TOYOTA LAND CRUISER 1998 Factory User Guide

I24450
I25157
I25184
- AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY
AC-101
2826 Author
: Date
:
2004 LAND CRUISER (RM1071U)
5. w/ navigation system:
REMOVE INTEGRATION CONTROL PANEL
6. Disconnect the connector clamps.
(a) Remove the screw, the 2 bolts and the radio receiver
bracket RH.
(b) Remove the integration control panel from the radio re-
ceiver.
7. w/o navigation system:
REMOVE INTEGRATION CONTROL PANEL
(a) Disconnect the connector clamp.
(b) Remove the 2 screws, 4 bolts and the radio receiver
bracket LH.
(c) Disconnect the connector clamp.
(d) Remove the 2 screws, 4 bolts and the radio receiver
bracket RH.
(e) Remove the integration control panel.

AC22D-03
I06876
AC-1 10
- AIR CONDITIONINGAIR CONDITIONING AMPLIFIER (for Rear A/C)
2835 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AIR CONDITIONING AMPLIFIER
(for Rear A/C)
INSPECTION
1. REMOVE REAR DOOR SCUFF PLATE RH
2. REMOVE REAR FLOOR MAT SUPPORT PLATE
3. REMOVE QUARTER TRIM PANEL RH
4. REMOVE A/C AMPLIFIER
(a) Disconnect the connectors.
(b) Remove the 2 screws and the A/C amplifier.
5. INSPECT REAR A/C AMPLIFIER CIRCUIT
(See page DI-1309)

AC1HN-04
N13793
Charging Cylinder High Pressure
Service Valve Low Pressure
Service ValvePush
Air
N13792
Gas Leak
Detector
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-1 1
2736 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CHARGING
1. INSTALL CHARGING CYLINDER
HINT:
When handling the charging cylinder, always follow the direc-
tions given in the instruction manual.
(a) Charge the proper amount of refrigerant into the charging
cylinder.
(b) Connect the center hose to the charging cylinder.
CAUTION:
Do not open both high and low hand valves of manifold
gauge set.
(c) Open the valve of the charging cylinder.
(d) Press the valve core on the side of manifold gauge and
expel the air inside the center hose.
2. INSPECT REFRIGERATION SYSTEM FOR LEAKS
(a) Open the high pressure hand valve and the charge refrig-
erant.
(b) When the low pressure gauge indicates 98 kPa
(1 kgf/cm
2, 14 psi), close the high pressure hand valve.
(c) Using a gas leak detector, check the system for any leak-
age.
If leaks are found, repair the faulty component or connection.
CAUTION:
Use the refrigerant recovery/ recycling machine to recover
the refrigerant whenever replacing parts.

N13790
Low Pressure
Service Valve
High Pressure
Service Valve
I08298
Properly
Charged
Insufficiently
Charged
AC-12
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2737 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3. CHARGE REFRIGERANT INTO REFRIGERATION
SYSTEM
If there is no leak after refrigerant leak check, charge the proper
amount of refrigerant into the refrigeration system.
CAUTION:

Do not run the engine when charging the system
through the high pressure side.

Do not open the low pressure hand valve when the
system is being charged with liquid refrigerant.
(a) Open the high pressure hand valve fully.
(b) Charge specified amount of refrigerant, then close the
high pressure hand valve.
HINT:
No bubbles in the sight glass indicates that the system is fully
charged.
(c) Partially charge the refrigeration system with refrigerant.
(1) Start engine and race engine at 1,500 rpm.
(2) Set fan speed selector to ºHIº.
(3) Set temperature control to ºMAX. COOLº.
(4) Set air inlet control to ºRECIRCº.
(5) Fully open doors (Sliding roof: closed).
(6) Open the low pressure hand valve.
CAUTION:
Do not open the high pressure hand valve.
(d) Charge refrigerant until bubbles disappear and check the
pressure on the gauge through the sight glass.

AC1HM-04
N13795
Quick Disconnect
Adapter
Charging
Service ValveHose
N13794
Vacuum Pump
Vacuum Pump Adapter
N13791
Low Pressure
Service Valve
Vacuum Pump Adapter High Pressure
Service ValveManifold
Gauge
Set
AC-10
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2735 Author
: Date
:
2004 LAND CRUISER (RM1071U)
EVACUATING
1. CONNECT QUICK DISCONNECT ADAPTER TO
CHARGING HOSES
2. REMOVE CAPS FROM SERVICE VALVES ON RE-
FRIGERANT LINES
3. SET ON MANIFOLD GAUGE SET
(a) Close both the hand valves of the manifold gauge set.
(b) Connect the quick disconnect adapters to the service
valves.
4. EVACUATE AIR FROM REFRIGERATION SYSTEM
(a) Connect the vacuum pump adapter to the vacuum pump.
(b) Connect the center hose of the manifold gauge set to the
vacuum pump adapter.
(c) Open both the high and low hand valves and run the vacu-
um pump.
(d) After 10 minutes or later, check that the low pressure
gauge indicates 750 mmHg (30 in. Hg) minimum.
HINT:
If the reading is 750 mmHg (30 in. Hg) close both hand valves
of the manifold gauge set and stop the vacuum pump.
Check the system for leaks and repair if necessary.
(e) Close both the high and low hand valves and stop the vac-
uum pump.
(f) Leave the system in this condition for at least 5 minutes
and check that there is no gauge indicator.

