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

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MANUAL AIR CONDITIONING
Fault finding - Role of components62C
–High and low pressure pipes:
●The High Pressure and Low Pressure pipes are composed of rigid aluminium pipes and flexible pipes that
enable engine-related movements to be absorbed.
●Two filler valves (High Pressure and Low Pressure) can be accessed in order to fill (or drain) the refrigerant loop.
●The connections must be checked in the event of a refrigerant fluid leak.
1Buffering capacity
2Expansion valve outlet
3Expansion valve inlet
4High pressure filler valve
5Low pressure filler valve
6Condenser inlet
7Condenser outlet
8Pressure sensor
9Compressor inlet
10 Compressor outlet
Figure 6: Cold loop pipes
●HEATING COMPONENTS
–Heater matrix:
The external air entering the heating and air conditioning device (HVAC) is heated by the heater matrix.

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MANUAL AIR CONDITIONING
Fault finding - Conformity check
SUB-FUNCTION: COLD LOOP
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on, AIR CONDITIONING
SWITCHED OFF (Passenger compartment blower unit switched off and air
conditioning compressor not activated).
Note:
Read the parameters when the vehicle is cold (in the morning) to check the conformity
of the temperature parameters (without thermometer). The temperatures should be
approximately equal (interior, exterior and engine coolant).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (see 87B,
Passenger
compartment
connection unit)PR002: Exterior
temperature
(depending on
the version)X = exterior temperature
± 5 ˚C (invalid value:
215 ˚C)In the event of a fault, see the
interpretation of this
parameter.
ET030: Air conditioning
request 2INACTIVE In the event of a fault, refer to the
interpretation of this status.
Note:
This status represents the
request from the UCH to the
injection computer to activate the
compressor.
ET015: Passenger
compartment
blowerINACTIVE
(according to test
conditions: see Notes).In the event of a fault, refer to the
interpretation of this status.
PR025: Engine speed0 rpmIn the event of a fault, see the
interpretation of this
parameter.
ET142: Engine
operating phaseSTOPPEDIn the event of a fault, refer to the
interpretation of this status.
MR-413-X44-62C000$637_eng.mif

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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
COLD LOOP SUB-SYSTEM (CONTINUED 1)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on, AIR CONDITIONING
SWITCHED OFF (Passenger compartment blower unit switched off and air
conditioning compressor not activated).
Note:
Read the parameters when the vehicle is cold (in the morning) to check the conformity
of the temperature parameters (without thermometer). The temperatures should be
approximately equal (interior, exterior and engine coolant).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
Injection
(see 13B, Diesel
injection or 17B,
Petrol injection)ET079:Air conditioning
presentYES
(automatic injection
computer configuration)If the status displays NO, refer
to the interpretation of this
status.
ET088:Compressor
actuation
requestINACTIVEIf the status displays ACTIVE,
refer to the interpretation of this
status.
ET004:Air conditioning
authorisationNO
(no authorisation with
engine stopped)In the event of a fault, refer to the
interpretation of this status.
PR037:Refrigerant
pressure 1 bar < X < 15 barIn the event of a fault, see the
interpretation of this
parameter.
PR055:Engine speed0 rpmIn the event of a fault, see the
interpretation of this
parameter.
ET023:Fast idle speed
requestABSENTIn the event of a fault, refer to the
interpretation of this status.

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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: COLD LOOP (CONTINUED 2)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on, AIR CONDITIONING
SWITCHED OFF (Passenger compartment blower unit switched off and air
conditioning compressor not activated).
Note:
Read the parameters when the vehicle is cold (in the morning) to check the conformity
of the temperature parameters (without thermometer). The temperatures should be
approximately equal (interior, exterior and engine coolant).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
Injection
(continued)PR064:Coolant
temperatureX = engine coolant
temperatureIn the event of a fault, see the
interpretation of this
parameter.
PR089:Vehicle speed0 mphIn the event of a fault, see the
interpretation of this
parameter.
PR125:Power absorbed
by the air
conditioning
compressor0 W (ambient
temperature 23 ˚C)In the event of a fault, see the
interpretation of this
parameter.
ET022:Low speed fan
assembly
requestINACTIVEIn the event of a fault, refer to the
interpretation of this status.
ET021:High speed fan
assembly
requestINACTIVEIn the event of a fault, refer to the
interpretation of this status.

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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: HEATING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on, AIR CONDITIONING
SWITCHED OFF (Passenger compartment blower unit switched off and air
conditioning compressor not activated).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (see 87B,
Passenger
compartment
connection unit)ET015:Passenger
compartment
blowerINACTIVE
(according to test
conditions: see Notes).In the event of a fault, refer to the
interpretation of this status.
PR001:Battery voltage10.5 V < X <14.4 VIf there is a fault, refer to the
interpretation of this
parameter If the fault is still
present, carry out fault finding on
the charging circuit (see MR 411
Mechanical, 16A, Starting -
Charging).
PR002:Exterior
temperature
(depending on
the version)X = exterior
temperature ±± ± ±
5 ˚C
(invalid value: 215 ˚C).If there is a fault, refer to the
interpretation of this
parameter
PR024:Engine coolant
temperatureX = engine coolant
temperature in ˚C.If there is a fault, refer to the
interpretation of this
parameter
ET239:Ignition switch
position+ after ignition feedIn the event of a fault, refer to the
interpretation of this status.
PR025:Engine speed0 rpmIf there is a fault, refer to the
interpretation of this
parameter

