2009 RENAULT TWINGO heating

62B-17
MR-413-X44-62B000$230_eng.mif
V1
62B
CLIMATE CONTROL
Fault finding - Function
GENERAL INFORMATION:
The climate control function which is fitted to the new Twingo depends on the three computers: injection, UCH and
climate control (DISTRIBUTED FUNCTION).
Fault finding on the air conditioning is performed in two different ways using the diagnostic tool.
The first procedure consists of performing fault finding on each computer which allows dialogue to be established
with just one computer (select the climate control computer).
The second procedure consists of performing fault finding on each function which allows communication with all
three computers belonging to the CLIMATE CONTROL function.
DESCRIPTION OF THE OPERATION OF THE CLIMATE CONTROL COMPUTER:
The climate control computer controls the passenger compartment ventilation, the distribution motor, the mixing
motor and the recirculation motor.
The climate control computer also controls the interior temperature sensor.
The sensor and the three motors are connected to the climate control computer by wire connections. The climate
control computer controls the passenger compartment ventilation using a modulated control signal (square pulse
signal) sent to a power module (MVPE) by a wire connection.
All other signals used by the climate control computer or transmitted by this computer to other computers are sent on
the multiplex network.
The production of cold air (cold loop) and hot air (heating) is controlled by the other two computers involved in the
CLIMATE CONTROL function (UCH and engine injection computer).
Special notes on operation:
–When the engine is stopped, the passenger compartment fan rotates more slowly than when the engine is
running.
–If any of the actuators are faulty, the air conditioning can no longer control them, but the setting requests are still
displayed on the control panel: warning lights light up, display of symbols on the control panel (distribution motor
position, passenger compartment blower speed, AC symbol, etc.).

Vdiag No.: 44
MR-413-X44-62B000$230_eng.mif

62B-19
MR-413-X44-62B000$230_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Fault finding - Function62B
Vehicle
multiplex
network
Summary diagram of components controlled or managed by the UCH:
Summary diagram of components controlled or managed by the injection computer Rear screen de-icing and
rear-view mirror de-icer
(depending on version)External
temperature sensor
(depending on
version)
Actuator control Sensor management
UCH
Air conditioning request
managementHeated rear screen control
management
Relay No. 1 for
the Passenger
Compartment
Heating
ResistorsRelay No. 2 for
the Passenger
Compartment
Heating
ResistorsAir conditioning
compressorEngine cooling
fan assemblyEngine
coolant
temperature
sensorRefrigerant
fluid
pressure
sensor
Actuator control Sensor management
Engine injection computer
Management of the cold loop (refrigerant pressure,
engine cooling fan activation request,
compressor activation authorisation, etc.)
Key:
Wire connections =
Multiplex connections =

62B-22
MR-413-X44-62B000$322_eng.mif
V1
62B
CLIMATE CONTROL
Fault finding - Configuration and programming
CLIMATE CONTROL COMPUTER CONFIGURATION
The climate control computer has three configuration functions. These configurations need to be set after replacing
the computer.
These three configurations are important as they ensure that climate control is optimised within the vehicle (better
control compared to automatic air conditioning). If these configurations are not entered correctly, cold air and warm
air production will be severely affected.
These configurations can be accessed in repair mode by the diagnostic tool and can only be entered using
the fault finding by computer menu as opposed to the fault finding by function menu.
These configurations can also be read using the diagnostic tool in repair mode to ensure they have been correctly
set. Configurations can be read in fault finding by computer mode and fault finding by function mode.
Configuration Option Configuration reading
CF044Vehicle type – New TwingoLC013Vehicle type
CF024Geographical zone– Zone 1
– Zone 2LC046Geographical zone
CF117Type of heating
resistors – None
– 900 WLC044Type of heating
resistors
WARNING
–The "ZONE 1" configuration must be selected for HOT AND HUMID COUNTRIES which correspond to the
technical and legislative criteria available on the Shared World Information.
–The "ZONE 2" configuration must be selected for TEMPERATE COUNTRIES which correspond to the
technical and legislative criteria available on the Shared World Information.
Note:
In hot and humid climates, when the heating and air conditioning system is in operation, condensation
may form on the outside of the windscreen.
The "ZONE 1" configuration corrects this customer complaint.
Note:
In fault finding by function mode, the diagnostic tool can also display the configuration readings of the other
computers involved in the air conditioning function. All of the air conditioning function configurations (of the
injection computer and UCH computer) are listed (See 62C, Air conditioning).

Vdiag No.: 44
MR-413-X44-62B000$322_eng.mif

62B-35
MR-413-X44-62B000$460_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Fault finding - Conformity check62B
HEATING SUB-FUNCTION
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped with ignition on (12 V APC), CLIMATE
CONTROL OFF (air conditioning compressor not engaged).
FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
Heated rear screenET086:Heated rear
screen: manual
modeINACTIVE In the event of a fault, refer to the
interpretation of this status.
ET085:Heated rear
screen:
automatic modeINACTIVE In the event of a fault, refer to the
interpretation of this status.
Passenger
compartment
ventilatorET141:Passenger
compartment
ventilatorRUNNING
or
STOPPED
After a user requestIn the event of a fault, refer to the
interpretation of this status.
Air mixing motorPR012:Mixing flap
positionFrom 0 % (“Maximum
cold” position: 15 ˚C)
to 100 % (“Maximum
hot” position: 27 ˚C).In the event of a fault, see the
interpretation of this
parameter.
HeatingPR045:Current heating
resistor power0 WIn the event of a fault, see the
interpretation of this
parameter.
TemperaturePR001:Interior
temperatureX = interior
temperature ± 5 ˚C
(invalid value: 87.5 ˚C)In the event of a fault, see the
interpretation of this
parameter.
PR002:External
temperatureX = exterior
temperature ± 5 ˚C
(invalid value: 215 ˚C)In the event of a fault, consult the
interpretation of this
parameter.
Note:
This parameter is displayed via
the climate control computer but
is generated by the UCH.
PR004:Coolant
temperatureX = engine coolant
temperature in ˚CIn the event of a fault, see the
interpretation of this
parameter.

