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[middy]

HI
2.2Dti (03) Y22DTH
I need a pinout for the ECU harness connector. , and if anyone can provide a layout with description of the surrounding relays i would be very greatful

Thanks

[TheBoy]

The relay locations should be in FAQ section - look at Jimbob's Index at top of FAQ and Maintenence Guides sections

I have the wiring diags here, but cannot print them out due to Windows 7 being an arse.  What pin are you looking for?

[middy]

2.2 Dti (03) elite
I wanted the relay layout for future reference purposes, The ones listed in the FAQ's section do not included the Y22dth and i'm not sure if any listed would correspond to mine.

As for the ECU pinout,
I'm trying to track down a Crankshaft sensor fault P0725 & P1335.(this has been posted in the general section)

I replaced the sensor with a non genuine part and the fault has persisted. I've tracked down ecu harness pin 98 (crankshaft sensor terminal 2) and pin 90 (crankshaft terminal 1) and pin 101 i believe is ground but need this confirming.

Also, what value would constitute a short circuit value if testing from the ecu harness connector pins (90 & 98) to the corresponding connector pins connector on the crankshaft sensor harness socket ?

(I mistakenly put camshaft, modified to read correctly -crankshaft)

[TheBoy]

Sorry, you've confused me. Camshaft or Crankshaft sensor?

[TheBoy]

Crank...

[middy]

Thanks. Its the crankshaft sensor (Not Cam) with the problem.

Can you tell me what definatly constitues a grounding point on the ECU harness connector, Managed to get hold of a TIS fault finding guide for this fault but i'm not entirely sure if i trust what i see...but then again the multimeter i'm using is a 5 quid special 

[TheBoy]

0v is provided on pins 1 and 2 on x80, both are brown wires, 2.5mm

[middy]

Thanks for your help so far admin.

On the plastic fixing of the crankshaft sensor, the retaining screw passes through a metal sleeve. Can you tell me, is the screw itself acting as a grounding point via the engine for the sensor once screwed back into place ?

The area around the screw hole on the engine was corroded, which i cleaned up as best i could(access was'nt easy). However i did notice the inside of the screw hole was rusted, but i have nothing to get inside of it.

Any ideas. ?

[TheBoy]

Thanks for your help so far admin.

On the plastic fixing of the crankshaft sensor, the retaining screw passes through a metal sleeve. Can you tell me, is the screw itself acting as a grounding point via the engine for the sensor once screwed back into place ?

The area around the screw hole on the engine was corroded, which i cleaned up as best i could(access was'nt easy). However i did notice the inside of the screw hole was rusted, but i have nothing to get inside of it.

Any ideas. ?

Never looked at a DTi crank sensor, so can only go by schematics. Looks to me as if the actual hall sensor is connected to ecu via a pair of wires, and there is a grounded shield around this cable to suppress outside iterference...

[middy]

Hmmm There was no shielding present around the cable, have owned the car for 3 years so either it never was there, or it was removed when i had an injector pump issue looked into about 2 months ago.

[middy]

Spent another day playing around with this. Have been following the TIS fault guide forwards backwards and side ways, to my mind everything points back to the new crank sensor.
Points to note..

• The measured resistance across terminals 1 & 2 of the crank sensor when the fault is not present is around 900 - 1000 ohms

• The measured resistance across terminals 1 & 2 of the crank sensor when the fault is present is Infinity

This cycle continuously repeats each time the engine is run long enough for the fault to reappear (infinate resistance), and allowed to stand (900-1000 ohms). The transition time between the two extremes of measurement is almost instantaneous, by that i mean there does'nt seem to be a gradual roll off of resistance , during the 5 min or so the sensor takes to switch back into working mode it will go from infinate back to the working range in a snap.

I think it's fair to say that the sensor resistance is going open circuit as temperature increases.

Anyone have anything to add before i dispose of some more cash ?

[Abiton]

...Anyone have anything to add before i dispose of some more cash ?

No, sounds like you've established that the pattern part has gone intermittent.  Buy a genuine one from a Vx dealership this time and it should last a whole lot better. 

[Kevin Wood]

Yep, crank sensor is going open circuit by the sounds of it. Might be worth checking at the crank sensor itself in addition to at the ECU just in case it's the section of wiring between ECU connector and engine loom plug for crank sensor but more than likely the sensor itself IMHO.

Kevin

[middy]

Might be worth checking at the crank sensor itself in addition to at the ECU just in case it's the section of wiring between ECU connector and engine loom plug for crank sensor but more than likely the sensor itself IMHO.

Kevin

Thanks. Fortunately i had the foresight to do that anyway, wanted to be certain there was no other possibility.

[middy]

Just a quick update. This was defo the replacement crank sensor at fault. Got a genuine part, problem solved.