When Servicing Full-Time 4WD Vehicles

WHEN SERVICING FULL-TIME 4WD VEHICLES

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. If the vehicle is equipped with Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from the activation.
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. If the vehicle is equipped with Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from the activation.
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 (TRAC) system to operational condition after the test. Check that the VSC warning indicator light goes off when restarting the engine.

d. Using Chassis Dynamometer
Observe the following instructions and then measure with the rear wheels.




1. If the vehicle is equipped with Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from the activation.
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 (TRAC) system to operational condition after the test. Check that the VSC warning indicator light goes off when restarting the engine.

e. On-Vehicle Wheel Balancing:

NOTE: Do not use on-vehicle wheel balancing.