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
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
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
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.
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