Do anyone knows which reistance of heater is on oem wideband a/f sensor ?
On non wideband it is 2.1-2.9 Ohm, if some one have a working oem wideband a/f sensor, measure the resistance between black wires.
Air/Fuel sensor heater resistance
I measured about 1 ohm when cold, but it goes up quickly as it gets hot. Said another way, it does not draw 12V / 1 ohm - 12 amps!
Mid-engine K24 turbo Locost, http://www.midlana.com
Ou. So it seems that my a/f sensor is o.k., cause i have a new one and measured the resistance in a room temperature, and it is 1ohm....kb58 wrote:I measured about 1 ohm when cold, but it goes up quickly as it gets hot.
I can not figure out what do you mean by last words: "it does not draw "...kb58 wrote: Said another way, it does not draw 12V / 1 ohm - 12 amps!
I mean it's only 1 ohm at room temperature. As it heats up, its resistance goes up, too. If you apply 12V to the heater wires for just a second (it gets hot really fast, so be careful) and measure the resistance, it'll be much higher. So at that higher temperature and resistance, it no longer draws as much current as it did at room temp, that's all.
Mid-engine K24 turbo Locost, http://www.midlana.com