t or a nd a t t he same pre ssure , i s
transformed from fluid to vapors. When coming
out from evaporator, the refrigerant fluid is in
vapor condition.
DISMOUNTIN G
Drain the AC unit.
Disconnect the battery.
Dismount :
- climate control protector;
- climate control box gasket;
- expansion vessel;
- engine air filter
Detach the front wiring from attachment clips
on the climate maintenance box closing plate.
Di smount the c limate maintenance box
closing plate. Dismount the nut (1) of the pipes attachme nt
clamp (2) on thermostatic expansion valves (3).
Mount protectors at the dismounted pipes.
Dismount the attachment screws (6 ) of the
thermostatic expansion valve.
Release t he thermostatic expansion valve
and mount protectors.
Extract the sealing gasket (7).
Mount protectors at the evaporator’s pipes (8).
23
1
4
910
7
5
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Page 486 of 891

62
AIR CONDITIONING
62- 12
Compressor
FUN CTION
The compressor is suction the vapors com-
ing from evaporator at low temperature and
pressure, compress them and transmit the gas
at high temperature and pressure towards con-
denser. The refrigerant fluid in entering in condenser
in vapors condition, at high temperature and
pressure, where, by condensing, is transmittin g
in the external environment the abstracted heat.
At condenser exit, the refrigerant fluid is in
liquid condition, at high pressure and tempera-
ture.
DISMOUNTIN G
Drain the refrigerant c ircuit t o a charging
station.
Disconnect the battery.
Disconnect the supply wiring connector of
the compressor clutch.
Dismount the screw of attachment clamp
of the refrigerant pipes on compressor.
Cover the open piping with protectors.
Dismount the compressor-driving belt.
Dismount the four compressor attachment
screws.
Extract the compressor.
REMOU NT I NG
In case compressor is replaced, this one is
delivered filled with oil. Position the compressor with the filling cap
upwards. Mount the compressor attachment screws.
Tighten the compressor attachment screws
to the required moment of 2,1 daNm.
Remount the two refrigerant pipes and
tighten t he attachment clamp screw to the re-
quired moment of 1,2 daNm.
Mount the compressor -driving belt and ten-
sion it by acting upon the screw ( 1) according
to the method descri bed in chapter 07 “ Ac-
cessories belts tensioning”.
The tensioning values are :
150 - 155 Hz - compressor belt;
214 – 230 Hz – DA pump/compressor belt.
Connect the supply wire connector of the
compressor clutch. Vacuum and fill the circuit with refrigerant
fluid HFC 134a , by means of the charging sta-
tion (see chapter 62 “Draining – Filling unit
refrigerant circuit” ).
REMARK :
Before mounting c heck t he condition
of t he gaskets and lubri cate them wi th
compressor oil PAG SP 10.
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Page 497 of 891

62
AIR CONDITIONING
62 - 23
Replace fuses F
03,
F04, F17 or F26. Check fuses F03, F04, F17 and F26 from
cockpit.. Are they ok?
Replace front wiring .Is any n12 V voltage between:
- vehicle’s
mass pin 10 climate control panel ?
- vehicle’s mass pin 11 climate control panel ?
- vehicle’s mass pin 10 blower connector ?
- vehicle’s mass pin 11 blower connector ?
- vehicle’s mass pin A5 climate control panel ?
- vehicle’s mass pin A4 climate control panel ?
Replace cold air blowing device. Di
sconnect the bl ower connector. Connect pin 14 and pi n 15 to
the vehicle mass. Connect F26 fuse exit, in turn, to:
- pin 3 blower connector (step 1).
- pin 4 blower connector (step 2)
- pin 5 blower connector (step 3)
- pin 12, pin 10 a nd pin 11 blower connector (step 4)
Blower working and there is 12 V voltage at pin 9 blower
connector?
Check the continuity and resistance against vehicle’s mass between:
- pin B5 climate panel pin 3 blower connector
- pin B4 climate panel pin 4 blower connector
- pin B1 climate panel pin 5 blower connector
- pin A1 climate panel pin 12 blower connector
- pin 13 climate panel pin 9 blower connector
- pin 14 climate panel pin 1 blower connector
- pin 15 climate panel pin 2 blower connector
- pin 9 climate panel vehicle mass
- pin 8 climate panel vehicle mass
- pin 14 blower connector vehicle mass
- pin 15 blower connector vehicle mass
Are they corresponding ?
Replace
front wiring .
No
No
No
Ye s Ye s
Ye s
No
No
Replace ventilation-
climate air distrib ut or .Disconnect
the recycling flap motor connector.
Start the recycling flap motor.
Is there 12 V between the pins of the recycling flap motor connector?
Ye s Ye s
Dia gnose
CLI
MATE BLOWER FAN OR RECYCLING FLAP NOT WORKING
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Page 498 of 891
62
AIR CONDITIONING
62- 24
Dia gnose
CLIMATE CONTROL PANEL LIGHTING NOT WORKING
Replace fuse F14.
Replace front wiring . Check in c ockpit fuse F14. Is it OK?
Check the continuity and resistance against vehicle mass between:
- cockpit fuse F 14 exit pin 7 climate panel;
- pin 9 climate panel vehicle mass.
Are they corresponding ?
Replace the ventilatio n-climate
air distributor.
No
No Ye s
Ye s
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