2009 RENAULT TWINGO air conditioning

87B-32
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF027
PRESENT
OR
STOREDEXTERNAL TEMPERATURE SENSOR CIRCUIT
1. DEF : Abnormal voltage
CC.0 : Short circuit to earth
C0.1 : Open circuit or short circuit to + 12 V
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after the ignition is switched off and back on.
Note:
If the exterior temperature sensor is disconnected or the vehicle is not equipped with
an exterior temperature sensor, the temperature displayed is the default temperature
of 215 ˚C.
Check whether the right-hand door mirror is fitted with an exterior temperature sensor. (See MR 411 mechanical
systems 62A, Air conditioning, Air conditioning: List and location of components).
If the vehicle is fitted with an exterior temperature sensor, deal with the following fault finding procedure.
If NO, the vehicle is not fitted with this:
Check that the vehicle is configured without external temperature sensor (component code 240 for left-hand
drive vehicles) or (component code 239 for right-hand drive vehicles):
Check that LC002 "External temperature sensor" is "WITHOUT". Otherwise perform CF029 "External
temperature sensor".
Check the temperature sensor 2-track connector (bent, oxidised, broken tabs).
Check the PE2 40-track connector of the UCH, component code 645 (tabs bent, oxidised, broken).
If the connection is 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 insulation, continuity and the absence of interference resistance on the following connections:
●Connection code 47D between components 240 (for left-hand drive vehicles) or 239 (for right-hand drive
vehicles) and 645.
●Connection code 47C between components 240 (for left-hand drive vehicles) or 239 (for right-hand drive
vehicles) and 645.
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.
Measure the resistance of the sensor (connector disconnected) on connections 47C and 47D.
Temperature (˚C)
0
5
10
15
20
25
30
35Sensor resistance (Ω) ± 50 Ω
5980
5020
4280
3530
2900
2300
2010
1620
Replace the sensor if not correct (see MR 411 Mechanical systems 62A, Air conditioning, Exterior air
temperature sensor: Removal - Refitting).
If there is a fault, contact Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF027

87B-35
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF041
PRESENT
OR
STOREDHEATED REAR SCREEN INDICATOR LIGHT CIRCUIT
CC.1 : Short circuit to + 12 volts
NOTESApply this fault only to versions without heating or with manual climate control.
Conditions for applying the fault finding procedure to stored faults:
The fault appears after:
The ignition is switched of f and back on again and the rear screen de-icer is
requested.
OR
Running command AC019 Heated rear screen indicator light.
Check that fuses F29 (15 A) and F42 (10 A) are sound and correctly fitted in the passenger compartment fuse
and relay box (component code 1016) and/or heating.
Replace the fuse(s) if necessary.
Check the air conditioning control panel black 9-track connector, (component code 319) (bent, oxidised or
broken tabs).
Check that the earth on connection NAM of the manual air conditioning control panel black 9-track connector is
in perfect condition.
Check for + 12 V on connection LPD (by running command AC019 Heated rear screen indicator light) of the
manual air conditioning control panel black 9-track connector.
Check for + 12 V accessories feed on connection SP2 of the manual air conditioning control panel black 9-track
connector.
Check that the rear screen de-icing indicator comes on when activating command AC019 Heated rear screen
indicator.
Check the PE1 40-track connector of the UCH, component code 645 (tabs bent, oxidised, broken).
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF041

87B-37
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF042
PRESENT
OR
STOREDAIR CONDITIONING WARNING LIGHT CIRCUIT
CC.1 : Short circuit to + 12 V
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after the ignition is switched on and following an air
conditioning activation request with all the lights switched off.
Check that the type of air conditioning of the vehicle (equipment level) corresponds with the UCH configuration:
Check that LC013 Air conditioning type corresponds with the vehicle equipment level. Otherwise carry out
CF019 Air conditioning type.
Check that fuses F29 (15A) and F42 (10 A) are sound and correctly fitted in the passenger compartment fuse and
relay box (component code 1016).
Replace the fuse(s) if necessary.
Check the air conditioning control panel black 9-track connector, (component code 319) (bent, oxidised or
broken tabs).
Check that the earth on connection NAM of the manual air conditioning control panel black 9-track connector is
in perfect condition.
Check for + 12 V accessories feed on connections LPD and SP2 of the manual air conditioning control panel
black 9-track connector.
Check the PE1 and PE2 40-track connectors of the UCH, (component code 645) (tabs bent, oxidised, broken).
Check the insulation, continuity and absence of interference resistance of the following connections:
●Connection code 15A between components 319 and 645.
●Connection code 38ES between components 319 and 645.
●Connection code 38LP between components 319 and 645.
●Connection codes LPD and SP2 between components 319 and 1016.
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.
If the fault is still present, replace the air conditioning control panel (component code 319) (see MR 411
Mechanical systems 62B, Climate control, Control panel: Removal - Refitting).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF042

87B-74
MR-413-X44-87B000$480.mif
V5
UCH
Vdiag No.: 44PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87B
FUNCTION: AIR CONDITIONING
SUB-FUNCTION: USER SELECTION
* CPE: Electric central door locking.
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
FunctionParameter or Status
Checked or ActionDisplay and
NotesFault finding
User selectionET028:Heated rear screen
buttonDEPRESSED
RELEASEDIn the event of a fault, refer to
the interpretation of status
ET028.
ET029:Air conditioning
buttonDEPRESSED
RELEASEDIn the event of a fault, refer to
the interpretation of status
ET029.
ET015:Passenger
compartment blowerRUNNING
STOPPEDIn the event of a fault, refer to
the interpretation of status
ET015.
AC015:Air conditioning
button indicator lightThis command is used to test
the operation of the air
conditioning button indicator
light.In the event of a fault, refer to
the interpretation of DF042.
AC019:Heated rear screen
indicator lightThis command is for testing
operation of the heated rear
screen indicator light.In the event of a fault, refer to
the interpretation of DF041.
AC020:CPE* button
indicator lightThis command is used to
operate the electric central
locking button.In the event of a fault, refer to
the interpretation of DF082.
AC052:Hazard warning
lights indicator lightThis command is used to
activate the hazard warning
lights.In the event of a fault, refer to
the interpretation of DF134.

