coolant temperature RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Climate Control User Guide

62B-73
MR-413-X44-62B000$828_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 3 Air flow fault
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
Check that the customer knows how to work the air conditioning system properly.
Is the passenger compartment blower unit
working?
YES
Check that the air circuit (cabin filter, scuttle panel grille, air vents and extractors etc.) is not blocked.
If necessary, repair, clean or replace the cabin filter (see MR 411 Mechanical, 61A, Heating, Cabin filter:
Removal - Refitting).
Check that the blower blades are in good condition (see MR 412 Bodywork, 57A Interior equipment,
Passenger compartment blower: Removal - refitting).
Check that the blower unit is correctly sealed. Also check that the air distribution ducts (right-hand and left-hand,
upper and lower) are correctly connected to the housing as well as the refrigeration pipe in the glove box (if the
customer complains about a feeling of cold air on the passenger's side).
Repair if necessary.
Check that the air recirculation flap does not remain closed when in the recirculation position. On the diagnostic
tool, status ET062 Recirculation flap position should display OPEN (the flap can be seen by removing the
windscreen frame). Repair if necessary (apply the fault finding procedure for fault DF021 Recirculation motor
circuit).
With the passenger compartment filter removed, put
your hand into the housing to ensure that the
evaporator is not obstructed and that there is no ice.
Is the evaporator obstructed?
NO
NORepair, see ALP 5.
YESRemove the evaporator and clean if it is
obstructed.
If there is ice on the evaporator, carry out
a conformity check on the temperature
sensors (interior, exterior and coolant
temperatures).
Replace any faulty components.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 4
CONTINUED
Is there a fault with the distribution of air?
NO
Is there a fault with the flow of air?
NO
Is the heating insufficient?
NO
Check that the air recirculation flap does not remain closed when in the recirculation position. On the diagnostic
tool, status ET062 RECIRCULATION FLAP POSITION should show OPEN (the flap can be seen by removing
the windscreen frame).
Repair if necessary (apply the fault finding procedure for fault DF021 RECIRCULATION MOTOR CIRCUIT).
Is the fault still present?
YES NO
Carry out a conformity check on the temperature
sensors (interior, exterior and coolant
temperatures). Replace any faulty components.YESSee ALP 2, Air distribution fault.
YESSee ALP 3 Air flow fault.
YESSee 61A, Heating, Fault finding chart,
ALP 6: No heating or loss of heating.
End of fault finding procedure.
AFTER REPAIRCarry out a complete check with the diagnostic tool.

62B-80
MR-413-X44-62B000$874_eng.mif
V1

Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 8
CONTINUED 1
1
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
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).
Display the following status in the “User selection”
sub-function screen:
ET140 "air conditioning request" should be
ACTIVE and the “AC” symbol should be displayed
on the air conditioning control panel screen.
Is status ET140 ACTIVE?
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.
–For the interior temperature sensor,
see 62B, Climate control, Fault
summary table.
Replace any faulty components.
NOAir conditioning request interpretation fault
on the climate control computer. Carry out
fault finding on the climate control
computer (see interpretation of
statuses).
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.