PROCEDURE
REMOVE RADIATOR COVER PLATE
Remove the 7 clips.
Detach the claw and guide and remove the radiator cover plate.
REMOVE UPPER RADIATOR SUPPORT SEAL
Remove the 7 clips.
Detach the claw and guide and remove the upper radiator support seal.
REMOVE LOWER RADIATOR AIR DEFLECTOR
Remove the 7 clips.
Detach the guide and remove the lower radiator air deflector.
RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM
Turn the power switch on (READY).
Operate the cooler compressor under the conditions shown below:
Item | Condition |
---|---|
Operating Time | 3 minutes or more |
Temperature setting | Max cool |
Blower speed | High |
Power switch | On (READY) |
A/C switch | On |
This causes most of the compressor oil from the various components of the A/C system to collect in the compressor.
It is not necessary to operate the compressor if the A/C does not operate because of compressor lock, etc.
Turn the power switch off.
Recover the refrigerant from the A/C system using a refrigerant recovery unit.
Use the refrigerant recovery unit in accordance with the manufacturer's instruction manual.
CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT
Charge refrigerant in accordance with the equipment manual.
Perform vacuum purging using a vacuum pump or appropriate equipment.
Be sure to use a refrigerant recovery unit that is compatible with HFO-1234yf (R1234yf) systems.
*a | Standard Charge Amount | *b | Mean Value in Proper Range |
*c | Overcharged | *d | High Pressure |
*e | Sub-cool System | *f | Refrigerant Amount |
*g | +/-30 g (+/-1.05 oz) | - | - |
Charge the air conditioning system with refrigerant.
Refrigerant Type |
---|
HFO-1234yf (R1234yf) |
Standard Charge Amount |
---|
570 to 630 g (20.1 to 22.2 oz) |
Do not turn the A/C switch on before charging the air conditioning system with refrigerant. Doing so may cause the compressor to work without refrigerant, resulting in overheating of the compressor.
The refrigerant amount should be checked by quantity (weight).
The graph above is shown for reference only.
Ensure that sufficient refrigerant is available to recharge the system when using a refrigerant recovery unit. Refrigerant recovery units are not always able to recover 100% of the refrigerant from an air conditioning system.
WARM UP COMPRESSOR
Keep the A/C switch on for at least 2 minutes to warm up the compressor.
To prevent damage to the compressor, be sure to warm up the compressor when turning the air conditioning on after removing and installing any air conditioning system lines (including the compressor).
Perform warm up for the compressor with the engine idling.
INSPECT FOR REFRIGERANT LEAK
After recharging the air conditioning system with refrigerant, inspect for refrigerant leaks using a gas leak detector.
Be sure to use a gas leak detector that is compatible with HFO-1234yf (R1234yf) systems.
Carry out the test under the following conditions:
Turn the power switch off.
Ensure good ventilation (the gas leak detector may react to volatile gases which are not refrigerant, such as gasoline vapor and exhaust gas).
Repeat the inspection 2 or 3 times.
Measure the pressure to make sure that there is some refrigerant remaining in the air conditioning system.
Pressure when the compressor is off: approximately 392 to 588 kPa (3.9 to 5.9 kgf/cm2, 57 to 85 psi)
*a | Inspect for leak |
*b | Gas Leak Detector |
Using a gas leak detector, inspect for refrigerant leaks from the air conditioning system.
*1 | Drain Cooler Hose |
*a | Gas Leak Detector |
Bring the gas leak detector close to the drain cooler hose with the detector power off, and then turn the detector on.
After the blower motor has stopped, leave the cooling unit for more than 15 minutes.
Bring the gas leak detector sensor under the drain cooler hose.
When bringing the gas leak detector close to the drain cooler hose, make sure that the gas leak detector does not react to volatile gases. If it is not possible to avoid interference from volatile gases, the vehicle should be lifted up to allow checking for leaks.
If a refrigerant leak is not detected from the drain cooler hose, remove the blower motor control from the cooling unit. Insert the gas leak detector sensor into the unit and check for leaks.
Disconnect the pressure sensor connector and leave it for approximately 20 minutes. Bring the gas leak detector close to the pressure sensor and check for leaks.
When checking for leaks, the presence of oily dirt at a joint can indicate a leak.
INSTALL LOWER RADIATOR AIR DEFLECTOR
Attach the guide to install the lower radiator air deflector.
Install the 7 clips.
INSTALL UPPER RADIATOR SUPPORT SEAL
Attach the claw and guide to install the upper radiator support seal.
Install the 7 clips.
INSTALL RADIATOR COVER PLATE
Attach the claw and guide to install the radiator cover prate.
Install the 7 clips.