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Renault Master II 2.5 Dci Fuel pressure wiring

Posted By Angus 4/3/2012 4:14:27 PM
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Angus
 Posted 4/3/2012 4:14:27 PM
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Renault Master II 2.5 Dci 120: 2006 ('07-plate) Engine G9U A 750? (label worn) Bosch system: Right old dog.

Just spent four wasted hours on this; it occasionally cuts out with DF007 flagged. (FRPS circuit.) It's recently had a new rail assembly for over-pressure - fine for a few months and now back with this.

Has anyone got a wiring diagram showing the three wires of the FRPS circuit on this one - both the ones I've got are wrong; the signal doesn't got to D1 on the middle plug.


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4/3/2012 7:39:25 PM by Angus
K And R
 Posted 4/3/2012 6:05:28 PM
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Angus

I can most likely help.

G9U (750) are any Number,s clearly visible

B 16, 15 and 5 are possible pins for frps

Kev.


"If you dont KNOW how it works, don,t try to test or fix it"
4/3/2012 6:18:02 PM by K And R
tk
 Posted 4/3/2012 7:50:14 PM
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There are three engine codes starting with the code you gave us,i need the missing info really!!

I only have info on one of those engine codes if it helps.

Pin 2 is the signal.Going to Ecu Connector b.at number c3

Pin 1 is the earth.Going to ecu connector B.At num c4

Pin 3,4.5v to 5.5 volt.going to Ecu connector b,at number c2.
Angus
 Posted 4/3/2012 7:51:58 PM
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Thanks Kevin

The printed label has had a loom spur rubbing on it, so the only definite number is the '5' in the middle - the other two are best guess from the remnants.

The plug is marked with the usual 1 to 4 and A to M - not sure how your numbers relate to that?

I'm fairly sure that this is an air ingress problem - it's never missed a beat for me - but I thought I'd better work through the DF007 checks for form's sake. Bad idea - it took me nearly two hours to drill out the, rusted-solid, cage security bolts just to get the ECU plugs off - and then things went steadily downhill from there...


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4/3/2012 8:37:14 PM by Angus
Angus
 Posted 4/3/2012 8:00:13 PM
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tk

Thanks; G9U 750 is as close as I can get - the label is too worn to be sure of the 7 or the 0.

I found a G9U Trafic diagram with an alternate set-up and I think I found an empty socket at C3 on the middle plug - I'll try and recheck it tomorrow evening. The signal wire is a dark purple one - and the only dark purple in that plug has battery voltage on it...

(You get the idea that this job just got worse and worse - so much for a quick wiring wiggle test...)


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K And R
 Posted 4/4/2012 4:54:36 AM
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Hi Angus.

I have 5 G9U, s listed 3 with a 5 in the middle 750, 754 and 650 w00t

PM me the chassis number and i can check it out better for you.

Kev.


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Angus
 Posted 4/4/2012 9:56:28 AM
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Thanks Kevin

I'm going back to it later, so I'll have a look for the chassis number.

I went through all the permutations and did consider 650, but went for the 7 as the remaining fragments fitted better.

Tolerance had a G9U 750 listed for a Movano - same wiring shown for all of them though.

I did find a "CP1 with 112 pins" option listed for an Espace G9T (G9Ts and G9Us wiring usually shown as the same) with a different pin layout (tk's one) so I'll double check that tonight.


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4/4/2012 10:03:28 AM by Angus
Angus
 Posted 4/4/2012 3:25:55 PM
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Update

I was reduced to belling them all through one-by-one until I found the other ends - all on Plug 1: feed E1; signal C4 and earth C5.

Needless to say, there was 'no fault found' on any of the FRPS cables - 0.06 ohms max - so nothing to charge for...

(Kev: PM sent.)


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Diagnostic Specialist
 Posted 4/4/2012 4:19:56 PM
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5
if i recall correctly the cable's of the RPS (rail pressure sensor) runs over the gearbox in a plastic protection. These cables then to wear and break in this place. worth checking
Angus
 Posted 4/4/2012 5:39:27 PM
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DS

They run forward into a hard plastic cover on the inlet manifold, then in a big loop of crinkle sheath from the vacuum pump area to a big distribution box on the chassis leg.

I wiggled everything really hard, particularly near the T-piece, but the most the signal voltage varied was one thousandth of a volt. I'm not ruling out a break; but nothing there justified the time to strip the loom.


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