TOYOTA LAND CRUISER 1998 Factory Owner's Manual

I01389
Condition: Insufficient cooling
I01449
Condition: Does not cool (Cools from time to time in some cases) AC-6
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2731 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(4) Poor circulation of refrigerant.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure low in both low and
high pressure sides

Frost on tube from condenser to
unit
Refrigerant flow obstructed by dirt
in condensercondenser cloggedReplace condenser
(5) Refrigerant does not circulate.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Vacuum indicated on low pres-
sure side, very low pressure indi-
cated on high pressure side

Frost or dew seen on piping be-
fore and after condenser/ drier or
expansion valve
Refrigerant flow obstructed by
moisture or dirt in refrigeration sys-
tem

Refrigerant flow obstructed by
gas leakage from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by blowing with air
(3) Replace condenser
(4) Evacuate air and charge new
refrigerant to proper amount
(5) For gas leakage from expan-
sion valve, replace expansion
valve

I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient cooling
NOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-7
2732 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(6) Refrigerant overcharged or insufficient cooling of
condenser.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

No air bubbles seen through the
sight glass even when the engine
rpm is lowered
Unable to develop sufficient per-
formance due to excessive refrig-
eration system

Insufficient cooling of condenser
Excessive refrigerant in
cycle " refrigerant over charged

Condenser cooling " condenser
fins clogged or cooling fan faulty
(1) Clean condenser
(2) Check cooling fan with fluid
coupling operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant,
and charge proper amount of re-
frigerant
(7) Air present in refrigeration system.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

The low pressure piping hot to
touch

Bubbles seen in sight glass
Air entered in refrigeration system

Air present in refrigeration sys-
tem

Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insufficient
(2) Evacuate air and charge new
refrigerant

I01450
Condition: Insufficient cooling
I01393
Condition : Does not cool AC-8
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
2733 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(8) Expansion valve improperly.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

Frost or large amount of dew on
piping on low pressure side
Trouble in expansion valve

Excessive refrigerant in low
pressure piping

Expansion valve opened too
wide
Check expansion valve, and re-
place if defective
(9) Defective compression compressor.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on low and
high pressure sides

Pressure too low on high pres-
sure side
Internal leak in compressor

Compression defective

Valve leaking or broken sliding
parts
Repair or replace compressor

- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-9
2734 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3. INSPECT IDLE-UP SPEED
(a) Warm up engine
(b) Inspect idle-up speed when following conditions are es-
tablished.
Test conditions:

Fan speed selector at ºHIº position

Temperature control dial at ºCOOLº position

A/C switch ON

Put gear shift in neutral
Magnetic clutch conditionIdle-up speed
Magnetic clutch not engaged700 ± 50 rpm
Magnetic clutch engaged780 ± 50 rpm
If idle speed is not as specified, check the idle control system.
4. INSPECT FOR LEAKAGE OF REFRIGERANT
(a) Stop engine.
(b) Secure good ventilation (The gas leak detector may not
react to volatile gases which are not refrigerant, such as
evaporated gasoline and exhaust gas)
(c) Repeat the test 2 or 3 times
(d) Make sure that there is some refrigerant remaining in the
refrigeration system.
When compressor is OFF: approx. 392 - 588 kPa (4 - 6
kgf´cm
2, 57 - 85 psi)
(e) Bring the gas leak detector close to the drain hose before
performing the test.
HINT:

After the blower motor stops, leave the cooling for more
than 15 minutes.

Expose the gas leak detector sensor under the drain
hose.

When bring the gas leak detector close to the drain hose,
make sure that the gas leak detector does not react to the
volatile gases.
If gas leaks are detected, lift up the vehicle.
(f) If gas leaks are not detected on the drain hose, remove
the blower resistor from the cooling unit. Then insert the
gas leak detector sensor into the unit to perform the test.
(g) Disconnect the connector and leave the pressure switch
for approx. 20 minutes. Then bring the gas leak detector
close to the pressure switch to perform the test.
(h) Bring the gas leak detector close to the refrigerant lines.

