Replacement [08/2023 - ]: Procedure

1. except Gasoline Model:
   1. Turn the ignition switch ON (READY).
2. for Gasoline Model:
   1. Start the engine.
3. Operate the compressor under the following conditions:

   Item	Condition
   Operating time	3 minutes or more
   Temperature setting	Max cold
   Blower speed	High
   Ignition switch (except Gasoline Model)	On (READY)
   Engine (for Gasoline Model)	Idling
   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.

   HINT: 

   It is not necessary to operate the compressor if the A/C does not operate because of compressor lock, etc.

4. except Gasoline Model:
   1. Turn the ignition switch off.
5. for Gasoline Model:
   1. Stop the engine.
6. Recover the refrigerant from the A/C system using a refrigerant recovery unit.

   HINT: 

   Use the refrigerant recovery unit in accordance with the manufacturer's instruction manual.

1. When the compressor operates normally:
   1. Enter Refrigerant Recovery Mode.

      Refer to UTILITY [08/2023 - ]

   2. After turning the ignition switch off, wait for 3 minutes to allow the electric expansion valve to return to its original position.

      HINT: 

      Waiting for 3 minutes after turning the ignition switch off allows time for the electric expansion valve to return to its original position which enables the refrigerant to be recovered more easily.

   3. Connect a refrigerant recovery unit to the vehicle.

      HINT: 

      Use the refrigerant recovery unit in accordance with the manufacturer's instruction manual.

2. When the compressor is locked:
   1. Turn the ignition switch off.
   2. Wait for 3 minutes to allow the electric expansion valve to return to its original position.

      HINT: 

      Waiting for 3 minutes after turning the ignition switch off allows time for the electric expansion valve to return to its original position which enables the refrigerant to be recovered more easily.

   3. Connect a refrigerant recovery unit to the vehicle.

      HINT: 

      Use the refrigerant recovery unit in accordance with the manufacturer's instruction manual.

   4. After the refrigerant recovery unit stops operating, leave the vehicle for 1 hour and check that the refrigerant pressure has not increased above 150 kPa (1.5 kgf/cm₂ , 22 psi).
      WARNING:

      If an air conditioning system line is disconnected when the pressure has increased, refrigerant may spray out and cause an injury. Therefore, make sure to recover the refrigerant until the pressure does not increase.

      NOTE:

      If the pressure increased, operate the refrigerant recovery unit again to recover the refrigerant until the pressure does not increase.

HINT: 

Charge the system with refrigerant in accordance with the manufacturer's instruction manual.

1. Perform vacuum purging using a vacuum pump or appropriate equipment.
   NOTE:

   Be sure to use a refrigerant recovery unit that is compatible with HFO-1234yf (R1234yf) systems.

2. Charge the air conditioning system with refrigerant.

   Refrigerant Type

   HFO-1234yf (R1234yf)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *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)	-	-

   Standard Charge Amount

   for PHEV Model	1470 to 1530 g (51.9 to 53.9 oz)
   for HEV Model	570 to 630 g (20.11 to 22.2 oz)
   for 1Motor-HEV Model	540 to 600 g (19.1 to 21.1 oz)
   for Gasoline Model	620 to 680 g (21.9 to 23.9 oz)

   NOTE:

   • Do not turn the A/C switch on before charging the air conditioning system with refrigerant. Doing so may cause the compressor to operate 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.

   HINT: 

   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.

3. for PHEV Model:
   1. If the air conditioning system cannot be charged with the specified amount of refrigerant, perform the following procedure:
      1. Charge the air conditioning system with refrigerant until it cannot be added.
      2. Enter Refrigerant Filling Mode.

         Refer to UTILITY [08/2023 - ]

      3. Charge the air conditioning system with refrigerant until it reaches the specified amount.
      4. After adding refrigerant, immediately turn the ignition switch off to exit Refrigerant Filling Mode.

1. Keep the A/C switch on, set the temperature to MAX COOL and wait for at least 2 minutes to warm up the compressor.
   NOTE:

   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).

1. Warm up the compressor under the following conditions.
   NOTE:

   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).

   Item	Condition
   Operating time	2 minute or more
   Temperature setting	Max cold
   Blower speed	High
   Engine speed	2000 rpm or less
   A/C switch	On

1. After recharging the air conditioning system with refrigerant, inspect for refrigerant leaks using a gas leak detector.

   HINT: 

   Be sure to use a gas leak detector that is compatible with HFO-1234yf (R1234yf) systems.

2. Carry out the test under the following conditions:
   • Turn the ignition 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)

3. Using a gas leak detector, inspect for refrigerant leaks from the air conditioning system.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Inspect for leak
   *b	Gas Leak Detector

4. Bring the gas leak detector close to the drain cooler hose with the detector power off, and then turn the detector on.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Drain Cooler Hose
   *a	Gas Leak Detector

   HINT: 

   • 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.
5. 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.
6. 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.

   HINT: 

   When checking for leaks, the presence of oily dirt at a joint can indicate a leak.