AEM V2, wideband and BTI gauge setup | AEM
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Scalla1384
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Joined: 01/03/2019 - 07:33
AEM V2, wideband and BTI gauge setup

How do I go about setting this up correctly? I want the BTI gauge to grab the signal from the wideband off the v2. I see that on the pin out, pins 47B is AFR 1 and pin 48B is AFR 2. Not sure if those are just for the factory o2 sensors?

Also the AEM wideband 30-0310, I have an analog +/- that I'm assuming goes to either 47B or 48B? Then the 2 AEM net wires I can just tap into my AEM net cable?

Thanks!

AEM_SB
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Joined: 06/07/2014 - 14:29
47B and 48B are the factory

47B and 48B are the factory O2 sensors on the Supra, they are narrowband sensors and most people ignore them since they aren't very useful for a tuned engine.

When you connect the wideband to those pins, it's important to disconnect the factory sensor so it doesn't interfere with the wideband signal. Also be sure to use the analog- wire from the wideband gauge to the ECU's ground pin. The wideband's analog+ voltage won't be correct if the analog- wire is left disconnected.

 

Then the 2 AEMNet wires from the ECU need to be connected to the CAN device (which is your BTI gauge in this case).  CAN wires are easy, the CAN+ pin from the ECU goes to the CAN+ pin on the gauge. Be sure you use the AEMTuner software to configure the ECU's CAN telemetry broadcast, the Series2 ECU doesn't broadcast anything on the CAN wires by default.

Scalla1384
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Thanks for the reply!

Thanks for the reply!

Okay, a little confused. So I can use pin 47B (AEM V2) and run the analog + from the aem wideband to this pin, correct? Then I have to ground the negative analog.

Once I do that, so I have to tap into the wires of the BTI can gauge for the can hi and can low of the wideband? Or if its tapped into pin 47B will the BTI gauge just pull that data?

AEM_SB
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Joined: 06/07/2014 - 14:29
Yes, there are two separate

Yes, there are two separate tasks you need to do.

 

1. Connect the wideband to the ECU's O2 input pins. The 0-5V AFR signal from the wideband goes to 47B on the ECU.   Also connect the wideband's analog ground reference (usually a brown wire) to the ECU's ground. The Series2 hasn't been updated in a long time, it's not designed to use the CAN data from the wideband gauge. Be sure to configure the ECU so the O2 data in the AEMTuner software matches the numbers on the gauge. This is especially important if your tuner wants to use closed-loop O2 feedback. 

 

2. Connect the BTI gauge to the ECU's CAN pins. The ECU will broadcast the O2 data (along with RPM, boost, TPS, etc) to the gauge via CAN.

Scalla1384
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Awesome, thank you very much!

Awesome, thank you very much! I appreciate the help!