Hi all,

Would anyone be able to help with a problem on a '95 540?

The engine won't start... no fuel pump running. No power at the fuse. Checked the fuel pump relay- all pins are good except for the feed from the DME. I guess this is straight from the Motronic box.

If the Motronic is not pulling the fuel pump circuit up, is it because something in the car's security system (if it has one) is halting it? I don't know what the modern e34s have, but I read that there may be a EWS unit behind the dash? There is no security system under the rear seat, just the battery an EDS unit on one side, airbag sensor in the middle, and then the relay and GM box on the other with nothing in the least being security related.

I think the older e34s use the code feature in the OBC to disable Fuel Pressure and also (perhaps thus) the starter motor.

Does the EWS on a '95 connect in to this also?

Is there a way to reset it?

The car was starting until I disconnected the battery. On re-connecting it the car wouldn't crank. Dashboard lights etc all work properly it seems, and the coolant pump (and power in the engine bay all seems to come up as as it should).

It has the modern remote key-locking system (EWS?) a la e36 and the central locking is stone dead. The keyfobs don't remote operate either of course- but the car did used to start regardless.

Now the starter and fuel pump are stone dead.

Can anyone suggest what to check?

Already checked:
- Full power at the battery (13.7V- jumped with another, still nothing)
- Extar ground strap to the motor (before I realised there was no power to - the FP relay)
- All fuses (Fuse 23 (FuelPump) dead- but fuse not blown)
- Main relay (provides power to the ebox relays as it should)
- Trunk harness (the wear problem seems fixed on the 95 models...)

Many thanks in advance, Nick