AC1HO-05
I24786
Pressure Switch Compressor and Magnetic Clutch
Ambient Temperature Sensor
CondenserNo.1 Junction Block
 HTR Relay
 RR HTR Relay
 MG CLT Relay
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-13
2738 Author
: Date
:
2004 LAND CRUISER (RM1071U)
LOCATION

I24787
Front Heater Unit
 Heater Radiator
 Air Mix Servomotor
 Air Outlet Servomotor Solar Sensor
Front Cooling Unit
 Expansion Valve
 Evaporator
 Evaporator Temperature Sensor Rear Heater Unit
 Blower Motor
 Power Transistor
 Heater Radiator
 Air Mix Servomotor
 Air Inlet Temperature Sensor
Room Temperature Sensor
(for Rear A/C)
Rear Cooling Unit
 Blower Motor
 Power Transister
 Evaporator
 Thermistor
 Expansion Valve with Magnetic Valve
Blower Unit
 Blower Motor
 Blower Motor Control Rela
y
 Air Inlet ServomotorA/C Amplifier
Integration Control Panel Room Temperature Sensor
(for Front A/C)
Rear A/C Control Switchw/ EMV:
w/o EMV:
A/C Control
A/C Amplifier
Cowl Side J/B LH

ACC Fuse
Cowl Side J/B RH

RR A/C AC-14
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2739 Author
: Date
:
2004 LAND CRUISER (RM1071U)

AC1HL-05
I06757
Sight Glass
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-3
2728 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
Observe the sight glass on the liquid tube.
Test conditions:

Engine speed at 1,500 rpm

Fan speed selector at ºHIº position

A/C switch ON

Temperature control dial at ºCOOLº position

Doors fully opened
ItemSymptomAmount of refrigerantRemedy
1Bubbles appear in sight glassInsufficient*
(1) Check for gas leakage with gas leak de-
tector and repair, if necessary
(2) Add refrigerant until bubbles disappear
2No bubbles appear in sight glassNone, sufficient or too muchRefer to item 3 and 4
3No temperature difference between com-
pressor inlet and outletEmpty or nearly empty
(1) Check for gas leakage with gas leak de-
tector and repair, if necessary
(2) Add refrigerant until bubbles disappear
4Temperature between compressor inlet and
outlet is noticeably differentCorrect or too muchRefer to items 5 and 6
5
Immediately after air conditioning system is
turned off, refrigerant in sight glass stays
clear
Too much
(1) Discharge refrigerant
(2) Evacuate air and charge proper amount
of purified refrigerant
6When air conditioning system is turned off,
refrigerant foams and then stays clearCorrect-
*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling
is sufficient.

I01386
AC-4
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2729 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. INSPECT REFRIGERANT PRESSURE WITH MAN-
IFOLD GAUGE SET
Check the trouble area using a set of manifold gauge set. Read
the manifold gauge pressure when following conditions are de-
tected.
Test conditions:

Temperature at the air inlet with the switch set
at RECIRC is 30 - 35 °C (86 - 95 °F)

Engine running at 2,000 rpm

Fan speed selector at ºHIº position

Temperature control dial on ºCOOLº position
HINT:
It should be noted that the gauge indications may vary depend-
ing on ambient temperature conditions.
(1) Normally functioning refrigeration system.
Gauge reading:
Low pressure side:
0.15 - 0.25 MPa (1.5 - 2.5 kgf/cm
2)
High pressure side:
1.37 - 1.57 MPa (14 - 15 kgf/cm
2)

I01387
Condition : Periodically cools and then fails to cool
I01388
Condition: Insufficient cooling
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-5
2730 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(2) Moisture present in refrigeration system.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
During operation, pressure on low
pressure side sometimes become
a vacuum and sometime normal
Moisture entered in refrigeration
system freezes at expansion valve
orifice and temporarily stops cycle,
but normal state is restored after a
time when the ice melts
Drier in over-saturated state

Moisture in refrigeration system
freezes at expansion valve orifice
and blocks circulation of refriger-
ant(1) Replace condenser
(2) Remove moisture in cycle
through repeatedly evacuating air
(3) Charge proper amount of new
refrigerant
(3) Insufficient cooling.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure low on both low and
high pressure sides

Bubbles seen in sight glass con-
tinuously

Insufficient cooling performance
Gas leakage at some place in re-
frigeration system
Insufficient refrigerant in system

Refrigerant leaking
(1) Check for gas leakage with gas
leak detector and repair if neces-
sary
(2) Charge proper amount of re-
frigerant
(3) If indicated pressure value is
near 0 when connected to gauge,
create the vacuum after inspecting
and repairing the location of the
leak