1998 TOYOTA LAND CRUISER coolant temperature

A18907
(64 to 88 km/h)
(56 to 72 km/h)
Idling
Ignition OFF
Warmed up3 minutes
7 minutes 40 to 55 mph
35 to 45 mph
- DIAGNOSTICSENGINE
DI-31
224 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. CATALYST MONITOR (O2S TYPE)
(a) Preconditions
The monitor will not run unless:

MIL is OFF.

Engine Coolant Temperature (ECT) is 75°C (167°F) or greater.

Intake Air Temperature (IAT) is -10°C (14°F) or greater
NOTICE:
The readiness test can be completed in cold ambient conditions (less than -10°C / 14°F), if the drive
pattern is repeated a second time after cycling the ignition off.
(b) Drive Pattern
(1) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions.
(2) Drive the vehicle at 40 to 55 mph (64 to 88 km/h) for approximately for 3 minutes.
NOTICE:
Drive with smooth throttle operation and avoid sudden acceleration.
If IAT is less than 10°C (50°F) when engine was started, drive the vehicle at 40 to 55 mph (64 to 88
km/h) for additional 4 minutes.
(3) Drive the vehicle at 35 to 45 mph (56 to 72 km/h) for approximately 7 minutes.
NOTICE:
Drive with smooth throttle operation and avoid sudden deceleration as much as possible with the
throttle fully closed.
(4) If readiness status does not switch to complete, make sure that the preconditions are met and
the ignition switch is turned OFF and then repeat steps (2) and (3).
(5) Release pressure in the fuel tank by removing and then reinstalling the fuel tank cap.
(6) Start the engine and immediately begin driving as directed.

- DIAGNOSTICSENGINE
DI-33
226 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(a) Preconditions
The monitor will not run unless:

MIL is OFF

Fuel level is approximately 1/2 to 3/4

Altitude is 7,800 feet (2,400 m) or less*

Engine Coolant Temperature (ECT) is between 4.4°C and 35°C (40°F and 95°F)

Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F)

Cold Soak Procedure has been completed

Before starting the engine, the difference between ECT and IAT must be less than 7°C (13°F)
HINT:
Examples:

Scenario 1
ECT = 24°C (75°F)
IAT = 16°C (60°F)
Difference between ECT and IAT is 8°C (15°F)
" The monitor will not run because difference between ECT and IAT is greater than 7°C (13°F)

Scenario 2
ECT = 21°C (70°F)
IAT = 20°C (68°F)
Difference between ECT and IAT is 1°C (2°F)
" The monitor will run because difference between ECT and IAT is less than 7°C (13°F)
The readiness test can be completed in cold ambient conditions (less than 40°F / 4.4°C) and/or at
high altitudes (more than 7,800 feet / 2,400 m) if the drive pattern is repeated a second time after cycl-
ing the ignition off.
(b) Drive Pattern
(1) Connect the OBD II scan tool to DLC3 to check monitor status and preconditions (refer to ºaº).
(2) Release pressure in fuel tank by removing the fuel tank cap and then reinstalling it.
(3) Start the engine and allow it to idle until ECT becomes 75°C (167°F) or higher.
(4) Run the engine at 3,000 rpm for about 10 seconds.
(5) Allow the engine to idle with the A/C ON (to create slight load) for 15 to 50 minutes.
NOTICE:
If the vehicle is not equipped with A/C put a slight load on the engine by doing the following :

Securely set the parking brake.

Block the drive wheels with wheel chocks.

Allow the vehicle to idle in drive for 15 to 50 minutes.

2004 LAND CRUISER (EWD548U)
362Air Conditioning (Front)
1. Heater Blower Operation
Manual operation
When the blower speed is set ant any speed by the blower control SW, the A/C control assembly sends a signal to the
blower motor controller, and controls the blower motor speed.
Auto operation
When the auto SW is operated, the A/C control assembly sends signals to the blower motor controller, according to the
signals from respective sensors, commands from the temperature SW etc., and controls the blower motor automatically.
2. Air Inlet Control Servo Motor Control
When the FRESH/RECIRC select SW is switched to RECIRC, the motor in the air inlet control servo motor rotates to move
the damper to the RECIRC side. The damper position is recognized by the A/C control assembly TERMINAL TPI, and
rotates the motor until the damper reaches its position.
When the FRESH/RECIRC select SW is switched to FRESH, the motor in the air inlet control servo motor rotates to move
the damper to the FRESH side. The damper position is recognized by the A/C control assembly TERMINAL TPI, and rotates
the motor until the damper reaches its position.
When the FRESH/RECIRC select SW is set to auto, the exhaust gas sensor in the engine room detects the ingredient of the
exhaust emission, and switches the FRESH/RECIRC mode automatically.
3. Air Vent Mode Control Servo Motor
When the mode select SW in the A/C control assembly is pushed, a signal is sent from the A/C control assembly, and
activates the air vent mode control servo motor. This causes the servo motor to rotate to the position selected using the
mode select SW (FACE, BI-LEVEL, FOOT, FOOT/DEF, DEF), and moves the damper.
4. Air Mix Control Servo Motor
When the temperature control SW in the A/C control assembly is pushed, a signal is sent from the A/C control assembly, and
activates the air mix control servo motor. The motor and damper is moved until it reaches the temperature set by the
temperature control SW.
5. Air Conditioning Operation
The A/C control assembly receives various signals, i. e., the engine RPM from the crankshaft position sensor, outlet
temperature from the A/C ambient temp. sensor, coolant temperature from the engine coolant temp. sensor, and the lock
signal from the A/C compressor, etc. When the engine is started and the A/C SW is turned on, a signal is sent to the A/C
control assembly. As a result, the magnetic clutch is turned on and operates the compressor.
In addition, when the engine control module detects that the magnetic clutch is on and the A/C compressor is operating, it
controls the engine in the direction to avoid lowering the engine RPM during A/C operation.
When any of the following signals are sent to the A/C control assembly, the A/C is turned off.
*Coolant temp. is high.
*Outlet air temp. is low.
*Large difference between the engine speed and compressor speed.
*The refrigerant pressure is abnormally high or low.
A45 (A), A47 (C) A/C Control Assembly
(C)11-Ground : Always approx. 12 volts
(C)22-Ground : Approx. 12 volts with ignition SW at ON or ST position
(A)27-Ground : Approx. 12 volts with ignition SW at ON or ST position (w/o navigation system)
(C) 12, (C) 14, (C) 15, (C) 17, (C) 18-Ground : Always continuity
C28 Center Cluster Integration Panel (w/ Navigation System)
2-Ground : Approx. 12 volts with ignition SW at ON or ST position
16-Ground : Always continuity
System Outline
Service Hints

