big problem - no start and electrical problem

[no2lurch]

car is a d9 2.2 sri

just after leaving the house this morning, the car cut out and all electrics died. i had nothing on the dash or the display where the outside temp is. eml on then.

its started again ok and drove fine until i was on the motorway when it happened again - all electrics died and engine cut out. wouldnt start tho. after a few mins, the dash and display came back to life and its started. the car then drove fine.

got to work and tried to read the eml, but the electrics were shot again when i turned the key - rev counter was reading above zero as was the speedo. managed to red the fault code and it says P0606 - ECM/PCM processor.

its sat in the car park at work, wont start, and the electrics are shot.

what does the code mean? and whats gone wrong it?

[no2lurch]

forgot to add, the temp diplay just shows 'engine immobiliser fault' now.

[FarmerPug]

whats the footwell connectors like

[steve_earwig]

Oh s**t A swift Google says the engine's ecu has had a nervous breakdown. I'm not entirely sure where the immobiliser actually is but I presume the BSI. I guess the two are related, so not necessarily the ecu up the swannie. I'm not really sure where to start but I guess it's the usual dodgy connections, blown fuses, look for anything wet kind of stuff. Pull the battery (remember 3 minute rule) and reseat the engine management ecu connector. Good luck!!

[no2lurch]

Oh s**t A swift Google says the engine's ecu has had a nervous breakdown. I'm not entirely sure where the immobiliser actually is but I presume the BSI. I guess the two are related, so not necessarily the ecu up the swannie. I'm not really sure where to start but I guess it's the usual dodgy connections, blown fuses, look for anything wet kind of stuff. Pull the battery (remember 3 minute rule) and reseat the engine management ecu connector. Good luck!!

the 3 minuite rule? whats that please?

reset the engine management ecu connector? how do i do that?

when you say wet kind of stuff, where?

sorry for all the questions.

[no2lurch]

just been out to check the car. i locked it with the remote fob earlier and now i can only unlock it with the key in the lock. put the key in the ignition and tried to start it. all i got was the oil can light on and the airbag light on real dim. there is some clicking under the steering wheel with ignition on. car turns over but wont start.

[steve_earwig]

Oh s**t A swift Google says the engine's ecu has had a nervous breakdown. I'm not entirely sure where the immobiliser actually is but I presume the BSI. I guess the two are related, so not necessarily the ecu up the swannie. I'm not really sure where to start but I guess it's the usual dodgy connections, blown fuses, look for anything wet kind of stuff. Pull the battery (remember 3 minute rule) and reseat the engine management ecu connector. Good luck!!

the 3 minuite rule? whats that please?

reset the engine management ecu connector? how do i do that?

when you say wet kind of stuff, where?

sorry for all the questions.

3 minute rule viewtopic.php?f=10&t=13431&p=122217&hil ... le#p122217

Not sure if it's that important but best not to give it any more excuses.

Reseat - pull it apart, put it together again. Best to check the pins for any issues (damp, bent etc.) while it's off.

Wet - anywhere really, although under the carpet is favourite.

No worries, I bet you're close to panic just now.

[no2lurch]

No worries, I bet you're close to panic just now.

yeah totally! lol

like you said, no need to give it any toher excuse to bugger up so let me get things straight - disconnect the battery before taking the ecu plug off?

what connectors are under the carpets? do you mean in the passenger footwell?

[FarmerPug]

i dont know what they are for but when they get wet all hell breaks loose in the electrical department.

[no2lurch]

i dont know what they are for but when they get wet all hell breaks loose in the electrical department.

where are they?

[steve_earwig]

I think I'd pull the battery before anything else. I'm not sure if it's vital but sounds like the BSI is in trouble, there's all sorts of stray current flying about and the engine management ecu is directly connected to the BSI. I've not seen under the carpet (yet, job for this year I reckon) but it seems like most of the BUS connectors are under there somewhere. I guess it's a pain in the bum to lift the carpet (especially if the seats are still in) so check other stuff first, but if you can't find problems elsewhere... Hmm, condensation on the BSI connectors would seem a possible too, my car's struggling to dry out inside these days...

[FarmerPug]

passenger side footwell under the carpet.

[no2lurch]

MORE UPDATES - i've just been out and there is no electrical activity of note. when i press the fob, there is a sort of clicking noise which i presume is the central locking trying to activate. with the drivers door open, the windows dont work, nor do they when the ignition is on. the head/side lights dont work either with ignition on or off. the car still turns over fine but no sign of starting.

would this perhaps point to problems non ecu related?

[FarmerPug]

its pointing very much to the bsi which makes noise under the steering wheel when its not happy.

[Gary406]

have you seen the section in knowledge base ?

about crazy electrics under the carpet ??

sounds like he had same problem as you