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IAT and CLT fixed values
Posted: Tue Sep 01, 2009 5:25 am
by 77e21turbo
After a 12v on vref circuit replaced D19 everything seamed to work ok but I noticed IAT stuck at 70 deg and CLT at 180 default. I checked all the resistors and capacitors their all ok. Their is 5v on pin 20 and 21 . sensors and wireharness on vehicle check out ok. I'm thinking something else got zapped with the 12v. If anyone has any ideas or has had this problem please let me know Thanks Jared ms2 3.0
Re: IAT and CLT fixed values
Posted: Tue Sep 01, 2009 7:04 am
by Matt Cramer
Do you have this problem just on the vehicle, or is it also an issue on the Stim?
Re: IAT and CLT fixed values
Posted: Tue Sep 01, 2009 9:03 am
by 77e21turbo
I don't have a stim to use as a diag aid
Re: IAT and CLT fixed values
Posted: Tue Sep 01, 2009 11:11 am
by Matt Cramer
A Stim would really help, but you can try backprobing the sensors on the wire that goes to the MS and check the voltages there.
Re: IAT and CLT fixed values
Posted: Tue Sep 01, 2009 11:28 am
by 77e21turbo
Thats what I will do tonight. but I think the processor could be damaged from 12v but TPS works ok
Re: IAT and CLT fixed values
Posted: Tue Sep 01, 2009 3:09 pm
by 77e21turbo
Checked both circuits unplugged has vref 5v plug in thermistors and drops down to 4.11 volts but does not change on megasquirt also recalibrated thermistors still no change problem has to be within megasquirt.processor?
Re: IAT and CLT fixed values
Posted: Wed Sep 02, 2009 5:29 am
by Matt Cramer
You could try reloading the code.
Re: IAT and CLT fixed values
Posted: Wed Sep 02, 2009 5:53 am
by 77e21turbo
That was the first thing that was done but i'm ready to try it again