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Author Topic: ECU pin out help for Aquamist install  (Read 6042 times)
A62turbo
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« on: March 03, 2013, 01:19:33 PM »

To make a long story short I have all the ECU connections figured out except for 1, on the 2.7t S4 instructions it tells me to splice in to pin 104 from the ECU, but my ECU does not have a wire there. My car is a 2003 A6 2.7t with BEL motor and Motronics 7.1.1, I'm sure that has something to do with it. Can someone help me locate that wire/pin on my ECU? Thanks!





Looking for OE BCV section at the top of this diagram, as you can see in the above picture I don't have any wire there
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Arrkon
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« Reply #1 on: April 18, 2013, 11:57:07 AM »

Looking at the diagram it suggests the wire to the N75s (bcv) , but could in theory use the n249 to limit the boost too... off hand I can remember which pins I'm afraid
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cyril279
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« Reply #2 on: April 18, 2013, 12:40:36 PM »

the pdf in this post suggests that pin 104 should be "N75 Wastegate Bypass Regulator Valve" and would have a bl/gn wire attached, which agrees with your diagram.

are you sure you're looking for the wire at the correct location?

edit: I can clearly see that your connector is missing the wire at the 104 position. no clue.
-Cyril
« Last Edit: April 18, 2013, 06:14:27 PM by cyril279 » Logged
prj
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« Reply #3 on: April 18, 2013, 02:05:03 PM »

Much better idea is to do map switching off of the orange wire.
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Mantis
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« Reply #4 on: April 18, 2013, 02:19:24 PM »

Wiring on BEL motor is as follows

MPS-101 Grey/blue
N75 -116 Blue/green
Inj 1-96 Brown/Yellow
Inj 4-113 Brown/grey

I included INj 4 because the last HFS-3 I helped install the recommended reference injector was 4 not 1
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