BMW X5 Owners & Service Manuals

BMW X5: Air Conditioner Test (R 134A)

Before A/C efficiency test, satisfy following conditions:

1. Provide a MoDiC or DIS. Safeguard electrical system integrity by checking the fault memory (no faults in the fault memory).

2. Provide a thermometer with separate gauge.

3. Perform the test in a suitable work bay with an ambient temperature between 20 ºC and 30 ºC.

Re 1:

Connect MoDiC or DIS to car and display evaporator temperature.

Re 2:

Position a thermometer with a separate gauge approx. 5 cm below the roof liner at the height of the B-pillar.

Lay gauge outwards out of vehicle interior.

Re 3:

Heating up vehicle interior:

A/C efficiency test:

Turn on A/C compressor at a vehicle interior temperature of 50 ºC.

After 3-4 minutes, the evaporator sensor temperature must be > or = 15 ºC.

Draw off A/C system if this temperature is not reached. Measure amount of refrigerant drawn off.

If drawn-off quantity does not correspond to specified fill quantity : supplement refrigerant and repeat test.

If fill quantity is correct, continue troubleshooting by pressure measurement.


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