air filter RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Climate Control Workshop Manual

62B-11
MR-413-X44-62B000$138_eng.mif
V1
CLIMATE CONTROL
Fault finding - Role of components

Vdiag No.: 44
62B
–Condenser:
The condenser is composed of flat horizontal aluminium tubes. The pipes are divided by the vanes in order to increase
the air heat exchange and therefore cool the refrigerant fluid to produce condensation.
Condenser + Dehydrator reservoir
1Condenser
2Dehydration canister
–Dehydrator reservoir: (see figure above)
The dehydrator reservoir is used to:
●Check the condition of the refrigerant.
●Absorb the variations in volume (expansion bottle principle).
●Filter impurities.
●Absorb moisture (water in the circuit).
–Heating and air conditioning unit: (see figure above)
This unit acts as an air mixing box. It is equipped with a system of flaps which allow the air to be directed in accordance
with the requirements of the occupants whilst simultaneously allowing the temperature of the air entering the
passenger compartment to be modified by mixing hot and cold air.
–Thermostatic expansion valve: (see figure below)
This thermostatic-type expansion valve is used to check refrigerant expansion. It is located at the evaporator inlet.
–Evaporator: (see figure below)
●The evaporator is a heat exchanger which enables the air entering the passenger compartment to be cooled.
Note: Condensation of the air may occur thereby causing normal drops of water to form under the body.
Evaporator + expansion valve
1Expansion valve
2Evaporator

62B-63
MR-413-X44-62B000$736_eng.mif
V1
CLIMATE CONTROL
Fault finding - Interpretation of commands

Vdiag No.: 44
62B
AC002
AC003
RECIRCULATION MOTOR: EXTERIOR AIR
RECIRCULATION MOTOR: RECIRCULATION
NOTESWARNING
Do not touch the flap when running the command.
NOTE
The flap is located behind the cabin filter.
This command is used to actuate the air recirculation motor to check that it is working.
When running command AC003, the flap closes. When running command AC002, the flap opens.
If the command does not work as shown, check the mechanical condition of the flap.
If the fault is still present, apply the interpretation of fault DF021 Recirculation motor circuit.
AFTER REPAIRCheck that the air conditioning function operates correctly.
CLIM_V44_AC002 / CLIM_V44_AC003

62B-70
MR-413-X44-62B000$828_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 2 Air distribution fault
NOTESNone
Check that the air circuit (cabin filter, scuttle panel grille, air ducts and grilles etc.) is not blocked. Repair, clean
or change the cabin filter if necessary.
Also check that there is no air flow fault: (see ALP 3 Air flow fault).
Check that the blower unit is correctly sealed. Also check that the air distribution ducts (right-hand and left-hand,
upper and lower) are correctly connected to the housing as well as the refrigeration pipe in the glove box (if the
customer complains about a feeling of cold air on the passenger's side).
Repair if necessary.
Set the passenger compartment blower to
maximum speed with maximum hot or maximum
cold and move the air distribution control. Check
that the air outlet is the one selected.
Note:
For information about the air flows according to user
selection, refer to the air distribution table given in
the interpretation of parameter PR011 Distribution
flap position.
Has the customer complaint been confirmed?
YES
Remove the centre console and glovebox
(see MR 412 Bodywork, 57A, Interior equipment,
Removal - refitting procedures).
Remove the distribution motor and check the
condition of the flap control.
Is the flap control damaged?
NO
NOThe air distribution is operating correctly.
Explain to the customer how the system
operates.
YES
Replace the distribution - ventilation unit.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
CLIM_V44_ALP2

62B-73
MR-413-X44-62B000$828_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 3 Air flow fault
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
Check that the customer knows how to work the air conditioning system properly.
Is the passenger compartment blower unit
working?
YES
Check that the air circuit (cabin filter, scuttle panel grille, air vents and extractors etc.) is not blocked.
If necessary, repair, clean or replace the cabin filter (see MR 411 Mechanical, 61A, Heating, Cabin filter:
Removal - Refitting).
Check that the blower blades are in good condition (see MR 412 Bodywork, 57A Interior equipment,
Passenger compartment blower: Removal - refitting).
Check that the blower unit is correctly sealed. Also check that the air distribution ducts (right-hand and left-hand,
upper and lower) are correctly connected to the housing as well as the refrigeration pipe in the glove box (if the
customer complains about a feeling of cold air on the passenger's side).
Repair if necessary.
Check that the air recirculation flap does not remain closed when in the recirculation position. On the diagnostic
tool, status ET062 Recirculation flap position should display OPEN (the flap can be seen by removing the
windscreen frame). Repair if necessary (apply the fault finding procedure for fault DF021 Recirculation motor
circuit).
With the passenger compartment filter removed, put
your hand into the housing to ensure that the
evaporator is not obstructed and that there is no ice.
Is the evaporator obstructed?
NO
NORepair, see ALP 5.
YESRemove the evaporator and clean if it is
obstructed.
If there is ice on the evaporator, carry out
a conformity check on the temperature
sensors (interior, exterior and coolant
temperatures).
Replace any faulty components.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-91
MR-413-X44-62B000$920_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 11 Unpleasant odours in the passenger compartment
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
Check that the cabin filter is not blocked or damaged
(see MR 411 Mechanical, 61A, Heating, Cabin filter:
Removal - refitting).
Replace it if necessary.
Is the fault still present?
YES
Check that the condensate (water from the evaporator)
drain ring is not obstructed (beneath the body).
Repair if necessary.
Is the fault still present?
YES
Check the sealing of the heating unit in relation to the
engine compartment:
- Foam seal on the heater matrix coolant pipes fitted and
in good condition.
- Rubber seal on the radiator tank fitted and in good
condition (seal under the bonnet separating the engine
compartment from the windscreen aperture).
- Drain valve on the radiator tank fitted and in good
condition.
Repair if necessary.
Is the fault still present?
YES
Remove the passenger compartment filter to apply air
conditioning system cleaner using an extension piece on
the evaporator. Spray the entire contents of the aerosol.
Leave the product to work for 15 minutes.
NOEnd of fault finding procedure.
NOEnd of fault finding procedure.
NOEnd of fault finding procedure.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
CLIM_V44_ALP11