service TOYOTA LAND CRUISER 1998 Factory Repair Manual

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.

AC-2
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2727 Author
: Date
:
2004 LAND CRUISER (RM1071U)
9. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The LAND CRUISER is equipped with SRS (Supplemental Re-
straint System) such as the driver airbag and the front passen-
ger airbag. Failure to carry out service operation in the correct
sequence could cause the SRS to unexpectedly deploy during
servicing, possibly leading to a serious accident. Before servic-
ing (including removal or installation of parts, inspection or re-
placement), be sure to read the precautionary notices in the RS
section.

AC1HT-04
N06553
- AIR CONDITIONINGMANIFOLD GAUGE SET
AC-19
2744 Author
: Date
:
2004 LAND CRUISER (RM1071U)
SET OFF
1. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
2. DISCONNECT QUICK DISCONNECT ADAPTERS
FROM SERVICE VALVES ON REFRIGERANT LINE
HINT:
Slide the sleeve of the quick disconnect adapter upward to un-
lock the adapter and remove it from the service valve.
3. INSTALL CAPS TO SERVICE VALVES ON REFRIGER-
ANT LINE

I06814
High Pressure
Charging ValveLow Pressure
Charging Valve
AC1HS-05
N04392
Sleeve
AC-18
- AIR CONDITIONINGMANIFOLD GAUGE SET
2743 Author
: Date
:
2004 LAND CRUISER (RM1071U)
MANIFOLD GAUGE SET
SET ON
1. CONNECT CHARGING HOSE TO MANIFOLD GAUGE
SET
Tighten the nuts by hand.
CAUTION:
Do not connect the wrong hoses.
2. CONNECT QUICK DISCONNECT ADAPTERS TO
CHARGING HOSES
Tighten the nuts by hand.
3. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
4. REMOVE CAPS FROM SERVICE VALVES ON RE-
FRIGERANT LINES
5. CONNECT QUICK DISCONNECT ADAPTERS TO SER-
VICE VALVES
HINT:
Push the quick disconnect adapter onto the service valve, then
the sleeve of the quick disconnect adapter downward to lock it.

AC1HT-04
N06553
- AIR CONDITIONINGMANIFOLD GAUGE SET
AC-19
2744 Author
: Date
:
2004 LAND CRUISER (RM1071U)
SET OFF
1. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
2. DISCONNECT QUICK DISCONNECT ADAPTERS
FROM SERVICE VALVES ON REFRIGERANT LINE
HINT:
Slide the sleeve of the quick disconnect adapter upward to un-
lock the adapter and remove it from the service valve.
3. INSTALL CAPS TO SERVICE VALVES ON REFRIGER-
ANT LINE

I06814
High Pressure
Charging ValveLow Pressure
Charging Valve
AC1HS-05
N04392
Sleeve
AC-18
- AIR CONDITIONINGMANIFOLD GAUGE SET
2743 Author
: Date
:
2004 LAND CRUISER (RM1071U)
MANIFOLD GAUGE SET
SET ON
1. CONNECT CHARGING HOSE TO MANIFOLD GAUGE
SET
Tighten the nuts by hand.
CAUTION:
Do not connect the wrong hoses.
2. CONNECT QUICK DISCONNECT ADAPTERS TO
CHARGING HOSES
Tighten the nuts by hand.
3. CLOSE BOTH HAND VALVES OF MANIFOLD GAUGE
SET
4. REMOVE CAPS FROM SERVICE VALVES ON RE-
FRIGERANT LINES
5. CONNECT QUICK DISCONNECT ADAPTERS TO SER-
VICE VALVES
HINT:
Push the quick disconnect adapter onto the service valve, then
the sleeve of the quick disconnect adapter downward to lock it.

BE2E8-01
30 kHz 300 kHz 3 MHz 30 MHz 300 MHz
LF MF HF VHF
AM FM
Frequency modulation Frequency
Designation
Radio wave
Modulation Amplitude modulation
BE2818
FM (Stereo)
FM (Monaural)
AM
BE2819
Fading:lonosphere BE-124
- BODY ELECTRICALAUDIO SYSTEM
2497 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AUDIO SYSTEM
DESCRIPTION
1. RADIO WAVE BAND
The radio wave bands used in radio broadcasting are as follows:
LF: Low Frequency
MF: Medium Frequency
HF: High Frequency
VHF: Very High Frequency
2. SERVICE AREA
There are great differences in the size of the service area for AM
and FM monaural. Sometimes FM stereo broadcasts cannot be
received even through AM can be received in very clearly.
Not only does FM stereo have the smallest service area, but it
also picks up static and other types of interference (ºnoiseº)
easily.
3. RECEPTION PROBLEMS
Besides the problem of static, there are also the problems
called ºfadingº, ºmultipathº and ºfade outº. These problems are
caused not by electrical noise but by the nature of the radio
waves themselves.
(1) Fading
Besides electrical interference, AM broadcasts are
also susceptible to other types of interference, es-
pecially at night. This is because AM radio waves
bounce off the ionosphere at night. These radio
waves then interfere with the signals from the same
transmitter that reach the vehicle's antenna directly.
This type of interference is called ºfadingº.

BE2E9-01
I25054
ºTUNE DOWNº
Switchº4chº Switchº5chº Switch
º6chº Switch
ºTUNE UPº
Switch º1chº Switch
º2chº Switchº3chº Switch
ºDISCº Switch
- BODY ELECTRICALAUDIO SYSTEM
BE-129
2502 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TROUBLESHOOTING
1. DIAGNOSIS FUNCTION (Main AVC-LAN)
(a) Diagnosis start-up
For shifting to diagnosis mode, turn the ignition switch ON and push the ºDISCº switch 3 times while
pressing ºch1º and ºch6º switches.
HINT:
To exit the diagnosis mode, push the ºDISCº switch for 1.7 sec. or turn the ignition switch to ACC or OFF.
(b) Element check mode
After the diagnosis start-up, the system enters the element check mode. Check that the all elements
light up.
HINT:
By pressing the ºTUNE UPº switch, the system enters the ºService Check Modeº.
(c) Switch check mode
(1) Element check mode is started at the same time with the switch check mode.
(2) Check that there is a beep sound when any switch is pressed.
HINT:
By pressing ºTUNE UPº switch, the system enters the ºService Check Modeº.