Got an inteesting one here - the car is a UK 1997 230e estate.
It would appear the immobiliser is not turning off when I open the car.
I can open the doors, turn the engibe over but I cannot hear the fuel
pump spooling up.
The red and green lights go bonkers on the mirror. I've changed the fob
batteries etc etc and tried both keys.
However, if I disconnect the battery for a couple of minutes, it comes
out of its hissy fit and will start normally.
I suspect a relay somewhere.
Any ideas - thanks in advance!!!
There's nothing more dangerous than a resourceful idiot
I think the question was meant as whether the antitheft system would
open and lock the doors alright, assuming that door locks are
interconnected with the antitheft system and thereby the immobiliser.
As said earlier, the fuel pump circuit would normally only be
disconnected by the immobiliser as the last thing, i.e. starter- and
ignition circuits would be switched off first.
Since the engine will crank and instrument lights presumably are on,
you do have starter- and ignition circuits on. Therefor I do not
believe, that you should look for the problem in the immobiliser, but
in the fuel pump circuit instead (but I cannot be sure).
As also said, I do not know the W210 circuits, but I am quite
confident, that the fuel pump relay is controlled by the ECU. Since
disconnecting the battery for a while will allow the fuel pump work, I
assume that the fuel pump relay circuit is OK, and you should therefor
look for the reason why ECU does not swith on the relay. Maybe someone
else can help you out there (I don't know the logic to switch it on...
in W210 that is).
Is it W124 or W210 body (old or new generation), and is it original or
I don't know the original, but I know immobilisers in general.
1-way immobiliseres typically only switch off ignition circuit. 3-way
immobilisers switch off ignition circuit, starter circuit and fuel
Since starter circuit works but fuel pumps don't, I would look in the
fuel pump circuit.
Under all circumstances, get the immobiliser reset.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.