Initialization

INITIALIZATION




The RDW system must be initialized to allow the control module to adopt the wheel speed signals and set the rolling circumferences in its memory. Initialization must be carried out when:
- Tire inflation pressures are changed.
- New tires are installed.
- The control module or wheel speed sensors are changed.

The initialization process is started by pressing the push button > 4 seconds (Tire Pressure Set will be displayed in the matrix). The system is now in the learn mode and after driving off, the control module will start to store the values for the rolling circumferences of the tires based on the road speed.

For leakage detection, three different speed ranges are taken into account and must be recognized by the control module to complete a full initialization process. The control module must receive useable speed signals for a cumulative total of 4 to 15 minutes depending on the speed range.

Once a speed range is set, the control module will then monitor that speed range for and pressure losses. The system can only display a pressure loss warning, it can not display the exact tire with the pressure loss. All tires need to be checked when the warning is displayed in the matrix.

NOTE: Not all speed ranges need be set for the system to function properly.

Under certain driving conditions the control module will not evaluate the wheel speed sensors as false warnings could be triggered. These conditions include:
- Initialization in a speed range that has not been complete.
- During rapid acceleration.
- Severe (heavy) braking.
- High speed cornering.
- Road speeds < 7 MPH
- High slip differentials between individual wheels.

NO WARNING CONDITIONS




The system can only detect pressure differences between tires, it can not measure absolute pressure. The system can not detect the following:
- Natural diffusion that occurs on all tires equally.
- A tire blow out.
- Pressure loss at the rear axle at speeds > 90 MPH