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Pinpoint Test C: Gauge Tests

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
  1. Record the pressure values
    1. Record the pressure values

      2. Did the gauges register a change in pressure when the air conditioning was switched on? 

      YES:  GO to C 2.

      NO:  Using the manufacturer approved diagnostic system, check the Automatic Temperature Control Module (ATCM) for related DTCs and refer to the relevant DTC index

  2. C2: GAUGE TEST 2 
    1. Record the pressure values

      2. Are the pressure gauge readings fluctuating? 

      YES:  Moisture present in the air conditioning system. Recover the refrigerant. Install a new receiver drier. Refer to the relevant section of the service information and evacuate and recharge the air conditioning system. GO to Pinpoint Test B .

      NO:  GO to C 3.

  3. C3: GAUGE TEST 3 
    1. Record the pressure values

      2. Are the pressure gauge readings too low? 

      YES:  GO to C 4.

      NO:  GO to C 6.

  4. C4: GAUGE TEST 4 
    1. Using the manufacturer approved refrigerant leak detector, check for a refrigerant leak

      2. Was a refrigerant leak detected? 

      YES:  Refer to the relevant section of the service information and recover the refrigerant. Repair as necessary. Evacuate and recharge the air conditioning system. GO to Pinpoint Test B .

      NO:  GO to C 5.

  5. C5: GAUGE TEST 5 
    1. Refer to the relevant section of the service information and recover the refrigerant

      2. Was the weight of the recovered refrigerant less than specified for the air conditioning system? 

      YES:  Refer to the relevant section of the service information and evacuate and recharge the air conditioning system. GO to Pinpoint Test B .

      NO:  Install a new receiver drier. Refer to the relevant section of the service information and evacuate and recharge the air conditioning system. GO to Pinpoint Test B .

  6. C6: GAUGE TEST 6 
    NOTE: This test is performed with the engine running and the air conditioning set to on.
    1. Record the pressure values

      2. Are the pressure gauge readings too high? 

      YES:  GO to C 7.

      NO:  Test inconclusive. GO to Pinpoint Test B .

  7. C7: GAUGE TEST 7 
    1. Refer to the relevant section of the service information and recover the refrigerant

      2. Was the weight of the recovered refrigerant more than specified for the air conditioning system? 

      YES:  Refer to the relevant section of the service information and evacuate and recharge the air conditioning system. GO to Pinpoint Test B .

      NO:  Install a new thermal expansion valve. Refer to the relevant section of the service information and evacuate and recharge the air conditioning system. GO to Pinpoint Test B .

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