Page 3761 of 4323

AC3GX±02
I21360
I03838
SST
I03839
SST
Push
SSTPull
Release
Lever AC±26
± AIR CONDITIONINGCOOLING UNIT
3753 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, refer to the following:
Evacuate air from the refrigeration system.
Charge the system with refrigerant and inspect for leak-
age of refrigerant.
Specified amount:
Single A/C: 750 ± 50 g (26.45 ± 1.76 oz.)
Dual A/C: 1050 ± 50 g (37.03 ± 1.76 oz.)
2. DISCONNECT LIQUID AND SUCTION TUBE
(a) Using SST, remove the 2 piping clamps.
SST 09870±00015 (Suction tube)
09870±00025 (Liquid tube)
(1) Install SST to the piping clamp.
HINT:
Confirm the directions of the piping clamp claw and SST using
the illustration on the caution label.
(2) Push down SST and release the clamp lock.
NOTICE:
Be careful not to deform the tubes, when pushing SST.
(3) Pull SST slightly and push the release lever, then re-
move the piping clamp with SST.
(4) Remove the piping clamp from SST.
(b) Disconnect both tubes.
Page 3762 of 4323
I06919
Disconnect the tube
by hand
Screwdriver
Tube
I06878
Connect Wrong
Gap
I21374
± AIR CONDITIONINGCOOLING UNIT
AC±27
3754 Author: Date:
2005 SEQUOIA (RM1146U)
NOTICE:
Do not use tools like a screwdriver to remove the
tube.
Cap the openings immediately to keep moisture or
dirt out of the system.
HINT:
At the time of reassembly, refer to the following:
Lubricate 4 new O±rings with compressor oil and install
them to the tubes.
After connection, check the claw of the piping clamp is se-
curely engaged.
3. REMOVE CONSOLE UPPER PANEL
4. REMOVE REAR CONSOLE BOX
5. REMOVE FRONT CONSOLE BOX
6. REMOVE GLOVE COMPARTMENT PARTS
7. REMOVE LOWER NO. 2 FINISH PANEL
8. REMOVE LOWER LH FINISH PANEL
9. REMOVE LOWER COVER (See page BO±89)
10. REMOVE NO. 4 HEATER TO REGISTER DUCT
11. REMOVE COOLING UNIT
(a) Disconnect the connectors.
(b) Remove the 3 screws and the bolt, then the cooling unit.
Page 3763 of 4323

AC3GY±02
I21421
I21422
AC±28
± AIR CONDITIONINGCOOLING UNIT
3755 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. REMOVE BLOWER MOTOR LINEAR CONTROLLER
Remove the 2 screws and blower motor linear controller.
2. SEPARATE UPPER AND LOWER UNIT CASES
(a) Disconnect the connector clamp of the thermistor from
the upper unit case.
(b) Using a knife, cut off each packing.
(c) Remove the clip, 6 screws, and grommet.
(d) Separate the upper and lower unit cases, then pull out the
thermistor from the evaporator.
3. REMOVE EVAPORATOR FROM LOWER UNIT CASE
HINT:
At the time of reassembly, refer to the following:
If the evaporator is replaced, add compressor oil to the com-
pressor.
Add 40 to 50 cc (1.4 to 1.7 fl.oz.)
Compressor oil: ND±OIL 8 or equivalent
4. REMOVE EXPANSION VALVE
Using a hexagon wrench (5.0 mm (0.20 in.)), remove the 2 bolts
and separate the expansion valve, evaporator and tubes.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
HINT:
At the time of reassembly, refer to the following item:
Lubricate 4 new O±rings with compressor oil and install them
to the tubes and valve.
Page 3764 of 4323
AC3GZ±02
± AIR CONDITIONINGCOOLING UNIT
AC±29
3756 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. CHECK EVAPORATOR FINS FOR BLOCKAGE
If the fins are clogged, clean them with compressed air.
2. CHECK FOR CRACKS AND SCRATCHES
If necessary, repair or replace damaged parts.
3. INSPECT THERMISTOR RESISTANCE (See page DI±2325)
Page 3765 of 4323
AC3H0±01
AC±30
± AIR CONDITIONINGCOOLING UNIT
3757 Author: Date:
2005 SEQUOIA (RM1146U)
REASSEMBLY
Reassembly is in the reverse order of disassembly (See page AC±28).
Page 3766 of 4323
AC3H1±01
± AIR CONDITIONINGCOOLING UNIT
AC±31
3758 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±26).
Page 3767 of 4323
AC3H2±02
I21423
Non±reusable part Instrument Panel
Reinforcement Defroster Nozzle
Center Heater To Register Duct
Brace No.1
Brace No.2
Heater To
Register Duct
No. 1
Heater Unit
Cooling Unit
Heater Radiator
Foot Air Duct Air Vent DuctHeater Unit Case O±Ring
ClampGrommet
Heater Radiator
PipePacking
Clamp
Clamp
Clamp
Air Outlet Servomotor
Aspirator Hose
Air Mix Servomotor
Heater to
Register
Duct No. 4
Rear Foot Duct
AC±32
± AIR CONDITIONINGHEATER UNIT
3759 Author: Date:
2005 SEQUOIA (RM1146U)
HEATER UNIT
COMPONENTS
Page 3768 of 4323

AC3H3±02
I11129
I11197
Water Hose
Heater Radiator
PipeUpper
LH
RH
45 ± 10°
Lower
Hose Clip
Second RidgeLH
RH
I11130
± AIR CONDITIONINGHEATER UNIT
AC±33
3760 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE COOLING UNIT (See page AC±26)
2. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all the coolant.
3. DISCONNECT WATER VALVE CONTROL CABLE
FROM WATER VALVE (See page AC±79)
4. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a) Using pliers, grip the claws of the clips and slide the clips
along the hose.
(b) Disconnect the water hoses.
(c) Remove the grommet.
HINT:
At the time of installation, refer to the following:
Push the water hose onto the heater radiator pipe up to
the second ridge on the pipe.
Install the hose clip to the position shown in the illustra-
tion.
5. REMOVE INSTRUMENT PANEL AND REINFORCE-
MENT (See page BO±89)
6. REMOVE DEFROSTER NOZZLE AND HEATER TO
REGISTER DUCT
7. REMOVE HEATER UNIT
Remove the 3 screws and heater unit.