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Sono i sensori dell'air bag che lavorano facendo contatto sul frame,le 90' hanno un problema di corrosione tra telaio e sensore che provoca il rilascio del codice di errore,la soluzione e' quella di staccare la batteria,pulire con carta abrasiva fine i sensori dx e sx e le porzioni di telaio e spalmare grasso per batteria per mantenere il contatto ,se te la cavi con l'inglese ecco gli americani:
According to Gordon Killebrew, "If fault codes 15,16,25 or 26 are set, refer to GM bulletin 90-436-9J. There may be corrosion between the right or left uniframe impact sensors and the uniframe." So if you clean the sensors and the frame like I suggest and reset the light you should have no more problems. Of course there is a possibilty it could be a bad sensor, but more than likely it will be a bad ground(the sensor to the frame).
The fix is to remove the sensors and clean up the tab and frame area and apply some di-electric grease and use star washers on the remount.
La procedura di reset del codice dalla centralina e' piu' laboriosa.
To do this I used the grounding plug for the airbag and plugged it in to the ALDL with the car off. Then I turned the car on(not starting), waited for the airbag light to start blinking.As soon as it does remove the plug and count 1001,1002,1003 and plug back in and then unplug and count 1001,1002,1003 and plug in.I did this about 3 or 4 times. Then turn off ignition, unplug ground plug and start car. The airbag light should come on for a few seconds and then go out. If not then try the reset procedure again. The tech procedure on the forum tells you how to reset with a wire which will do the same thing. Or you can use the switch one from Mid America or where ever and reset it with that. I personally like Gordons ground plugs cause they are simple and you can use them whenever you have any other fault lights come on. Hope this helps. It took myself and a friend about two hours to do this, with less info than what I'm writing here
Il codice in questione e' relativo a questi due sensori,i post riportati vengono da questo forum
