RENAULT SCENIC 2010 J95 / 3.G Air Conditioning Repair Manual

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-51V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 8
CONTINUED 2
Carry out fault finding on the injection system to ensure that no fault is present (if faults are displayed by the
injection computer, engagement of the air conditioning may be inhibited).
If there are present or stored faults: carry out the necessary repairs (see the injection Technical Note).
Check that the refrigerant fluid pressure is correct (neither too low nor too high) using parameter PR037
REFRIGERANT FLUID PRESSURE: see the conformity check in this note (cold loop sub-function).
Check that the engine cooling fan assembly is at speed 1
by viewing the following statuses on the cold loop sub-
function screen:
–Status ET014 FAN ASSEMBLY 1 CHECK should display
RUNNING.
–status ET022 LOW SPEED FAN ASSEMBLY REQUEST
should display ACTIVE.
NOTE: These statuses are not displayed by all types of
injection system (see the cold loop sub-function conformity
check).
Is the engine fan running at speed 1?
YES
NOCarry out fault finding on the
injection (which calls for the fan
units to be switched on) and the
Switching Protection Unit (which
controls the fan units).
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-52V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 8
CONTINUED 3
Check the condition of the air conditioning compressor
belt and its tension.
Is the tension correct?
YES
With the engine stopped, use the diagnostic tool to run
command AC008 COMPRESSOR CONTROL (Protection
and Switching Unit command mode menu).
Does the compressor clutch jam?
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?
YES
NOReplace the belt
(refer to repair methods).
NOUse the fault finding procedure for
command AC008 COMPRESSOR
CONTROL found in the Protection
and Switching Unit Technical Note.
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 systems:
Check the condition and routing of the mixing flap
control cable. Eliminate any stresses 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 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-53V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 8
CONTINUED 4
Check that the condenser is clean (presence of leaves, mud, etc.).
Clean the condenser if necessary.
Check the cold loop by checking the condition of the pipes and checking that the air conditioning system is not
leaking refrigerant (carry out the check with the engine cold and then hot, using the electronic buzzer or a leak
detecting product to avoid filling the air conditioning system twice in succession).
Repair if necessary.
With the air conditioning operating (maximum cold
requested), check that the refrigerant pipe between the
sized port and the evaporator is very cold to the touch
(lower evaporator inlet pipe at the engine compartment
bulkhead).
Is the refrigerant pipe cold?
YES
Top up the refrigerant, referring to the Repair Manual (550 g ± 25 g).
Is the fault still present?
YES NO
Replace the air conditioning compressor.End of fault finding procedure.
NOCheck the presence of the
calibrated jet.
YES Is the sized port present?
NO
Replace the pipe (between the
condenser outlet and the
evaporator inlet).
Replace the calibrated jet.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-54V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 9 Too much cold air
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool (fault
reading and configuration checks).
With the engine running at idle speed and air conditioning switched off ("AC" button not
pressed and no "AUTO" mode), check that the air conditioning compressor clutch is not
engaged.
Is the air conditioning compressor clutch engaged?
YES
With the engine stopped, use the diagnostic tool to run command AC008
COMPRESSOR CONTROL (Protection and Switching Unit command mode menu) to
check the correct operation of the compressor clutch electrical control.
During the command, track A of the compressor clutch must be supplied with + 12 volts.
If the + 12 volts feed is still present after the command has terminated: refer to the
interpretation of this command (check the continuity and insulation against + 12 volts
of the electrical connection between the UPC and the compressor clutch).
If there are no faults on the compressor command line but the clutch remains engaged:
check that the air conditioning compressor clutch is not seized (mechanical fault).
Replace the air conditioning compressor if necessary.
Is the fault still present?
YES
NO
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-55V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 9
CONTINUED
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 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
Check the refrigerant fluid
level.
NO
NOCarry 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.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-56V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 10 Inefficient rear screen de-icing or demisting
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool (fault
readings, especially those of the Protection and Switching Unit, and configuration
checks).
Special notes:
–Check that the inside of the glass is not greasy as this lowers the de-icing efficiency.
N.B.: for electric power drain reasons, de-icing can only be activated when the
engine is running.
Rear screen de-icing can be activated in two ways:
–Pressing the de-icing button (at the bottom of the control panel) switches on the
heated rear screen in manual mode (with timer) and heated door mirrors.
–Pressing the de-icing button at the top of the control panel activates the "See clear"
function: heated rear screen in automatic mode (no timer) heated door mirrors, air
conditioning and high speed windscreen ventilation all switched on.
Check that there are no water leaks into the passenger compartment
which would significantly increase the humidity levels and reduce the
effectiveness of demisting. Repair if necessary (see ALP 12).
Is the fault still present?
YES
Check for earth on the right-hand side terminal of the heated rear screen.
Repair if necessary.
Use the diagnostic tool to run command AC011 Heated
rear screen (Protection and Switching Unit command
mode menu).
Is the 12 V feed present on the left-hand connector
of the heated rear screen?
NO
NO
YESEnd of fault finding
procedure.
If the 12 V feed and earth both arrive
correctly at the heated rear screen
terminals but the screen still does not
operate correctly: unclip the plastic
rear screen pillars and check that the
de-icing lines are not broken. The
resistance of the lines should be
neither zero nor infinity (average
0.5 Ω). Repair if necessary.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

