2009 RENAULT SCENIC climate control

62B-43
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
CLIMATE CONTROL
Fault finding – Fault Finding Chart
ALP 1 No dialogue with the computer
NOTESNone.
Try the diagnostic tool on another vehicle.
Check:
–the connection between the diagnostic tool and the diagnostic sensor (wiring in good condition),
–the connection between the vehicle's diagnostic sensor and the diagnostic socket (cable in good condition),
–the injection, engine and passenger compartment fuses.
Check for + 12 V battery on track 16, and + 12 V after ignition feed on track 1 and an earth on track 5 and
on track 4 of the diagnostic socket.
Repair if necessary.
Disconnect the connector from the climate control computer in order to check the insulation, continuity and
the absence of interference resistance of the following connections:
Climate control computer 12-track connector:
Track 11 + before ignition (see the vehicle wiring diagram)
Track 10 + accessories feed (see the vehicle wiring diagram)
Track 6 Earth
Track 7 Track 6 of the diagnostic socket (CAN H)
Track 1 Track 14 of the diagnostic socket (CAN L)
Repair if necessary (see the vehicle wiring diagram).
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B-44
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 2 Air distribution fault
NOTESOnly refer to this customer complaint after a complete check with the diagnostic tool
(no faults should be present or stored, especially fault DF012 Distribution motor circuit).
Special notes:
Adjusting the air distribution or ventilation controls switches off automatic climate
control mode.
Note:
The air distribution motor is located on the RH side of the distribution - ventilation unit,
above the footwell air duct.
Check that the air circuit (cabin filter, scuttle panel grille, air ducts and ventilation grilles, etc.) is not blocked.
Repair, clean or change the cabin filter if necessary.
Also check that there is no air flow fault: see ALP 3 Air flow fault.
Ensure that the blower unit is properly sealed. Also check that the air distribution ducts (right-hand and left-hand,
upper and lower) are correctly connected to the housing as well as the refrigeration pipe in the glove box (if the
customer complains about a feeling of cold air on the passenger's side).
Repair if necessary.
Switch the passenger compartment fan to maximum speed,
the temperature control to maximum hot or maximum cold,
and move the air distribution control.
Check that the air outlet is the one selected.
Note:
For information about the air flows according to user selection,
see the air distribution table shown in the interpretation of
parameter PR011 Distribution flap position.
Has the customer complaint been confirmed?
YES
Remove the distribution motor and check the condition of the
flap control (star-shaped mechanism).
Is the flap control damaged?
NO
NOThe air distribution is operating
correctly.
If necessary, explain how the
system works to the customer
again.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Replace the distribution -
ventilation unit.YES
Edition 2

