fuse diagram RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Climate Control Workshop Manual

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CLIMATE CONTROL
Fault finding - Interpretation of parameters
Vdiag No.: 44
62B
PR092
BATTERY VOLTAGE
NOTESUse the Wiring Diagram Technical Note for the New Twingo.
This parameter specifies the supply voltage of the climate control computer.
This parameter must display a voltage equal to: 10.5 V < X < 14.4 V with the engine running.
Using a multimeter, check the consistency of the parameter by measuring the voltage across the battery
terminals.
If the parameter corresponds with the voltage measured on the battery terminals, run fault finding on the electric
charging circuit.
If the parameter does not correspond with the battery voltage, check the condition and position of fuse F29 (15A)
in the passenger compartment fuse unit.
Consult section 81C Fuses.
Disconnect the connectors of the following components of connection SP2:
●Component connector 615
●Component connector 419
●Component connector 645
●Component connector 319
●Component connector 261
●Component connector 653
●Component connector 1428
With connector A of component 419 disconnected, check the insulation and continuity of connection SP2
between components 419 and 1016.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Check the vehicle earth connection NAM of the connector of component 419.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
If these checks do not reveal any faults, carry out a test on each of the components involved in connection
SP2 (short circuit).
AFTER REPAIRRepeat the conformity check from the start.
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CLIMATE CONTROL
Diagnostic - Fault finding chart
ALP 1 No dialogue with the computer
NOTESSpecial notes: To run fault finding on the vehicle computers, use the key to switch on
the ignition.
Use the W iring Diagram Technical Note for the New Twingo.
Check that the vehicle is equipped with climate control.
Try to establish dialogue with a computer on another vehicle to make sure that the diagnostic tool is not faulty.
If the tool is not at fault, and dialogue cannot be established with any other computer on the same vehicle, the
cause could be a faulty computer interfering on the multiplex network.
Check the battery voltage and perform the necessary operations to obtain a correct voltage (9.5 V < Battery
voltage < 17.5 V, see section 16A Starting-charging).
Check:
–the connection between the diagnostic tool and the diagnostic probe (lead in good condition),
–the connection between the diagnostic sensor and the diagnostic socket (lead in good condition).
Carry out fault finding on the multiplex network using the diagnostic tool (see 88B, Multiplex).
Check the condition and position of fuse F29 (15 A) in the passenger compartment fuse box.
Consult section 81C Fuses.
Disconnect the connectors of the following components of connection SP2:

●Component connector 615
●Component connector 419
●Component connector 645
●Component connector 319
●Component connector 261
●Component connector 653
●Component connector 1428
Check the insulation and continuity of connection SP2 between components 419 and 1016.
Check the vehicle earth connection NAM of the connector of component 419.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
If these checks do not reveal any faults, carry out a test on each of the components involved in connection
SP2 (short circuit).
Check the condition and position of fuse F18 (10 A) in the passenger compartment fuse box.
Consult section 81C Fuses.
Disconnect the connectors of the following components of connection BP6:

