HEATING / AIR CONDITIONING REFRIGERANT REPLACEMENT

PROCEDURE

Hide Display 1.RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM

Start the engine.

Operate the compressor under the conditions shown below:

Item	Condition
Operating time	3 minutes or more
Temperature setting	Max cool
Blower speed	High
Engine	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 A/C compressor.

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

Stop the engine.

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.

Hide Display 2.CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT

Perform vacuum purging using a vacuum pump or appropriate equipment.

Charge the air conditioning system with refrigerant.

Refrigerant Type:: HFC-134a (R134a)

3.688,2.042 4.052,2.271 0.365,0.229 10 false *i 1.844,4.198 2.24,4.51 0.396,0.313 10 false : *a 3.063,0.99 3.458,1.25 0.396,0.26 10 false *e 4.167,1.229 4.573,1.51 0.406,0.281 10 false *g 3.167,2.885 3.521,3.135 0.354,0.25 10 false *f 2.406,0.531 2.781,0.802 0.375,0.271 10 false *d 3.448,3.729 3.781,4.01 0.333,0.281 10 false *c 0.906,2.167 1.156,2.417 0.25,0.25 10 false *b 4.719,2.135 5.052,2.385 0.333,0.25 10 false *h

*a	Sub-cool System	*b	High Pressure
*c	Refrigerant Amount	*d	Standard Charge Amount
*e	Charge Additional 100 g (3.53 oz)	*f	Point Where Bubbles Disappear
*g	Mean Value in Proper Range	*h	Overcharged
*i	+/-50 g (+/-1.76 oz)	-	-

Standard Charge Amount:: 400 to 500 g (14.2 to 17.6 oz)

SST: 09985-20010 (09985-02010, 09985-02050, 09985-02060, 09985-02070, 09985-02080, 09985-02090, 09985-02110, 09985-02130, 09985-02140, 09985-02150)

NOTICE:: ·

Make sure that the amount of refrigerant is within 50 g (1.76 oz) of the specified amount.

·

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. This vehicle is not equipped with a sight glass.

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.

Hide Display 3.WARM UP ENGINE

Keep the A/C switch on for at least 2 minutes to warm up the compressor.

NOTICE:: 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).

Hide Display 4.INSPECT FOR REFRIGERANT LEAK

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

Carry out the test under the following conditions:

Turn the ignition switch off.

Ensure good ventilation (the halogen 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)

2.688,1.896 2.688,1.646 false 0.167,0.167 0.479,0.365 0.313,0.198 10 *a 2.635,1.906 2.948,2.104 0.313,0.198 10 *b

*a	Inspect for Leak
*b	Halogen Leak Detector

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

0.844,1.083 1.26,1.083 false 1.083,1.469 1.083,1.802 false 0.677,0.979 0.99,1.177 0.313,0.198 10 false *1 1.021,1.813 1.333,2.01 0.313,0.198 10 false *a

*1	Drain Cooler Hose
*a	Halogen Leak Detector

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

HINT:: ·

After the blower motor has stopped, leave the cooling unit for more than 15 minutes.

·

Bring the halogen leak detector sensor under the drain cooler hose.

·

When bringing the halogen leak detector close to the drain cooler hose, make sure that the halogen 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 halogen leak detector sensor into the unit and check for a leak.

Disconnect the pressure sensor connector and leave it for approximately 20 minutes. Bring the halogen leak detector close to the pressure sensor and check for a leak.

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