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Discussion Starter · #1 ·
I have a 2012 Insignia 2.0 CDTi which recently displayed a Fuel pressure fault code. I checked the wiring as suggested by the RAC man, as he seemed to think the pressure switch was new. I simply checked these for continuity across the top of the loom. Since putting the look back in place and reconnecting the leads, the car won't even turn over. When I turn the car to the start position, the relay seems to click, but won't turn over. There were no problems prior to this with the starting. Checked all Fuses 2 or 3 times now and earths etc.Even re-traced my steps back through the loom to make sure I hadn't mistakenly broken a wire or left something un plugged, but cannot see anything wrong.

Any clues anyone please?
 

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Have you identified which is the starter relay in the UEC ?
 

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No it's in the the UEC along with the starter fuse and lots of other fuses(under the bonnet)
do you have a multi meter to check battery and relay voltages ?
 

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OK i'd check the battery is ok first,voltages static and then while attempting to crank
here's the relay and fuse positions and a simple starter power check by loadtesting,
but a m/m will at least let you know if there's any power there at all

Schematic Font Engineering Pattern Parallel
Rectangle Slope Triangle Font Parallel
 

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Discussion Starter · #8 ·
Hi Valer, so I have tested as suggested.

Battery voltage is stable when cranking.
Pin 87 functions when power is added to it.
I have no voltage output across 85 and 86 however?
 

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Hi Valer, so I have tested as suggested.

Battery voltage is stable when cranking.
Pin 87 functions when power is added to it.
I have no voltage output across 85 and 86 however?
So it's cranking ok now or do you mean the battery voltage is ok when attempting to crank ?
did directly feeding 12v to pin 87 get it cranking over ?
 

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Discussion Starter · #10 ·
So it's cranking ok now or do you mean the battery voltage is ok when attempting to crank ?
did directly feeding 12v to pin 87 get it cranking over ?
Hi, It stayed at 12v when turning to the crank position. It's still not cranking over, although it sounds like it is engaging the solenoid when 12v is added to that terminal. I think I had turned the ignition off when I added the 12v to that terminal, so not sure if that makes a difference.

I had to break off for a while, so will look at jumping back on it over the coming days, to see what next
 

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Discussion Starter · #17 ·
I all, just to let you know I got it started. Been through all of the wiring, even UEC connections etc. and eventually found that it was the connectors inside the multiplug that connects to the Fuel rail pressure señsor that was providing a duff connection. Never come across it before, but all works now as it stands and no fault codes returned. Thanks all for the pointers.
 
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