MA02R-05
MA-4
- MAINTENANCEUNDER HOOD
52 Author
: Date
:
2004 LAND CRUISER (RM1071U)
UNDER HOOD
GENERAL MAINTENANCE
1. GENERAL NOTICE

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance services after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item can cause the engine to run poorly and increase exhaust emissions.
2. WINDSHIELD WASHER FLUID
Check that there is sufficient fluid in the tank.
3. ENGINE COOLANT LEVEL
Check that the coolant level is between the LEVEL lines on the see-through reservoir at normal tem-
perature (20°C (68°F)).
4. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked with leaves, dirt or bugs.
(See page CO-14)
(b) Check the hoses for cracks, kinks, rot or loose connections.
5. BATTERY ELECTROLYTE LEVEL

Check the indicator.

When the indicator color is blue, the condition is satisfactory. A red color indicates that distilled water
must be added, and white indicates that charging is necessary.
6. BRAKE FLUID LEVELS
Check that the brake fluid level is near the upper level line on the see-through reservoir.
(See page BR-4)
7. ENGINE DRIVE BELTS
Check drive belt for fraying, cracks, wear or oiliness.
8. ENGINE OIL LEVEL
Check the level on the dipstick with the engine turned off.
9. POWER STEERING FLUID LEVEL

Check the level on the dipstick.

The level should be in the ºHOTº or ºCOLDº range depending on the fluid temperature.
10. AUTOMATIC TRANSMISSION FLUID LEVEL
Visually check the overflow plug and oil pan for fluid leaks or traces of fluid.

SF0PN-1 1
B16453
V-Bank Cover
PS Air Hose
Air Inlet Hose for EVAP
PCV Hose
Intake Air Connector

Gasket ECT Sensor
Connector
ECT Sensor
N´m (kgf´cm, ft´lbf) : Specified torque
18 (185, 13)

Gasket

Non-reusable part
Vacuum Sensing Hose
Fuel Return Hose
Water Bypass Hose
Throttle Control Connector
Throttle BodyWater Bypass Hose
PCV Hose
- SFIENGINE COOLANT TEMPERATURE (ECT) SENSOR
SF-49
1748 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
COMPONENTS

SF0PO-17
B02308
S01196S01699Z17274
Ohmmeter
Resistance kW
Temperature °C (°F) Acceptable 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
40 -20 0 20 60 80 100
(212) (176) (140) (104) (68) (32) (-4)
SF-50
- SFIENGINE COOLANT TEMPERATURE (ECT) SENSOR
1749 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE V-BANK COVER
3. REMOVE INTAKE AIR CONNECTOR
4. DISCONNECT THROTTLE BODY FROM INTAKE MAN-
IFOLDS (See page SF-36)
5. REMOVE ECT SENSOR
(a) Disconnect the ECT sensor connector.
(b) Remove the ECT sensor and the gasket.
6. INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the graph
If the resistance is not as specified, replace the ECT sensor.
7. REINSTALL ECT SENSOR
(a) Install a new gasket and the ECT sensor.
Torque: 20.4 N´m (208 kgf´cm, 15 ft´lbf)
(b) Connect the ECT sensor connector.
8. REINSTALL THROTTLE BODY TO INTAKE MAN-
IFOLDS
Install a new gasket and the throttle body with the 2 bolts and
2 nuts.
Torque: 18 N´m (185 kgf´cm, 13 ft´lbf)
9. REINSTALL INTAKE AIR CONNECTOR
10. REFILL WITH ENGINE COOLANT (See page CO-2)
11. REINSTALL V-BANK COVER