87B-75
MR-413-X44-87B000$480.mif
V5
UCH
Vdiag No.: 44PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87B
FUNCTION: AIR CONDITIONING
SUB-FUNCTION: HEATING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
HeatingET015:Passenger
compartment
blowerRUNNING
STOPPEDIn the event of a fault, consult the
interpretation of status ET015.
ET239:Ignition switch
position+ after ignition feed.
STARTING
ACCESSORIES FEEDIn the event of a fault, refer to the
interpretation of status ET239.
PR025:Engine speed0 rpmIn the event of a fault, carry out a fault
finding on the multiplex network
(see 88B).
And (see 17B, Petrol Injection,
Conformity check, Protection) or
(see 13B, Diesel Injection,
Conformity check, Protection).
PR001:Battery voltage9 V < X < 16 VIn the event of a fault, run fault finding
on the charging circuit (see 80A,
Battery).
PR002:External
temperature˚CIn the event of a fault, refer to the
interpretation of parameter PR002.
PR024:Engine coolant
temperature˚CIn the event of a fault (see 17B,
Petrol Injection, Conformity check,
Protection) (see 13B, Diesel
Injection, Conformity check,
Protection).
AC060:Rear screen de-
icerThis command is used to
test the operation of the
rear screen de-icer.In the event of a fault, refer to the
interpretation of command AC060.
AC110:Temperature
displayImportant: this command
lasts approximately
30 seconds.
This command is for testing
the display.In the event of a fault, refer to the
interpretation of command AC110.

87B-76
MR-413-X44-87B000$480.mif
V5
UCH
Vdiag No.: 44PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87B
FUNCTION: AIR CONDITIONING
SUB-FUNCTION: COLD LOOP
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
FunctionParameter or Status
Checked or ActionDisplay and notes Fault finding
Cold loopPR002:External
temperature˚CIn the event of a fault, refer to the
interpretation of parameter
PR002.
ET142:Engine operating
phaseSTOPPED
STARTING
RUNNING
STALLEDIn the event of a fault, refer to the
interpretation of status ET142.
ET015:Passenger
compartment
blowerRUNNING
STOPPEDIn the event of a fault, refer to the
interpretation of status ET015.
ET030:Air conditioning
requestThis request is sent by the
UCH to the engine
management computer.
There are two possible
scenarios:
1
st scenario: vehicle equipped
with manual air conditioning.
The request is made by
pressing the air conditioning
button.
2
nd scenario: vehicle
equipped with climate control.
The request is made following
a user request or climate
control computer request.In the event of a fault, refer to the
interpretation of status ET030.
PR025:Engine speed0 rpmIn the event of a fault, run fault
finding on the multiplex network
(see 88B, Multiplex) then run
fault finding on the injection
system (see 13B, Diesel
injection or 17B, Petrol
injection).

87B-84
MR-413-X44-87B000$528.mif
V5
87B
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Status summary table
*CPE: Electric central door locking
*RF: radio frequencyTool status Diagnostic tool title
ET008Blank UCH
ET015Passenger compartment blower
ET027Windscreen wiper park position
ET028Heated rear screen button
ET029Air conditioning button
ET030Air conditioning request 2
ET044CPE* button
ET045RF* signal. received
ET046Engine immobiliser
ET047Brake pedal position
ET061Open tailgate request
ET077Wiper stalk position
ET078Windscreen washer request
ET079Rear screen washer request
ET080Rear screen wiper request
ET081Lighting switch position
ET082Rear fog lights request
ET083Left-hand indicator request
MR-413-X44-87B000$528.mif
UCH
Vdiag No.: 44

87B-87
MR-413-X44-87B000$576.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses
UCH
Vdiag No.: 44
87B
ET015
PASSENGER COMPARTMENT FAN
NOTESNo faults should be present or stored.
Apply this status for vehicles fitted with manual air conditioning or heating.
Apply the checks if there is an inconsistency between the value of the status
and the air actually blown.
SPECIFICATIONSRUNNING
STOPPED
Check the configuration of the heating and air conditioning type of the vehicle:
–Check that LC013 "Air conditioning type" is "Heating" or "Manual" or "Automatic" according to the
equipment level. Otherwise carry out CF019 Air conditioning type.
Check the presence and condition of fuses F28 (30 A), F29 (15 A), F42 (10 A) on the passenger compartment
fuse and relay box (component code 1016).
Replace the fuse(s) if necessary.
Check the condition and connection of the connectors for the air conditioning control panel and blower unit
(manual air conditioning) (tabs bent, oxidised, broken).
AFTER REPAIRRepeat the conformity check from the start.
Carry out fault finding on the system.
UCH_V44_ET015