Page 3745 of 4323

AC1JU±07
N13795
Quick Disconnect
Adapter
Charging
Service ValveHose
N13794
Vacuum Pump
Vacuum Pump Adapter
N13791
Low Pressure
Service Valve
Vacuum Pump Adapter High Pressure
Service ValveManifold
Gauge
Set
AC±10
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
3737 Author: Date:
2005 SEQUOIA (RM1146U)
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.
Page 3746 of 4323

AC1JV±05
N13793
Charging Cylinder High Pressure
Service Valve Low Pressure
Service ValvePush
Air
N13792
Gas Leak
Detector
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±11
3738 Author: Date:
2005 SEQUOIA (RM1146U)
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.
Page 3747 of 4323

N13790
Low Pressure
Service Valve
High Pressure
Service Valve
I21358
Properly
Charged
Insufficiently
Charged AC±12
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
3739 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºHIº posi-
tion
Dual A/C:
Front and rear blower speed set at ºHIº posi-
tion
Single A/C:
Front temperature control dial at ºMAX.
COOLº position
Dual A/C:
Front temperature control dial at ºMAX.
COOLº position
Rear temperature control set at 18.5°C
(65°F)
Air inlet control set at ºRECIRCº
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.
Page 3748 of 4323
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
ThermistorBlower 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
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±13
3740 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION
Page 3749 of 4323
I21419
Water Valve
Air Outlet
Servomotor
Heater Radiator
Thermistor
Evaporator
Expansion Valve Power Transistor Blower Motor
AC±14
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
3741 Author: Date:
2005 SEQUOIA (RM1146U)
Page 3750 of 4323
CH0086
Correct Wrong
AC1JX±05
B00808
A
B
± AIR CONDITIONINGDRIVE BELT
AC±15
3742 Author: Date:
2005 SEQUOIA (RM1146U)
DRIVE BELT
ON±VEHICLE INSPECTION
1. INSPECT DRIVE BELT'S INSTALLATION CONDITION
Check that the drive belt fits properly in the ribbed grooves.
2. INSPECT DRIVE BELT TENSION
Check that the tension is within the A range on the auto tension-
er scale.
If the tension is not within the A range on the scale, replace the
belt with a new one.
HINT:
When replacing the drive belt with a new one, the belt's tension
should be within the B range on the belt tensioner scale.
Page 3751 of 4323
AC1JY±05
EM6656
AC±16
± AIR CONDITIONINGDRIVE BELT
3743 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
REMOVE DRIVE BELT
Loosen the drive belt tension by turning the drive belt tensioner
counterclockwise, and remove the drive belt.
Page 3752 of 4323
EM6656
AC3GT±02
± AIR CONDITIONINGDRIVE BELT
AC±17
3744 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
INSTALL DRIVE BELT
Turn the drive belt tensioner counterclockwise then install the
drive belt.