RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Manual Air Conditioning Owner's Guide

62C-31
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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: HEATING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine at idle speed, AIR CONDITIONING OPERATING
(air conditioning compressor engaged).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (continued)
(see 87B,
Passenger
compartment
connection unit)ET239:Ignition switch
position+ after ignition feedIn the event of a fault, refer to the
interpretation of this status.
PR025:Engine speed800 rpm ± 50 rpmIn the event of a fault, see the
interpretation of this
parameter.
PR024:Engine coolant
temperatureX = engine coolant
temperatureIn the event of a fault, see the
interpretation of this
parameter.
ET015:Passenger
compartment
blowerACTIVE
(according to test
conditions: see Notes).In the event of a fault, refer to the
interpretation of this status.
Note: This status only operates
for manual air conditioning and
heating versions.
PR001:Battery voltage12.5 V < X < 14.4 VIn the event of a fault, see the
interpretation of this
parameter.
If the fault is still present, carry
out fault finding on the charging
circuit (see MR 411 Mechanical,
16A, Starting - Charging).
PR002:Exterior
temperature
(depending on
the version)X = exterior
temperature ±± ± ±

5 ˚C
(invalid value: 215 ˚C).In the event of a fault, see the
interpretation of this
parameter.

62C-32
MR-413-X44-62C000$637_eng.mif
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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: HEATING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine at idle speed, AIR CONDITIONING OPERATING
(air conditioning compressor engaged).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
Injection (see 13B,
Diesel injection or
17B, Petrol
injection)PR064:Coolant
temperatureX = engine coolant
temperatureIn the event of a fault, see the
interpretation of this
parameter.
ET111:RCH number setYES or NO
Note: Depending on the
requirements of the
injection system (power
requirement, torque
reduction, etc.), the
injection computer sets
the controlled
passenger compartment
heating resistor stage
number (no more,
no less)In the event of a fault, refer to the
interpretation of this status.
ET112:RCH cut-offYES or NO
Note: Depending on the
requirements of the
injection system (power
requirement, torque
reduction, etc.), the
injection computer sets
the controlled
passenger compartment
heating resistor stage
number (no more,
no less)In the event of a fault, refer to the
interpretation of this status.

62C-33
MR-413-X44-62C000$637_eng.mif
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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: USER SELECTION
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine at idle speed, AIR CONDITIONING OPERATING
(air conditioning compressor engaged).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (see 87B,
Passenger
compartment
connection unit)ET028:Heated rear
screen buttonPRESSED if the heated
rear screen key on the
air conditioning control
panel is pressed.
RELEASED otherwise.In the event of a fault, refer to the
interpretation of this status.
ET029:Air conditioning
buttonPRESSED if the AC
button on the air
conditioning control
panel is pressed.In the event of a fault, refer to the
interpretation of this status.
ET015:Passenger
compartment
blowerACTIVE
(according to test
conditions: see Notes).In the event of a fault, refer to the
interpretation of this status.

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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUMMARY TABLE OF THE VARIOUS AIR CONDITIONING COMPUTER COMMANDS
Fault finding procedures for the commands listed in this summary are explained in the Workshop Repair Manuals
relating to the computer which generates the signal (see Introduction). Name of sub-function Name of computer Command name Fault finding
COLD LOOPInjection (see 13B, Diesel
injection or 17B, Petrol
injection)AC180: Air conditioning
compressor relay
controlIn the event of a fault, refer
to the interpretation of
this command.
AC153 High speed fan
assemblyIn the event of a fault, refer
to the interpretation of
this command.
AC154 Low speed fan
assemblyIn the event of a fault, refer
to the interpretation of
this command.
HEATINGUCH (see 87B,
Passenger
compartment
connection unit)AC060 Rear screen de-
icerIn the event of a fault, refer
to the interpretation of
this command.
Injection (see 13B, Diesel
injection or 17B, Petrol
injection)AC250 Heating resistor
relay 1In the event of a fault, refer
to the interpretation of
this command.
AC251 Heating resistor
relay 2In the event of a fault, refer
to the interpretation of
this command.
USER SELECTIONUCH (see 87B,
Passenger
compartment
connection unit)AC015 Air conditioning
button indicator lightIn the event of a fault, refer
to the interpretation of
this command.
AC019 Heated rear
screen indicator lightIn the event of a fault, refer
to the interpretation of
this command.

