2009 RENAULT TWINGO engine coolant

61A-9
MR-413-X44-61A000$500_eng.mif
V1
HEATING
Fault finding - Function61A
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 controlSensor management
UCH
Heated rear screen control
management
Relay No. 1 for the
Passenger
Compartment
Heating resistorsRelay No. 2 for
the Passenger
Compartment
Heating
resistorsEngine cooling
fan assemblyEngine coolant
temperature sensor
Actuator controlSensor
management
Engine injection computer
Management of the additional heater (heater resistor control) depending on the equipment
Key:
Wire connections =
Multiplex connections =
Vehicle
multiplex
network

61A-11
MR-413-X44-61A000$625_eng.mif
V1
61A
HEATING
Fault finding - Conformity check
SUB-FUNCTION: HEATING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Test conditions: engine stopped, ignition on.
ComputerParameter or Status
checked or ActionDisplay and
notesFault finding
UCH (see 87B,
Passenger
compartment
connection unit)ET015:Passenger
compartment
blowerINACTIVE
(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 voltage10.5 V < X < 14.4 VIf there is a fault, refer to 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 circuit).
PR002: Exterior
temperature
(depending on
equipment)X = exterior temperature ± 5 °C
(invalid value: 215 °C)If there is a fault, refer to the
interpretation of this parameter
PR024: Engine coolant
temperatureX = engine coolant
temperature in ˚CIn the event of a fault, see the
interpretation of this parameter.
ET239: Ignition switch
position+ after ignition feedIn the event of a fault, refer to the
interpretation of this status.
PR025: Engine speed0 rpmIf there is a fault, refer to the
interpretation of this parameter
MR-413-X44-61A000$625_eng.mif

61A-12
MR-413-X44-61A000$625_eng.mif
V1
HEATING
Fault finding - Conformity check61A
SUB-FUNCTION: HEATING (CONTINUED)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on.
ComputerParameter or Status
checked or ActionDisplay and
notesFault finding
Injection
(see 13B, Diesel
injection or 17B,
Petrol injection)PR064: Coolant
temperatureX = engine coolant
temperatureIf there is a fault, refer to the
interpretation of this parameter
ET111: RCH number setNO
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: Passenger
compartment
heating resistor
cut-offYESIn the event of a fault, refer to the
interpretation of this status.

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MR-413-X44-61A000$625_eng.mif
V1
HEATING
Fault finding - Conformity check61A
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, vehicle speed zero.
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 circuit).
PR002: Exterior
temperature
(depending on
equipment)X = exterior temperature:
5 ˚C (invalid value:
215 ˚C)In the event of a fault, see the
interpretation of this parameter.

61A-15
MR-413-X44-61A000$625_eng.mif
V1
HEATING
Fault finding - Conformity check61A
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, vehicle speed zero.
ComputerParameter or Status
checked or ActionDisplay and
notesFault 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.

61A-19
MR-413-X44-61A000$875_eng.mif
V1
61A
HEATING
Fault finding - Fault finding charts
ALP 6 No heating or inadequate heating
NOTESCarry out these checks after a full check using the diagnostic tool (fault reading and
configuration checks).
Check that the fuses are sound.
Use a multimeter, current clamp and 21 W test light.
Use the Wiring Diagrams Technical Note, NEW TWINGO.
Is the air flow correct?
YES
Is the air distribution correct?
YES
With a warm engine, set the heating to max.
Is the blown air hot?
NO
Using the parameter and statuses screen on the
diagnostic tool (Heating and UCH or Climate
Control sub-functions: 62B), check that the
temperature signals are consistent (no sensor
deviation resulting in incorrect measurement).
For manual air conditioning systems:
–Use parameters PR002 Exterior temperature
(depending on option) and PR024 Engine
coolant temperature.
For climate control systems:
–Use parameters PR002 Exterior
temperature, PR004 Coolant temperature
and PR001 Interior temperature.
Are the temperature signals consistent?
YES
NOSee ALP3 Air flow fault, air flow fault.
NOSee ALP2 Air distribution fault, air
distribution fault.
YESIf necessary, explain how the system works to
the customer again.
Carry out a conformity check:
–For the coolant temperature sensor,
see 13B, Diesel injection, Fault
summary table or 17B Petrol injection,
Fault summary table.
–For the exterior temperature sensor,
see 87B, Passenger compartment
connection unit, Fault summary table.
–For the interior temperature sensor,
see 62B, Climate control, Fault summary
table.
Replace any faulty components.
NO
A
MR-413-X44-61A000$875_eng.mif

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MR-413-X44-61A000$875_eng.mif
V1
HEATING
Fault finding - Fault finding charts61A
ALP 6
CONTINUED 1
With the engine warm and
passenger compartment
ventilation operating, vary the
position of the mixing flap from
the maximum cold position to
the maximum hot position and
check subjectively that there is a
dif ference in temperature.
Is a difference in temperature
noted?
YES
NO
For climate control systems:
Carry out a conformity check on the mixing motor (PR012
Mixing flap position). If the conformity check does not reveal
any faults, look for a mechanical fault on the mixing flap
(condition of the motor ’s notched sector, flap jammed inside the unit, etc.).
For manual air conditioning and heater versions:
Check the condition and routing of the mixing flap control cable.
Eliminate any constraints it may have such as kinks, restriction by plastic
clips, etc.
Replace the lead if necessary. Unclip the cable from the side of the heating/
air conditioning unit and check the stiffness of movement of each
component: control button and flap control on the air distribution unit. Check
that there is no mechanical fault with the mixing flap (flap jammed inside the
unit, etc.).
Carry out any necessary repairs.
Is the fault still present?
YES NO
Is the lower heater matrix pipe (coolant inlet) hot?
Note: Pipe located on the left-hand side of the
heater-air conditioning unit, near the engine bulkhead.
YES NO
End of fault finding
procedure.
Check that the heater matrix is not blocked: the top
heater matrix outlet pipe should be hot. Clean the
heater matrix or replace it if necessary (see MR 411,
Mechanical, 61A, Heating, Heater matrix: Removal
- Refitting).
Is the fault still present?
NO
Check the coolant circuit:
Check the level of the coolant circuit (too low a level
may unprime the circuit when driving at low loads and
when idling).
Check that the thermostatic valve opens at the
correct temperature, and replace the valve if
necessary (see MR 411, Mechanical, 19A, cooling,
thermostat:
Removal - Refitting).
End of fault finding
procedure.
A
B

61A-27
MR-413-X44-61A000$875_eng.mif
V1
HEATING
Fault finding - Fault finding charts61A
ALP 7 Too much hot air
NOTESCarry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagrams Technical Note, NEW TWINGO.
Is the air flow correct?
YES
Is the air distribution correct?
YES
Using the diagnostic tool statuses and
parameters screen (cold loop sub-function),
check that the temperature signals are
consistent (no sensor drift resulting in incorrect
measurement).
For manual air conditioning systems:
–Use parameters PR002 Exterior temperature
(depending on version) and PR024 Engine
coolant temperature.
For climate control systems:
–Use parameters PR002 Exterior
temperature, PR004 Coolant temperature
and PR001 Interior temperature.
Are the temperature signals consistent?
YES
NOSee ALP3, Air flow fault
NOSee ALP2, Air distribution fault.
NOCarry out a conformity check:
–For the coolant temperature sensor,
see 13B, Diesel injection, Fault
summary table or 17B Petrol injection,
Fault summary table.
–For the exterior temperature sensor,
see 87B, Passenger compartment
connection unit, Fault summary table.
–For the interior temperature sensor,
see 62B, Climate control, Fault summary
table.
Replace any faulty components.
A