Was there a "cheap" OBC option???

[granit_silber]

Was there a cheaper OBC option for our cars or were all of them the same.
My 5'er was manufactuered in 3/92.

I ask because
1) Parked ventilation doesn't work (will fix that this spring)
2) None of the tests work

I can get test to readout on the display and even change the test number, buit when I push S/R I get nothing but the time.

Am I doing something wrong? Do I need to hold my tongue a different way???
-ashley

[Jay 535i]

I think parked ventilation doesn't work in early cars, despite it being talked about in the owner's manual. I can't get it to work in my '90 car.

Don't know about the tests.

Someone around here will know...

I believe the "cheap OBC" option was an analogue clock

[Torque]

Are you sure your OBC is unlocked?

As far as I know, most US models didn't have parked ventilation.

[ProZak]

FWIW, my parked ventilation works. 1995 525i.

[ProZak]

Rgh, meant to ask what you mean about OBC being "unlocked?"

[Qube]

You'll need to unlock the OBC first. Do a search for that here.

Ventilation is feature dependant. Mine has a timer instead of auto-vent.

[shogun]

Parked ventilation is described on Bruno's page how to insrtall and what is needed. If you do not know Bruno's page, link is on my website below.
OBC unlocking:
http://home.iae.nl/users/bts/obc.htm

[TWISM]

When you don't have parking vent in your car, you will have a timer.
If you DO have a parking vent, but not working. You won't have a timer.
Then goodluck with repairing the park vent.

And my guess about the test functions is, that I think your OBC is locked.
Unlocking is described in the link from shogun.

[crowegreg]

The OBC maybe locked, not allowing you to make any changes. Have you unlocked it? Do you have a printout of displays within the test mode?

[DanH]

I think all OBC's are the essentially same hardware internally, it just depends what things are connected to them to determine what features they will support.