2010 RENAULT SCENIC engine

62A - 38
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: heating (continued 3)
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
UCH
(continued 2)AC016:RCH no. 1 relay. Commands for testing the
operation of the RCH
(passenger compartment
air heating resistors). The
number of RCH stages
switched on depends on the
number of relays actuated.
NOTE: RCH no. 3 relay is
only fitted to Mégane
Scénics.If there is a fault, refer to the
fault finding procedure
for these controls.
NOTE: To find the relays
actuated/number of RCH
engaged correlation, refer
to the "general operation"
section of the UCH
Technical Note. AC017:RCH no. 2 relay.
AC018:RCH no. 3 relay.
(Mégane Scénics
only)
InjectionET024:Set number of
RCH.YES or NO
NOTE: According to the
injection's requirements:
power requirement, torque
reduction, etc., the injection
computer sets the number
of RCH stages switched on
(no more, no less).If there is a fault, refer to the
fault finding procedure
for this status.
PR064:Coolant
temperature.X = engine coolant
temperature.If there is a fault, refer to the
fault finding procedure
for this parameter.
Protection and
Switching UnitPR002:alternator charge
signal0 < X <100 %
–0 % = zero electrical
consumption.
–100 % = maximum
electrical consumption.If there is a fault, refer to the
fault finding procedure
for this parameter.
AC011:Heated rear
screen.Command for testing the
operation of the rear screen
heating.If there is a fault, consult the
fault finding procedure
for this command.
NOTE: The UPC cannot
test the heated rear screen
control circuit; this
command is the only way to
test its operation.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 39
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: user selection
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine at idle speed,
AIR CONDITIONING OPERATING (air
conditioning compressor engaged).
NOTE: The interpretation of the statuses, parameters and controls listed in this check
is explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Climate controlET086:Heated rear
screen: manual
mode.ACTIVE: De-icing button at
the bottom of the control
panel pressed.
INACTIVE otherwise.If there is a fault, refer to the
fault finding procedure
for this status.
ET085:Heated rear
screen: auto
mode.ACTIVE: De-icing button at
the top of the control panel
pressed ("See clear"
function).
INACTIVE otherwise.If there is a fault, refer to the
fault finding procedure
for this status.
ET143:Air conditioning
request 1.ACTIVE
NOTE: This status is only
valid for climate control
systems.If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the climate control
computer to the UCH to
engage the compressor
(refer to the flowchart in
the general operation
section).
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

62A - 41
AIR CONDITIONING
Fault finding - Conformity check62A
V4
Manual air conditioning
and
Climate control
Subsystem: passenger compartment ventilation
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine at idle speed,
AIR CONDITIONING OPERATING (air
conditioning compressor engaged).
NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant). Fault finding
procedures for the statuses, parameters and commands listed in this check are
explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer
(signal generator)Parameter or status
checked or actionDisplay and Notes Fault finding
Climate controlPR019:Passenger
compartment
blower
PWM setpoint.from 18 % to 100 %.
(18 % corresponds to
speed 1)
NOTE: The "PWM" signal is
a modulated control voltage
used to control the
passenger compartment
blower power module.If there is a fault or for more
information (to find the
intermediate speed
percentages), refer to the
fault finding procedure
for this parameter.
PR012:Mixing flap
position.0 % = Max. cold position (15
˚C)
100 % = Max. warm
position (27 ˚C)If there is a fault, refer to the
fault finding procedure
for this parameter.
ET062:Recirculation flap
position.OPEN if the flap is in the
outside air position.
CLOSED if the flap is in the
recirculation position.If there is a fault, refer to the
fault finding procedure
for this status.
PR011:Distribution flap
position.from 0 % to 100 %.
NOTE:
0 % = Full air vents position
100 % = De-icing positionIf there is a fault or for more
information (various flap
opening values according
to the user selection), refer
to the fault finding
procedure for this
parameter.
CLIM X84 1.1
Edition 2
MR-372-J84-62A000$060.mif

