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

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61A
HEATING
Fault finding - Conformity check
SUB-FUNCTION: HEATING
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Test conditions: engine stopped, ignition on.
ComputerParameter or Status
checked or ActionDisplay and
notesFault 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.
Note: This status only operates for
manual air conditioning and
heating versions.
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 circuit).
PR002: Exterior
temperature
(depending on
equipment)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 ˚CIn the event of a fault, see 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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HEATING
Fault finding - Conformity check61A
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.
ComputerParameter or Status
checked or ActionDisplay and
notesFault 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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HEATING
Fault finding - Conformity check61A
SUB-FUNCTION: USER SELECTION
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Test conditions: engine stopped, ignition on.
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.
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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HEATING
Fault finding - Conformity check61A
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 at idle speed, vehicle speed zero.
ComputerParameter or Status
checked or ActionDisplay and Notes Fault finding
UCH (continued)
(see 87B,
Passenger
compartment
connection unit)ET239: Ignition switch
position+ after ignition feedIn the event of a fault, refer to the
interpretation of this status.
PR025: Engine speed800 rpm ± 50 rpmIn the event of a fault, see the
interpretation of this parameter.
PR024: Engine coolant
temperatureX = engine coolant
temperatureIn the event of a fault, see the
interpretation of this parameter.
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.
PR001: Battery voltage12.5 V < X < 14.4 VIn the event of a fault, see 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 circuit).
PR002: Exterior
temperature
(depending on
equipment)X = exterior temperature:
5 ˚C (invalid value:
215 ˚C)In the event of a fault, see the
interpretation of this parameter.

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HEATING
Fault finding - Conformity check61A
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 at idle speed, vehicle speed zero.
ComputerParameter or Status
checked or ActionDisplay and
notesFault finding
Injection
(see 13B, Diesel
injection or 17B,
Petrol injection)PR064: Coolant
temperatureX = engine coolant
temperatureIn the event of a fault, see the
interpretation of this parameter.
ET111: RCH number
setYES or NO
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: RCH cut-offYES or NO
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.

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HEATING
Fault finding - Conformity check61A
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 at idle speed, vehicle speed zero.
ComputerParameter or Status
checked or ActionDisplay and
notesFault 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.
ET015:Passenger
compartment
blowerACTIVE
(according to test conditions:
see Notes).In the event of a fault, refer to the
interpretation of this status.