62B-45
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 2
CONTINUED
With the distribution motor removed, operate the distribution
flaps manually by turning the centre of the control from one limit
to the other (the limits are V shaped).
Does the flap cover the whole range of movement, without
any areas of resistance?
YES
Remove the footwell vent ducts (lower ducts) to check that the
lower flap control linkages are present and correctly fitted (they
are connected to the upper flaps). Also ensure that lower flaps
move when the distribution flap manual control is operated.
Do the footwell (lower) distribution flaps move when the
distribution flaps are controlled?
YES
If the fault is still present with the distribution motor dismantled
and connected, carry out a motor command using the distribution
buttons on the control panel: switch the distribution flap to
demisting position (value 100%) then switch the distribution
setting to air vent position (value 0%).
Is the distribution motor operating?
YES
Remove the dashboard and visually check that when the
distribution flaps are moved manually (by turning the centre of the
control), moving the control does in fact move the distribution
flaps.
Is there movement?
YES
End of fault finding procedure.
NO
NO
NO
NORemove the dashboard to check
that nothing is preventing the
flaps from moving. Repair
(remove any foreign bodies
which may be blocking the flaps
and grease the centre of the flap
control mechanism). Replace
the distribution - ventilation unit if
it is not possible to repair it.
If the mountings of the lower flap
control linkages are not
damaged: resecure the linkages
and grease them slightly. If a
repair is not possible or if the
mountings are damaged:
replace the distribution -
ventilation unit.
Apply the fault finding procedure
for fault DF012 Distribution
motor circuit.
Replace the distribution -
ventilation unit.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B-46
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 3 Air flow fault
NOTESOnly consult this customer complaint after a complete check using the diagnostic
tool.
Check that the customer knows how to work the air conditioning system properly.
Is the passenger compartment fan working?
YES
Check that the air circuit (cabin filter, scuttle panel grille, air ducts and ventilation grilles, etc.) is not blocked.
Ensure that the blower blades are in good condition.
Repair, clean or change the cabin filter if necessary.
With the cabin filter removed, put your
hand into the housing to ensure that the
evaporator is not obstructed and that
there is no ice.
Is the evaporator obstructed?
NO
Ensure that the blower unit is properly sealed. Also check that the air distribution ducts (right-hand and left-hand,
upper and lower) are correctly connected to the housing as well as the refrigeration pipe in the glove box (if the
customer complains about a feeling of cold air on the passenger's side).
Repair if necessary.
Check that the air recirculation flap does not remain closed when in the recirculation position. On the diagnostic
tool, status ET062 "Recirculation flap position" should display OPEN (the flap can be seen by removing the
windscreen frame).
Repair if necessary (apply the fault finding procedure for fault DF021 Recirculation motor circuit).
Does the fault disappear when the air distribution is
changed?
NO
NO
YES
YESRepair, see ALP 5
Remove the evaporator and clean if it is obstructed.
If there is ice on the evaporator, carry out a conformity
check of the temperature sensors (internal, external
and engine coolant temperatures). Depending on
vehicle equipment, check that the interior air
temperature sensor micro-turbine is working correctly
(if it is faulty it may cause the measurement to be
incorrect).
Replace any faulty components.
Ensure that all the air vents
are open.
If the fault is still present,
see ALP 2.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B-47
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 3
CONTINUED
Using the diagnostic tool, check that the climate control panel is controlling the passenger compartment
fan correctly through parameter:
PR019: Passenger compartment fan PWM setpoint (control setpoint).
Note:
The control values are given in the interpretation of this parameter and in the Help section.
If the passenger compartment blower setting values are
correct, check that the air flow varies in line with the 8 control
speeds.
Does the air flow vary?
YES
End of fault finding procedure.
NOCheck that the passenger
compartment fan control is
correct by referring to the fault
finding procedure in the Help
section.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B-48
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 4 Inefficient windscreen demisting
NOTESOnly consult this customer complaint after a complete check using the diagnostic
tool.
Special notes:
Check that the inside of the windows are not greasy, as this lowers the efficiency
of the demister.
Check that the air extraction vents are not blocked.
Repair if necessary.
Is the fault still present?
YES
Ensure that there are no water leaks into the passenger
compartment which would significantly increase the humidity
and reduce the effectiveness of the demisting.
Repair if necessary (see ALP 12).
Is the fault still present?
YES
Check that the compressor is operating correctly by running command: AC008 Compressor command
(Protection and Switching Unit command mode) or by operating the air conditioning (press AC button).
Repair if necessary (see ALP 8 No cold air, in section 62A).
Check that the condensation drain ring (water from the evaporator) is not obstructed (underneath the body).
Repair if necessary.
Is it an air distribution fault?
NO
NO
NO
YESEnd of fault finding procedure.
End of fault finding procedure.
See ALP 2.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B-49
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 4
CONTINUED
Is it an air flow fault?
NO
Is it a heater performance fault?
NO
Check that the air recirculation flap does not remain closed when in the recirculation position. On the diagnostic
tool, status ET062 "Recirculation flap position" should display OPEN (the flap can be seen by removing the
windscreen frame).
Repair if necessary (apply the fault finding procedure for fault DF021 Recirculation motor circuit).
Is the fault still present?
YES
Carry out a conformity check of the temperature sensors
(internal, external and engine coolant temperature).
Depending on vehicle equipment, check that the interior air
temperature sensor micro-turbine is working correctly (if it is
faulty it may cause the measurement to be incorrect).
Replace any faulty components.YES
YESSee ALP 3.
See ALP 6.
NO
End of fault finding procedure.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2

62B-50
CLIMATE CONTROL
Fault finding – Fault Finding Chart62B
V3 MR-372-J84-62B000$110.mif
Vdiag No.: 44
ALP 5 No passenger compartment ventilation
NOTESOnly consult this customer complaint after a complete check using the
diagnostic tool.
Special notes:
The 2 x 5-track intermediate connector is located on the LH side of the distribution /
ventilation unit (behind a plastic cover) and the passenger compartment fan control
module is located slightly higher up, below the heater matrix pipes.
Check that the fusesare in good condition.
Using the diagnostic tool, check that the passenger compartment fan
control setting given by the computer varies from 0 to 100% by checking
parameter PR019 Passenger compartment fan PWM setpoint
(refer to the interpretation of this status).
Does the value vary?
YES
Check that the control voltage (PWM) (modulated control voltage) of the passenger
compartment fan power module varies between 5 and 12 V (from 0 to 100%) by
measuring between track 6 of the module's 6-track connector and earth
(connector connected).
Note:
The check procedure is given in the Help section.
Does the voltage vary correctly?
NO
Check the insulation, continuity and absence of interference resistance on the
following connection:
Air conditioning computer 18-track
connector
track 7
Repair if necessary.Power module 6-track connectortrack 6
With the ignition on, check for +12 V accessories feed on track B1 and an earth on track B5
of the black 2 x 5 track intermediate connector (screwed to the base of the console).
Repair if necessary.
NO
YES Contact your
TECHLINE.
AFTER REPAIRPerform a complete check using the diagnostic tool.
ACREG X84 1.1
Edition 2