CITROEN C4 2004 Handbook page 400

CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Setting the checking tool [1] to measurement mode.
Operate the checking tool, press on button "j".
Select the type of aircon fluid: R134.a or R12:
- Press on button "l", validate by pressing on button "k".
Select the type of aircon fluid: with filtering and drying cartridge, or calibrated aperture:
- Press on button "l", validate by pressing on button "k".
Select the temperature setting T3,
- Press on button "l", validate by pressing on button "j".
NOTE: The tool is in measurement mode.
Aircon compressor with fixed capacity:
- Take the measurement with the engine running, at idle.
Aircon compressor with variable capacity:
- Take the measurement with the engine running, at 1500 rpm.
Setting the checking tool to diagnostic mode.
Set the checking tool to diagnostic mode, press on button "j".
The diagnosis is performed instantaneously: values outside the tolerances are displayed on a dark
background.
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