Tire Location
Because of the requirement for different pressure targets and thresholds for the front and rear tires, the Tire Pressure Monitoring System (TPMS) can identify the location of the tires on the vehicle. The TPMS system then assigns received tire pressure sensor identification to a specific position on the vehicle. For example: front left, front right, rear left or rear right.
Tire location is performed automatically by the TPMS using an auto location function. This function requires no manual intervention by the driver. The TPMS can automatically learn the position of tires on the vehicle if the tire pressure sensors or their positions are changed on the vehicle.
The tire learn and location process is ready to commence when the vehicle has been stationary or is travelling at less than 12.5 mph (20 km/h) for 15 minutes. This is known as 'Parking mode'. The learn/locate process requires the vehicle to be driven at speeds of more than 12.5 mph (20 km/h) for 15 minutes. If the vehicle speed reduces to below 12.5 mph (20 km/h), the learn process timer is suspended until the vehicle speed increases to more than 12.5 mph (20 km/h), after which time the timer is resumed. If the vehicle speed remains below 12.5 mph (20 km/h) for more than 15 minutes, the timer is set to zero and process starts again.
The TPMS can automatically detect, under all operating conditions, the following:
- One or more tire pressure sensors have been replaced.
- One or more tire pressure sensor identifications are missing.
- One or more 'alien' identifications are being received; the TPMS will reject these signals.
- Identifications from tire pressure sensors that do not belong to the vehicle.
- One of the tires in use on the vehicle have exchanged position on the vehicle.
- One or more incompatible tire pressure sensors have been fitted.
If the tire pressure sensors fitted to the running wheels are changed, the TPMS can learn the new sensor identifications automatically. The learn function requires no manual intervention by the driver.
- The TPMS tire valve should be serviced using the suitable service kit (C2D 29157 or LR043163), each time the tire is dismounted, to ensure an air tight seal. Attention should be made to the detail of fitting this kit.
- Care must be taken when removing and refitting tires to ensure that the tire pressure sensor is not damaged.