Troublesome onboard computer on 1991 325i

[Christopher Pawlowicz <chrisp@xxxxxxxxxxxxxxx>]

rudolf kruger sez
>I have a 1991 model 325i with an onboard computer that is not working
>properly. Pressing the buttons for speed, consumption or distance

>also work. A friend's 325i (1990) has functions to display the version of
>software and the amount of fuel in the tank, which mine either does not have
>or is also malfunctioning.

not sure what the problems are with your OBC.. 
to check fuel level press 1 and 1000 at the same time


>
>Another problem is the if the car is double locked (dead-lock), one can
>still unlock the passenger side door and boot, so it seems to be
>malfunctioning as well.

deadbolting 
a) mechanically locks drivers door so that it can only be opened with the key
b) electronically locks passenger door(s) so that they can only be unlocked
  if the drivers door is unlocked with the key
c) trunk is not part of the deadbolt system and can always be unlocked

check my FAQ at
ftp://ftp.doe.carleton.ca/pub/chrisp/bmw/central.lock.faq or
ftp://ftp.doe.carleton.ca/pub/chrisp/bmw/central.lock.pdf

most likely it is the electronic signal not getting from the drivers lock
cylinder to the central lock computer.. either the microswitch in drivers
 door is not being engaged or the A pillar connector has corrosion inside..

>3) Does anybody have any upgrade software that one can perhaps program into
>the old CPU ?

not possible


chris pawlowicz
'89 325i
'74 2002

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