When Servicing Full-Time AWD Vehicles

WHEN SERVICING FULL-TIME AWD VEHICLES

a. The full-time AWD LEXUS GS350 is equipped with the All-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. 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. To disable the AWD system, short terminals OPA and CG of the DLC3.
2. If the vehicle is equipped with the Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from activating.

3. Position the rear wheels to be tested on the tester.
4. Position the front wheels between wheel chocks, or jack up the front wheels.
5. Shift the transmission shift lever to the "N" position.
6. Idle the engine, operate the brake booster and perform the test.

c. When using a braking force tester (free roller type):
When performing measurements using a low-speed type brake tester, observe the following instructions.
1. If the vehicle is equipped with the Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from the activating.
2. Position the rear wheels on the tester roller.
3. Position the front wheels on the free roller.

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.
- Make sure to activate 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. When using a speedometer (not free roller type):
Observe the following instructions and then measure with the rear wheels.

3. Position the rear wheels on the tester.
4. Position the front wheels between wheel chocks, or jack up the front wheels.
5. Ensure that the vehicle does not move using wires.
6. Shift the transmission shift lever to the "N" position.
7. Idle the engine, operate the brake booster and perform the test.

e. When using a speedometer (free roller type):
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.
3. Ensure that the vehicle does not move using wires.
4. If the vehicle is equipped with the Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from the activating.
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.
- Make sure to activate the Vehicle Stability Control (VSC) & Traction Control (TRAC) system after the test. Check that the VSC warning indicator light goes off when restarting the engine.

f. Using chassis dynamometer Observe the following instructions and then measure with the rear wheels.
1. If the vehicle is equipped with the Vehicle Stability Control (VSC) & Traction Control (TRAC) system, prohibit the system from the activating.
2. Ensure that the vehicle is securely fixed.

HINT:
- Sudden shifting, braking, acceleration or deceleration is not allowed.
- Make sure to activate the Vehicle Stability Control (VSC) & Traction Control (TRAC) system after the test. Check that the VSC warning indicator light goes off when restarting the engine.

g. On-vehicle wheel balancing

NOTE: Do not use on-vehicle wheel balancing.