A/C Efficiency Test:
WARNING: This page is about a different car, the 2005 BMW 760Li, 2004 BMW 760i, 2004 BMW 760Li, and 2003 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.
Turn on A/C compressor at a vehicle interior temperature of 50° Celsius.
After 2-3 minutes, evaporator sensor temperature must be 10° Celsius.
Draw off A/C system if this temperature is not reached. Measure amount of refrigerant drawn off. Refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) .
If drawn-off quantity does not correspond to specified fill quantity: replenish refrigerant. Refer to HEATING AND AIR CONDITIONING - TECHNICAL DATA
If refrigerant quantity is correct fill A/C system. Refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A)
NOTE:
A/C systems with uncontrolled compressors only: If necessary, then continue troubleshooting by pressure measurement.