Toyota 4Runner: Replacement

Toyota 4Runner Service Manual / Vehicle Interior / Heating / Air Conditioning / Refrigerant / Replacement

REPLACEMENT

PROCEDURE

1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM

(a) Start the engine.

(b) Turn the A/C switch on.

(c) Operate the cooler compressor while the engine speed is approximately 1000 rpm for 5 to 6 minutes to circulate the refrigerant and collect the compressor oil remaining in each component into the cooler compressor.

(d) Stop the engine.

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

2. CHARGE REFRIGERANT

SST: 09985-20010

09985-02130

09985-02150

09985-02090

09985-02110

09985-02010

09985-02050

09985-02060

09985-02070

(a) Perform vacuum purging using a vacuum pump.

(b) Charge refrigerant HFC-134a (R134a).

Standard:

550 +/-30 g (19.3 +/-1.0 oz.)

NOTICE:

Do not operate the cooler compressor before charging refrigerant as the cooler compressor does not work properly without any refrigerant and overheats.
Approximately 100 g (3.53 oz.) of refrigerant may need to be charged after bubbles disappear.

3. WARM UP ENGINE

(a) Warm up the engine at less than 1850 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. CHECK FOR REFRIGERANT GAS LEAK

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

(b) Perform the operation under these conditions:

Stop the engine.
Secure good ventilation (the halogen 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. When the compressor is off: approximately 392 to 588 kPa (4.0 to 6.0 kgf/cm2, 57 to 85 psi).

Text in Illustration

*1	Halogen Leak Detector
*a	Check for Leakage

(d) If a gas leak from the drain hose is not detected, remove the blower motor control (blower resistor) from the cooling unit. Insert the halogen leak detector sensor into the unit and perform the test.

(e) Disconnect the connector and wait for approximately 20 minutes. Bring the halogen leak detector close to the pressure switch and perform the test.

On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET (a) This method uses a manifold gauge set to locate problem areas. Read the manifold gauge pressure when th ...

Refrigerant Line

Components COMPONENTS ILLUSTRATION ...

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