Toyota Sequoia (2005). Manual - part 937

AC1JU–07

N13795

Quick Disconnect
Adapter

Charging

Service Valve

Hose

N13794

Vacuum Pump

Vacuum Pump Adapter

N13791

Low Pressure
Service Valve

Vacuum Pump Adapter

High Pressure
Service Valve

Manifold
Gauge
Set

AC–10

–

AIR CONDITIONING

AIR CONDITIONING SYSTEM

3737

EVACUATING

1.

CONNECT QUICK DISCONNECT ADAPTER TO
CHARGING HOSES

2.

REMOVE CAPS FROM SERVICE VALVES ON RE-
FRIGERANT LINES

3.

SET MANIFOLD GAUGE SET

(a)

Close both valves of the manifold gauge set.

(b)

Connect the quick disconnect adapters to the service
valves.

4.

EVACUATE AIR FROM REFRIGERATION SYSTEM

(a)

Connect the vacuum pump adapter to the vacuum pump.

(b)

Connect the center hose of the manifold gauge set to the
vacuum pump adapter.

(c)

Open both the high and low side valves and run the vacu-
um pump.

(d)

After 10 minutes or more, check that the low pressure
gauge indicates 750 mmHg (30 in. Hg) or more.

HINT:
If the reading is 750 mmHg (30 in. Hg) or more, close both
valves of the manifold gauge set and stop the vacuum pump.
Check the system for leaks and repair if necessary.
(e)

Close both the high and low side valves and stop the vac-
uum pump.

(f)

Leave the system in this condition for 5 minutes or more
and check that there is no change in gauge indication.

AC1JV–05

N13793

Charging Cylinder

High Pressure

Service Valve

Low Pressure

Service Valve

Push

Air

N13792

Gas Leak

Detector

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AIR CONDITIONING

AIR CONDITIONING SYSTEM

AC–11

3738

CHARGING

1.

INSTALL CHARGING CYLINDER

HINT:
When handling the charging cylinder, always follow the direc-
tions given in the instruction manual.
(a)

Charge the proper amount of refrigerant into the charging
cylinder.

(b)

Connect the center hose to the charging cylinder.

CAUTION:
Do not open either the high or low side valve of the manifold
gauge set.
(c)

Open the valve of the charging cylinder.

(d)

Press the valve core on the side of the manifold gauge
and expel the air from the center hose.

2.

INSPECT REFRIGERATION SYSTEM FOR LEAKS

(a)

Open the high pressure side valve and charge refrigerant.

(b)

When the low pressure gauge indicates 98 kPa 
(1 kgf/cm

2

, 14 psi), close the high pressure side valve.

(c)

Using a gas leak detector, check the system for leakage.

CAUTION:
Use a refrigerant recovery/recycling machine to recover
the refrigerant whenever replacing parts.

N13790

Low Pressure
Service Valve

High Pressure
Service Valve

I21358

Properly
Charged

Insufficiently
Charged

AC–12

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AIR CONDITIONING

AIR CONDITIONING SYSTEM

3739

3.

CHARGE REFRIGERANT INTO REFRIGERANT SYS-
TEM

If there is no leak after refrigerant leak check, charge the proper
amount of refrigerant into the refrigeration system.
CAUTION:

Never run the engine when charging the system
through the high pressure side.

Do not open the low pressure side valve when the
system is being charged with liquid refrigerant.

(a)

Open the high pressure side valve fully.

(b)

Charge specified amount of refrigerant, then close the
high pressure side valve.

HINT:
The system is fully charged if bubbles cannot be seen through
the sight glass.
(c)

Partially charge the refrigeration system with refrigerant.
(1)

Prepare the vehicle:

Running engine at 1,500 rpm

Single A/C:
Front blower speed control dial at ”HI” posi-
tion

Dual A/C:
Front and rear blower speed set at ”HI” posi-
tion

Single A/C:
Front temperature control dial at ”MAX.
COOL” position

Dual A/C:
Front temperature control dial at ”MAX.
COOL” position
Rear temperature control set at 18.5

°

C

(65

°

F)

Air inlet control set at ”RECIRC”

Fully open doors (Sliding roof: closed)

(2)

Open the low pressure side valve.

CAUTION:
Do not open the high pressure side valve.

(d)

Charge refrigerant until bubbles disappear and check the
pressure on the gauge through the sight glass.

AC1JW–06

I21418

R/B No. 2

 Heater Main Relay

(Marking: HTR)

Compressor

Condenser

Receiver

Pressure Switch

Integration Panel Assembly

 A/C ECU

 A/C Switch

 Air Inlet Selector

Heater Unit

 Heater Radiator

 Air Mix Servomotor

 Air Outlet Servomotor

Cooling Unit

 Blower Motor Linear

Controller

 Evaporator

 Expansion Valve

 Thermistor

Blower Unit

 Blower Motor

 Air Inlet Servomotor

Water Valve

Rear Heater
Control Assembly

Condenser Fan

Ambient
Temperature
Sensor

Solar Sensor

Room
Temperature
Sensor

Rear Room Temperature Sensor

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AIR CONDITIONING

AIR CONDITIONING SYSTEM

AC–13

3740

LOCATION