obd2lily

I recently got the new 17.2 software upgrade for my Snap-On scanner, also the shop I work for got the newest [URL="http://www.obd2tool.com/goods-5207-Autel+Maxisys+Elite+Diagnostic+Scanner.html"]Autel Maxisys Elite[/URL] scanner. I had a chance to play around with them this weekend on my truck. All of this info applies to my 2008 3rd gen.
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The newest Autel MaxiSys Elite. Choose “Hot Function”.
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Next choose “Tire Pressure”.
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The 3rd Gen has a heavy & light load TPMS settings and the Autel accommodates both settings where the Snap-On only gives you one setting.
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I set my heavy load limit to 40 PSI which should trigger the warning light at 34 PSI. Note that the adjustment limit is 28-80 PSI.
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After I reset the heavy load setting, I did the same for the light load setting and this was the final result.
NOTE: 28 PSI is the lowest possible setting available for my truck, with a 22 PSI warning light trigger threshold.
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Newest 17.2 software
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From the list of modules you can interface with choose the “TPM”.
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Then choose the “System Tests” option.

Showing minimum setting at 28 PSI and the 6 PSI threshold to trigger the warning light at 22 PSI.
Right now my tires are set to 35 PSI and I have no warning lights on. The only side effect so far is that when I push the “Light Load” button on my dashboard, the indicator light flashes and then turns off. Something is not happy with the changes I made. I’ll have to play around with it some more to see if I can get the indicator light to cooperate. All of this was accomplish without needing a dealer supplied 4 digit code. I assume thats just something required for the 4th gen trucks.