no power to fpcu-or pump?

[omarb45]

changed out fuel pump after jumpering it no sound or start.opened fpcu looks brand new inside.no burns anywhere.Car crancks fine .followed wire bundle to rear next to antenna seen a relay does that have anything to do with pump.im thinking powers not being sent .didnt check main ecu wasnt to sure how to get at it without messing up rug.where do fpcu/pump get power from?looked at fuses they seem to b ok.only thing i can think of is what happened to my neighbors 740il water got in through sunroof cooked his computers,I also left roof up in rain storm months ago.any ideas?

[Q451990]

Check out the factory service manual at http://www.nicoclub.com/FSM/ for the relay location.

I assume the FPCU is installed and bolted in? It grounds through it's case...

Heath

[omarb45]

yes put everything back together.tried down loading,but when I open pdf its just a bunch of 1-0's.computers just as old as my q.

[omarb45]

HELP shes been sitting for a week.anyone else have same problem?I know its something simple.wheres all the experts?Im about to use my pocketlite 380. an use it for target practice.

[Q451990]

I have no idea how you will figure this out without the FSM. Any chance you can borrow someone else's computer? You don't even need to download the file - you can click on it and view that part...

The fuel pump relay is in the trunk, and from what I can tell it's mounted on the right side below the power antenna area and it's green.

That said a failure of anything other than the pump or FPCU is pretty rare - I think I have heard of one or two relay failures.

Heath
Modified by Q451990 at 2:06 AM 9/26/2009

[omarb45]

yea I was thinking that really was for that n not antenna.is there another relay on car that I can switch with it?shes been sitting a whole week with a half tank of Bushes finest methonal I try to run her every day even if Im not going anywere.thanks for insight been pulling my hair out..oops dont have any.one more question..I read that if ur check engine light comes on with second turn of key then computer is good.

[Q451990]

ECU failure is very, very, very rare. I think I have heard of two instances now...

From looking at the FSM - it appears that if you see another green relay that plugs in it should be the same. That's just a guess though... try it at your own risk.

Or if someone else here has FAST up and running (Nissan's parts catalog) they might be able to tell you if theres a match elsewhere on the car for sure.

Heath

Modified by Q451990 at 1:55 PM 9/26/2009
Modified by Q451990 at 1:58 PM 9/26/2009

[omarb45]

pulled a green relay today next to antenna. its four pronged top line reads as...23230,second reads...c9965,third reads...12v,fourth reads..30705m.thanks 2 all who helped.my girl loves the fact my babys down, and i have to ride with her in her(gasp)honda.I remember when I went to dealer.she didnt like ol girl and instead wanted me to choose between a white j30 ok but small and a strange but very nice shade of blue camry v6.

[Infinitiguy19]

English classes are your freind because what use is wanting an answer if you barely know how to ask.

But are there any aftermarket alarms on the car?

Are you doing this when the car is unlocked?

Try insering the key in the passenger door and unlocking it then start the car.

Or replace the green relay in the trunk.

Does the wiring for the pump and control unit look kosher (in good order)?

When you try to start it do you hear a click click?

Does the fuel pump prime when you put the IGN in ACC?

Try grounding the pump and see what happens (Weird guess):

Make sure there is a wire connected to the aligator clip that goes to an unpainted surface on the car.

[omarb45]

No aftermarket alarm.Yes car is unlocked.Havent tried unlocking passenger door.Have replaced green relay now just hear a single click from trunk.Wireing for both fuel pump and fpcu look brand new.Opened fpcu,looks new all over.car does crank,even tries to catch guessing from vapors.Both fuel pumps wont prime.Tried grounding fuel pump,maybe will try again with different wire.

[goody90q45]

Your local hardware store will have alligator clips and wire the same gauge as the ground wire in the connector. You'll need to file off the teeth of one of the alligator clips to make it grip the connector pin (as shown in the pic).

[omarb45]

ok,this is weird.I checked fuse ,it looked fine,so upon feeding my sadness with Mcdonalds 1/3rd pounder.I decided to go across street to autozone 2 get a (real)fuse puller,been using tweezers.Went home and went towork pulling fuses and low and behold...the fuel pump fuse is..drum roll...BLOWN!Pulled wiper fuse put it in and car sputtered to life.wtf! I swear 2 people looked over that dam fuse and it was good.So,iI put the newer pump in car wouldnt start dam!pulled it out put old one back in.car sputtered to life.ok..now seems like more than one injector is clogged or out . I mean the whole car from outside was bouncing like a lowrider.cant find ohmmeter so I took her out on rt.1 after filling up with fresh petrol and gunned her for half an hour.got a little better but shes bouncing hard.even exaust leak seems louder.

[Q451990]

Well, at least you figured out your fuel pump issue! Time to find that ohm meter...

Heath