2009 RENAULT TWINGO RS technical

62B-78
MR-413-X44-62B000$828_eng.mif
V1
CLIMATE CONTROL
Diagnostic - Fault finding chart

Vdiag No.: 44
62B
ALP 5
CONTINUED
Check the insulation and continuity of the following connections between component 1023 and the
intermediate connector:
●connection SP3
●connection MAN
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 insulation and continuity of the following connections between component 1023 and 1156:
●connection 38DB
●connection 38DA
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 insulation and continuity of connection SP3 between component 1428 and the intermediate
connector if the vehicle is fitted with front electric windows.
–Check the insulation and continuity of connection SP3 between component 1016 and the intermediate
connector if the vehicle is fitted with front manual windows.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
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.
Check that the passenger compartment blower blade is not broken or separated from its shaft (see MR 412
Bodywork, 57A Interior equipment, Passenger compartment blower: Removal - refitting).
Replace the passenger compartment blower if necessary.
With the connector disconnected, measure the resistance value of the
passenger compartment blower motor:
Check the resistance (approximately 0.180 Ω of component 1156
between connections 38DB and 38DA.
If the connection or connections are faulty (see Technical Note 6015A,
Repairing electrical wiring, Wiring: Precautions for repair), repair
the wiring, otherwise replace the passenger compartment blower.
Replace the passenger compartment blower if the resistance is zero or
equal to infinity.
If the fault is still present, replace the power module.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-79
MR-413-X44-62B000$874_eng.mif
V1
62B
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.

Vdiag No.: 44
MR-413-X44-62B000$874_eng.mif

62B-83
MR-413-X44-62B000$874_eng.mif
V1
CLIMATE CONTROL
Diagnostic - Fault finding chart

Vdiag No.: 44
62B
ALP 8
CONTINUED 4
Check the continuity of connection 49L between components 321 and 700.
Is the continuity correct?
NO YES
Continuity fault on connection 49L. If there is a repair
procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.Check that the low speed fan assembly relay operates
correctly (component 700). Replace it if it is faulty (see
MR 411 Mechanical, 81C, Fuses, Fuses: List and
location of components).
D
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-84
MR-413-X44-62B000$874_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 8
CONTINUED 5
Check the air conditioning compressor belt tension
(see Technical Note 3786A, Engine and
peripherals, 10A, Belt tension setting tool Hz
measurement: tension values).
Is the tension correct?
YES
With the engine stopped, use the diagnostic tool to
run command AC180 Air conditioning
compressor relay (injection command mode
menu).
Does the compressor clutch jam?
YES
E
NOReplace the belt (see MR 411
Mechanical, 11A, Top and front of
engine, Accessories belt: Removal -
Refitting).
NOConnect a test light between connections 38R
and MAS of component 171 and run
command AC180 Air conditioning
compressor relay.
Does the test light illuminate?
NO
Connect a test light between connection 38R
of component 171 and the chassis earth, then
run command AC180 Air conditioning
compressor relay.
Does the test light illuminate?
YES
Earth fault on component 171.
If there is a repair procedure
(see Technical Note 6015A,
Repairing electrical wiring,
Wiring: Precautions for
repair), repair the wiring,
otherwise replace it.
NO
F
YES
Check the condition of the
diode (component 322).
Replace the diode if it is faulty.
Replace the air conditioning
clutch (component 171) if
possible, otherwise replace
the compressor (see MR 411
Mechanical, 62A, Air
conditioning, Compressor:
Removal - Refitting).
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-85
MR-413-X44-62B000$874_eng.mif
V1
CLIMATE CONTROL
Diagnostic - Fault finding chart

Vdiag No.: 44
62B
ALP 8
CONTINUED 6
Check the continuity and insulation to earth of connection 38R between components 171 and 584.
Is the connection OK?
YES NO
Apply the fault finding procedure for command AC180
Air conditioning compressor relay (see 13B Diesel
injection or 17B Petrol injection).If there is a repair procedure (see Technical Note
6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise
replace it.
F
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-86
MR-413-X44-62B000$874_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 8
CONTINUED 7
2
With the engine warm and passenger compartment
ventilation operating, vary the position of the mixing
flap from the maximum hot position to the maximum
cold position and check subjectively that there is a
difference in temperature.
Is a difference in temperature noted?
YES
E
NOCarry 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.).
Is the fault still present?
YES NO
End of fault finding
procedure.
Check the cold loop by checking the condition of the pipes and ensuring that the air conditioning system
does not have any refrigerant leaks (see Technical Note 6001A, Air conditioning, 62A, Air conditioning,
Air conditioning: Check). Repair the faulty pipes or components.
Top up the refrigerant (see MR 411 Mechanical, 62A, Air conditioning, Refrigerant circuit:
Draining - Filling).
Is the fault still present?
NO YES
End of fault finding procedure. Replace the air conditioning compressor.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-87
MR-413-X44-62B000$874_eng.mif
V1

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.

62B-88
MR-413-X44-62B000$874_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 9
CONTINUED
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 difference in temperature.
Is a difference in temperature noted?
YES
Using the diagnostic tool statuses and parameters
screen (cold loop sub-function), check that the
temperature signals are consistent (no sensor
deviation resulting in incorrect measurement).
–Using parameters PR002 Exterior temperature,
PR064 Coolant temperature and PR001
Interior temperature.
Are the temperature signals consistent?
YES
Check the refrigerant fluid (see Technical Note
6001A, Air conditioning, 62A, Air conditioning,
Air conditioning: Check).
NOCarry 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.).
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.
AFTER REPAIRCarry out a complete check with the diagnostic tool.