Toyota Tundra. Manual — part 2433

8. The A/C system does not function effectively due to an expansion valve malfunction.

Fig. 154: Checking Refrigerant Pressure - Expansion Valve Malfunction
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYMPTOM DIAGNOSIS CHART

9. The A/C system does not function due to a defective compressor.

Fig. 155: Checking Refrigerant Pressure - Defective Compressor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYMPTOM DIAGNOSIS CHART

is too hot to touch

insufficient

charge new
refrigerant

Symptoms

Probable

Cause

Diagnosis

Corrective

Actions



Pressure extremely high
on both low and high-
pressure sides



Frost or condensation on
piping on low-pressure
side

Problem with
expansion
valve



Excessive
refrigerant in low
pressure piping



Expansion valve
open too wide

Replace
expansion
valve

Symptoms

Probable

Cause

Diagnosis

Corrective

Actions



Pressure extremely
high on both low and
high-pressure sides

Internal leakage



Compression failure



Leakage from

Repair or
replace

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

REPLACEMENT

1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM

a. Start up the engine.

b. Turn the A/C switch ON.

c. Operate the cooler compressor with an engine speed of 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 (09985-02010, 09985-02050, 09985-02060, 09985-02070, 09985-02090, 09985-
02110, 09985-02130, 09985-02150)

a. Perform vacuum purging using a vacuum pump.

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

Standard:

600 +/-30g (21.2 +/-1.1 oz.)

Fig. 156: Charge Refrigerant Pressure Graph
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.



Pressure extremely
low on high pressure
side

in compressor

damaged valve or
sliding parts broken

compressor

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

3. WARM UP ENGINE

a. Warm up the engine at less than 1500 RPM for 1 minute or more after charging the refrigerant.

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 the following conditions:



The ignition switch is OFF.



The vehicle is in a place with good air ventilation and without any volatile gases, such as
evaporated gasoline or exhaust gas. The detector is very sensitive to volatile gases.



Some refrigerant is remaining in the refrigerant system.



The compressor is off and its pressure is approximately 392 to 588 kPa (4.0 to 6.0 kgf/cm

2

,

57 to 85 psi).

c. Using a halogen leak detector, check the refrigerant line for leakage.

Fig. 157: Checking Refrigerant Line For Leakage
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d. If a gas leak is not detected on the drain hose, 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.

NOTE:



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



Approximately 200 g (7.05 oz.) of refrigerant may need to be
charged after bubbles disappear. The refrigerant amount should
be checked by measuring its quantity, and not with the sight
glass.

NOTE:

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

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

REFRIGERANT LINE

COMPONENTS

Fig. 158: Identifying Refrigerant Line Components With Torque Specifications (1 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra