Hi guys, is there a link or thread for ecu N351 circuit description. Reason is I have 2 that have burnt circuits. One from my car the other I bought off ebay that was burnt . I just want to see which circuits are burnt to see if it's relavent to driveability. Don't want to buy another damn ecu. Thanks.

 

Mazda does not release such proprietary information.
You're better off just getting a used unit.
They are not that expensive.


-Ted

 

I agree with RETed try any salvage yard that you live near chances are armed with the ecu number they'll have one for cheep

 

strange, these ECUs don't fail all too often unless they are submerged in water or the car itself has an issue.. you sure your problem isn't the latter and your car is killing the ECUs?

 

I know ecu's are usually the last thing to go. One got fried that was the original ecu for the car. The other was off Ebay that was apparently fine from a running car. Oh well will have to keep looking.

 

Start the car up and fully warm it up. Let it idle at approx 750 or so. PUll the BAC plug off as it idles. Listen to see if the rpms change to a lower reading. Reinstall the BAC plug and listen for the rpms to rise and maybe chugg for a moment before settleing down. IF you have a idle that is above the 750 figure, well just forget about doing the above til you have a real idle.

IF the rpms did not change when you did the above, I'd suspect the BAC circuit is shorted to gnd or the wires on the BAC to each other.

If the rpms did change, then look for a shorted Port Air solenoid or Split Air solenoid on the ACV. The wires to them, not a internal short in them.

 

If you need an ECU, I got one. Make me an offer. It's just sitting here anyways.