I tried the OBD2 scanning interface on the Nissan Rogue. Overall for the cheap price, I had a pretty good first experience. Heres how it went:
-I hooked up the interface cable to the OBD2 interface port. This is located directly under the dash, by your shins, if you follow a straight line down from the steering wheel
-The interface then hooks via USB a laptop with ScanTool installed (this is the prepackaged free software that comes with the interface)
-Upon turning on the engine and ScanTool, the interface helps the computer read sensors in realtime. It also displays the error code that causes the "Service Engihttp://www.blogger.com/img/blank.gifne Soon" light.
-In my case, it was a I suspected error code P0456. This translates to : "Evaporative Emission Control System Leak Detected (very small leak)"
Attached you will find the Nissan Technical Bulletin that goes out to Nissan Technicians and shows a flowchart of exactly how to trouble shoot the P0456 (and other related) error codes.
http://www.mediafire.com/?2rqh22c5p2ol09g
It even has a nice last-page diagram of the evap control system in the car. Generally its claimed that with this Nissan design, the canister or the vent control valve often gets dirty / does not seal properly, leading to this pressure differential (ie small leak detected) triggering the sensor error code P0456. Interestingly, part of the test a mechanic can do involves soapy water and watching for bubbling to detect leaks. :)
Let me just say i was impressed with how much diagnostic is available onboard the car's chip! To think all these years i thought itd be more or less mechanical. As an added bonus, you can also clear your Check Engine light through software, if youre confident the error code is a non issue.
I will be taking the car to be looked at one evening this week, with the Nissan NTB in hand. Should help quite a bit. I'll provide an update as to what was done to resolve this problem as well as any feedback for future 'gotcha's for the evap control system.
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