Part 2

INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PRECAUTION (Continued)

3. ELECTRONIC CONTROL





(a) REMOVAL AND INSTALLATION OF BATTERY CABLE
(1) Before performing electronic work, disconnect the cable from the negative (-) battery terminal to prevent component and wire damage caused by accidental short circuits.
(2) When disconnecting the cable, turn the engine switch off and headlight dimmer switch off and loosen the cable nut completely. Perform these operations without twisting or prying the cable. Then disconnect the cable.
(3) Clock settings*, radio settings, audio system memory, DTCs and other data are cleared when the cable is disconnected from the negative (-) battery terminal. Write down any necessary data before disconnecting the cable.
Hint: *: w/o Multi-display
(4) Certain systems need to be initialized after disconnecting and reconnecting the cable to the negative (-) battery terminal.

(b) HANDLING OF ELECTRONIC PARTS




(1) Do not open the cover or case of an ECU unless absolutely necessary. If the IC terminals are touched, the IC may be rendered inoperative by static electricity.
(2) Do not pull the wires when disconnecting electronic connectors. Pull the connector.
(3) Be careful not to drop electronic components, such as sensors or relays. If they are dropped on a hard surface, they should be replaced.
(4) When cleaning the engine with steam, protect the electronic components, air filter and emissions-related components from water.
(5) Never use an impact wrench to remove or install temperature switches or temperature sensors.
(6) When measuring the resistance of a wire connector, insert the tester probe carefully to prevent the terminals from bending.
4. REMOVAL AND INSTALLATION OF FUEL CONTROL PARTS
(a) PLACE FOR REMOVING AND INSTALLING FUEL SYSTEM PARTS
(1) Work in a location with good air ventilation that does not have welders, grinders, drills, electric motors, stoves, or any other ignition sources.
(2) Never work in a pit or near a pit as vaporized fuel will collect in those places.
(b) REMOVING AND INSTALLING FUEL SYSTEM PARTS
(1) Prepare a fire extinguisher before starting the operation.
(2) To prevent static electricity, install a ground wire to the fuel changer, vehicle and fuel tank, and do not spray the surrounding area with water. Be careful when performing work in this area, as the work surface will become slippery. Do not clean up gasoline spills with water, as this may cause the gasoline to spread, and possibly create a fire hazard.
(3) Avoid using electric motors, working lights and other electric equipment that can cause sparks or high temperatures.
(4) Avoid using iron hammers as they may create sparks.
(5) Dispose of fuel-contaminated cloths separately using a fire resistant container.
5. REMOVAL AND INSTALLATION OF ENGINE INTAKE PARTS





(a) If any metal particles enter inlet system parts, they may damage the engine.

(b) When removing and installing inlet system parts, cover the openings of the removed parts and engine openings. Use gummed tape or other suitable materials.
(c) When installing inlet system parts, check that no metal particles have entered the engine or the installed parts.





6. HANDLING OF HOSE CLAMPS
(a) Before removing the hose, check the clamp position so that it can be reinstalled in the same position.
(b) Replace any deformed or dented clamps with new ones.
(c) When reusing a hose, attach the clamp on the clamp track portion of the hose.
(d) For a spring type clamp, you may want to spread the tabs slightly after installation by pushing in the direction of the arrows as shown in the illustration.

7. FOR VEHICLES EQUIPPED WITH MOBILE COMMUNICATION SYSTEMS





(a) Install the antenna as far away from the ECU and sensors of the vehicle electronic systems as possible.

(b) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle electronic systems. For details about ECU and sensor locations, refer to the section of the applicable components.
(c) Keep the antenna and feeder separate from other wiring as much as possible. This will prevent signals from the communication equipment from affecting vehicle equipment and vice versa.
(d) Check that the antenna and feeder are correctly adjusted.
(e) Do not install a high-powered mobile communication system.
8. WHEN INSPECTING HEADLIGHT





(a) When the headlights are illuminated, do not cover the headlights for 3 minutes or more.
NOTE: As the outer lens is of the headlight made of resin, the resulting heat created when covering the headlight for an extended period of time may deform the headlight.

9. WHEN SERVICING FULL-TIME 4WD VEHICLES





(a) The full-time 4WD LAND CRUISER is equipped with a mechanical lock type center differential system.





(b) During tests that require the use of a brake tester or chassis dynamometer, such as braking force tests or speedometer tests, if only the front or rear wheels are to be rotated, it is necessary to set the center differential to lock or free depending on the type of test being performed.









CAUTION: Center differential lock --> free selecting procedures:
- Operate the switch only when all 4 wheels are stopped or driving in a straight line.
- Never operate the switch when any wheel is slipping.
- Never operate the switch when any wheel is spinning freely.
- Never operate the switch when swerving or cornering.

10. WHEN TESTING BRAKES, SPEEDOMETER, ETC.





(a) When carrying out any kind of servicing or testing on a Full-time 4WD with Active Traction Control System & Vehicle Stability Control (VSC) System in which the front or rear wheels are to be rotated (braking test, speedometer test), be sure to observe the precautions listed below.
Incorrect preparations or test procedures may cause damage as well as unsuccessful test results.

