Pinpoint Test A: Leak Tests
- A1: LEAK TEST 1 CHARGE PORTS NOTE:
- Do not test for leaks by charging the system with refrigerant and oil. Nitrogen must be used for leak detection.
- Borescopes and endoscopes can also be used to confirm leak points.
- This test is performed with the engine not running.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Make sure that there is no debris in the air conditioning charging ports
- Charge the air conditioning system with nitrogen and regulate to 7.0 bar
- Isolate the nitrogen supplyNOTE:
- Any decay in pressure indicates a leak.
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Monitor the pressure gauge and check for leaks for 30 minutes.
Can a leak be identified with the leak detector or escaping gas heard?
Yes: Inspect the air conditioning charge ports for leaks. Disconnect and re-connect the charging station from the charging ports recharge the air conditioning system and make sure there are no leaks evident from the charging ports GO to A2.
No: Reconfirm the customer issue
- A2: LEAK TEST 2 COMPRESSOR SEALS NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the air conditioning compressor inlet and outlet pipe seals for leaks. Inspect for leaking oil or dye from the joints.
Can a leak be identified as coming from the air conditioning compressor inlet or outlet pipe seals?
Yes: Install new air conditioning compressor inlet and outlet pipe seals, recharge the air conditioning system with nitrogen and recheck the system for leaks
No: GO to A3.
- A3: LEAK TEST 3 PIPE WORK NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the air conditioning system pipe work for leaks, check flexible pipes for cracks and/or splits. Inspect pipe flanges and joints for damage or poor connections. Inspect for leaking oil or dye from the joints.
Can a leak be identified as coming from the air conditioning pipe work including any pipe flanges or joints?
Yes: Replace worn or damaged pipe work as necessary, recharge the air conditioning system with nitrogen and recheck the system for leaks
No: GO to A4.
- A4: LEAK TEST 4 CONDENSOR NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the air conditioning system condensor for damage or corrosion. Check the pipe connections and seals for leaks. Inspect for leaking oil or dye from the pipe connections or core of the condensor.
Can a leak be identified as coming from the air conditioning condensor or pipe connections to the condensor?
Yes: If a leak is evident from the pipe seals to the condensor replace the seals as necessary, recharge the air conditioning system with nitrogen a recheck the system for leaks. If the leak is due to damage or corrosion to the air conditioning condensor, replace the condensor as necessary, recharge the air conditioning system with nitrogen and recheck the system for leaks
No: GO to A5.
- A5: LEAK TEST 5 RECEIVER DRIER NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the air conditioning system receiver drier for damage or corrosion. Check the pipe connections for leaks. Inspect for leaking oil or dye from the pipe connections.
Can a leak be identified as coming from the air conditioning receiver drier or pipe connections to the receiver drier?
Yes: If a leak is evident from the pipe seals to the receiver drier replace the seals as necessary, recharge the air conditioning system with nitrogen a recheck the system for leaks. If the leak is due to damage or corrosion to the air conditioning receiver drier, replace the receiver drier as necessary, recharge the air conditioning system with nitrogen and recheck the system for leaks
No: GO to A6.
- A6: LEAK TEST 6 REFRIGERANT PRESSURE SENSOR NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the refrigerant pressure sensor for damage or a leaking seal. Inspect for leaking oil or dye from the refrigerant pressure sensor.
Can a leak be identified as coming from the air conditioning refrigerant pressure sensor or seal?
Yes: If a leak is evident from the refrigerant pressure sensor or seals, replace the sensor and seals as necessary, recharge the air conditioning system with nitrogen and recheck the system for leaks
No: If an internal heat exchanger is installed to the vehicle GO to A7.
If an internal heat exchanger is NOT installed to the vehicle GO to A8.
- A7: LEAK TEST 7 INTERNAL HEAT EXCHANGER (IF INSTALLED) NOTE:
- The internal heat exchanger is incorporated primarily because of the introduction of refrigerant HFO1234yf (which is less efficient than refrigerant R134a), but is included in all systems for commonality reasons.
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the internal heat exchanger for damage or leaks. Inspect for leaking oil or dye from the internal heat exchanger.
Can a leak be identified as coming from the air conditioning internal heat exchanger?
Yes: If a leak is evident from the internal heat exchanger, replace the internal heat exchanger as necessary, recharge the air conditioning system with nitrogen and recheck the system for leaks
No: GO to A8.
- A8: LEAK TEST 8 THERMOSTATIC EXPANSION VALVE NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the thermostatic expansion valve for damage, leaking pipe connections and seals. Inspect for leaking oil or dye from the thermostatic expansion valve.
Can a leak be identified as coming from the thermostatic expansion valve, connections or seals?
Yes: If a leak is evident from the thermostatic expansion valve, connections or seals, install a new thermostatic expansion valve and seals as necessary. Recharge the air conditioning system with nitrogen and recheck the system for leaks
No: GO to A9.
- A9: LEAK TEST 9 AIR CONDITIONING COMPRESSOR NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the air conditioning compressor for damage. Check the compressor shaft seal, electronic control valve and compressor casting for leaks. Inspect for leaking oil or dye from the compressor.
Can a leak be identified as coming from the air conditioning compressor?
Yes: If a leak is evident from the air conditioning compressor, install a new air conditioning compressor as necessary. GO to PINPOINT TEST G .
No: GO to A10.
- A10: LEAK TEST 10 EVAPORATOR NOTE:
- Leak sources may be identified by using a Jaguar Land Rover approved leak detector, by using an ultra-violet lamp (if dye is in the system) or by listening for the sound of escaping gas.
- Make sure the system is depressurized before disconnecting any system pipe work or connections.
NOTE: For detailed information of the component indicated in the image Refer to: Climate Control- Inspect the evaporator for damage, leaking pipe connections and seals. Inspect for leaking oil or dye from the evaporator.
Can a leak be identified as coming from the evaporator, connections or seals?
Yes: If a leak is evident from the evaporator, connections or seals, install a new evaporator and seals as necessary. Recharge the air conditioning system with nitrogen and recheck the system for leaks
No: Reconfirm the customer issue