61A-28
MR-413-X44-61A000$875_eng.mif
V1
HEATING
Fault finding - Fault finding charts61A
ALP 7
CONTINUED 1
With the engine warm and passenger
compartment ventilation operating, vary
the position of the mixing flap from the
maximum cold position to the maximum
hot position and check subjectively that
there is a difference in temperature.
Is a difference in temperature noted?
YES
NO
For climate control systems:
Carry out a conformity check on the mixing motor (PR012 Mixing flap
position). If the conformity check does not reveal any faults, look for a
mechanical fault on the mixing flap (condition of the motor’s notched
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 the lead if necessary. Unclip the cable from the side of the
heating/air conditioning 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.
YES
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 exterior air position. Status ET062 Recirculation flap position
should display OPEN. If it is closed when the user does not request
recirculation, apply 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 it may have such as kinks, restriction by
plastic clips, etc. Replace it if necessary.
Check that there is no mechanical fault on the recirculation flap (flap
jammed). Carry out any necessary repairs.
Is the fault still present?
NO
End of fault finding
procedure.
Check the coolant circuit:
Check the level of the coolant circuit (too
low a level may unprime the circuit when
driving at low loads and when idling).
Check that the thermostatic valve closes
at the correct temperature, and replace
the valve if necessary (see MR 411,
Mechanical, 19A, Cooling, Thermostat:
Removal - Refitting).
Is the fault still present?
NO
A
B
