OBC Retrofitt

Post Sat Dec 17, 2005 7:51 pm

Can someone confirm or deny this please.

I do not need to connect the small white double green wire plug from the OBC harness to the car harness unless i am using the Code function on the OBC.

Whats the twin red/white trace in the OBC loom for, as i forgot to take a piccy of the connection before i removed it from the donor car.

I am not using/installing the Aux horn with the OBC.

Post Sat Dec 17, 2005 8:04 pm

try this!

http://www.e30zone.co.uk/modules.php?na ... troobc.htm

Did it take long to fit> I', looking at doing this to mine.. If I keep it!

Post Sat Dec 17, 2005 8:19 pm

the article guide has no mention of a plug with a twin red/white trace wire.

Post Sat Dec 17, 2005 9:02 pm

These are the connectors in question.

The top one has two Red/White Trace (on one connection). Whats this for ?

The bottom one is for the CODE fuction/Immobiliser ? Can i leave this dissconnected ?

Post Sat Dec 17, 2005 9:08 pm

Your so going to regret fitting this when you have a bigger engine as all it will ever say is.........18 mpg to you.

Post Sat Dec 17, 2005 9:08 pm

The red/white connector, would plug into the junction box above the glovebox, you do not need to plug in the wire for the code function, the OBC will work fine without it.

Post Sat Dec 17, 2005 9:22 pm

Last Question.

The coding plug in the back of the OBC, does it need to be changed for different engines ?

The OBC was original fitted into a 320i, no going into a 325i.

Post Sat Dec 17, 2005 9:33 pm

kam-325i wrote:Last Question.

The coding plug in the back of the OBC, does it need to be changed for different engines ?

The OBC was original fitted into a 320i, no going into a 325i.

Fancy a swop?

They do need to be changed for different engine sizes, but it's not like the OBC is very accurate anyway!

Post Sat Dec 17, 2005 9:36 pm

You want the coding plug for an M20B20 ?

If you want to swap for a M20B25 one.....

(Coding plug for the OBC, Not the dashborad)

Post Sat Dec 17, 2005 9:39 pm

Yes, I have a 2.5 coding plug in my 2.0, I shall have a look tomorrow to see if I can remove it easily enough and shall let you know.

Post Sat Dec 17, 2005 10:14 pm

OK, will do.

The plug is VERY Tight.
Mine has 4 4 Typ, 1385939, 9.89 on the back

Post Sun Dec 18, 2005 2:30 am

Just to let you know Si, i have checked the part number on the plug (1385939) and it is for a 320i, the coding plug i need should have 1385941 on the back.

Post Sun Dec 18, 2005 9:24 am

Cheers, I'll check it out today, and get back to you