2009 RENAULT TWINGO RS Heating And Air Conditioning - Manual Air Conditioning Workshop Manual

62C-41
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 4
CONTINUED
Check that the condensation evacuation port (water from the evaporator) is not blocked.
Repair if necessary.
Is there an air distribution fault?
NO
Is there an air flow fault?
NO
Is there a heater performance fault?
NO
Check that the recirculation flap is in the external air position.
Repair if necessary (see MR 411 Mechanical, 61A, Heating, Recirculation control cable: Removal -
Refitting).
YESSee ALP 2.
YESSee ALP 3.
YESSee 61A, Heating, Fault finding chart,
ALP 6: No heating or loss of heating.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-42
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 5 No passenger compartment ventilation
NOTESCheck that fuse F28 (30A) is in good condition.
Check that the air circuit (cabin filter, scuttle panel grille, air ducts etc.) is not blocked.
Is the air circuit in good condition?
YES
Check the condition of the passenger compartment blower blades.
Are the passenger compartment blower blades in good condition?
YES
Check that the air recirculation flap does not remain
closed when in the recirculation position.
Repair if necessary.
Is the fault still present when the air distribution is
changed?
NO
NO
If necessary, repair, clean or replace the
cabin filter (see MR 411 Mechanical, 61A,
Heating, Cabin filter: Removal -
Refitting).
NO
If necessary, repair, clean or replace the
passenger compartment blower blades
(see MR 411 Mechanical, 61A, Heating,
Fan assembly: Removal - Refitting).
YESEnsure that all the air vents are open.
If the fault is still present (see ALP2 Air
distribution fault).
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-43
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 5
CONTINUED 1
Using a multimeter in the voltmeter position, check for + 12 V on connection SP3 of component 164 and earth
MAN of component 319.
Are the checks correct?
YES NO
Is the vehicle fitted with electric windows?
YES NO
Carry out a continuity test on
connection SP3 between components
164 and 1428.Carry out a continuity test on connection SP3
between components 164 and fuse F28 (30A) of
component 1016.
YES NO NO YES
D
Repair the wiring. If there is a repair procedure
(see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.Check fuse
F28 (30A) of
component 1016.
Make sure that the control panel speed selection button works properly.
Position the speed selection button on speed 1 and carry out a continuity check between connection MAN and
connection 38AH of component 319.
Position the speed selection button on speed 2 and carry out a continuity check between connection MAN and
connection 38AJ of component 319.
Position the speed selection button on speed 3 and carry out a continuity check between connection MAN and
connection 38AK of component 319.
Position the speed selection button on speed 4 and carry out a continuity check between connection MAN and
connection 38AL of component 319.
Are the checks correct?
YES NO
Replace the air conditioning control panel.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-44
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 5
CONTINUED 2
Carry out a continuity test on connection 38AH between components 319 and 164.
Is the continuity correct?
YES NO
Carry out a continuity test
on connection 38AJ
between components 319
and 164.
Is the continuity correct?
YES NO
Carry out a continuity test
on connection 38AK
between components 319
and 164.
Is the continuity correct?
YES NO
Carry out a continuity test
on connection 38AL
between components 319
and 164.
Is the continuity correct?
YES NO
Fault on connection 38AL between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Fault on connection 38AH between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Fault on connection 38AJ between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Fault on connection 38AK between components 319 and 164. Repair the wiring.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-45
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 5
CONTINUED 3
Disconnect the connector of component 1156, position the speed switch in position V4.
Using a test light, check for + 12 V between connections 38DA and 38DB of component 1156.
Does the test light illuminate?
YES NO
Replace fan assembly 1 (see MR 411 Mechanical,
61A, Heating, Fan assembly control unit:
Removal - Refitting).
Is the continuity correct?
YES NO
Carry out a continuity test on connection 38DB
between components 1156 and 164.
Is the continuity correct?
YES NO
End of procedure. Fault on connection 38DB between components 1156
and 164. Repair the wiring. If there is a repair
procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.
Carry out a continuity test on connection 38DA
between components 1156 and 164.
Fault on connection 38DA between components 1156
and 164. Repair the wiring. If there is a repair
procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-46
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 5
CONTINUED 4
Using a test light, check for + 12 V between connection SP2 and earth MAM.
Is the test light lit?
YES NO
Using a test light, check for + 12 V between
connection BP1 of component 1428 and a chassis
earth.Using a test light, check for + 12 V between
connnection SP2 and a chassis earth.
Is the test light lit? Is the test light lit?
YES NO YES NO
Activate speed 1 and,
using a test light, check for
+ 12 V between
connection SP3 of
component 1156 and a
chassis earth.Carry out a continuity
test on connection
BP1 between
component 1428 and
fuse
F24 (30A) of
component 1016.Fault on connection MAM.
Repair the wiring. If there is a
repair procedure (see Technical
Note 6015A, Repairing
electrical wiring, Wiring:
Precautions for repair), repair
the wiring, otherwise replace it.Carry out a
continuity test
on connection
SP2 between
component
1428 and fuse
F29-15A of
component
1016 Is the test light lit? Is the continuity
correct?
YES NO YES NO
Replace the
fan assembly.Replace the
fan assembly
relay.Fault on connection MAM.
Repair the wiring. If there is
a repair procedure (see
Technical Note 6015A,
Repairing electrical
wiring, Wiring:
Precautions for repair),
repair the wiring, otherwise
replace it.
D
Is the continuity correct?
YES NO
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-47
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 5
CONTINUED 5
Check fuse F24-30A of
component 1016.Check fuse F29-15A of
component 1016.Fault on connection SP2. Repair
the wiring. If there is a repair
procedure (see Technical Note
6015A, Repairing electrical
wiring, Wiring: Precautions
for repair), repair the wiring,
otherwise replace it.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-48
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
Preliminary cold loop efficiency test
ALP 8 No cold air
NOTESConsult 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.
With 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.