●Component connector 995
●Component connector 419
AFTER REPAIRCarry out a complete check with the diagnostic tool.
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Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 5 No passenger compartment ventilation
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
Special notes:
The intermediate connector is located on the distribution-ventilation unit and the
passenger compartment blower unit control module is located slightly higher up,
below the heater matrix pipes.
Use the W iring Diagram Technical Note for the New Twingo.
Using the diagnostic tool, check that the passenger compartment
blower control setting given by the computer varies from 0 to 100 % by
checking parameter PR019 PASSENGER COMPARTMENT BLOWER
PWM SETTING (refer to the interpretation of this parameter).
Does the value vary?
Check that the control voltage (PWM) from the passenger compartment blower power module varies between 0
and 12 V (from 0 to 100 %) by measuring this voltage between connection 38LR of component 1023 and earth
MAN (connector disconnected).
Does the voltage vary correctly?
NOYES
Check the insulation and continuity of connection 38LR between components 419
and 1023.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for the repair), repair the wiring, otherwise replace the wiring.
Before ignition feed, check for + 12 V accessories feed on connection SP3 of
component 1023 in relation to the chassis earth.
●Check the continuity of connection MAN between the intermediate connector and
component 1023.
●Check the continuity of connection MAN between the intermediate connector and
the chassis earth.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for the repair), repair the wiring, otherwise replace the wiring.
If there is no +12 V accessories feed, check the condition and position of fuse F28 (30A)
in the passenger compartment fuse box. Consult section 81C Fuses.
If the checks do not reveal any faults, carry out conformity check on component 1016
and component 1428 if the vehicle is fitted with electric windows.
NOContact the
Techline.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
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CLIMATE CONTROL
Diagnostic - Fault finding chart
Preliminary cold loop efficiency test
ALP 8 No cold air
NOTESOnly deal with this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
Check that the engine speed is greater than 750 rpm and that the exterior
temperature is above 3 ˚C.
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagram Technical Note, NEW TWINGO.
Engine running, air conditioning in maximum cold
position and maximum ventilation speed. After
10 minutes, is the high pressure pipe at the
compressor outlet hot, and the low pressure pipe at
the evaporator outlet cold and iced up?
NO
Check the cleanliness of the condenser. Touch the
pipes: are they warmer at the inlet than the outlet?
YES
Is the dehydrator reservoir pipe hot at the inlet and
outlet?
YES
Is the expansion valve pipe hot at the inlet and
outlet?
NO
Is the evaporator pipe hot at the inlet and outlet?
NO
1
YES2
NOReplace the condenser (see MR 411
Mechanical, 62A, Air conditioning,
Condenser: Removal - Refitting).
NOReplace the dehydrator reservoir
(see MR 411 Mechanical, 62A, Air
conditioning, Dehydrator reservoir:
Removal - Refitting).
YESReplace the expansion valve (see MR 411
Mechanical, 62A, Air conditioning,
Expansion valve: Removal - Refitting).
YESReplace the evaporator (see MR 411
Mechanical, 62A, Air conditioning,
Evaporator: Removal - Refitting).
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 9 Too much cold air
NOTESOnly deal with this customer complaint after a full check with 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 Diagram Technical Note, NEW TWINGO.
With the engine running at idle speed and air conditioning switched off (AC button not pressed and no AUTO
mode), check that the air conditioning compressor clutch is not engaged.
Is the air conditioning compressor
clutch engaged?NO
YES
With the engine stopped, check that the compressor clutch electric control operates correctly, using the
diagnostic tool to run command AC180 Air conditioning compressor relay (injection command mode menu).
–During the command, connection 38R of component 171 must be supplied with + 12 V.
–After the command, connection 38R of component 171 must no longer be supplied with + 12 V.
Is the connection still supplied with + 12 V after the command?
YES NO
Check the continuity and insulation from + 12 V of
connection 38R between components 171 and 584.Check that the air conditioning compressor clutch is
not jammed (mechanical fault).
Is the connection OK? Is the clutch still engaged?
NO YES YES
If there is a repair procedure
(see Technical Note 6015A,
Repairing electrical wiring,
Wiring: Precautions for repair),
repair the wiring, otherwise
replace it.With the vehicle ignition off, check
that the compressor clutch relay is
not “jammed”, by checking the
continuity between connection
38R and connection AP3 of
component 584.
Is the continuity present?
NO
Apply the fault finding procedure for
command AC180 Air conditioning
compressor relay (see 13B Diesel
injection or 17B Petrol injection).
Is the fault still present?
Replace the air conditioning
compressor (see MR 411,
Mechanical, 62A, Air
conditioning, Compressor:
Removal - Refitting).
YES Replace the air
conditioning
compressor clutch
relay.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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CLIMATE CONTROL
Diagnostic - Fault finding chart
ALP 10 Inefficient rear screen de-icing/demisting
NOTESCarry out this conformity check after a full check using the diagnostic tool
(fault reading, especially UCH and injection faults and configuration checks).
Check that the fuses are sound.
Use a multimeter and a 21 W test light.
Use the Wiring Diagram Technical Note, NEW TWINGO.
Special notes:
Check that the inside of the windows are not greasy as this reduces the efficiency of
the de-icing.
Note:
The de-icing control is only authorised when the engine is running to save power.
The rear screen de-icer control is activated by pressing the de-icing button at the
bottom of the climate control panel in manual mode (with time delay and rear-view
mirror de-icer).
Ensure that there are no water leaks in the passenger compartment which would significantly increase the
moisture and reduce the effectiveness of the demisting function (see ALP 12 if the fault is noted).
Is the fault still present?
YES NO
Check that the UCH is correctly configured by viewing the configuration reading LC013 Type of air conditioning.
Reconfigure the UCH if necessary.
Check that the UCH receives the signal about the
status and operation of the engine. In the Cold Loop
screen, status ET142 "engine operating phase"
should display RUNNING.
Is status ET142 RUNNING?
YES
End of fault finding procedure.
NOCarry out fault finding on the UCH
(interpretation of status ET142) and on the
multiplex network.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 13
CONTINUED
Switch off the ignition and turn off the side lights.
Disconnect the connectors of components 101, 1081, 1222, 1391, 319, 184, 1390, 261, 653, 1016 and 419 of
connection LPD (see Wiring Diagrams Technical Note, Twingo 2 passenger compartment fuse board,
component code 1016, connection code LPD).
Check the insulation, continuity and the absence of interference resistance of connection LPD between
components 419 and 1016.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
YES
If the check does not reveal any electrical faults, check the conformity of the components on connection LPD
(component in short circuit, etc.)
Check the condition and position of fuse F42 (10 A) in the passenger compartment fuse box.
Consult section 81C Fuses.
Repair if necessary.
Is the fault still present?
YES
Contact the Techline.
NOEnd of fault finding procedure.
AFTER REPAIRCarry out a complete check with the diagnostic tool.