Part 4
INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION
10. WHEN SERVICING FULL-TIME 4WD VEHICLES
(a) (a) The full-time 4WD LEXUS IS250/350 is equipped with the four wheel drive control system.
If incorrect preparations or test procedures are used, the test will not only be unsuccessful, but may be dangerous as well.
Therefore, before beginning any such servicing or test, be sure to check the following items:
(1) Whether the tires are touching the ground or jacked up
(2) Transmission gear position
(3) Maximum testing vehicle speed
(4) Maximum testing time
CAUTION:
* Never accelerate or decelerate the vehicle suddenly
* Observe the other cautions given for each individual test.
(b) Using Braking Force Tester (Vehicle Speed: Below 0.5 km/h (0.3 mph))
When performing low-speed type brake tester measurements, observe the following instructions:
(1) Position the wheels to be tested (front or rear) on the tester.
(2) Shift the transmission shift lever to the "N" position.
(3) Enter inspection mode to disable TR(A)C and VSC control.
(4) Idle the engine, operate the brake booster and perform the test.
(c) Using Speedometer Tester:
Observe the following instructions and then measure with the rear wheels.
(1) Position the rear wheels on the tester roller.
(2) Position the front wheels on the free roller of jack them up.
(3) Ensure that the vehicle does not move using wires.
(4) Enter inspection mode to disable TR(A)C and VSC control.
(5) Ensure that the vehicle does not move using wires.
CAUTION:
The maximum speed should be less than 60 km/h (37 mph) and maximum driving time should be 1 minute.
HINT
* Sudden shifting, braking, acceleration or deceleration is not allowed.
* Do not forget to change the Vehicle Stability Control (VSC) & Traction Control (TR(A)C) system to operational condition after the test. Check that the slip indicator light goes off when restarting the engine.
(d) Using Chassis Dynamometer
Observe the following instructions and then measure with the rear wheels.
(1) Enter inspection mode to disable TR(A)C and VSC control.
(2) Ensure that the vehicle is securely fixed.
HINT
* Sudden shifting, braking, acceleration or deceleration is not allowed.
* Do not forget to change the Vehicle Stability Control (VSC) & Traction Control (TR(A)C) system to operational condition after the test. Check that the slip indicator light goes off when restarting the engine.
(e) On-Vehicle Wheel Balancing:
NOTICE:
Do not use on-vehicle wheel balancing.
11. PRECAUTIONS FOR TOWING REAR WHEEL DRIVE VEHICLES
(a) Use one of the following methods to tow the vehicle.
(b) If the vehicle has trouble with the chassis or drivetrain, use method 1 (flatbed truck).
NOTICE:
Do not use any towing method other than those shown above.
(c) If a tow truck is not available, in an emergency the vehicle may be temporarily towed using a cable or chain secured to the emergency towing eyelet(s). This should only be attempted on hard surfaced roads for distances of less than 80 km, and at speeds below 30 km/h (19 mph).
A driver must be in the vehicle to steer and operate the brakes. The vehicle's wheels, drivetrain, axles, steering and brakes must be in good condition.
NOTICE:
If the towing speed or distance exceeds the above limits, or the vehicle is towed in a backward direction with the wheels on the ground, the drivetrain or vehicle may be damaged.
(1) Emergency towing procedure
1 Turn the engine switch on (IG).
2 Depress the brake pedal and move the shift lever to N.
3 Release the parking brake.
4 Release the brake pedal slowly.
NOTICE:
* Use extreme caution when towing the vehicle. Avoid sudden starts or erratic driving maneuvers which place excessive stress on the emergency towing eyelet and the cables or chains.
* Do not turn off the engine switch. Turning off the engine switch may result in engagement of the steering lock, resulting in a hazardous situation or accident.
(d) The towing methods shown below are dangerous and can damage the vehicle, so do not use them.
(1) Do not tow the vehicle with only 2 wheels on the ground.
CAUTION:
If the vehicle is towed with only the front wheels on the ground, the steering may move, causing the vehicle to become unstable.
NOTICE:
If the vehicle is towed with only the rear wheels on the ground, the drivetrain may overheat and be damaged.
(2) Do not use a sling-type towing method either from the front or rear.
NOTICE:
If a sling-type tow truck is used, damage may occur to the vehicle body.
12. PRECAUTIONS FOR TOWING ALL WHEEL DRIVE VEHICLES
(a) Use one of the following methods to tow the vehicle.
(b) If the vehicle has trouble with the chassis or drivetrain, use method 1 (flatbed truck).
NOTICE:
Do not use any towing method other than those shown above.
(c) If a tow truck is not available, in an emergency the vehicle may be temporarily towed using a cable or chain secured to the emergency towing eyelet(s). This should only be attempted on hard surfaced roads for distances of less than 80 km, and at speeds below 30 km/h (19 mph).
A driver must be in the vehicle to steer and operate the brakes. The vehicle's wheels, drivetrain, axles, steering and brakes must be in good condition.
NOTICE:
If the towing speed or distance exceeds the above limits, or the vehicle is towed in a backward direction with any of the wheels on the ground, the drivetrain may be damaged.
(1) Emergency towing procedure
1 Turn the engine switch on (IG).
2 Depress the brake pedal and move the shift lever to N.
3 Release the parking brake.
4 Release the brake pedal slowly.
NOTICE:
* Use extreme caution when towing the vehicle. Avoid sudden starts or erratic driving maneuvers which place excessive stress on the emergency towing eyelet and the cables or chains.
* Do not turn off the engine switch. Turning off the engine switch may result in engagement of the steering lock, resulting in a hazardous situation or accident.
(d) The towing methods shown below are dangerous and can damage the vehicle, so do not use them.
(1) Do not tow the vehicle with only two wheels on the ground.
NOTICE:
If the vehicle is towed with only 2 wheels on the ground, the drivetrain may overheat and be damaged, or the wheels may come off the dollies.
(2) Do not use a sling-type towing method either from the front or rear.
NOTICE:
If a sling-type tow truck is used, damage may occur to the vehicle body.
13. 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) Avoid performing unnecessary 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.
14. INSPECTION AND ADJUSTMENT OF JOINT ANGLE DURING REMOVAL AND INSTALLATION OF PROPELLER SHAFT
(a) When performing operations which involve the removal and installation of the propeller shaft, always check the joint angle. Make adjustments if necessary Installation.
(b) When performing operations which involve the removal and installation of the propeller shaft, always check the joint angle. Make adjustments if necessary Installation.
(c) When performing operations which involve the removal and installation of the propeller shaft, always check the joint angle. Make adjustments if necessary Installation.
