2009 RENAULT TWINGO display

62C-3
MR-413-X44-62C000$091_eng.mif
V1
MANUAL AIR CONDITIONING
Fault finding - Introduction62C
Faults
Faults are declared as either present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is switched on
after the + after ignition feed (without any system components being active).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors on these lines (corrosion, bent pins, etc.),
–the resistance of the component detected as faulty,
–the condition of the wires (melted or split insulation, wear).
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because the
data is inconsistent. Therefore, this stage is used to:
–carry out fault finding on faults that do not have a fault display, and which may correspond to a customer
complaint.
–check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Special notes regarding conformity checks for the air conditioning system:
The air conditioning system conformity check is divided into four parts. The parts relate to the four sub-functions of
the air conditioning system: heating, cold loop, user selection and passenger compartment ventilation. The statuses
and parameters related to these sub-functions are listed with their respective computers.
Special notes: The air conditioning control panel does not control electrical components (other than the passenger
compartment fan assembly) and it cannot support fault finding.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by
customer complaint. Note:
The interpretation of statuses, parameters and commands is also split into several sections. Everything controlled
by the air conditioning control panel is explained in the two Air conditioning sections (62B and 62C). On the
other hand, signals from other computers are explained in the fault finding sections for these computers (see
conformity check).
A summary of the overall procedure to follow is provided on the following page in the
form of a flow chart.

62C-22
MR-413-X44-62C000$637_eng.mif
V1
62C
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

62C-23
MR-413-X44-62C000$637_eng.mif
V1
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.

62C-24
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 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.

62C-25
MR-413-X44-62C000$637_eng.mif
V1
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

62C-26
MR-413-X44-62C000$637_eng.mif
V1
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.

62C-27
MR-413-X44-62C000$637_eng.mif
V1
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.

62C-28
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.