diagram RENAULT TWINGO RS 2009 2.G Heating And Air Conditioning - Climate Control Workshop Manual

Heating and
air conditioning system
"The repair procedures given by the manufacturer in this document are based on the
technical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from
which his vehicles are constructed."
V1
All rights reserved by Renault s.a.s.
Edition Anglaise
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is forbidden without the prior written authority of
Renault s.a.s.
© Renault s.a.s.
V1 MR-413-X44-62B000$000_engTOC.mif
CLIMATE CONTROL
Vdiag No.: 44
Fault finding - Introduction 62B - 2
Fault finding - List and location of components 62B - 8
Fault finding - Role of components 62B - 10
Fault finding - Operating diagram 62B - 16
Fault finding - Function 62B - 17
Fault finding - Replacement of components 62B - 21
Fault finding - Configuration and programming 62B - 22
Fault finding - Fault summary table 62B - 24
Fault finding - Interpretation of faults 62B - 25
Fault finding - Conformity check 62B - 32
Fault finding - Status summary table 62B - 42
Fault finding - Interpretation of statuses 62B - 45
Fault finding - Interpretation of parameters 62B - 52
Fault finding - Command summary table 62B - 61
Fault finding - Interpretation of commands 62B - 62
Fault finding - Customer complaints 62B - 66
Diagnostic - Fault finding chart 62B - 68
Fault finding - Help 62B - 96
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Fault finding - Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document and the Technical Notes concerning the injection system fitted to
the vehicle, and the UCH):
–Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
–Visu-Schéma (CD-ROM), paper.
Type of diagnostic tools
–CLIP + multiplex line sensor
Special tooling required
3. REMINDERS
Procedure
To run fault finding on the vehicle computers, proceed as follows:
–turn the ignition key to APC,
–connect the diagnostic tool and perform the required operations.
To cut off the + after ignition feed, proceed as follows:
–disconnect the diagnostic tool,
–turn the ignition key to OFF,
–switch off the ignition. Vehicle(s): New Twingo
Function concerned: Climate controlComputer name: CAREG
Vdiag No.: 44
Special tooling required
Multimeter
Elé. 1681 Universal bornier
CLIM_V44_PRELI

Vdiag No.: 44
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Fault finding - Operating diagram
Summary diagram of all the components of the air conditioning system
1Evaporator
2Temperature sensor
3Compressor
4Condenser
5Fan assembly
6Pressure switch
7Dehydration canister
8Expansion valve

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Vdiag No.: 44CLIMATE CONTROL
Fault finding - Function62B
Vehicle
multiplex
network
Summary diagram of components controlled or managed by the UCH:
Summary diagram of components controlled or managed by the injection computer Rear screen de-icing and
rear-view mirror de-icer
(depending on version)External
temperature sensor
(depending on
version)
Actuator control Sensor management
UCH
Air conditioning request
managementHeated rear screen control
management
Relay No. 1 for
the Passenger
Compartment
Heating
ResistorsRelay No. 2 for
the Passenger
Compartment
Heating
ResistorsAir conditioning
compressorEngine cooling
fan assemblyEngine
coolant
temperature
sensorRefrigerant
fluid
pressure
sensor
Actuator control Sensor management
Engine injection computer
Management of the cold loop (refrigerant pressure,
engine cooling fan activation request,
compressor activation authorisation, etc.)
Key:
Wire connections =
Multiplex connections =

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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.
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Fault finding - Interpretation of faults

Vdiag No.: 44
62B
DF010
PRESENT
OR
STOREDMIXING MOTOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
CC.1 : Short circuit to + 12 V
NOTESConditions for running fault finding on a present or stored fault:
The fault is declared present when the temperature control is activated (minimum or
maximum temperature request and air conditioning control panel on).
Special notes:
Wait 1 minute after repairing the fault so that the climate control computer can control
the mixer motor. To avoid having to wait for 1 minute, switch the ignition off and then
back on again.
There is no specific programming operation for the mixing motor, however, after it has
been replaced, the motor needs to program its limits (minimum and maximum).
Use the Wiring Diagram Technical Note for the New Twingo.
Check the connection and condition of the connector of component 420.
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 B of component 419 disconnected, check the insulation and continuity of the following
connections between components 419 and 420:
●connection 38LC
●connection 38LD
●connection 38LG
●connection 38LH
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Connector of component 1115 disconnected,
Check the insulation and continuity of connection S between components 419 and 420.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Connector of component 419 connected and ignition on,
●Check for 12 V supply on connection S of component 420 in relation to earth NAM.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
If the supply is not present and if no faulty connections are detected during the continuity checks, contact your
Techline.
AFTER REPAIRClear the stored faults.
Follow the instructions to confirm repair.
If the motor has been replaced (see Configuration and programming).
Deal with any other faults.
CLIM_V44_DF010