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61A
HEATING
Fault finding - Fault finding charts
ALP 6 No heating or inadequate heating
NOTESCarry out these checks after a full check using the diagnostic tool (fault reading and
configuration checks).
Check that the fuses are sound.
Use a multimeter, current clamp and 21 W test light.
Use the Wiring Diagrams Technical Note, NEW TWINGO.
Is the air flow correct?
YES
Is the air distribution correct?
YES
With a warm engine, set the heating to max.
Is the blown air hot?
NO
Using the parameter and statuses screen on the
diagnostic tool (Heating and UCH or Climate
Control sub-functions: 62B), check that the
temperature signals are consistent (no sensor
deviation resulting in incorrect measurement).
For manual air conditioning systems:
–Use parameters PR002 Exterior temperature
(depending on option) and PR024 Engine
coolant temperature.
For climate control systems:
–Use parameters PR002 Exterior
temperature, PR004 Coolant temperature
and PR001 Interior temperature.
Are the temperature signals consistent?
YES
NOSee ALP3 Air flow fault, air flow fault.
NOSee ALP2 Air distribution fault, air
distribution fault.
YESIf necessary, explain how the system works to
the customer again.
Carry out a conformity check:
–For the coolant temperature sensor,
see 13B, Diesel injection, Fault
summary table or 17B Petrol injection,
Fault summary table.
–For the exterior temperature sensor,
see 87B, Passenger compartment
connection unit, Fault summary table.
–For the interior temperature sensor,
see 62B, Climate control, Fault summary
table.
Replace any faulty components.
NO
A
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HEATING
Fault finding - Fault finding charts61A
ALP 6
CONTINUED 1
With the engine warm and
passenger compartment
ventilation operating, vary the
position of the mixing flap from
the maximum cold position to
the maximum hot position and
check subjectively that there is a
dif ference in temperature.
Is a difference in temperature
noted?
YES
NO
For climate control systems:
Carry out a conformity check on the mixing motor (PR012
Mixing flap position). If the conformity check does not reveal
any faults, look for a mechanical fault on the mixing flap
(condition of the motor ’s notched sector, flap jammed inside the unit, etc.).
For manual air conditioning and heater versions:
Check the condition and routing of the mixing flap control cable.
Eliminate any constraints it may have such as kinks, restriction by plastic
clips, etc.
Replace the lead if necessary. Unclip the cable from the side of the heating/
air conditioning unit and check the stiffness of movement of each
component: control button and flap control on the air distribution unit. Check
that there is no mechanical fault with the mixing flap (flap jammed inside the
unit, etc.).
Carry out any necessary repairs.
Is the fault still present?
YES NO
Is the lower heater matrix pipe (coolant inlet) hot?
Note: Pipe located on the left-hand side of the
heater-air conditioning unit, near the engine bulkhead.
YES NO
End of fault finding
procedure.
Check that the heater matrix is not blocked: the top
heater matrix outlet pipe should be hot. Clean the
heater matrix or replace it if necessary (see MR 411,
Mechanical, 61A, Heating, Heater matrix: Removal
- Refitting).
Is the fault still present?
NO
Check the coolant circuit:
Check the level of the coolant circuit (too low a level
may unprime the circuit when driving at low loads and
when idling).
Check that the thermostatic valve opens at the
correct temperature, and replace the valve if
necessary (see MR 411, Mechanical, 19A, cooling,
thermostat:
Removal - Refitting).
End of fault finding
procedure.
A
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HEATING
Fault finding - Fault finding charts61A
ALP 6
CONTINUED 3
Note:
Fault finding procedure performed using a current clamp.
With the passenger compartment fan activated, fit a current clamp to the connection of earth between the battery
and chassis earth point, and use the CLIP tool to run command AC251 Heating resistor relay 2.
Does the current measured increase by at least 40 A when the command is run?
YES NO
With the passenger
compartment heating
resistors operating, carry
out a conformity check on
the injection, heating sub-
function (see 13B, Diesel
injection, Conformity
check).
Disconnect the passenger compartment heating resistor connector
(component 1113) and connect a test light between each of the connections
38LM and MAK and run command AC251 Heating resistor relay 2.
Does the test light illuminate?
NO YES
Replace the passenger compartment
heating resistor unit (component 1113)
(see MR 411, Mechanical, 61A, Heating,
Heating resistors: Removal - Refitting).Check the continuity of the 2 connections 38LM between
components 1113 and 1068.
Is the continuity correct?
NO YES
Continuity fault on
connection 38LM. If there
is a repair method
(see Technical Note
6015A, Repairing
electrical wiring, Wiring:
Precautions for repair),
repair or replace the
wiring.Re-run command AC251 Heating resistor relay 2. Check for + 12 V supply
on connections 3FB and BP9 of component 1068.
Are the supplies correct?
YES NO
Check the engine fuse
and relay box (see 16A,
Starting Charging).Run fault finding on the injection computer
for the heating element resistor 2 command
(see 13B, Diesel injection, Conformity
check).
C

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HEATING
Fault finding - Fault finding charts61A
ALP 6
CONTINUED 4
Note:
Fault finding procedure performed using a current clamp.
Check the continuity on connection 38LL
between components 1113 and 1067.
Is the continuity correct?
YES
Re-run command AC250 Heating resistor
relay 1. Check for + 12 V between the chassis
earth and connections 3FB and BP9 of
component 1067.
Is there + 12 V?
YES
Run fault finding on the injection computer for
the heating element resistor 1 command
(see 13B, Diesel injection, Conformity check).
NOContinuity fault on connection 38LL. If there is
a repair procedure (see Technical Note
6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring or
replace it
.
NOCheck the engine fuse and relay box
(see 16A, Starting Charging).
D