2000 RENAULT SCENIC air condition

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Exhaust gas recirculation
14
14-3
OPERATING PRINCIPLE
The valve is controlled by an RCO signal issued by the
injection computer. The RCO signal permits
modulation of the opening of the valve, and
consequently, the quantity of exhaust gas directed
back towards the inlet manifold.
The computer continuously carries out a test to detect
the position of the EGR valve flap.
OPERATING CONDITIONS
The parameters which determine the actuation of the
EGR valve are as follows:
– the coolant temperature,
– the air temperature,
– the air pressure,
– the accelerator pedal position,
– the engine speed.
The EGR function is cut if:
– the battery voltage is less than 9 volts,
– the engine speed is greater than 3000 rpm.,
– a characteristics map (engine speed/load) exceeds a
given threshold,
– the vehicle speed is less than 12 km/h, the engine
speed is less than 1000 rpm and if the coolant
temperature is greater than 60 ˚C for 40 seconds.
The EGR valve is not supplied after engine start
according to a coolant temperature characteristics
map.
time (s)The electric EGR valve is supplied for 40 seconds on
each return to idling speed if the air temperature is
greater than 15 ˚C.
Coolant
temperature (˚C)
15761R
1
2
4
5
6Solenoid supply
Sensor supply
Sensor earth
Solenoid earth
Sensor output
-20 0 17 20

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Alternator
16
16-2
REMOVAL
Put the vehicle on a 2 post lift.
Disconnect the battery as well as all electrical
connections on the alternator.
Separate the diesel filter from its mounting and
remove.
Unclip the power steering reservoir.
Release the air conditioning pipe at (A).
Remove:
– the wiring mounting support (1) and remove the unit,
– the front right wheel as well as the mudguard,
– the accessories belt.Special features of vehicles fitted with air
conditioning:
Before removing the accessories belt, check the
centreline of the automatic tensioner (see
section 07 "Accessories belt tension").
Loosen bolt (A), then bolt (B) until the shoulder is
exceeded while holding the automatic tensioner plate
using a 9.35 mm square, then relax the belt by moving
the ratchet in the direction of the arrow.
Remove:
– the bolts (A) and (B),
– the alternator mountings and remove the alternator. SPECIAL TOOLING REQUIRED
Mot. 1273 Tool for checking belt tension
16870R4
98837-1R4

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Alternator
16
16-3
REFITTING (special notes)
Refit in reverse order to removal.
The belts on vehicles fitted with air conditioning are
tensioned by bringing the automatic tensioner plate to
a stop at bolt (B), without forcing it, using a 9.35 mm
square.
See section 07 "Accessories belt tension" for the
belt tension value for vehicles without air conditioning.
NOTE: never refit a belt once it has been removed,
but replace it.
98837-1R1

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General
62
162AIR CONDITIONING
General
CONSUMABLES
– Oil for DELPHI HARRISON compressor:
PLANETELF PAG 488: 220 cm
3 ± 15
(to be ordered from ELF).
– Refrigerant:
R134a: 780 g ± 35 (Mégane)
R134a: 680 g ± 35 (Scénic)
– Compressor:
DELPHI HARRISON V5
62-1

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Compressor
62
62-2
SCENIC Compressor
REMOVAL
Drain the R134a refrigerant circuit (refer to the
procedure described in the "Air conditioning" manual).
Disconnect the battery.
Remove:
– the cooling assembly (see section 19 ),
– the alternator (see section 16),
– the R134a refrigerant pipes retaining bolt,
– the four compressor mounting bolts.REFITTING
Refitting is the reverse of removal.
Tighten the R134a refrigerant pipes retaining bolt on
the compressor to 3 daN.m.
Fill the R134a refrigerant circuit using the filling
equipment.
IMPORTANT:
When replacing the existing compressor with a new
compressor, it is essential to drain some of the oil from
the new compressor, so that the amount of oil in the
new compressor corresponds to the amount of oil
drained from the oil compressor.
99211S
Oil drained
new
compressor=Oil
in the new
compressor-Oil remaining
in the old
compressor

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Dehydration canister
62
62-3
SCENIC Dehydration canister
REMOVAL
Drain the R134a refrigerant circuit using the filling
equipment (refer to the procedure described in the
"Air Conditioning" manual).
Remove:
– the right hand mudguard,
– the mounting bolts which secure the pipes to the
dehydration canister,
– the two mounting bolts of the dehydration
canister (B).
Fit plugs to every hole to prevent any penetration by
moisture into the components.
REFITTING
Refitting is the reverse of removal.
Oil the threads with P.A.G. SP 10 oil and check that
the seals are in good condition.
Create a vacuum then fill the R134a refrigerant circuit
using the filling equipment (refer to the procedure
described in the "Air conditioning" manual).
When changing the dehydration canister, add 15 ml of
P.A.G. SP 10 oil to the compressor.
16763R

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Condenser
62
62-4
SCENIC Condenser
REMOVAL
Place the vehicle on a lift.
Drain the R134a refrigerant circuit (refer to the
procedure described in the "Air conditioning"
manual).
Remove:
– the six mounting bolts of the upper cross member,
– the two lower mounting bolts of the condenser on the
fan unit, then the two upper bolts,
– the mounting bolts of the pipes on the condenser.
Fit plugs to prevent any moisture penetration.
Remove the condenser.
98838S

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Pressure relief valve
62
62-5
SCENIC Pressure relief valve
REPLACEMENT
Drain the R134a refrigerant circuit using the filling
equipment (refer to the procedure described in the "Air
Conditioning" manual).
Remove the right hand cowl vent grille.
Slacken the left hand cowl vent grille.
Remove:
– the scuttle,
– the retaining bolt of the connection pipe, using a
5 mm Allen key
– the two retaining bolts of the pressure relief valve on
the evaporator using a 4 mm Allen key.
On refitting, ensure that the pipe seals are in good
condition.
Create a vacuum then fill the R134a refrigerant circuit
using the filling equipment (refer to the procedure
described in the "Air conditioning" manual). TIGHTENING TORQUES (in daN.m)
Pressure relief valve retaining bolt 0.6
Pipe retaining bolt 0.8
16766S