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Wideband CAN AEM X Series 30-0300 - Ultimate Guide


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Hey guys, after less than a year the o2 sensor that came with the AEM 40-4110 stopped to work properly. Doing some research I discovered that most likely it was because I had it wired on the ignition on and when the car is not running the sensor heater was always on and it could shorter the sensor lifetime. To avoid this problem on the future I found 2 options:

1) Using the Link Can that has the power to manager it;
2) Wiring a relay on a GP Output to power the sensor only after the engine is running;

I ended picking the AEM X 30-0300 to use it over can.
The choice of the AEM X instead of the Link CAN is due the price (Link is almost 2 times more expensive in my region) + couple of weeks until it arrives here.

I found a bunch of information about it but in many different posts, so decided to centralize here.

AEM X 30-0300 Wiring
1855579794_LinkCanWiring.png.e791a05f65d80cfea0ac1b47b9a9f207.png

 

Relay Wiring to Link Aux Output
1439966919_RelayWiring.png.91567f3c8884f8fdb91ce17914140f59.png

GP Output Config

1459661252_GPOutput.PNG.59d7a5b4d183c43ff7eacc30f44e51ac.PNG

 

Questions:
1) Do I need to twist the CAN Wires from Link to AEM X 30-0300?
2) GP Output: Is the RPM > 1 condition the best strategy for this application?

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1 hour ago, tiago said:

1) Do I need to twist the CAN Wires from Link to AEM X 30-0300?

Yes, and you should add a 120ohm 1/4W resistor across the CANH/L wires somewhere near the AEM.

 

1 hour ago, tiago said:

2) GP Output: Is the RPM > 1 condition the best strategy for this application?

The other condition you could use instead of RPM is something like Engine running time > 30s, that may help get a little more of the condensation out of the way before powering up.

 

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