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Hello, I have a BCNR33 and the car is not pulling all 4 wheels. The rear left tire seems to be the only one making power. I checked and my Attesa pump is not coming on and I checked for power to the pump and there isn't any. I checked fuses and I need a wiring diagram of which relays run the system. I replace the relay that's in the trunk (boot) and no change. I also had a leaking pressure switch on the pump so I spliced in another one. If anyone have any ideas of why the pump isn't getting power please share inputs. 20180209_205017.jpg

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If as per your heading you have a V spec then the rear LSD is computer controlled so if its single wheeling you need to fix that first. I believe the V spec attessa control is different as well but don't know much about the V spec. Again you may be able to extract fault codes from the relevant ecus.

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If as per your heading you have a V spec then the rear LSD is computer controlled so if its single wheeling you need to fix that first. I believe the V spec attessa control is different as well but don't know much about the V spec. Again you may be able to extract fault codes from the relevant ecus.
Yes it's different. I don't know if power is even at the ECU. I would like to see a diagram of the system if anyone has it by any chance. Yes the pump and ECU controls the torque split between the wheels. Thanks for the input brother
You need a Consult scan tool or equivalent first.  Codes can tell you a lot.  Not finding the ATTESA computer on the network at all is diagnostic in itself!
True..I might have to run to Nissan which I'm sure they would have one

Problem solved... It was the pressure switch. My buddy and I swapped ECU, Attesa relay, checked each other's fuses, made sure things were getting power and I ground a wire and it came on. So I knew then the system wasn't dead [emoji879]️. So I had a pressure switch that I spliced in from another pump and wallah she came on. The pressure switch is not meant to be separated from the pump but I made it happen.

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