Technical Fuel Pump Electrical Fault

[Deckchair5]

"Is dashboard code warning light off when it should be?

What warning light, the engine management light is on? "

The code light - the yellow padlock- I would guess not if you haven't seen it on- Just wanted to make sure the immobiliser wasn't sill affecting things

ok next bit

U1600- key not recognised as you're stuffed if that's happening

I don't think it would be the key as if I put 12v direct to the fuel pump and turn the engine over, the car starts, and continues to run until I cut the power to the fuel pump. I have also renewed the aerial around the ignition.
That's ok, as long as you're not still getting U1600 as you'll never get fuel and ignition if that is on

next bit

If I put 12v direct to the fuel pump and turn the engine over, the car starts, and continues to run until I cut the power to the fuel pump
But what doesn't sound right is that you answered previously

If you put 12v power on t10 pin 87 the fuel pump runs yes?
No, but if I measure the voltage between pin 87 and live, I get a +12v
because that's the same circuit so it should make no differnce whether you apply 12v directly to the pump or apply it at T10 pin 87. So it sounds as if you have open circuit there on the fuel pump line from relay T10 to the pump which is what the previous fault code was saying too
P0230 = a fuel pump primary circuit failure.

Fuel pump circuit goes through connectors D4 so you'll need to trace and find the break in the circuit through there.
If you put 12v on relay T10 pin 87 then the fuel pump should work straightaway provided the inertia switch isn't triggered

Oil pressure switch K30
Can this prevent fuel and ignition on an engine start? I don't know, seems a bit radical, or is it, you don't really want to start the engine if it can't obtain minimum oil pressure. As it simply provides an earth you could supply an earth there at the switch just to eliminate it but it does say "Circuit failure" so there could be open circuit there too. Should be simple to check

 

[Dax]

Fuel pump circuit goes through connectors D4 so you'll need to trace and find the break in the circuit through there.

Just to confirm, connection D4 is the block connector on the coner of the cam cover to the front of the engine? Also, where would I find D97?

Is there a wire colour key on elearn I can print off? Only the colour key I seem to have aquired from this forum seems to differ slightly with the actual wire colours on my vehicle.

 

[Deckchair5]

D4 is under the B1 fuse box in the engine bay


Operating logic for the fuel pump looks simple with no complications, should be ignition on and a plain and simple fuel pump on 0.8sec later


Don't worry about the D97 connector, that's on the brake light switch circuit

You can download 2.4 fuel and ignition circuits here and print off if you like but they're easier to see on screen

http://rapidshare.com/files/402609384/Stilo_2.4_fuel_and_ign_1.gif.html 159k

http://rapidshare.com/files/402609418/Stilo_2.4_fuel_and_ign_2.gif.html 148k

[FONT=&quot]N= BLACK
B= WHITE
C= ORANGE
M= BROWN
A= LIGHT BLUE
S= PINK
V= GREEN
R= RED
Z= PURPLE
G= YELLOW
H= GREY
L= BLUE[/FONT]

 

[Dax]

Re: Fuel Pump Electrical Fault, NOW SORTED!!!

I can't believe the amount of time and parts I've replaced trying to find this fault!

I thought I would check where the wires went into the body fuse board under the dash. The wiring diagram just shows the wire going in and out, and not connected to any other part of this fuse board, which is why I have not paid too much attention to it. However, whilst taking the relay out to clean with electrical cleaner I caught connection block 'A' of B2 fuse board, and the old fuel pump I had connected out of the tank started to work!! I took this block connector out and the fuel pump female connection was not sitting correctly. So I straightened it up, and the car works perfectly with no errors.

I like my Stilo again now!!

Thanks for your input deckchair

 

[Deckchair5]

Brilliant! Worth the time and effort

 

[dougiedo1]

Did you ever get to the bottom of this because it's very similar to my ducato 2.0 jtd. All parts work independently with power to them but not collectively on ignition side, lift pump glow plug circuit & injectors. No communication with ecu so can't even get a diag on it but obd2 pins 4,5 & 16 reading ok. auto electricians been scratching their heads can't get any info.

Never had probs, never missed a beat just filled up with diesel came out of forecourt then it cut out completely dead, no stuttering, ie mucky fuel. The key lock symbol came on. So rac said it was ignition-fuel delivery. So from then on the ecu & glow plug symbols ain't been on on dash. Cranks perfectly.

Had transponder checked said it was corrupted buggered so had ecu sent off & remapped taking out that problem side but the same prob is there even with new ecu, so not that then. what is going on especially not reading ecu when pluggin in.

Did you sort yours out in the end.