wheeler wrote:The wire that rots behind the battery normally causes a complete non start situation & no communication with the ABS ECU but it could be worth checking first.
The C4 Pic fusebox should be almost identical to the C5, How did you manage to break it & why did you have it out for a clutch change ?
Does the wire drop right off wheeler, or just go a bit thin looking?
Re the C5 - took it out 'coz Haynes said so
![Laughing :lol:](./images/smilies/icon_lol.gif)
IIRC it was obstructing the gearbox mount in any case - perhaps it is possible to get the box out without removing it with practice - but it was hard enough as it was. Break it? Easy - there was an ominous crack as my mate tightened up the nut on the main power post. Must have broken the supply off the board. It started intially, but then refused to later on with all sorts of random-ness going on....
Mandrake wrote:You might have been too slow getting the Lexia onto the car - some temporary faults are automatically erased quite soon after they stop misbehaving so I'm not surprised nothing was listed. If it happens again get the Lexia on it ASAP and I think you'll find something.
Maybe, sure the light was on earlier in the day, so it would have had 2 start max since.
Mandrake wrote:Not sure how communication failure between the two ECU's would be caused by problems in the fuse box - I would have thought that would cause one or the other ECU to fail to work at all, and the symptoms of that would be more obvious than a warning on the dash. If it was my car I'd be trying to find the connectors for the two ECU's in question and giving them a good clean with contact cleaner and also do a visual inspection of the wiring harness between them. (Easier said than done I know!)
Dunno - might be one of those things where replacing the fuse box fixes it, but in reality the act of unplugging the connectors etc is enough to fix it. That was going to be my first job anyway, drop the battery out, have a look at the wires behind, and then the connectors and fuses on the board.