62B-36
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V1

Vdiag No.: 44CLIMATE CONTROL
Fault finding - Conformity check62B
MAIN SCREEN
NOTESOnly carry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped with ignition on (12 V APC), AIR
CONDITIONING OFF (air conditioning compressor not activated).
Note:
This page lists the statuses and parameters provided by the climate control computer
but which are not associated with the three sub-functions given in the conformity
check (PASSENGER COMPARTMENT VENTILATION, COLD LOOP and HEATING
sub-functions).
FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
Electrical suppliesPR092:Battery voltage10.5 V < X <14.4 VIn the event of a fault, see the
interpretation of this
parameter.
ET083:+ 12 V after
ignition present ABSENT: Ignition off.
PRESENT: Ignition on.In the event of a fault, refer to the
interpretation of this status.
ET002:+ 12 V side
lightsABSENT: Side lights off.
PRESENT: Side lights
on.In the event of a fault, refer to the
interpretation of this status.
PR122:Night lighting
level15 % = minimum
lighting level
99 % = maximum
lighting level
(side lights
off: 102 %)In the event of a fault, refer to the
interpretation of this status.
Note:
This parameter is displayed via
the climate control computer but
is generated by the instrument
panel.

62B-40
MR-413-X44-62B000$460_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Fault finding - Conformity check62B
HEATING SUB-FUNCTION
NOTESOnly carry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine running, AIR CONDITIONING ON (air conditioning
compressor activated).
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
1Heated rear
screenET086: Heated rear
screen: manual
modeACTIVE: De-icing
request using the control
button.
INACTIVE otherwise.In the event of a fault, refer
to the interpretation of this
status.
ET085:Heated rear
screen:
automatic modeACTIVE: De-icing
request using the control
button. (“see clear”
function)
INACTIVE otherwise.In the event of a fault, refer
to the interpretation of this
status.
2Passenger
compartment
blowerET141:Passenger
compartment
blowerRUNNINGIn the event of a fault, refer
to the interpretation of this
status.
3Air mixing
motorPR012:Mixing flap
positionFrom 0 % (“Maximum
cold” position: 15 ˚C
to 100 % = “Maximum
hot” position: 27 ˚C).In the event of a fault, see
the interpretation of this
parameter.
4HeatingPR045:Current heating
resistor power0 < X < 900 WIn the event of a fault, see
the interpretation of this
parameter.
5TemperaturePR001:Interior
temperatureX = interior
temperature ± 5 ˚C
(invalid value: 87.5 ˚C)In the event of a fault, see
the interpretation of this
parameter.
PR002: External
temperatureX = exterior
temperature ± 5 ˚C
(invalid value: 215 ˚C)In the event of a fault, see
the interpretation of this
parameter
Note:
This parameter is displayed
via the climate control
computer but is generated
by the UCH.
PR004:Coolant
temperatureX = engine coolant
temperature in ˚C.In the event of a fault, see
the interpretation of this
parameter.

62B-41
MR-413-X44-62B000$460_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Fault finding - Conformity check62B
MAIN SCREEN
NOTESOnly carry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine running, AIR CONDITIONING ON (air conditioning
compressor activated).
This page lists the statuses and parameters provided by the climate control computer
but which are not associated with the three sub-functions given in the conformity
check (PASSENGER COMPARTMENT VENTILATION, COLD LOOP and HEATING
sub-functions).
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
1Electrical
suppliesPR092:Battery voltage10.5 V < X <14.4 VIn the event of a fault, see
the interpretation of this
parameter.
ET083:+ 12 V after
ignition present PRESENT:
Ignition on.In the event of a fault, refer
to the interpretation of this
status.
ET002:+ 12 V side
lightsABSENT: Side lights off.
PRESENT: Side lights
on.In the event of a fault, refer
to the interpretation of this
status.
PR122:Night lighting
levelBetween 15 % (minimum
lighting level) and 99 %
(maximum lighting level)
(side lights off: 102 %)In the event of a fault,
consult the interpretation
of this parameter
Note:
This parameter is displayed
by the climate control
computer but is generated
by the instrument panel.

62B-47
MR-413-X44-62B000$552_eng.mif
V1
CLIMATE CONTROL
Fault finding - Interpretation of statuses

Vdiag No.: 44
62B
ET085
HEATED REAR SCREEN: AUTO MODE
NOTESNone
This status specifies whether the heated rear screen is operated in automatic mode or not. This mode
corresponds to the SEE CLEAR function. This function switches on the heated rear screen, the heated door
mirrors, the air conditioning and the windscreen ventilation. The heating and air conditioning system requires a
short amount of time between the request and blower activation in order for dry air to be blown. The heated rear
screen will operate for as long as the SEE CLEAR function is requested (permanently controlled). This automatic
mode is obtained by pressing the de-icing button at the top of the air conditioning control panel.
If the SEE CLEAR function is requested, the status should display ACTIVE.
If the SEE CLEAR function is not requested, the status should display INACTIVE.
If the status does not operate as indicated (see ALP10 Poor de-icing efficiency - rear screen demisting).
AFTER REPAIRRepeat the conformity check from the start.
CLIM_V44_ET085