Testing Brakes, Speedometer, Etc

WHEN TESTING BRAKES, SPEEDOMETER, ETC.
When carrying out any kind of servicing or testing on a Full-time 4WD with Vehicle Skid Control (VSC) & Traction Control (TRAC) system in which the front or rear wheels are to be rotated (braking test, speedometer test), be sure to observe the precautions given below.
Incorrect preparations or test procedures may cause danger as well as unsuccessful test results.
Before starting any such servicing or test, be sure to check the following items:
- Center differential mode position (FREE or LOCK)




- w/ Vehicle skid control (VSC) system:
Center differential switch and VSC OFF & Traction Control (TRAC) system
- Whether wheels should be touching ground or jacked up
- Transmission gear position (N position)
- Transfer gear position (H or L position)
- Maximum testing vehicle speed
- Maximum testing time


HINT:
w/o Vehicle skid control (VSC) system:
When the transfer select lever is put in "L" position, the center differential is put in LOCK condition regardless of the position of the center differential lock switch.




a. Using Braking Tester:
Measure by low-speed type (Vehicle Speed: Below 0.5 km/h or 0.3 mph) brake tester and observe the following instructions before performing the test.
1. Position the wheels to be tested (front or rear) on the tester.
2. Put the center differential in FREE position.
3. Prohibit the Vehicle Skid Control (VSC) & Traction Control (TRAC) system from the activation (See step 2.).
4. Shift the transmission shift lever to "N" position.


HINT: Do not forget to change the Vehicle Skid Control (VSC) & Traction Control (TRAC) system to operational condition. Check that the VSC warning indicator light goes off when restarting the engine.

b. Using Speedometer ester:
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 or jack them up.
3. Put the center differential in FREE position.
4. Prohibit the Vehicle Skid Control (VSC) & Traction Control (TRAC) system from the activation (See step 2.).
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 Skid Control (VSC) & Traction Control (TRAC) system to operational condition. Check that the VSC warning indicator light goes off when restarting the engine.





c. Using Chassis Dynamometer:
Observe the following instructions and then measure with the rear wheels.
1. Remove the front propeller shaft.
2. Put the center differential in LOCK position.
3. Prohibit the Vehicle Skid Control (VSC) & Traction Control (TRAC) system from the activation (See step 2.).
4. Ensure that the vehicle is securely fixed.


HINT:
- Sudden shifting, braking, acceleration or deceleration is not allowed.
- Do not forget to change the Vehicle Skid Control (VSC) & Traction Control (TRAC) system to operational condition. Check that the VSC warning indicator light goes off when restarting the engine.




d. On-Vehicle Wheel Balancing:
When doing on-vehicle wheel balancing on a full-time 4WD vehicle, to prevent each wheel from being rotated at different speed in different directions (which could damage the center differential), always be sure to observe the following precautions.
1. All of 4 wheels should be jacked up, being apart from the ground completely.
2. Put the center differential in LOCK position.
3. Prohibit the Vehicle Skid Control (VSC) & Traction Control (TRAC) system from the activation (See step 2.).
4. The parking brake lever should be fully released.
5. None of the brakes should be applied.
6. The wheels should be driven on the wheel balancer with the engine running.
7. Carry out the wheel balancing with the transmission position in D.


HINT:
- When doing this balancing, pay attention to the other wheels rotating at the same time.
- Sudden acceleration, deceleration or braking is not allowed.
- Do not forget to change the Vehicle Skid Control (VSC) & Traction Control (TRAC) system to operational condition. Check that the VSC warning indicator light goes off when restarting the engine.