2.0 hdi xantia won't fire

[citroenxm]

Change the pressure sensor for a known one, or have you done that?

DONT worry about the heater plug that will be glow plugs, but like all DI engines, it doesn't really need the neater plugs working. Ive NEVER put any in mine at all, and she still starts fine.

[taffy]

ive changed it for another one
but even with it disconected the 9v still there
whats baffling me is rail pressure said 400bar!>

[taffy]

no ecu faults thou i take it thats good?

[citroenxm]

Yes and 400 bar rail pressure IS VERY GOOD, and should start on that.

Mine starts when the rail pressure shows 200 bar...

[taffy]

im getting multimeter bk out morrow
it came up with low pressure pump too +ve?

[taffy]

would it have something to do with double relay i wonder? as both circuits connect to it?

[taffy]

well im no closer today and i been through alot of wires...
does anyone know the 88 pin edc15c2?
at end towards the rear of car on the connector on the right are four cream wires(as far as i know theyre earths)
q is are they earths?
i cant find a decent pinout anywhere!
if anyone can help id be very gratefull

[taffy]

one thing thats buggin me is i got volts on a earth bout 6...its the last earth(i think)on the rear of ecu to the right and this goes to the heater control...theres a body connecter in the wing which i disconected and it diddnt change...looked through the loom as far as i could couldnt see any thing...i will have another look monday now gota help me mate for weekend...thanks for ur help as always

[taffy]

ok i got it now
88 is the pin i was refering to and indeed it is glow plug control earth...i had it disconected and there was volts there
i chased the wire through the loom across gearbox under fuse box and it goes into this sealed unit which bolts into the wing..
have theses been known to fail? it cant be conected to the right side wing socket as i disconected it and still volts there,but also it conects to left side to..i just thought i better try both sides monday..

[citroenxm]

The ECU controls the Glow plug box on the HDi, it senses the outside temperture and operates the box as needed, however, in the UK they are rarely used I THINK. Ive never put any plugs in mine. Have you put heater plugs in yours taffy??

I think the 8v DI will still always start with or without heater plugs in working order.

PS: Do you STILL possess ALL those Xantias in your signiture???

[taffy]

im still trying to get a good pinout with description
haha i wish i did cause id have plenty of spare parts lol!
another thing that bugged me was the two earths from double relay were scotch locked together...disconected them and the pump now primes for 3-4 second and stops...it was running constant before?

[citroenxm]

another thing that bugged me was the two earths from double relay were scotch locked together...disconected them and the pump now primes for 3-4 second and stops...it was running constant before?

CORRECT OPERATION there now! Thats exactley what she should do with ingition on....

Next step.....

Ah shame you not got the 1997 Black TD SX. Id offer a swap for my HDi for that one...

[taffy]

ah that was my fav car...i killed her unfortunatly trying to bump start her while suspension was up...snapped top mount and went straightthrough timing belt..i should have fixed her but had no time so bought another one..in the days i was flush lol!

[citroenxm]

Ahh shame. Ive got an L reg Black one in the middle of resto... but if I could get a tidyer BLACK one, I would. Mind you, after Ive changed the dirty grey carpet, swaped the VSX seats for Leather, and swapped the Dash for a cleaner one with glove box fitted (air Con type glove box) because I retro fitted Air Con, im hoping she will be half decent. Need to touch up a scratch on the drivers side too...

[taffy]

sounds like a possible show piece