AC2810
AC1HK-04
AC2811
N11084
Wrong Okay
HI LO HILO
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-1
2726 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR SAFETY GLASSES FOR EYE
PROTECTION
3. AVOID YOUR EYES AND SKIN TO CONTACT WITH
LIQUID REFRIGERANT
If you get the liquid refrigerant in your eyes or on your skin:
(a) Wash out the area with lots of cold water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a physician or hospital for professional
treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. DO NOT DROP CONTAINER NOR APPLY PHYSICAL
SHOCKS TO IT.
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERANT SYSTEM
If there is not enough refrigerant in the refrigerant system, oil lu-
brication will be insufficient and compressor burnout may occur.
To avoid this, always keep enough refrigerant in the refrigerant
system.
7. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILE COMPRESSOR IS OPERATING
If the high pressure valves opened, refrigerant flows in the re-
verse direction and could cause the charging cylinder to rup-
ture, so open and close the only low pressure valve.
8. DO NOT OVERCHARGE REFRIGERANT SYSTEM
WITH REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.

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.

AC1LQ-04
I08494
AC-90
- AIR CONDITIONINGAIR INLET TEMPERATURE SENSOR
2815 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AIR INLET TEMPERATURE
SENSOR
INSPECTION
1. REMOVE FRONT SEATS
2. REMOVE REAR CONSOLE BOX
3. REMOVE FRONT CONSOLE BOX COVER
4. REMOVE LOWER CENTER CLUSTER FINISH PANEL
5. REMOVE FRONT DOOR SCUFF PLATES
6. REMOVE COWL SIDE TRIMS
7. REMOVE REAR DOOR SCUFF PATES
8. REMOVE CENTER PILLAR GARNISHES
9. REMOVE AIR INLET TEMPERATURE SENSOR
(a) Slide the floor carpet backward.
(b) Disconnect the connector.
(c) Remove the screw and the air inlet temperature sensor.
10. INSPECT AIR INLET TEMPERATURE SENSOR CIR-
CUIT (See page DI-1342)
11. INSTALL AIR INLET TEMPERATURE SENSOR
(a) Install the air inlet temperature sensor with the screw.
(b) Connect the connector.
(c) Install the floor carpet.
12. INSTALL CENTER PILLAR GARNISHES
13. INSTALL REAR DOOR SCUFF PLATES
14. INSTALL COWL SIDE TRIMS
15. INSTALL FRONT DOOR SCUFF PLATES
16. INSTALL REAR CONSOLE BOX
17. INSTALL FRONT SEATS

I06741
AC1LK-06
AC-84
- AIR CONDITIONINGAIR MIX SERVOMOTOR (for Front A/C)
2809 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AIR MIX SERVOMOTOR (for Front
A/C)
INSPECTION
1. REMOVE AIR MIX SERVOMOTOR
(a) Disconnect the connector.
(b) Remove the 2 screws and the air mix servomotor.
2. INSPECT AIR MIX SERVOMOTOR OPERATION
(See page DI-1354)
3. INSPECT AIR MIX DAMPER POSITION SENSOR
(See page DI-1345)
4. INSTALL SERVOMOTOR
(a) Install the servomotor with the 3 screws.
(b) Connect the connector.

AC1LL-06
I06742
Z19151
DEF.FOOT/DEF.
FOOT BI-LEVEL
FACE
1
2
3
4 5 6
70 ± 2.5°
- AIR CONDITIONINGAIR OUTLET SERVOMOTOR
AC-85
2810 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AIR OUTLET SERVOMOTOR
INSPECTION
1. REMOVE LOWER NO. 1 PANEL (See page BO-84)
2. REMOVE AIR OUTLET SERVOMOTOR
(a) Disconnect the connector.
(b) Remove the 3 screws and the air outlet servomotor.
3. INSPECT AIR OUTLET SERVOMOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
6 and the negative (-) lead to terminal 7.
(b) Connect the negative (-) lead from the battery to each ter-
minal and check that the shaft rotates at each position, as
shown in the illustration.
Connected terminalPosition
5DEF.
4FOOT/DEF.
3FOOT
2B/L
1FACE
If operation is not as specified, replace the servomotor.
4. INSTALL AIR OUTLET SERVOMOTOR
(a) Install the air outlet servomotor with the 3 screws.
(b) Connect the connector.

I06756
AC1LP-05
- AIR CONDITIONINGAMBIENT TEMPERATURE SENSOR
AC-89
2814 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AMBIENT TEMPERATURE
SENSOR
INSPECTION
1. REMOVE AMBIENT TEMPERATURE SENSOR
(a) Disconnect the connector.
(b) Remove the bolt and the ambient temperature sensor.
2. INSPECT AMBIENT TEMPERATURE SENSOR CIR-
CUIT (See page DI-1319)
3. INSTALL AMBIENT TEMPERATURE SENSOR
(a) Install the ambient temperature sensor to the condenser
upper bracket.
(b) Connect the connector.