I’m having no luck getting the Infinity 506 to read my AEM 150 psi fuel and oil pressure sensors along with the AEM oil temp sensor. I assume the oil pressure sensor is good because it used to work with my previous setup with my other AEM ECU. Now that I switched to the infinity I can't get it to work. The other two sensors are brand new. I've configured them in the "wizard" section and double checked on separate occasions, in wizard, to make sure the info didn't change and it hasn't. I then disconnected the "D" connector and checked the 5v pin from the ECU harness to a chassis ground and then to the sensor ground in the harness and I'm only getting about .5 volts or less. This has been done with the ignition set to "on" and then with the car running and still getting the same results. I also checked the 12v pin within the harness where the "D" connector was and got 0 volts. I have my signal for fuel pressure in D1 and for the oil pressure in D5. Do I have a problem with the ECU already or am I doing something wrong? Will I be able to attach the ground for all 3 sensors to the same sensor ground or can the remaining grounds be attached to the chassis?

 

All of these important sensors should be connected to sensor grounds only. Not chassis. I don’t recall exactly but there’s only one or two of them on infinity.

You should be able to terminate all 3 just fine on that sensor ground pin.

I highly recommend you make a post on AEM forums before you proceed:
AEM:
”But for what it's worth, in most cases, a harness will only have 1 or 2 wires for 5v or sensor ground that have to support an entire engine's worth of sensors and it's usually fine. You can do a test and see what your voltages are for TPS/MAP before tapping 5v or sensor ground and then check those voltages again after being tapped. If they stay the same, you're fine.”

 

D connector? do you mean aux connector on the aem pnp harness? Is it possible you got the pin numbers flipped around on the connector (male vs female side)?

It's been awhile now but I believe this is the setup I have:
Aux pin 1 - Fuel pressure sensor signal
Aux pin 2 - Oil temp signal
Aux pin 3 - sensor ground for all 3 sensors
Aux pin 4 - Sensor +5v for the 2 pressure sensors
Aux pin 5 - Oil pressure signal


Which sensors do you have exactly? I had an aem brass pressure sensor that was DOA, I ended up upgrading to the stainless ones

 

Thats what I have for the aux pins as well and it’s how I have it setup. I’m certain they’re not backwards. I am using all stainless sensors from AEM. Thanks.

 

I’m still waiting to hear back from AEM. I do have 5v at the map as it sits now. Thanks

 

I just wired my oil pressure sensor in. Same exact AEM 150PSIG sensor as yours. I am also going to be wiring in the 100 PSIG fuel pressure sensor and the oil temp sensors this week. They are all AEM sensors.

On the 150PSIG sensor:
I have the red wire (+5V) wired to pin 4. the black wire (sensor ground) to pin 3 and the white wire (signal) to pin 5, which is the Analog_In_13. I would do a volt check at the sensor terminals to ensure you have proper 5V going to it. Get a multi-meter, put it on voltage, put your car on AUX, don't have to start it. Check the ground and positive are getting ~5V. It should be around 4.95V-ish. Then take the Positive end (RED) put on the signal output with the Negative end (BLACK) to the ground and you should be be getting about 4.55V-ish. if that all checks out then your line has power and it is getting signal.

Plug USB to laptop, open AEM Infinity Tuner, connect USB, then go to Wizard and look for basic sensors. The oil pressure sensor should be reading ~0.55V. If you need help PM me here, or DM me on IG @kaotik25. I'll try to help and walk you through it.

 

Ended up running a new ground to the harness which cleared up some of the issue. He other problem was one of the new sensors was bad out of the box. Got a new sensor from aem and plan on installing it one of these days. Thanks.