IAT voltage scaling

[killerbee]

Hello again.

Would it be possible to get the 5V voltage scaling for IAT?

Any one know which wire carries the IAT signal?

:help2:

[sweetdiesel]

Hello again.

Would it be possible to get the 5V voltage scaling for IAT?

Any one know which wire carries the IAT signal?

:help2:


I should be able to get that for you in a couple days if you can wait

[killerbee]

I'm guessing it is on a notebook shelf down under. Trying not to do it the hard way

[GMPX]

Do you mean the scaling reported for the scantool, or, the scaling for the A/D input?

Cheers,
Ross

[killerbee]

I sent an email Ross. What I mean is voltage scaling, re 0V=xx degrees, 1V=xx degrees IAT, etc...

For example, MAF scaling is provided on the tuning tool. I am looking for those correlation relationship values for IAT, MAP, ECT, TPS, BARO, basically all the performance and monitoring sensors in both CAN and prior vehicles.

Not asking for much! :)

...and thanks in advance!!!!!

[GMPX]

To measure the IAT and ECT at the sensor is going to be tricky, because the ECM switches the series resistances for better scaling, what you will find is at 'x' temperature the voltage will go from say 0.2V back to 4V, whatever is monitoring the sensor will think the temp has all of a sudden gone from say 50degC to -50DegC when in fact it's really gone to 49DegC.....confused?
If you get it all from the Comms bus then you don't need to worry about any of that.

Cheers,
Ross