Renault Laguna III Manual page 2560

AIR CONDITIONING 01 or AIR CONDITIONING 02
II - VEHICLE PREPARATION OPERATION
a Put the vehicle in the shade, where the temperature
is greater than or equal to 15˚C minimum.
a Close the bonnet.
a Open the front windows.
a Start the engine and let it idle.
a Set the air conditioning controls with:
- recirculation mode in the external position,
- the ventilation distribution in "face" mode,
- the temperature control to coldest temperature set-
ting in front (and at the back, if it exists),
- the speed of the passenger compartment fan as-
sembly set to maximum (switch off the rear control
if it exists),
- the front side and centre air vents open with the
vanes in a neutral position,
- the air conditioning system must be turned on (indi-
cator light illuminated).
a Wait 5 minutes with the engine idling before tak-
ing any measurements.
III - MEASUREMENTS
a Record the air temperature at the scuttle panel grille
(T3).
- open the bonnet, depending on the vehicle, to ac-
cess the scuttle panel grille.
- place the sensor where air is drawn through the
scuttle panel grille.
AIR CONDITIONING
Air conditioning: Check
119359
- wait for the value to become stable.
- record the T3 temperature value.
- close the bonnet if it was opened.
a Record the air temperature at the left air vent (T1),
and at the right air vent (T2).
- fit sensor T1 in the left air vent (1) .
- fit sensor T2 in the right air vent (2) .
a Record the differences in temperature once the (∆T)
value has stabilised:
- between T3 and the higher of values T1 or T2, (T3
- highest value).
- record this difference in temperature.
- between T1 and T2 (read the (∆T) value (T1-T2)
display mode).
- record the difference in temperature (∆T) accord-
ing to the correction (∆) to be applied to the mea-
surement.
a If the (∆T)=(T1-T2) measurement is unstable, follow
the procedure below:
Note:
Depending on the vehicle's air conditioning sys-
tem programming, this check method may not be
applicable because the engine cooling fan
assembly has been activated. Its operation ren-
ders the (∆Τ) value between T1 and T2 unstable.
To eliminate this error, the fan assembly must be
activated for the entire period over which temper-
ature T1 and T2 measurements are recorded.
62A-4
62A
119357