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MANUAL AIR CONDITIONING
Fault finding - Customer complaints
NOTESSpecial notes:
This section corresponds to the list of possible customer complaints.
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
PASSENGER COMPARTMENT ODOURS
UNPLEASANT ODOURS IN PASSENGER COMPARTMENT ALP 11
MR-413-X44-62C000$728_eng.mif

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WATER IN PASSENGER COMPARTMENT
WATER IS PRESENT IN PASSENGER COMPARTMENT ALP 12
CONTROL PANEL FAULT
NO CONTROL PANEL LIGHTING ALP 13
COMPRESSOR NOISES
COMPRESSOR NOISES ALP 14

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MANUAL AIR CONDITIONING
Fault finding - Fault finding charts
ALP 2 Air distribution fault
NOTESCheck that the air circuit (cabin filter, scuttle panel grille, air ducts etc.) is not blocked.
Make sure that the air circuit (cabin filter, scuttle panel grille, air ducts etc.) is not blocked.
Ensure that the passenger compartment blower is in good condition.
Repair, clean or change the cabin filter if necessary.
Ensure that the passenger compartment blower unit is properly sealed.
Repair if necessary.
Set the passenger compartment blower to maximum
speed with maximum hot or maximum cold and
move the temperature control.
Check that the blown air matches the request.
Is the air distribution correct?
NO
Remove the glovebox and the centre console in
order to visually check whether moving the control
causes the distribution flaps to move.
Is there movement?
NO
YESThe air distribution is operating correctly.
Explain to the customer how the system
operates.
YESCheck that the distribution flaps are in
good condition, the footwell distribution
flap linkages are in position, and that there
is no mechanical obstruction. If necessary,
repair or replace the air conditioning unit.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
MR-413-X44-62C000$819_eng.mif

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ALP 2
CONTINUED
Check that the cable routing is clean and that the cables are in good condition.
Repair if necessary.
Make sure that the controls are in good condition and that they move the cables correctly.
Repair if necessary.
End of fault finding procedure.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 3 Air flow fault
NOTES
Is the passenger compartment blower working?
Check all of the speeds: Does the flow vary in
accordance with the position of the speed switch?
YES
Make sure that the air circuit (cabin filter, scuttle panel grille, air ducts etc.) is not blocked.
Ensure that the passenger compartment blower is in good condition.
Clean or replace the cabin filter.
With the cabim 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
Ensure that the passenger compartment blower unit is properly 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.
Repair if necessary.
Does the fault disappear when the air distribution
is changed ?
NO
See ALP5.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
NORepair, see ALP 5.
YESRemove the evaporator and clean if it is
blocked.
If there is ice on the evaporator, perform a
conformity check on the temperature
sensors (exterior and coolant
temperatures).
Replace any faulty components.
YESEnsure that all the air vents are open.
If the fault is still present, refer to ALP 2.

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MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 4 Inefficient windscreen demisting
NOTESSpecial notes:
Check that the inside of the windows are not dirty, as this reduces the efficiency of
demisting.
Is the passenger compartment blower working?
YES
Check that the air extraction vents are not blocked.
Repair if necessary.
Is the fault still present?
YES
Ensure that there are no water leaks into the
passenger compartment which would significantly
increase the humidity and reduce the effectiveness
of the demisting.
Repair if necessary (see ALP 12).
Is the fault still present?
YES
Make sure that the compressor is operating
correctly by turning on the air conditioning.
Does the compressor work?
YES
NORepair, see ALP 5.
NOEnd of fault finding procedure.
NO
End of fault finding procedure.
NOSee, ALP8 No cold air
AFTER REPAIRCarry out a complete check with the diagnostic tool.