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-45V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate controlAIR CONDITIONING
Fault finding - Fault Finding Chart
ALP 6 No heating or inadequate heating
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool (fault
reading and configuration checks).
Is the air flow correct?
YES
Is the air distribution correct?
YES
With the engine warm, select the MAX heat position.
Is the blown air hot?
NO
Using the diagnostic tool statuses and parameters
screen (cold loop sub-function), check that the
temperature signals are correct (no sensor drift
resulting in incorrect measurement).
For manual air conditioning systems:
–External air temperature and engine coolant
temperature.
For climate control systems:
–External air temperature, engine coolant
temperature and internal air temperature.
Depending on the vehicle equipment, also check that
the internal air temperature sensor mini-turbine is
operating correctly (this can distort the measurement if
it is faulty).
Are the temperature signals consistent?
YES
NO
NO
YES
NOSee ALP 3, air flow fault.
See ALP 2, air distribution fault.
If necessary, explain how the
system works to the customer
again.
Carry out a conformity check on
the sensors (refer to the relevant
section).
Replace any faulty components.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-46V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 6
CONTINUED
With the engine warm and
passenger compartment ventilation
operating, vary the position of the
mixing flap from the very cold
position to the very hot position and
check subjectively that there is a
difference in temperature.
Can you feel the difference in
temperature?
YES
NOFor climate control systems:
Carry out a conformity check on the mixing motor
(PR012 Mixing motor). If the conformity check does not
reveal any faults, look for a mechanical fault with the
mixing flap (condition of the motor's toothed 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 on it: kinks,
cable restricted by plastic clips, etc. Replace it if
necessary. Unclip the cable from the side of the 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
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
Check that the heater matrix is not blocked: The top heater matrix pipe should be hot.
NOTE: Pipe located on the left-hand side of the heater-air conditioning unit, near the engine
bulkhead. Clean the heater matrix or replace it if necessary.
Is the fault still present?
YES NO
If the vehicle is fitted with passenger compartment heating
resistors (RCH), check that these are operating correctly by
referring to the fault finding procedure in the UCH Technical Note.
NOCarry out a check on the coolant circuit and
ensure that the thermostatic valve opens at the
correct temperature.
Replace the valve if necessary.
NO
End of fault finding procedure.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-47V4 MR-372-J84-62A000$080.mif
ALP 7 Too much hot air
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool (fault
reading and configuration checks).
Is the air flow correct?
YES
Is the air distribution correct?
YES
Using the diagnostic tool statuses and parameters screen (cold loop sub-
function), check that the temperature signals are correct (no sensor drift
resulting in incorrect measurement).
For manual air conditioning:
External air temperature and engine
coolant temperature.
For regulated climate control systems:
External air temperature,
engine coolant temperature and internal air temperature.
Depending on the vehicle equipment, also check that the internal air
temperature sensor mini-turbine is operating correctly (this can distort the
measurement if it is faulty).
Are the temperature signals consistent?
YES
With the engine warm and
passenger compartment ventilation
operating, vary the position of the
mixing flap from the maximum hot
position to the maximum cold
position and check subjectively that
there is a difference in temperature.
Can you feel the difference in
temperature?
YESCarry out a
conformity check on
the sensors (refer to
the relevant section).
Replace any faulty
components.
For climate control systems:
Carry out a conformity check on the mixing motor (PR012
Mixing motor). If the conformity check does not reveal any
faults, look for a mechanical fault with the mixing flap
(condition of the motor's toothed sector, flap jammed inside the
unit, etc.).
For manual air conditioning systems:
Check the condition and routing of the mixing flap control
cable. Eliminate any constraints on it: kinks, cable restricted by
plastic clips, etc. Replace it if necessary. Unclip the cable from
the side of the 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.
Manual air conditioning
and
Climate control
NO
NO
NO
NOSee ALP 3, air flow fault.
See ALP 2, air distribution fault.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

62A-48
AIR CONDITIONING
Fault finding - Fault Finding Chart62A
V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 7
CONTINUED
For climate control systems:
Using the diagnostic tool statuses and parameters screen (passenger compartment ventilation sub-function),
check that the recirculation flap is in the external air position: status ET062 Recirculation flap position should
display OPEN. If it is closed when the user does not want recirculation, use the fault finding procedure for fault:
DF021 Recirculation motor circuit.
For manual air conditioning systems:
check that the recirculation flap is in the external air position. If this is not operating correctly (impossible to change
the flap to the exterior air position), check the condition and routing of the recirculation flap control cable. Eliminate
any constraints on it: kinks, cable restricted by plastic clips, etc.
Replace it if necessary.
Check that there is no mechanical fault with the recirculation flap (flap jammed).
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.NOCarry out a check on the
coolant circuit and ensure
that thermostatic valve
opens at the correct
temperature.
Replace the valve if
necessary.
YES
If the vehicle is fitted with passenger compartment heating resistors,
check that these are operating correctly (not switching on
unnecessarily) by referring to the fault finding procedure contained in
the UCH technical note.
End of fault finding procedure.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-49V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 8 No cold air
NOTESOnly carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Using the diagnostic tool statuses and parameters screen (cold loop sub-
function), check that the temperature signals are consistent (no sensor drift
resulting in incorrect measurement).
For manual air conditioning:
External air temperature and engine
coolant temperature.
For regulated climate control systems:
External air temperature,
engine coolant temperature and internal air temperature. Depending on
the vehicle equipment, also check that the internal air temperature sensor
mini-turbine is operating correctly (this can distort the measurement if it is
faulty).
Are the temperature signals consistent?
YES
Start the engine and switch on the air conditioning by pressing the AC
button (with a request for maximum cold temperature and the passenger
compartment fan running).
View the following statuses on the user selection sub-function screen:
–For
climate control systems:
Status ET143 AIR CONDITIONING REQUEST 1 should display ACTIVE
and the symbol AC should be displayed on the air conditioning control panel
screen.
–For
manual air conditioning systems:
Status ET029 AIR CONDITIONING BUTTON should display PRESSED.
NOTE: these statuses show the request from the air conditioning control
panel to the UCH to start the air conditioning.
Are the correct statuses displayed?
YES
NOCarry out a
conformity check
on the sensors.
Replace any faulty
components.
NOContact your
Techline.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2