4WD (Four-wheel Drive) Model Precautions

This 4WD model does not have the feature that mechanically switches between 4WD and 2WD (front-wheel drive). Therefore, speedometer testing should be conducted using simplified free rollers under the rear wheels.

Precautions on using free rollers:


  • Inspecting and testing using a chassis dynamometer is not feasible.
  • Do not operate the accelerator pedal, brake pedal or steering wheel abruptly. It may cause the vehicle to roll and create a hazardous condition.
  • The maximum testing speed should be 50 km/h (31 mph).
  • The maximum continuous operating time should be three minutes.
  • Make sure to tie down the vehicle securely with the side anchor wires and center tie down wire. The free rollers are to be set under the rear wheels.



  • Make sure to place the free rollers parallel to the roller of each speedometer tester.
  • Putting the front and rear wheels on the speedometer testers and free rollers inappropriately may cause the vehicle to roll off or over the free rollers and create a hazardous condition.
  • The side anchor wires and certain tie-down wire must be appropriately tensioned. If the wires have too much slack, the expected tie-down efficiency cannot be obtained.
  • When attaching the side anchor wires and center tie-down wire, make sure they are not interfering with the bumper and other parts of the vehicle body.
  • Do not attach the wires to any place other than the designed areas.
  • Do not a operate the speedometer testers at a speed more than 50 km/h (31 mph) or for more than three minutes.

Testing Procedures


1.Set the free rollers according to the wheel base and tread of the vehicle.

 

2.Move the vehicle to position the front wheels on the speedometer testers and the rear wheels on the free rollers. Make sure to align the center of the wheels to the center of the speedometer testers and the free rollers.

 

3.Tie down the vehicle securely using the towing hook and the rear tie-down hook bracket to prevent the vehicle from rolling off or over the free rollers.

4.Start the engine, shift the transmission to 3rd gear, accelerate the vehicle gradually, and measure the vehicle speed.

5.After measurement, use the brake pedal to gradually decelerate and stop the vehicle.