Page 3825 of 4323
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
Page 3826 of 4323
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
Page 3827 of 4323

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
Page 3828 of 4323
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.
Page 3829 of 4323
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).
Page 3830 of 4323
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.
Page 3831 of 4323

AC1LZ±05
I21428
1 2
AC±96
± AIR CONDITIONINGCONDENSER FAN
3823 Author: Date:
2005 SEQUOIA (RM1146U)
CONDENSER FAN
ON±VEHICLE INSPECTION
1. INSPECT CONDENSER FAN OPERATION
Inspect the fan operation under the following conditions, as
shown in the chart.
Test conditions:
Start engine
Blower speed control switch position ºHIº
Temperature control dial at ºCOOLº position
Set manifold gauge set
A/C switch ON
ConditionFan operation (Fan speed)
Refrigerant pressure is less than
1,520 kPa (15.5 kgf/cm2, 220 psi)OFF
Refrigerant pressure is 1,520 kPa
(15.5 kgf/cm2, 220 psi) or aboveRotate
If operation is not as specified, proceed to the next inspection.
2. INSPECT CONDENSER FAN MOTOR OPERATION
(a) Disconnect the fan connector.
(b) Connect the battery and ammeter.
(c) Check that the fan rotates smoothly, and then check the
reading on the ammeter.
Specified amperage: 9.2 to 11.0 A at 20°C (68°F)
If operation is not as specified, replace the fan motor.
If operation is as specified, check the pressure switch, cooling
fan relays and water temp. switch.
Page 3832 of 4323
AC1M0±04
I21429
Fan
Fan Shroud
MotorCondenser Fan
Wire Harness
± AIR CONDITIONINGCONDENSER FAN
AC±97
3824 Author: Date:
2005 SEQUOIA (RM1146U)
COMPONENTS