Toyota Sequoia (2005). Manual - part 957

I21435

AC1LO–07

AC–90

–

AIR CONDITIONING

ROOM TEMPERATURE SENSOR (for Rear A/C)

3817

ROOM TEMPERATURE SENSOR
(for Rear A/C)

INSPECTION

1.

REMOVE ROOM TEMPERATURE SENSOR

Using a scrwedriver, pull out the sensor, then disconnect the
connector.
2.

INSPECT ROOM TEMPERATURE SENSOR CIRCUIT
(See page 

DI–2333

)

3.

INSTALL ROOM TEMPERATURE SENSOR

I21426

AC1LP–07

–

AIR CONDITIONING

AMBIENT TEMPERATURE SENSOR

AC–91

3818

AMBIENT TEMPERATURE
SENSOR

INSPECTION

1.

REMOVE AMBIENT TEMPERATURE SENSOR

(a)

Disconnect the connector.

(b)

Pull out the sensor.

2.

INSPECT AMBIENT TEMPERATURE SENSOR 
(See page 

DI–2322

)

3.

INSTALL AMBIENT TEMPERATURE SENSOR

I21455

2

1

3

4

AC1LS–03

Z13470

Low pressure

High pressure

side

side

ON (Continuity)

3,140 kpa

196 kpa

(2.0 kgf/cm

2

, 28psi)

OFF (No Continuity)

(32.0 kgf/cm

2

, 455psi)

OFF (No Continuity)

I05079

ON (Continuity)

1,520 kpa

1,230 kpa

(12.5 kgf/cm

2

, 178psi)

OFF (No Continuity)

(15.5 kgf/cm

2

, 220psi)

Cooling Fan Control

AC–92

–

AIR CONDITIONING

PRESSURE SWITCH

3819

PRESSURE SWITCH

ON–VEHICLE INSPECTION

1.

SET MANIFOLD GAUGE SET (See page 

AC–18

)

2.

DISCONNECT CONNECTOR

3.

RUN ENGINE AT APPROX. 2,000 rpm

4.

SET BLOWER SPEED CONTROL SWITCH TO ”HI”
POSITION

5.

SET TEMPERATURE CONTROL LEVER TO ”MAX.
COOL” POSITION

6.

A/C SWITCH ON

7.

INSPECT PRESSURE SWITCH OPERATION

(a)

Connect the positive (+) lead from the ohmmeter to termi-
nal 4 and the negative (–) lead to terminal 1.

(b)

Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.

If operation is not as specified, replace the pressure switch.

8.

Cooling fan control:
INSPECT PRESSURE SWITCH OPERATION

9.

STOP ENGINE AND REMOVE MANIFOLD GAUGE
SET

10.

CONNECT CONNECTOR TO PRESSURE SWITCH

(a)

Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (–) lead to terminal 3.

(b)

Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.

If operation is not as specified, replace the pressure switch.
11.

STOP ENGINE AND REMOVE MANIFOLD GAUGE
SET

12.

CONNECT CONNECTOR TO PRESSURE SWITCH

AC1LT–05

I21452

–

AIR CONDITIONING

PRESSURE SWITCH

AC–93

3820

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.

REMOVE PRESSURE SWITCH FROM LIQUID TUBE

Disconnect the connector and remove the pressure switch.

Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)

HINT:

Being careful not to deform the tube, lock the switch
mounted on the tube with an open end wrench and re-
move the switch.

At the time of installation, refer to the following:
Lubricate a new O–ring with the compressor oil and install
it to the switch.