# how to do diag in a free way

**URL:** <https://forums.speedlife.net/t/how-to-do-diag-in-a-free-way/224234>\
**Category:** Canada Nissan Automotive\
**Created:** [June 29, 2012, 5:25am UTC](https://forums.speedlife.net/t/how-to-do-diag-in-a-free-way/224234 "2012-06-29T05:25:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tergen](https://avatars.discourse-cdn.com/v4/letter/t/e47774/32.png) [@tergen](https://forums.speedlife.net/u/tergen)\
**Post date:** [June 29, 2012, 5:25am UTC](https://forums.speedlife.net/t/how-to-do-diag-in-a-free-way/224234/1 "2012-06-29T05:25:13Z")

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Few days ago, I didn’t know cellphone can do the diag on car until I heard that from someone in forum, then I keep asking how is that going, and today I think I may be totally know how it works, and What surprises me most is that the android app torque is free, which I used to be told the price is $25.  
Now if you don’t mind, let me show you how it work with the adapter elm327(I am new, please don’t judge me):

There’s an app in the Google Play store called [Torque](https://play.google.com/store/apps/details?id=org.prowl.torquefree&feature=search_result). There’s a free and a paid version. Install the app on you android or symbian, and then connect to the [elm327 bluetooth OBDII reader](http://www.xcardiag.com/wholesale/elm327-bluetooth-software-obd2-eobd-can-bus-code-scanner-tool-299.html)(3 .pdf may help) and read fault codes, clear them, and show RPM and other stuff. It’s pretty cool and it works.  
Anyway, I really like to do this stuff on my phone, convenient  
[![http://www.xcardiag.com/upload/pro/elm327-bluetooth-software-code-scanner-4.gif](http://www.xcardiag.com/upload/pro/elm327-bluetooth-software-code-scanner-4.gif)](http://www.xcardiag.com/wholesale/elm327-bluetooth-software-obd2-eobd-can-bus-code-scanner-tool-299.html)  
 ![http://pocketables.typepad.com/.a/6a00d83451c9ec69e20147e0db9dac970b-800wi](http://pocketables.typepad.com/.a/6a00d83451c9ec69e20147e0db9dac970b-800wi)