TOYOTA SEQUOIA 2001 Service Repair Manual

AC3H6±01
AC±36
± AIR CONDITIONINGHEATER UNIT
3763 Author: Date:
2005 SEQUOIA (RM1146U)
REASSEMBLY
Reassembly is in the reverse order of disassembly (See page AC±34).

AC3H7±01
± AIR CONDITIONINGHEATER UNIT
AC±37
3764 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±33).

AC3H8±02
I21376
Rear Cooler
Duct Rear Heater Duct
Plate
Rear A/C Unit
Upper Back Door Garnish
Quarter
Pillar
Garnish RH
Rear Seat
Outer Belt
Rear Window
Side Garnish RH
Water Hose
Wire Harness
Suction Tube
Rear Seat
Outer Belt
Rear Quarter Trim
Panel RHBack Door
Scuff Plate
Rear Door Scuff Plate RH
Liquid Tube

O±Ring
N´m (kgf´cm, in´lbf):Specified torque
Non±reusable part
5.4 (55, 48)
AC±38
± AIR CONDITIONINGREAR A/C UNIT
3765 Author: Date:
2005 SEQUOIA (RM1146U)
REAR A/C UNIT
COMPONENTS

I21394
Wire HarnessSliding Door
Air Outlet ServomotorPlate
Water Valve
Hose Clip
Water Hose
Bracket
Packing Heater RadiatorWater Hose
Blower MotorBlower CaseShaftClamp
Bracket
A/C Unite Case RH
O±Ring
Hose Clip
Power Transistor
Evaporator

O±Ring
Evaporator CoverThermistor
Plate
Tube and Accessory

O±Ring
Expansion Valve
Clamp

O±RingLiquid Tube
Bracket
Bracket
N´m (kgf´cm, ft´lbf):Specified torque

Non±reusable part
InsulatorDrain Hose
A/C Unite Case LH
5.4 (55, 48 in.´lbf)
Packing
22 (235, 16)
13 (135, 10)
± AIR CONDITIONINGREAR A/C UNIT
AC±39
3766 Author: Date:
2005 SEQUOIA (RM1146U)

AC3H9±02
I21380
I21381
AC±40
± AIR CONDITIONINGREAR A/C UNIT
3767 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, refer to the following item:

Evacuate air from the refrigeration system.

Charge the system with refrigerant and inspect for leak-
age of refrigerant.
Specified amount:
Dual A/C: 1050 ± 50 g (37.03 ± 1.76 oz.)
2. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all coolant.
3. REMOVE REAR SEAT OUTER BELT FLOOR AN-
CHORS
4. REMOVE BACK DOOR SCUFF PLATE
5. REMOVE REAR DOOR SCUFF PLATE RH
6. REMOVE UPPER BACK DOOR GARNISH
7. REMOVE REAR WINDOW SIDE GARNISH RH
8. REMOVE REAR QUARTER TRIM PANEL RH
9. REMOVE QUARTER PILLAR GARNISH RH
10. DISCONNECT LIQUID AND SUCTION TUBES
Remove the 2 bolts and disconnect both tubes.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
NOTICE:
Cap the openings immediately to keep moisture or dirt out
of the system.
HINT:
At the time of installation, refer to the following:
Lubricate 2 new O±rings with compressor oil and install them
to the tubes.
11. DISCONNECT WATER HOSES FROM HEATER PIPES
(a) Grip the claws of the hose clip and slide the hose clip
along the hose.
(b) Disconnect the water hoses.

I21382
Water
Hose
View AFRRH
LHRR View A
Marking Heater
Radiator Pipe
Second Ridge
Hose Clip
45°
I21383
I21384
± AIR CONDITIONINGREAR A/C UNIT
AC±41
3768 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:
At the time of installation, please refer to the following items.

Push the water hose onto the heater radiator pipe up to
the second ridge on the pipe.

