1996 TOYOTA LAND CRUISER air condition

N14295
AC2S9−01
−
AIR CONDITIONING THERMISTOR
AC−59
1386
Author: Date:
1996 LAND CRUISER (RM451U)
THERMISTOR
ON−VEHICLE INSPECTION
1. REMOVE GLOVE COMPARTMENT PARTS
(See page BO−76 )
2. INSPECT THERMISTOR RESISTANCE
Measure the resistance between terminals.
Standard resistance:
1,500 Ω at 25 ° C (77 °F)
If resistance is not as specified, replace the sensor.
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AC2SA−01
I03338
ThermometerIce
10 cm
(3.9 in.)
Thermistor Ohmmeter
Z04352
(
Ω )
0
500
1,000 1,500 2,000
2,500
3,000 3,500 4,000 4,500 5,000
0 510152025(
°C)
32 41 50 59 68 77 ( °F)
AC−60
−
AIR CONDITIONING THERMISTOR
1996 LAND CRUISER (RM451U)
INSPECTION
1. REMOVE THERMISTOR
2. INSPECT THERMISTOR RESISTANCE
(a) Place the thermistor in cold water, while varying tempera-
ture of the water, measure resistance at the connector
and at the same time, measure temperature of the water
with a thermometer.
(b) Compare the 2 readings on the chart.
If resistance is not as specified, replace the thermistor.
3. REINSTALL THERMISTOR
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N16452
AC2SB−01
Z13470
Low Pressure Side
ON (Continuity)
196 kpa
(2.0 kgf·cm
2, 28 psi)
OFF (No Continuity) High Pressure Side
3,140 kpa
(32.0 kgf·cm2, 455 psi)
OFF (No Continuity)
−
AIR CONDITIONING PRESSURE SWITCH
AC−61
1388
Author: Date:
1996 LAND CRUISER (RM451U)
PRESSURE SWITCH
ON−VEHICLE INSPECTION
1. INSTALL MANIFOLD GAUGE SET
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 1,500 RPM
4. INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 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.
5. STOP ENGINE AND REMOVE MANIFOLD GAUGE
SET
6. CONNECT CONNECTOR TO PRESSURE SWITCH
~11L
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AC2SC−01
N14163
AC−62
−
AIR CONDITIONING PRESSURE SWITCH
1996 LAND CRUISER (RM451U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERA TION
SYSTEM
HINT:
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount:
850 ± 50 g (29.98 ± 1.76 oz.)
2. REMOVE PRESSURE SWITCH
(a) Disconnect the connector.
(b) Remove the pressure switch from the liquid tube. Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)
HINT:
At the time of installation, lubricate a new O− ring with compres-
sor oil and install the switch.
HINT:
Lock the switch mount on the tube with an open end wrench,
being careful not to deform the tube, and remove the switch.
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AC2SD−01
−
AIR CONDITIONING PRESSURE SWITCH
AC−63
1996 LAND CRUISER (RM451U)
INSTALLATION
Installation is in the reverse order of removal (See page AC−62 ).
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Z19533
1
2
3
4
5 12
3
4
5
AC2SE−03
AC−64
−
AIR CONDITIONING HEATER MAIN RELAY
1391
Author: Date:
1996 LAND CRUISER (RM451U)
HEATER MAIN RELAY
INSPECTION
INSPECT HEATER MAIN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 − 3
2 − 4Continuity
Apply B+ between
terminals 3 and 5.4 − 5Continuity
If continuity is not as specified, replace the relay.
BE1850 BElS44
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Z09804
1
23
4
5
6
1
3
6 2
4
AC2SF−01
−
AIR CONDITIONING REAR HEATER RELAY
AC−65
1392
Author: Date:
1996 LAND CRUISER (RM451U)
REAR HEATER RELAY
INSPECTION
INSPECT REAR HEATER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant2 − 6
1 − 3Continuity
Apply B+ between
terminals 2 and 6.1 − 4Continuity
If continuity is not as specified, replace the relay.
H-8-2BE1844
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Z09507
1
2
3
4 412
4
3AC2SG−01
AC−66
−
AIR CONDITIONING MAGNETIC CLUTCH RELAY
1393
Author: Date:
1996 LAND CRUISER (RM451U)
MAGNETIC CLUTCH RELAY
INSPECTION
INSPECT MAGNETIC CLUTCH RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 − 3 Continuity
Apply B+ between
terminals 1 and 3.2 − 4Continuity
If continuity is not as specified, replace the relay.BE1647BE1841
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