OBC IV & reset

[amppa]

I made a reset (Test 21) to my OBC IV by mistake. Now there is "pppp" on
display and only button that works is S/R. It flashes display.

What can I do? Do I have to buy a new code plug?

-amppa

[vadim_braia]

You need just to start the engine

[amppa]

You need just to start the engine

What, why? Well, I tried. It didn't help.

[amppa]

I read coding plug and the result is:

00'55'00'00'78'98'3B'5D'14'10'AD'7B'E4'D0'FF'FF'
D2'CB'01'00'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'
FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'
FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'
FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'
FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'
FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'
FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'FF'

There seems to be 20 bytes of data. Is that enough? Can anyone tell my data is correct?

[emw525E34]

Do the reset sequence on your ECU.
1) Step 1. Remove both + and -ve battery terminals. Yes. Undo the bolts until cables hang loose. Put +ve and -ve cables together for 5 seconds.
this fully discharged caps in the electricals.
My Tech did this several times before.

2) Put -ve On the battery first, then the +ve terminal. Fasten tight. Start the car. PPPP might just get on for a few seconds then, OBC will prompt for clock input. fixed. Good luck.

[amppa]

Thanks for help. I have to try that.

I already had OBC out of the car over night and that didn't help.

[amppa]

Now I've reseted ECU. It didn't help. Still PPPP.

[Ova]

Try this...

http://www.bmwe34.net/e34main/upgrade/OBC.htm

[amppa]

Try this...

http://www.bmwe34.net/e34main/upgrade/OBC.htm

Try what in it?

I've made OBC upgrade long time ago. It worked well until I made reset (Test 21) from hidden menu:
http://home.iae.nl/users/bts/obc.htm

That reset screwed coding plug somehow, I think. I don't know the initial values for E34 M51D25.

[amppa]

Now my OBC is working. I had to reprogram the coding plug.