Toyota Tacoma 2015-2018 Service Manual: Replacement

Toyota Tacoma 2015-2018 Service Manual / Air Conditioning / Refrigerant(for Hfo-1234yf(r1234yf)) / Replacement

REPLACEMENT

PROCEDURE

1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM

(a) Start the engine.

(b) Operate the cooler compressor under the conditions shown below:

Item	Condition
Engine Speed	Idling
Operating Time	3 minutes or more
A/C Switch Status	On
Blower Switch Status	HI
Set Temperature	MAX COOL

This causes most of the compressor oil from the various components of the A/C system to collect in the A/C compressor.

NOTICE:

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

(d) Recover the refrigerant from the A/C system using a refrigerant recovery unit.

NOTICE:

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

HINT:

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

2. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT

HINT:

Charge refrigerant in accordance with the equipment manual.

(a) Perform vacuum purging using a refrigerant recover unit.

NOTICE:

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

(b) Charge refrigerant HFO-1234yf (R1234yf).

Standard:

480 to 540 g (16.93 to 19.05 oz.)

NOTICE:

Make sure the amount of refrigerant is within 30 g of the specified amount.

Text in Illustration

*a	Amount to be charged	*b	Mean value in proper range
*c	Overcharged	*d	Pressure
*e	Sub-cool system	*f	Refrigerant amount

NOTICE:

Do not operate the cooler compressor before charging refrigerant as the cooler compressor will not work properly without any refrigerant, and will overheat.

3. WARM UP ENGINE

(a) Warm up the engine at less than 1640 rpm for 2 minutes or more after charging the refrigerant.

NOTICE:

Be sure to warm up the compressor by turning the A/C switch on after removing and installing the cooler refrigerant lines (including the compressor) to prevent damage to the compressor.

4. INSPECT FOR REFRIGERANT LEAK

(a) After recharging the refrigerant, check for refrigerant gas leakage using a gas leak detector.

HINT:

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

(1) Perform the operation observing the following instructions:

Stop the engine.
Secure good ventilation (the gas leak detector may react to volatile gases other than refrigerant, such as evaporated gasoline or exhaust gas).
Repeat the test 2 or 3 times.
Make sure that some refrigerant remains in the refrigeration system.
HINT:

When the compressor is off: approximately 392 to 588 kPa (4.0 to 6.0 kgf/cm2, 57 to 85 psi).

(2) Using a gas leak detector, check the refrigerant line for leakage.

(3) If a gas leak is not detected from the drain hose, remove the blower motor control (blower resistor) from the cooling unit. Insert the sensor of the gas leak detector into the unit and check for gas leakage.

(4) Disconnect the pressure switch connector and wait for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and check for gas leakage.

Text in Illustration

*1	Gas Leak Detector
*a	Check for Leakage

Precaution

PRECAUTION 1. PRECAUTIONS FOR REFRIGERANT HFO-1234yf (R1234yf) (a) Compatibility (1) The parts used in the refrigerant cycle, the compressor oil, etc. of the HFO-1234yf (R1234yf) system are not c ...

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