62C-13
MANUAL AIR CONDITIONING
Fault finding – Fault Finding Chart62C
V2 MR-372-J84-62C000$040.mif
ALP 3 Air flow fault
NOTESNone.
Is the passenger compartment fan working?
YES
Make sure the air circuit (cabin filter, scuttle panel grille, air ducts etc.) is not blocked.
Ensure that the passenger compartment blower is in good condition.
If necessary, repair, clean or replace the cabin filter.
With the cabin filter removed, put your hand into
the housing to ensure that the evaporator is not
being obstructed and that there is no ice.
Is the evaporator obstructed?
NO
Ensure that the passenger compartment fan unit is properly sealed. Also check that the air distribution ducts
(right and left, 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 side).
Repair if necessary.
Check that the air recirculation flap does not remain closed when in the recirculation position.
Repair if necessary.
Does the fault disappear when the air
distribution is changed?
NO
Repair, see ALP 5.
Remove the evaporator and clean
if it is blocked.
If there is ice on the evaporator,
perform a conformity check on the
temperature sensors (exterior and
coolant temperatures).
Replace any faulty components.
Ensure that all the air vents
are open.
If the fault is still present, see ALP 2.
NO
YES
YES
AFTER REPAIRCheck that the system is operating correctly.
62C-19
MANUAL AIR CONDITIONING
Fault finding – Fault Finding Chart62C
V2 MR-372-J84-62C000$040.mif
AFTER REPAIRCheck that the system is operating correctly.
ALP 11 Unpleasant odours in the passenger compartment
NOTESNone.
Check that the cabin filter is not blocked or damaged.
Replace it if necessary.
Is the fault still present?
YES
Check that the condensation evacuation pipe
(water from the evaporator) is not blocked.
Repair if necessary.
Is the fault still present?
YES
Check the sealing of the heating unit in relation to the
engine compartment:
–Foam seal on the heater matrix coolant pipes fitted and
in good condition.
–Rubber seal on the radiator tank fitted and in good
condition (seal under the bonnet separating the engine
compartment from the windscreen aperture).
–Water evacuation valve on the radiator tank fitted and in
good condition.
Repair if necessary.
Is the fault still present?
YES
Remove the cabin filter to apply air conditioning system
cleaner using an extension pipe on the evaporator.
Spray the entire contents of the aerosol.
Leave the product to work for 15 minutes.
End of fault finding
procedure.
End of fault finding
procedure.
End of fault finding
procedure.
NO
NO
NO
62C-20
MANUAL AIR CONDITIONING
Fault finding – Fault Finding Chart62C
V2 MR-372-J84-62C000$040.mif
ALP 12 Water is present in the passenger compartment
NOTESNone.
Pressurise the cooling circuit.
Is there any coolant leaking into the vehicle?
NO
Check that the condensation evacuation pipe
(water from the evaporator) is not blocked.
Repair if necessary.
Is the fault still present?
YES
Ensure that the plenum chamber (under the windscreen aperture) is not filled with water.
If it is, check that the water evacuation valve is fitted to the plenum chamber and is in good condition.
Replace the valve if necessary.
Has the customer just washed the vehicle?
YES
Explain to the customer that when washing the
vehicle using a hose pipe, the water jet must not
be left for too long on the air inlet in the plenum
chamber (on the bonnet).
Repair.
End of fault finding procedure.
End of fault finding procedure.
YES
NO
NO
AFTER REPAIRCheck that the system is operating correctly.