Install a hose clip to the position shown in the illustration.
12. REMOVE REAR A/C UNIT
(a) Remove the 3 clips and cover.
(b) Remove the 2 air ducts.
(c) Disconnect the connectors and wire harness clamps.
(d) Remove the 3 bolts and rear A/C unit.

AC3HA±02
I21386
I21385
I21393
I21389
AC±42
± AIR CONDITIONINGREAR A/C UNIT
3769 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. REMOVE BLOWER MOTOR
2. REMOVE POWER TRANSISTOR
3. REMOVE THERMISTOR
4. REMOVE WATER VALVE
(a) Remove the packing.
(b) Remove the 3 screws and 2 brackets.
(c) Grip the claws of the hose clips and slide the hose clips
along the hoses.
(d) Disconnect the water hoses and pipes.
(e) Remove the 2 screws and 2 clamps.
(f) Remove the 3 screws and water valve.
5. REMOVE DRAIN HOSE
6. REMOVE EXPANSION VALVE
(a) Remove the 4 screws and 2 brackets.
(b) Pry out the packing.
HINT:
At the time of installation, refer to the following:
Do not refuse the packing.
(c) Using a hexagon wrench (5.0mm (0.20 in.)), remove the
2 bolts and expansion valve.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)

I21387
Nut A:
Nut B:
I21392
I21391
± AIR CONDITIONINGREAR A/C UNIT
AC±43
3770 Author: Date:
2005 SEQUOIA (RM1146U)
NOTICE:
Cap the openings immediately to keep moisture or dirt out
of the system.
HINT:
At the time of installation, refer to the following:
Lubricate 2 new O±rings with compressor oil and install them
to the tube and valve.
(d) Remove the holder and disconnect the heat sensing
tube.
(e) Loosen the 2 nuts and remove the expansion valve.
Torque:
Nut A: 13 N´m (135 kgf´cm, 10 ft´lbf)
Nut B: 22 N´m (235 kgf´cm, 16 ft´lbf)
HINT:
At the time of installation, refer to the following:
Lubricate 2 new O±rings with compressor oil and install them
to the expansion valve.
7. REMOVE EVAPORATOR
(a) Remove the 8 screws and cover.
(b) Pull out the evaporator.
8. REMOVE AIR OUTLET SERVOMOTOR
(a) Using a screwdriver, release the claw and remove the
plate.
HINT:
Tape the screwdriver tip before use.
(b) Remove the 3 screws and servomotor.

I21390
X10 AC±44
± AIR CONDITIONINGREAR A/C UNIT
3771 Author: Date:
2005 SEQUOIA (RM1146U)
9. SEPARATE REAR A/C UNIT
(a) Remove the 2 screws, clamp and blower case.
(b) Remove the 10 screws and separate the A/C unit.
(c) Remove the sliding door and shaft.
(d) Remove the heater radiator and insulator.

AC3HB±02
I22634
FACE 1
FACE 2
B/L 1
B/L 2
FOOT
1
2 3 4 5
7
8
± AIR CONDITIONINGREAR A/C UNIT
AC±45
3772 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT EVAPORATOR
(a) Check evaporator fins for blockage.
If the fins are clogged, clean them with compressed air.
NOTICE:
Never use water to clean the evaporator.
(b) Check fitting for cracks or scratches.
If necessary, repair or replace.
2. INSPECT HEATER RADIATOR
Inspect fins for blockage.
If the fins are clogged, clean them with compressed air.
3. INSPECT WATER VALVE SERVOMOTOR CIRCUIT
(See page DI±2361)
4. INSPECT AIR OUTLET SERVOMOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
7 and the negative (±) lead to terminal 8.
(b) Connect the negative (±) lead from the battery to each ter-
minal and check that the shaft rotates at each position, as
shown in the illustration.
Connected terminalPosition
1FOOT
2B/L 2
3B/L 1
4FACE 2
5FACE 1