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Home >> Jaguar >> 2015 >> XFR-S >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Climate Control System - General Information -- XF/X250) >> Climate Control System - General Information >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test E: Low And High Pressure System Pressures Too High Tests

Pinpoint Test E: Low And High Pressure System Pressures Too High Tests

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  1. E1: LOW AND HIGH PRESSURE SYSTEM PRESSURES TOO HIGH TEST 1 
    1. Start the engine
    2. Set the air conditioning to on
    3. Check the operation of the electric cooling fan

      Is the electric cooling fan operating?

      • Yes  : GO to  E2.
      • No  : Check for foreign objects jamming the electric cooling fan. Refer to the applicable SYSTEM WIRING DIAGRAMs and check the electric cooling fan circuit for short circuit to ground, short circuit to power, open circuit, high resistance
  2. E2: LOW AND HIGH PRESSURE SYSTEM PRESSURES TOO HIGH TEST 2 
    1. Stop the engine
    2. Check the air conditioning condensor for external obstructions

      Are any external obstructions present?

      • Yes  : Repair as necessary
      • No  : GO to  E3.
  3. E3: LOW AND HIGH PRESSURE SYSTEM PRESSURES TOO HIGH TEST 3 
    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  : GO to  E4.
  4. E4: LOW AND HIGH PRESSURE SYSTEM PRESSURES TOO HIGH TEST 4 
    1. Stop the engine
    2. Using the manufacturer approved equipment, recover the refrigerant
    3. Compare the weight of recovered refrigerant to that specified for the vehicle

      Was the weight of the recovered refrigerant greater than specified for the air conditioning system?

      • Yes  : Using the manufacturer approved equipment, evacuate and recharge the air conditioning system with the correct quantity of refrigerant and oil
      • No  : Thermostatic expansion valve internal failure. Install a new thermostatic expansion valve
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