[Gmecm] GMECM MAT calibration

[Rob Handley]

Many thanks! For some reason I hadn't thought to overlay the CTS and MAT 
plots, but they are indeed a good match! This means that it should be easy 
to add the extra code in the ECM to use the CTS lookup array to compute MAT 
temperature! :-)

Thanks also for the part info which immediately led me to here: 
http://inpcars.com/ambient-air-temperature/7.html.

Interestingly, my Vauxhall (GM) CTS (that I'm using with a GMECM) looks 
exactly like the Beck Arnley 158-0134.

Since I have a spare one of those, I'm now wondering whether I can cut away 
some of the brass to expose the thyrister - making it suitable as a MAT 
sensor... :-) (I had thought that I could just take a MAT sensor from a 
Vauxhall, but it turned out to be Bosch and with a totally different 
calibration from the GM ones!)

BR,

Rob

----- Original Message ----- 
From: <md4etal at netzero.net>
To: <gmecm at diy-efi.org>
Sent: 05 August 2007 16:13
Subject: Re: [Gmecm] GMECM MAT calibration


The sensors are available from Standard Motor Parts number AX3.  This 
thermistor is very, very close to the coolant temperature sensor.
Hope this helps.
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