I have a 2005 Hyundai Elantra GLS. My airbag light has been turning on and off intermittently at first, but now pretty constant. I took it to a dealership and they scanned the SRS system and said the code pointed to the weight sensor in the passnger seat. I went to a salvage yard and picked up a used sensor of the same exact model. I installed it in my vehicle and the airbag light is still on and acting same as before. I decided to test the weight sensor. It's nothing more than two magnets separated by a gap. As the seat (or other magnetic metal) slides between the gap the resistance increases from about 500ohms to 1Kohm. Both the original and salvage yard sensor yealded the exact same results when tested. So my understanding of the sensor it to vary the voltage on the line by adjusting the resistance of the sensor. My next thought was to measure the voltage at the 2 pins from the connector that plugs into the sensor. I measured abot .5 volts across the two pins.
I want to know what the measured voltage should be, or if it is supposed to be tested from a reference point to each pin, or if testing across the two pins is correct. The other option I am considering is bypassing the weight sensor and keeping the airbag on regardless of passenger or not. No children ride in the front seat. Any suggestions would be great. Thank you very much in advance.