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Fault finding - Interpretation of faults

Vdiag No.: 44
62B
DF012
PRESENT
OR
STOREDDISTRIBUTION MOTOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
CC.1 : Short circuit to + 12 V
NOTESConditions for running fault finding on a present or stored fault:
The fault is declared present with the air conditioning control panel on and the
distribution control activated (de-icing, ventilation, footwells, etc.).
Special notes:
Wait 1 minute after repairing the fault so that the climate control computer can control
the distribution motor. To avoid having to wait for 1 minute, switch the ignition off and
then back on again.
There is no specific programming operation for the distribution motor, however, after it
has been replaced, the motor needs to program its limits (minimum and maximum).
Use the Wiring Diagram Technical Note for the New Twingo.
Check the connection and condition of the connector of component 1115.
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 of component 419 disconnected, check the insulation and continuity of the following
connections between components 419 and 1115:
●connection 38KY
●connection 38KZ
●connection 38LA
●connection 38LB
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 420 disconnected, check the insulation and continuity of connection S
between components 419 and 1115.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Connector of component 419 connected and ignition on (air conditioning control panel on).
Check for 12 V supply on connection S of component 1115 in relation to earth NAM.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
If the supply is not present and if no faulty connections are detected during the continuity checks, contact your
Techline.
AFTER REPAIRClear the stored faults.
Follow the instructions to confirm repair.
If the motor has been replaced (see Configuration and programming).
Deal with any other faults.
CLIM_V44_DF012

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Fault finding - Interpretation of faults

Vdiag No.: 44
62B
DF021
PRESENT
OR
STORED RECIRCULATION MOTOR CIRCUIT
CO : Open circuit
CC.0 : Short circuit to earth
CC.1 : Short circuit to + 12 V
NOTESConditions for running fault finding on a present or stored fault:
The fault is declared present with the air conditioning panel on and the recirculation
control activated (recirculation selected for flap closed or exterior air selected for flap
open).
Special notes:
After repairing the fault (when the fault switches from present to stored), wait for
1 minute before the climate control computer is able to control the distribution motor.
To avoid having to wait for 1 minute, switch the ignition off and then back on again.
In extreme temperatures (above 35 ˚C) and when the climate control is switched on,
the recirculation flap sets itself to the recirculation position in order to correct the
passenger compartment temperature more quickly.
Use the Wiring Diagram Technical Note for the New Twingo.
Check the condition and connection of the connector of component 475.
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 B of component 419 disconnected, check the insulation and continuity of the following
connections between components 419 and 475:
●connection 38JA
●connection 38JB
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 resistance of component 475 between connections 38JA and 38JB.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Replace the motor if the resistance is not: 35 ΩΩ Ω Ω
± 5 ΩΩ Ω Ω
at 20 ˚C.
If the fault is still present, contact the Techline.
AFTER REPAIRClear the stored faults.
Follow the instructions to confirm repair.
If the motor has been replaced (see Configuration and programming).
Deal with any other faults.
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Fault finding - Interpretation of statuses

Vdiag No.: 44
62B
ET083
+ 12 V AFTER IGNITION PRESENT
NOTESUse the Wiring Diagram Technical Note for the New Twingo.
This status indicates activation of + 12 V APC by the UCH via the multiplex line.
When the ignition is off, the status displays ABSENT.
When the ignition is on, the status displays PRESENT.
If the status does not operate, carry out fault finding on the UCH (see 87B, UCH).
AFTER REPAIRRepeat the conformity check from the start.
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Fault finding - Interpretation of parameters
Vdiag No.: 44
62B
PR092
BATTERY VOLTAGE
NOTESUse the Wiring Diagram Technical Note for the New Twingo.
This parameter specifies the supply voltage of the climate control computer.
This parameter must display a voltage equal to: 10.5 V < X < 14.4 V with the engine running.
Using a multimeter, check the consistency of the parameter by measuring the voltage across the battery
terminals.
If the parameter corresponds with the voltage measured on the battery terminals, run fault finding on the electric
charging circuit.
If the parameter does not correspond with the battery voltage, check the condition and position of fuse F29 (15A)
in the passenger compartment fuse unit.
Consult section 81C Fuses.
Disconnect the connectors of the following components of connection SP2:
●Component connector 615
●Component connector 419
●Component connector 645
●Component connector 319
●Component connector 261
●Component connector 653
●Component connector 1428
With connector A of component 419 disconnected, check the insulation and continuity of connection SP2
between components 419 and 1016.
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 vehicle earth connection NAM of the connector of component 419.
If the connection is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for the
repair), repair the wiring, otherwise replace the wiring.
If these checks do not reveal any faults, carry out a test on each of the components involved in connection
SP2 (short circuit).
AFTER REPAIRRepeat the conformity check from the start.
CLIM_V44_PR092