TOYOTA SEQUOIA 2001 Service Repair Manual

I21456
AC3HR±02
AC±86
± AIR CONDITIONINGAIR MIX SERVOMOTOR
3813 Author: Date:
2005 SEQUOIA (RM1146U)
AIR MIX SERVOMOTOR
INSPECTION
1. REMOVE AIR MIX SERVOMOTOR
(a) Disconnect the connector.
(b) Remove the 3 screws and servomotor.
2. INSPECT AIR MIX DAMPER POSITION SERVOMO-
TOR (See page DI±2346)
3. INSPECT AIR MIX SERVOMOTOR CIRCUIT
(See page DI±2355)
4. INSTALL AIR MIX SERVOMOTOR

AC3HS±02
I21375
I03738
± AIR CONDITIONINGTHERMISTOR (for Rear A/C)
AC±87
3814 Author: Date:
2005 SEQUOIA (RM1146U)
THERMISTOR (for Rear A/C)
INSPECTION
1. REMOVE SIDE HEATER COVER
2. REMOVE THERMISTOR
(a) Disconnect the connector and connector clamp.
(b) Using a screwdriver, pull out the sensor.
HINT:
Tape the screwdriver tip before use.
(c) Release the 2 claws and remove the sensor from the
bracket plate.
3. INSPECT THERMISTOR (See page DI±2330)
4. INSTALL THERMISTOR
5. INSTALL SIDE HEATER COVER

I21433
AC1LM±07
AC±88
± AIR CONDITIONINGSOLAR SENSOR
3815 Author: Date:
2005 SEQUOIA (RM1146U)
SOLAR SENSOR
INSPECTION
1. REMOVE SOLAR SENSOR
Using a screwdriver, pull out the sensor, then disconnect
the connector.
HINT:
Tape the screwdriver tip before use.
2. INSPECT SOLAR SENSOR CIRCUIT
(See page DI±2336)
3. INSTALL SOLAR SENSOR

I21434
AC3HT±02
± AIR CONDITIONINGROOM TEMPERATURE SENSOR
AC±89
3816 Author: Date:
2005 SEQUOIA (RM1146U)
ROOM TEMPERATURE SENSOR
INSPECTION
1. REMOVE ROOM TEMPERATURE SENSOR
Using a screwdriver, pull out the sensor, then disconnect the
connector and aspirator hose.
HINT:
Tape the screwdriver tip before use.
2. INSPECT ROOM TEMPERATURE SENSOR CIRCUIT
(See page DI±2319)
3. INSTALL ROOM TEMPERATURE SENSOR

I21435
AC1LO±07
AC±90
± AIR CONDITIONINGROOM TEMPERATURE SENSOR (for Rear A/C)
3817 Author: Date:
2005 SEQUOIA (RM1146U)
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 CONDITIONINGAMBIENT TEMPERATURE SENSOR
AC±91
3818 Author: Date:
2005 SEQUOIA (RM1146U)
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
13
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/cm2, 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 CONDITIONINGPRESSURE SWITCH
3819 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºHIº
POSITION
5. SET TEMPERATURE CONTROL LEVER TO ºMAX.
COOLº 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 CONDITIONINGPRESSURE SWITCH
AC±93
3820 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. 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.

AC1LU±01
AC±94
± AIR CONDITIONINGPRESSURE SWITCH
3821 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±93).

I21427
Heater RelayCondenser
Fan Relay
Magnetic
Clutch Relay
Rear Heater Relay
AC3HU±02
N02832
1
2 3
5
1
23
5
4
4
Z18060
23
15
5
13
2
± AIR CONDITIONINGRELAY
AC±95
3822 Author: Date:
2005 SEQUOIA (RM1146U)
RELAY
INSPECTION
1. REMOVE RELAY
(a) Remove the heater relay.
(b) Remove the rear heater relay.
(c) Remove the condenser fan relay.
(d) Remove the magnetic clutch relay.
2. INSPECT RELAY
(a) Inspect the heater and rear heater relay for continuity.
ConditionTester connectionSpecified condition
Constant1 ± 2
3 ± 4Continuity
Apply B+ between
terminals 3 and 5.3 ± 5Continuity
If continuity is not as specified, replace the relay.
(b) Inspect the magnetic clutch and condenser fan for relay
continuity.
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.