Pinpoint Test D: Low And High Pressure System Pressures Unstable Tests

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Jaguar XFR, 2015 Jaguar XF, 2014 Jaguar XFR, 2014 Jaguar XF, and 2013 Jaguar XFR. However, it is still accessible from the selected car via links, so may be relevant.

D1: LOW AND HIGH PRESSURE SYSTEM PRESSURES UNSTABLE TEST 1
1. Start the engine
2. Set the air conditioning to on
3. Check the pressure gauge readings
4. Set the air conditioning to off
5. Check the pressure gauge readings
  Do the pressure gauge readings equalise immediately when the air conditioning is set to off?
  - Yes : Air conditioning compressor internal failure. Install a new air conditioning compressor
  - No : Air or moisture present in the air conditioning system. Using the manufacturer approved equipment, recover the refrigerant. Install a new receiver drier. Evacuate and recharge the air conditioning system with the correct quantity of refrigerant and oil