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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: HEATING (CONTINUED)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on, AIR CONDITIONING
SWITCHED OFF (Passenger compartment blower unit switched off and air
conditioning compressor not activated).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
Injection (see 13B,
Diesel injection or
17B, Petrol
injection)PR064:Coolant
temperatureX = engine coolant
temperatureIf there is a fault, refer to the
interpretation of this
parameter
ET111:RCH number setNO
Note: Depending on the
requirements of the
injection system (power
requirement, torque
reduction, etc.), the
injection computer sets
the controlled
passenger compartment
heating resistor stage
number (no more, no
less)In the event of a fault, refer to the
interpretation of this status.
ET112:Passenger
compartment
heating resistor
cut-offYESIn the event of a fault, refer to the
interpretation of this status.

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MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: USER SELECTION
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, ignition on, AIR CONDITIONING
SWITCHED OFF (Passenger compartment blower unit switched off and air
conditioning compressor not activated).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (see 87B,
Passenger
compartment
connection unit)ET028:Heated rear
screen buttonPRESSED if the heated
rear screen key on the
air conditioning control
panel is pressed.
RELEASED otherwise.In the event of a fault, refer to the
interpretation of this status.
Note:
This status only operates for
manual air conditioning and
heating versions.
ET029:Air conditioning
buttonPRESSED if the AC
button on the air
conditioning control
panel is pressed.
RELEASED otherwise.In the event of a fault, refer to the
interpretation of this status.
ET015:Passenger
compartment
blowerINACTIVE
(according to test
conditions: see Notes).In the event of a fault, refer to the
interpretation of this status.
Note:
This status only operates for
manual air conditioning and
heating versions.

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MR-413-X44-62C000$637_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: COLD LOOP
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine at idle speed, AIR CONDITIONING OPERATING
(air conditioning compressor engaged).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (see 87B,
Passenger
compartment
connection unit)PR002:Exterior
temperature
(depending on
the version)X = exterior temperature
± 5 ˚C (invalid value:
215 ˚C)In the event of a fault, see the
interpretation of this
parameter.
ET142:Engine
operating phaseRUNNING
Note: this status is
displayed by the UCH
but is produced by the
injection computer.In the event of a fault, refer to the
interpretation of this status
(see the INJECTION technical
note).
ET030:Air conditioning
request 2ACTIVEIn the event of a fault, refer to the
interpretation of this status.
Note:
This status represents the
request from the UCH to the
injection computer to activate the
compressor (refer to the
flowchart in the Configuration
and Programming section).
ET015:Passenger
compartment
blowerACTIVE
(according to test
conditions: see Notes).In the event of a fault, refer to the
interpretation of this status.
Note:
This status only operates for
manual air conditioning and
heating versions.
PR025:Engine speed800 rpm ± 50 rpmIn the event of a fault, see the
interpretation of this
parameter.

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MR-413-X44-62C000$637_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: COLD LOOP (CONTINUED 1)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine at idle speed, AIR CONDITIONING OPERATING
(air conditioning compressor engaged).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
Injection
(see 13B, Diesel
injection or 17B,
Petrol injection)ET079:Air conditioning
presentYES
(automatic injection
computer configuration)If the status displays NO, refer
to the interpretation of this
status.
ET088:Compressor
actuation
requestACTIVEIf the status displays INACTIVE,
refer to the interpretation of this
status.
ET004:Air conditioning
authorisationYESIf the status displays NO, refer
to the interpretation of this
status.
PR037:Refrigerant
pressure1 bar < X < 27 barIn the event of a fault, see the
interpretation of this
parameter.
PR055:Engine speed800 rpm ± 50 rpmIn the event of a fault, see the
interpretation of this
parameter.

62C-30
MR-413-X44-62C000$637_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Conformity check62C
SUB-FUNCTION: COLD LOOP (CONTINUED 2)
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine at idle speed, AIR CONDITIONING OPERATING
(air conditioning compressor engaged).
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
Injection
(continued 1)
(see 13B, Diesel
injection or 17B,
Petrol injection)ET023:Fast idle speed
requestPRESENTIn the event of a fault, refer to the
interpretation of this status.
PR064:Coolant
temperatureX = engine coolant
temperatureIn the event of a fault, see the
interpretation of this
parameter.
PR089:Vehicle speed0 mphIn the event of a fault, see the
interpretation of this
parameter.
PR125:Power absorbed
by the air
conditioning
compressor300 W < X < 5000 W
(ambient temperature
23 ˚C)In the event of a fault, see the
interpretation of this
parameter.
ET022:Low speed fan
assembly
requestACTIVE if the refrigerant
fluid pressure is less
than 19 bar, and
INACTIVE otherwiseIn the event of a fault, refer to the
interpretation of this status.
ET021:High speed fan
assembly
requestACTIVE if the refrigerant
fluid pressure is greater
than 19 bar, INACTIVE
otherwise.In the event of a fault, refer to the
interpretation of this status.