Oil pressure sender - wire to where? | AEM
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jhawley
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Oil pressure sender - wire to where?

Hi, I've installed an oil pressure sender. Where to I wire the signal wire to?  The docs suggest C2-18 (blue ECU connector), but this comes from the breakout box.  How do I find which wire to connect to?  Can I use the AUX plug?

Jay

 

AEM_PT
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Joined: 05/22/2014 - 08:13
Assuming you are on the PnP

Assuming you are on the PnP harness . If you open up the harness instructions, you will find tha the factory oil pressure sensor functions via CanBus through the infinity. You can replace the sensor and wire the signal wire directly back to C2-18 on the infinity connector. 5V reference and sensor ground can come from the AUX connector. 

jhawley
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Thx.  Yes, using the PnP. 

Thx.  Yes, using the PnP.  There is no factory oil pressure on the e46 M3.  There is only a sensor for low oil pressure warning.  So there is no oil pressure reading from the CanBus.

The docs reference Analog_In_13 as the association to C2-18.  Analog_In_13 is pin #11 on the Aux connector, no?  Is this the appropriate place to wire the signal?

AEM_PT
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Analog 13 is at C2-18 but is

Analog 13 is at C2-18 but is not at pin 11 on the AUX connector. The signal wire will need to go from the pressure sensor directly to the infinity connector. You can grab 5V reference and sensor ground from the AUX connector at pin #3 for sensor ground and #4 for 5V reference power. 

jhawley
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Ok thx!

Ok thx!