(b) Before starting any such servicing or test, be sure to check the following items:
- Enter test mode using the Techstream Test Mode Procedure.
- The center differential (lock or free)
- Whether wheels should be touching the ground or jacked up
- Transmission gear position (N position)
- 4WD control switch (H4 or L4 position)
- Maximum testing vehicle speed
- Maximum testing time
CAUTION:
- Inspection should be done on the rear wheels.
- Do not start, accelerate or decelerate the vehicle suddenly.
- Maximum vehicle speed must be below 60 km/h (37 mph) (when using a free roller, it must be below 50 km/h (31 mph)).
NOTICE:
- A tester with a load setting function for only two wheels cannot be used.
- The driving time should be less than 1 minute.

(c) When using a braking force tester (not free roller type):
When performing measurements using a low-speed type brake tester, observe the following instructions.








(1) Enter test mode using the Techstream Test Mode Procedure.
(2) Turn the center differential to free.
(3) Position the rear wheels on the tester.
(4) Jack up the front wheels.
(5) Ensure that the vehicle does not move using wires.
(6) Move the transmission shift lever to N.
(7) Idle the engine, operate the brake booster and perform the test.
CAUTION: If the vehicle is tested in normal mode on the drum tester, VSC operation may cause the vehicle to jump out from the drum tester.
NOTICE:
- The maximum driving time should be 1 minute.
- Do not forget to change the VSC to the operational condition after the test.

(d) When using a braking force tester (free roller type):
When performing measurements using a low-speed type brake tester, observe the following instructions.








(1) Enter test mode using the Techstream Test Mode Procedure.
(2) Turn the center differential to free.
(3) Position the rear wheels on the tester roller.
(4) Position the front wheels on the free roller.
(5) Ensure that the vehicle does not move using wires.
(6) Move the transmission shift lever to N.
(7) Idle the engine, operate the brake booster and perform the test.
CAUTION: If the vehicle is tested in normal mode on the drum tester, VSC operation may cause the vehicle to jump out from the drum tester.
NOTICE:
- The maximum driving time should be 1 minute.
- Do not forget to change the VSC to the operational condition after the test.

(e) When using a speedometer (not free roller type):
Observe the following instructions and then measure with the rear wheels.








(1) Enter test mode using the Techstream Test Mode Procedure.
(2) Turn the center differential to lock.
(3) Position the rear wheels on the tester.
(4) Jack up the front wheels.
(5) Ensure that the vehicle does not move using wires.
(6) Move the transmission shift lever to D.
CAUTION: If the vehicle is tested in normal mode on the drum tester, VSC operation may cause the vehicle to jump out from the drum tester.
NOTICE:
- The maximum speed should be less than 50 km/h (31 mph).
- If the measurement must be made while the vehicle speed is over 50 km/h (31 mph), remove the front propeller shaft.
- Do not forget to change the VSC to the operational condition and the center differential to free condition after the test.

(f) When using a speedometer (free roller type):
Observe the following instructions and then measure with the rear wheels.








(1) Enter test mode using the Techstream Test Mode Procedure.
(2) Turn the center differential to lock.
(3) Position the rear wheels on the tester roller.
(4) Position the front wheels on the free roller.
(5) Ensure that the vehicle does not move using wires.
(6) Shift the transmission shift lever to D.
CAUTION: If the vehicle is tested in normal mode on the drum tester, VSC operation may cause the vehicle to jump out from the drum tester.
NOTICE:
- The maximum speed should be less than 50 km/h (31 mph).
- If the measurement must be made while the vehicle speed is over 50 km/h (31 mph), remove the front propeller shaft.
- Do not forget to change the VSC to the operational condition and the center differential to free condition after the test.





(g) Using a chassis dynamometer.
NOTE: If you do not observe the following conditions for the test, there will be cases where the 4WD functions will deteriorate, the parts in the drive-train system will have a malfunction, or the vehicle will jump out. Therefore, do not conduct a test unless observing the following conditions.
Hint: When conducting a test with the vehicle highly loaded are driven at high speeds, observe the following:





NOTICE
- Do not suddenly accelerate and do not suddenly apply the brakes.
- Confirm that the vehicle is securely immobilized.

11. FOR VEHICLES EQUIPPED WITH CATALYTIC CONVERTER
CAUTION: If a large amount of unburned gasoline or gasoline vapors flow into the converter, it may cause overheating and create a fire hazard. To prevent this, observe the following precautions.

(a) Use only unleaded gasoline.
(b) Avoid idling the engine for more than 20 minutes.
(c) When performing spark jump tests:
(1) Perform a spark jump test only when absolutely necessary. Perform this test as rapidly as possible.
(2) While testing, never race the engine.
(d) Avoid a prolonged engine compression measurement. Engine compression measurements must be performed as rapidly as possible.
(e) Do not run the engine when the fuel tank is nearly empty. This may cause the engine to misfire and create an extra load on the converter.
12. WHEN TOWING FULL-TIME 4WD VEHICLES
(a) Use one of the methods shown below to tow the vehicle.
(1) If the vehicle has trouble in the chassis and drive train, use method 1 (flat bed truck).





NOTE: Do not use any towing method other than those shown above.
(2) For example, the towing methods shown below are dangerous or may damage the vehicle, so do not use them.