check engine light RENAULT TWINGO 2009 2.G Heating And Air Conditioning - Climate Control Workshop Manual

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62B
CLIMATE CONTROL
Fault finding - Interpretation of faults
DF001
PRESENT
OR
STOREDCOMPUTER
1. DEF: Internal electronic fault
NOTESConditions for running fault finding on a present or stored fault:
Apply this fault finding procedure if the fault reappears as present or stored after the
ignition is switched of f and on again.
Switch off the ignition and wait for the immobiliser warning light (Power-latch) to come one,
–Switch on the ignition again.
–Start the engine and switch on the air conditioning.
If the fault recurs, contact the Techline.
If the fault does not reappear: leave the climate control switched on and select various ventilation and air
distribution settings to check that the system is operating correctly.
–Check that no fault is displayed.
If the fault is still present, contact the Techline.
AFTER REPAIRFollow the instructions to confirm repair.
If the computer was replaced (at the request of the Techline), reconfigure the
computer (see Configurations and programming).
Deal with any other faults.
CLIM_V44_DF001

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CLIMATE CONTROL
Fault finding - Interpretation of faults

Vdiag No.: 44
62B
DF007
PRESENT
OR
STOREDINTERIOR TEMPERATURE SENSOR CIRCUIT
CC.0 : Short circuit to earth
CO.1 : Short circuit or open circuit to + 12 V
NOTESConditions for running fault finding on a present or stored fault:
Apply this fault finding procedure if the fault reappears as present or stored after the
ignition is switched on and air conditioning activation is requested with the engine
running.
Special notes:
The interior temperature sensor is located at the top of the roof in the unit under the
rear view mirror.
Use the Wiring Diagram Technical Note for the New Twingo.
Check the connection and condition (possible wiring damage) of the connector of component 1872.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the connector, otherwise replace the wiring.
With connector A of component 419 and connector of union R301 disconnected, check the insulation and
continuity of the following connections between components R301 (dashboard/interior lights intermediate union)
and 419.
●connection 38JN
●connection 38GZ
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
With the connector of component 1872 disconnected, check the insulation and continuity of the following
connections between components R301 (dashboard/interior lights intermediate union) and 1872.
●connection 38JN
●connection 38GZ
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 of connections 38JN and 38GZ of component 1872.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the resistance of component 1872 between connections 38JN and 38GZ.
Replace the sensor if the resistance is not 10 kΩΩ Ω Ω
± 500 ΩΩ Ω Ω
at 25 ˚C. For more details, consult the electrical
specifications of the sensor according to the temperature (see Help).
If the fault is still present, contact the Techline.
AFTER REPAIRClear the stored faults.
Follow the instructions to confirm repair.
Deal with any other faults.
CLIM_V44_DF007

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Vdiag No.: 44CLIMATE CONTROL
Fault finding - Conformity check62B
MAIN SCREEN
NOTESOnly carry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped with ignition on (12 V APC), AIR
CONDITIONING OFF (air conditioning compressor not activated).
Note:
This page lists the statuses and parameters provided by the climate control computer
but which are not associated with the three sub-functions given in the conformity
check (PASSENGER COMPARTMENT VENTILATION, COLD LOOP and HEATING
sub-functions).
FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
Electrical suppliesPR092:Battery voltage10.5 V < X <14.4 VIn the event of a fault, see the
interpretation of this
parameter.
ET083:+ 12 V after
ignition present ABSENT: Ignition off.
PRESENT: Ignition on.In the event of a fault, refer to the
interpretation of this status.
ET002:+ 12 V side
lightsABSENT: Side lights off.
PRESENT: Side lights
on.In the event of a fault, refer to the
interpretation of this status.
PR122:Night lighting
level15 % = minimum
lighting level
99 % = maximum
lighting level
(side lights
off: 102 %)In the event of a fault, refer to the
interpretation of this status.
Note:
This parameter is displayed via
the climate control computer but
is generated by the instrument
panel.

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Vdiag No.: 44CLIMATE CONTROL
Fault finding - Conformity check62B
MAIN SCREEN
NOTESOnly carry out this conformity check after a full check using the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine running, AIR CONDITIONING ON (air conditioning
compressor activated).
This page lists the statuses and parameters provided by the climate control computer
but which are not associated with the three sub-functions given in the conformity
check (PASSENGER COMPARTMENT VENTILATION, COLD LOOP and HEATING
sub-functions).
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
1Electrical
suppliesPR092:Battery voltage10.5 V < X <14.4 VIn the event of a fault, see
the interpretation of this
parameter.
ET083:+ 12 V after
ignition present PRESENT:
Ignition on.In the event of a fault, refer
to the interpretation of this
status.
ET002:+ 12 V side
lightsABSENT: Side lights off.
PRESENT: Side lights
on.In the event of a fault, refer
to the interpretation of this
status.
PR122:Night lighting
levelBetween 15 % (minimum
lighting level) and 99 %
(maximum lighting level)
(side lights off: 102 %)In the event of a fault,
consult the interpretation
of this parameter
Note:
This parameter is displayed
by the climate control
computer but is generated
by the instrument panel.

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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.

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Vdiag No.: 44CLIMATE CONTROL
Diagnostic - Fault finding chart62B
ALP 8
CONTINUED 3
Carry out fault finding on the injection system to ensure that no fault is present (if faults are displayed by the injection
computer, engagement of the air conditioning may be inhibited). If there are present or stored faults, carry out the necessary
repairs (see 13B, Diesel injection or 17B, Petrol injection).
Check that the refrigerant fluid pressure is correct (neither too low nor too high) using the PR037 Refrigerant fluid
pressure parameter (see Conformity check, Cold loop sub-function).
Check that the engine cooling fan assembly is at speed 1 by
viewing the following status on the cold loop sub-function
screen:
- Status ET022 Low-speed fan assembly request should
display ACTIVE.
Note:
These statuses are not displayed by all types of injection
(see Conformity check, Cold loop sub-function).
Does the engine cooling fan operate at low speed?
YES
NO
Using the diagnostic tool, run command
AC154 Low speed fan assembly relay.
Does the engine cooling fan operate at
low speed?
NO YES
Connector of component 321 disconnected. Connect a test
light between connection 49L of component 321 and the
chassis earth and run command AC154 Low speed fan
assembly relay.
Does the test light illuminate?
YES NO
Carry out fault finding
on the injection
system (sub-function:
cold loop and engine
cooling for low speed
fan assembly
activation).
Measure the resistance of component 321, between connections
49L and 49B of component 321. If the resistance measured is
infinite, replace the fan assembly resistor (component 321).D
AFTER REPAIRCarry out a complete check with the diagnostic tool.

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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.

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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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62B
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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MR-413-X44-62B000$920_eng.mif