AIR CONDITIONING
Fault finding - Fault Finding Chart62A
62A-57V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 10
CONTINUED 1
Use the fault finding procedure for command AC011
HEATED REAR SCREEN found in the Protection and
Switching Unit Technical Note.
Is the fault still present?
YES
Using the tables below, check the control panel button(s).
NOTE: With climate control systems, press the de-icing button at the top of the control panel for auto de-icing ("See
clear" function), and press the de-icing button at the bottom of the control panel for manual de-icing.
CLIMATE CONTROL
ENGINE STOPPED ENGINE RUNNING
No button
pressedAuto de-icing
pressedManual de-
icing pressedNo button
pressedAuto de-icing
pressedManual de-
icing pressed
ET085 Heated rear
screen: automatic modeINACTIVEACTIVEINACTIVE INACTIVEACTIVEINACTIVE
ET086 Heated rear
screen: manual modeINACTIVE INACTIVEACTIVEINACTIVE INACTIVEACTIVE
ET026 Heated rear
screen controlINACTIVE INACTIVE INACTIVE INACTIVEACTIVE ACTIVE
MANUAL AIR CONDITIONING
(and heater version without air
conditioning)
ENGINE STOPPED ENGINE RUNNING
No button
pressedDe-icing
pressedNo button
pressedDe-icing
pressed
ET026 Heated rear screen control INACTIVE INACTIVE INACTIVEACTIVE
ET028 Heated rear screen button RELEASED DEPRESSED RELEASED DEPRESSED
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-58V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 10
CONTINUED 2
Do the statuses operate as shown?
NO
For climate control systems:
Carry out fault finding on the multiplex system, UCH and Switching Protection Unit (requests to switch on the
heated rear screen are sent via the multiplex system).
For manual air conditioning systems:
Refer to the interpretation of status ET028 Heated rear screen button and carry out fault finding on the UCH (the
request to switch on the heated rear screen is sent via a wire connection).
End of fault finding procedure.
YES End of fault finding procedure.
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

62A-59
AIR CONDITIONING
Fault finding - Fault Finding Chart62A
V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 14 Air conditioning noises during operation
NOTESOnly deal with this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
Check that the computers involved in the air conditioning function (Injection, Protection and
Switching Unit, UCH and Air conditioning control panel) are correctly configured.
Reconfigure if necessary (see Configurations and Configuration readings).
Check that:
–the compressor fitted to the vehicle corresponds correctly to the engine (see MR 370 Mechanical, 62A, Air
conditioning, Air conditioning: Parts and consumables for the repair).
Replace the compressor if necessary (see MR 370, Mechanical, 62A, Air conditioning, Compressor: Removal
- Refitting).
–the compressor is correctly fixed (see MR 370 Mechanical, 62A, Air conditioning, Compressor: Removal -
Refitting).
Check the condition of the compressor belt and check its tension. Replace the belt if necessary (see MR 370
Mechanical, 11A, Top and front of engine, Accessories belt: Removal - Refitting).
Check that the intermediate pipes, condenser and dehydrator reservoir are correctly fitted.
–Check the mountings and brackets of the components.
–Check the contact between and proximity of the components.
(see MR 370 Mechanical, 62A, Air conditioning, Air conditioning: List and location of components).
Check the correct operation of the cooling fan assembly or passenger compartment fan assembly and
condenser:
–check the electrical supply of the fan using parameters ET007 High speed fan assembly control, AC009 Low
speed fan assembly and AC010 High speed fan assembly (see Conformity check, Sub-function: Cold
loop).
Check the quantity of refrigerant (see MR 370 Mechanical, 62A, Air conditioning, Air conditioning: Parts and
consumables for the repair).
If the quantity of refrigerant is:
- Greater than the manufacturer's information, recharge according to the manufacturer's values (see MR 370
Mechanical, 62A, Air conditioning: Draining - Filling).
- Less than the manufacturer's information, check for leaks (see MR 370 Mechanical, 62A, Air conditioning,
Refrigerant circuit: Check).
If the fault is still present, replace the compressor (see MR 370, Mechanical, 62A, Air conditioning,
Compressor: Removal - Refitting).
AFTER REPAIRPerform a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 2

62A-60
AIR CONDITIONING
Fault finding - Fault Finding Chart62A
V4 MR-372-J84-62A000$080.mif
Manual air conditioning
and
Climate control
ALP 15 Passenger compartment ventilation noises
NOTESOnly deal with this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
The aim of the following operations is to check and, if necessary, eliminate any foreign bodies (leaves,
insects, other, etc.) in:
–the passenger compartment air inlet,
–the cabin filter housing,
–the housing and on the fan assembly.
Check the passenger compartment air inlet and the cabin filter housing:
Remove:
–the scuttle panel grille (see MR 371 Bodywork, 55A, Exterior equipment, Scuttle panel grille: Removal -
Refitting),
–the air filter access panel,
–the scuttle panel partition,
–the cabin filter.
Check that there are no foreign bodies (leaves, insects, other, etc.) and, if necessary, clean the passenger
compartment air inlet and the cabin filter housing.
Refit:
–the cabin filter,
–the scuttle panel partition,
–the air filter access panel,
the scuttle panel grille (see MR 371 Bodywork, 55A, Exterior equipment, Scuttle panel grille: Removal -
Refitting).
Check the housing and the fan assembly:
Remove the fan assembly (see MR 370 Mechanical, 61A, Heating, Fan assembly: Removal - Refitting).
Check that there are no foreign bodies (leaves, insects, other, etc.) and, if necessary, clean the fan assembly
housing.
Check that there are no foreign bodies (leaves, insects, other, etc.) and, if necessary, clean the fan assembly.
Refit the fan assembly (see MR 370 Mechanical, 61A, Heating, Fan assembly: Removal - Refitting).
AFTER REPAIRCarry out a complete check using the diagnostic tool.
CLIM X84 1.1
Edition 3