The TPMS system uses active tire pressure sensors installed inside the tire of each wheel. The sensor includes a tire valve and is secured to the wheel with a nut on the outside of the wheel. The sensor contains a printed circuit board with a PTC sensor (RTS), piezo pressure transducer, radio receiver and radio transmitter and lithium battery.
Tire pressure sensors use a PTC sensor and a piezo sensor to periodically measure the pressure and temperature of the air inside a tire. Data is transmitted by high frequency signals - 315 or 433 MHz, depending on market requirements.
The data transmitted from the sensor by high-frequency signals contains a unique identification code. This allows the TPMS to recognize the wheels on the vehicle. If the sensor is replaced with "working" wheel, the identification data of the new sensor will be obtained after driving for more than 15 minutes at a speed exceeding 20 km/h.
When a new sensor is installed on the spare wheel, its identification information can be programmed into the TPMS using the IDS. On a new wheel rim assembly with tire and sensor, the code is indicated on the label. It is also printed on the packaging of each sensor. In addition, it is possible to program the spare wheel data into the TPMS if it is used as a "working" when driving for 15 minutes at a speed exceeding 20 km/h. After that, the wheel must be removed and installed in place of the spare wheel.
The tire pressure sensor can also detect wheel rotation. To prevent battery discharge, the sensor uses a different baud rate when the vehicle is stationary and when the vehicle is moving. To switch from a slow gear to a fast one, a very low wheel speed is sufficient, which is important when driving slowly off-road.
To avoid damage to the sensor, the precautions detailed in this section in paragraph "Tire replacement". When installing a new sensor, the nut, seal, and washer must also be replaced, and the sensor nut must be tightened to the specified torque specified in the Repair Manual.
Tire pressure sensor (Freelander 2)
This article is available at russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
Previous articles
Current article
Tire pressure sensor
Next articles
Similar articles from Land Rover repair manuals:
• Low tire pressure sensor Discovery 3 (2004-2009)
• Tire pressure monitoring (TPM) sensor Range Rover 3 (2001-2012)
• Tire pressure, condition and tread depth Defender 2007+ (2007-2016)
• Low tire pressure sensor Discovery 3 (2004-2009)
• Tire pressure monitoring (TPM) sensor Range Rover 3 (2001-2012)
• Tire pressure, condition and tread depth Defender 2007+ (2007-2016)
No comments yet
Comments on this article