With vehicle's engine idling and compressor on, check that the gas charge quantity is correct
Go to Step 2
Gas charge not correct
Restore the correct gas charge
2
COOLANT GAS CIRCUIT LEAKAGE CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
With vehicle's engine running, climate control system on and passenger compartment heater fan at max. speed (compressor button ON), position the air adjustment knob/button at max. cold, and check for any leakage.
End of diagnosis
Leakage found in the circuit
Go to Step 3
3
CLIMATE CONTROL SYSTEM O-RING CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
Withdraw the pipes from the compressor and make sure that the O-rings on the pipes are correctly positioned; specifically check whether there has been pinching.
Go to Step 4
O-ring seal failure
Replace the O-rings and refit the pipes on the compressor
4
PIPES/EVAPORATOR/EXPANSION VALVE CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
Check if there is a localised leakage on other components of the cooling system, specifically other pipes of the gas system or the evaporator/expansion valve
Go to Step 5
Leakage detected on the examined components
Restore the seal of the components on which the leakage has been detected and, if necessary, replace them.
5
CONDENSER CONDITION CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
Check that the condenser is clean (mud, foreign bodies...)
End of diagnosis
Presence of dirt or foreign bodies on the condenser