obc displays P.P.P.P.P. - BMW Forum

jimhorton1963 · 03-14-2006, 04:50 AM

my obc started to display P.P.P.P.P. none of the buttons work. has anyone ever seen this? what does it mean and how do i fix it. help, its my sons favorite gizmo on the whole car. 1987 325is

JoeMadoo · 03-14-2006, 06:05 PM

Hmm... I've never seen that before, it may have just taken a dump. You can get them for next to nothing on ebay, it's kind of a pain to install though. I acutally have an extra one if you'd like to buy it.

Bear · 03-14-2006, 06:26 PM

Try turning the ingnition key to on so radio and OBC light up (not the instrument cluster) and then push the code butoon and then using a ball point pen push the reset button on the OBC until you get a time/date request and see if that works (recodes the system). I have also heard that with igniton on pulling fuse 21 and then repalcing it may work.

jimhorton1963 · 03-14-2006, 08:07 PM

i will give the recode a try, i had just unpluged the thing because we were tired of looking at it. well here goes the dash again.

fporro · 03-14-2006, 11:45 PM

Quote:

Originally Posted by jimhorton1963

i will give the recode a try, i had just unpluged the thing because we were tired of looking at it. well here goes the dash again.

Jim,
it means that there was a voltage spike, do disconect it, then, remove the code plug from back side (white plug).

reinstall plug, reconnect obc and it should fire back up.

jimhorton1963 · 03-15-2006, 05:13 AM

ah ha, voltage spike. could this be a early warning sign of an alternator or voltave regulator failure?

fporro · 03-18-2006, 03:25 PM

could be something as simple as a loose battery connetor or loose ground.
i seen this many times.

did you fixed it ?

jimhorton1963 · 04-06-2006, 10:12 PM

well i have tried the recode, and tried remove and reinstall the plug but no help. i removed and dissambled the obc and found corosion all over parts of the circut boards. this will be tough to clean up because the three boards are soldered to a small mother board and can not be seperated easilly. this was a similar problem when my s.i. board was acting up. i have found corosion on most of the electrical things that have given me problems. mabey my car was a submarine in a previous life.