heating RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Climate Control Owner's Manual

62B-58
MR-413-X44-62B000$644_eng.mif
V1
CLIMATE CONTROL
Fault finding - Interpretation of parameters
Vdiag No.: 44
62B
PR045
CURRENT HEATING RESISTOR POWER
NOTESNone
The climate control computer receives the exterior temperature signal coming from the injection computer via the
UCH computer through the multiplex line.
This parameter indicates the heating power developed by the passenger compartment heating resistors.
The passenger compartment heating resistors are equipped with three power ratings, each having increments
of 300 W.
The parameter values are therefore 0 W, 300 W, 600 W and 900 W.
If this parameter appears inconsistent, run fault finding on the injection computer (see 13B, Diesel injection
or 17B, Petrol injection).
AFTER REPAIRRepeat the conformity check from the start.
CLIM_V44_PR045

62B-64
MR-413-X44-62B000$736_eng.mif
V1
CLIMATE CONTROL
Fault finding - Interpretation of commands

Vdiag No.: 44
62B
AC004
AC005
MIXER MOTOR: MAXIMUM COLD
MIXER MOTOR: MAXIMUM HOT
NOTESNOTES:
The flap is located in the air conditioning mechanism.
In order to confirm this command, the engine must be warm in order to be able to
check for the presence of a warm air flow during command AC005.
This command is used to activate the mixing flap to check that it is working. Switch on the ignition, and issue a
passenger compartment ventilation request (via the driver's control panel).
Run command AC004 and check that the air coming out of the air vents is cold (ambient temperature).
Run command AC005 and check that the air coming out of the air vents is warm.
If the command does not operate as indicated, consult the customer complaints:
–Production of cold air, see: ALP 8 No cold air and ALP 9 Too much cold air.
–Production of warm air, see: ALP 6 No heating or loss of heating.
AFTER REPAIRCheck that the air conditioning function operates correctly.
CLIM_V44_AC004 / CLIM_V44_AC005

62B-66
MR-413-X44-62B000$782_eng.mif
V1
62B
CLIMATE CONTROL
Fault finding - Customer complaints
NOTESSpecial notes:
General summary of all of the fault finding charts for each function.
DIALOGUE FAULT
NO DIALOGUE WITH THE COMPUTER ALP 1
AIR DISTRIBUTION PROBLEM
AIR DISTRIBUTION PROBLEM ALP 2
AIR FLOW FAULT ALP 3
INEFFICIENT WINDSCREEN DEMISTING ALP 4
NO PASSENGER COMPARTMENT VENTILATION ALP 5
HEATING FAULT
NO HEATING OR LOSS OF HEATING (section 61A) ALP 6
TOO MUCH HEATING (section 61A) ALP 7
AIR CONDITIONING FAULT
NO COLD AIR ALP 8
TOO MUCH COLD AIR ALP 9
INEFFICIENT REAR SCREEN DE-ICING/DEMISTING ALP 10

Vdiag No.: 44
MR-413-X44-62B000$782_eng.mif

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-76
MR-413-X44-62B000$828_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 4
CONTINUED
Is there a fault with the distribution of air?
NO
Is there a fault with the flow of air?
NO
Is the heating insufficient?
NO
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 show 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).
Is the fault still present?
YES NO
Carry out a conformity check on the temperature
sensors (interior, exterior and coolant
temperatures). Replace any faulty components.YESSee ALP 2, Air distribution fault.
YESSee ALP 3 Air flow fault.
YESSee 61A, Heating, Fault finding chart,
ALP 6: No heating or loss of heating.
End of fault finding procedure.
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

62B-95
MR-413-X44-62B000$920_eng.mif
V1
CLIMATE CONTROL
Diagnostic - Fault finding chart

Vdiag No.: 44
62B
ALP 14 Noisy compressor
NOTESOnly deal with this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
WARNING
Check that the computers active in the AIR CONDITIONING function (Injection, UCH
and climate control) are correctly configured.
Note:
Before starting any work, check that the noise is indeed coming from the compressor.
Check that the compressor belt is in good condition and check its tension (for engines without automatic
tensioning) (see MR 411, Mechanical, 11A, Top and front of engine, Accessories belt: Removal - Refitting).
Check that the compressor is correctly fixed (see MR 411 Heating and air conditioning system, 62A,
Air conditioning, Compressor: Removal - Refitting).
Check the refrigerant fluid and look for any leaks. Significant loss of fluid causes the compressor to make noises.
(see Technical Note 6001A, Air conditioning, 62A, Air conditioning, Air conditioning: Check).
If the fault is still present, replace the air conditioning compressor (see MR 411, Mechanical, 62A,
Air conditioning, Compressor: Removal - Refitting).
AFTER REPAIRCarry out a complete check with the diagnostic tool.