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ELFORUM - Forumul electronistilor

Sfat modificare semnal trimis de un senzor


Guest superalfi

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Guest superalfi

salut!am si eu nevoie de ajutorul vostru ca nu ma pricep la electronica prea mult.Iata despre ce e vorba:am un senzor la masina ca trimite un anumit semnal (vezi mai jos valorile) catre un modul electronic. Trebuie sa il pacalesc sa imi trimita semnalul care vreau eu daca actionez un buton pe care vreau sa il instalez in masina.Am gasit solutia sa pacalesc sistemul dar am nevoie de input-ul cuiva care se pricepe la electronica sa ma ajute.Iata datele:senzorul de la cutia de transfer care citeste pozitia ei transmite datele la un modul TIPM - are 5 pozitii si 5 tipuri de semnal diferite -eu vreau sa fac un buton (impreuna cu ce mai este necesar) care atunci cand e pornit sa transmita semnalul de 4HI catre TIPM - cand butonul este oprit va transmite semnalul care il da cutia de transfer nealterat.Iata schema:POSITION SENSORDESCRIPTIONThe transfer case position sensor is an electronicdevice whose output can be interpreted to indicatethe transfer case’s current operating mode. The sensorconsists of a five position, resistive multiplexedcircuit which returns a specific resistance value tothe Powertrain Control Module (PCM) for each transfercase operating mode. The sensor is located on thetop of the transfer case, just left of the transfer casecenterline and rides against the sector plate roostercomb.The PCM supplies 5VDC (+/- 0.5V) to the sensorand monitors the return voltage to determine thesector plate, and therefore the transfer case, position.OPERATIONDuring normal vehicle operation, the PowertrainControl Module (PCM) monitors the transfer caseposition sensor return voltage to determine the operatingmode of the transfer case.Background: The Totally Integrated Power Module (TIPM) provides sensor ground to the transfer case and many other components. This is on pin 28 of connector C1. The transfer case switch then returns a MODE SENSOR SIGNAL back to the TIPM on pin 3 of connector C1 (Yellow/Light Green). This signal varies in resistance as follows: Operating Mode Versus Resistance SENSOR POSITION OPERATING MODE SENSOR RESISTANCE (ohms) Position/mode/ohms 1/2H/1124-1243 2/4H/650-719 - asta este semnalul pe care trebuie sa il trimit la TIPM in momentul in care am activat butonul din masina - indiferent de pozitia in care se afla cutia de transfer3/NEUTRAL/389-431 4/4L/199-2215/NOT USED/57-64 Multumesc!

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Guest superalfi

iata si poza de la TIPM si de la senzorul respectiv precum si o schema la care m-am gandit eumai trebuie partea de montaj care sa imi transforme semnalul in valoarea care o vreau eu de cca 700 ohmi - sau sa imi anuleze complet semnalul care il trimite atunci senzorul si sa trimita montajul respectiv un semnal de 700 ohmi

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