sensor RENAULT SCENIC 2009 J84 / 2.G Air Conditioning Manual Conditioning Workshop Manual

62C - 6
MANUAL AIR CONDITIONING
62C
V2 MR-372-J84-62C000$020.mif
MANUAL AIR CONDITIONING
Fault finding – System operation and track allocation
System operation
The manual heating and ventilation system does not have a computer. It consists solely of a control panel from which
the compressor (controlled by the Protection and Switching Unit and injection), the passenger compartment heating
resistors (controlled by the UCH with permission from the Protection and Switching Unit and injection) and rear de-
icer (managed by the Protection and Switching Unit) are started as explained in the synopsis of heating and
ventilation system operation in Section 62A.
The panel, by means of cables, also controls the air distribution flaps, air distribution and recycling, as well as fan
assembly speed through a connecting wire and resistor unit.
Manual heating and ventilation system control panel track allocation
Control panel
track Allocation Sensor or actuator track
A1 Earth
A2 Passenger compartment ventilation control
speed 1Resistor unit connector A track 1
A3 Passenger compartment ventilation control
speed 2Resistor unit connector A track 2
A4 Passenger compartment ventilation control
speed 3Resistor unit connector A track 3
A5 Passenger compartment ventilation control
speed 4Resistor unit connector A track 4
A6 Not used
B1 Passenger compartment ventilation speed 0
signal UCH
B2 + 12 V side lights Protection and Switching Unit
B3 Rear screen de-icer operation request UCH
B4 Rear screen de-icing control indicator light UCH
B5 Earth
B6 Air conditioning control indicator light UCH
B7 Air conditioning operation request UCH
B8 +12 V accessories Fuse and Relay box
B9 Not used

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.