18.07.2018 21:15
Новые сенсоры идут в выключенном виде. Нужна процедура активации, разная для разных датчиков:
"In every sensor there is a lithium battery with an expected life of up to 10 years. In order to preserve the battery life some sensors on a stationary vehicle revert to a reduced activity mode. To further preserve the battery life when stored as a replacement part, the TPMS is put into a storage mode (in hibernation). Each manufacturer has a different way to bring the TPMS out of hibernation.
In some cases the sensor has further different modes of operation that also have to be configured:
TPMS sensors from Schrader Electronics are supplied as replacement parts in the off mode and are simply commissioned for vehicle use. An activation tool providing a 125 KHz transmission will initialize the TPM for vehicle use
TPMS sensors from Beru/Huf are supplied as replacement parts hibernated - Once pressurized over 25 PSI for a period of time they become operational
TPMS sensors from Continental are supplied in a number of modes depending on the source of supplier - They can be supplied in TEST MODE and once installed on a vehicle will drive into the correct mode - Alternatively they can be supplied in SHIP MODE in which case they require activation by a 125KHz modulated signal to put them into the correct mode
TPMS sensors from TRW are supplied as replacement parts in storage mode - To bring the sensor out of storage mode and to configure it for vehicle use requires a complex modulated 125KHz signal"
В общем, новый сенсор активируется в зависимости от производителя двумя способами: при давлении более 1,8 бар, либо при получении НЧ сигнала на частоте 125 кГц. С завода он идет в спящем режиме, для экономии батареи