Toyota Sequoia (2005). Manual - part 945

AC3HA–02

I21386

I21385

I21393

I21389

AC–42

–

AIR CONDITIONING

REAR A/C UNIT

3769

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 CONDITIONING

REAR A/C UNIT

AC–43

3770

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 CONDITIONING

REAR A/C UNIT

3771

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 CONDITIONING

REAR A/C UNIT

AC–45

3772

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 terminal

Position

1

FOOT

2

B/L 2

3

B/L 1

4

FACE 2

5

FACE 1