RENAULT TWINGO RS 2009 2.G Heating And Air Conditioning - Manual Air Conditioning Service 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
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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.

62C-49
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 8
CONTINUED 1
1
Using the diagnostic tool statuses and parameters
screen (UCH heating sub-function), check that the
temperature signals are consistent (no sensor
deviations resulting in incorrect measurement).
–Use statuses PR002 Exterior temperature and
PR024 Engine coolant temperature.
Are the temperature signals consistent?
YES
Start the engine and switch on the air conditioning by
pressing the AC button (with a request for maximum
cold temperature and the passenger compartment
blower running).
2
Display the following status in the “User selection”
sub-function screen:
ET029 Air conditioning button should be
PRESSED.
Note:
The status indicates if the signal for the AC button
pressed on the control panel is read by the UCH
correctly.
Does status ET029 display PRESSED?
YES
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.
Replace any faulty components.
NOContinuity fault on connection 38LP.
Using an ohmmeter, carry out a continuity
test on connection 38LP between
components 319 and 645. If there is a
procedure (see Technical Note 6015A,
Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring,
otherwise replace the wiring.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62C-50
MR-413-X44-62C000$819_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Fault finding charts62C
ALP 8
CONTINUED 2
With the engine running at idle speed, use the
diagnostic tool to check that UCH does in fact
send the start air conditioning request to the
injection computer. Status ET030 Air conditioning
request 2 should display ACTIVE.
Is status ET030 “ACTIVE”?
YES
Using the diagnostic tool (injection cold loop sub-
function screen), display the following statuses:
- ET004 Air conditioning authorised,
- ET088 Compressor activation request.
Is status ET004 “YES” and status ET088
“ACTIVE”
NO
Check that the injection computer is correctly configured. Status ET079 CLIMATE CONTROL PRESENT should
display YES (cold loop sub-function screen).
Is status ET079 YES?
YESNOCheck that the UCH is correctly configured by
viewing the configuration reading LC013 Type
of air conditioning.
Should be “Manual air conditioning”
Reconfigure the UCH if necessary.
Check that the UCH is receiving the engine
operating status and passenger compartment
blower signals correctly (for manual air
conditioning). In the Cold Loop sub-function
screen, status ET142 “Engine operating
phase” should display “RUNNING” and status
ET015 “Passenger compartment blower”
should display “ACTIVE” and parameter
PR024 “Exterior temperature” should be >
3˚C.
If the parameter and statuses are not correct,
carry out fault finding on the multiplex network
and UCH (interpretation of status ET015,
ET142 and parameter PR024).
YES
NO
Interpretation fault for status ET079, see
conformity check, cold loop sub-function:
–13B, Diesel injection,
–17B, Petrol injection.
AFTER REPAIRCarry out a complete check with the diagnostic tool.