TEMP issue on OBC

Post Mon Jul 25, 2005 12:18 pm

Hi Guys
Just wanted to know if any of you guys had this problem before, my temp displayed on my OBC is -30 degrees, everything else is fine, but this damn - 30 is pissing me off!

My car is a 1991 325i Baur Convertible

Post Mon Jul 25, 2005 12:45 pm

The sensor (or wiring to it) is just dead. It sits somewhere in the left lower front valance (in the brake duct on your model I think).

Post Mon Jul 25, 2005 12:48 pm

I have this problem as well - i started working for a while - then it stoped.

Let me know - if you can - how u fix it - if u doo

Post Mon Jul 25, 2005 2:39 pm

If the obc is fitted as standard you have a temp. sensor loom that joins 2 wires to the main loom (blue and black as far as I can remember are the colours for the temp sensor.)
It sounds like you have a break in the circuit between the main loom and the temp. sensor or else the sensor has gone faulty. On the post facelift cars you'll find thre sensor plugged into the top of the near side brake cooling duct. Cuuld be that a bit or contact cleaner on the plug that joins sensor to temp sensor loom will do the trick,

If the obc was fitted afterwards by an E30 enthusiast it could be that the external temp sensor and loom is missing, this would also give the -30 display.

Good luck

Post Wed Jul 27, 2005 7:06 am

Wow , thanks , guys. I will play around with it this weekend. Will post a reply if it works.

Post Sun Aug 07, 2005 4:53 pm

Well had some time todya so i decided to get under the car and check it out.....and guess what? I know now why my Temp is not working, the sensor the cable should be plugged into is bloody missing!!!!

gone phone a BMW dealership tomorrow to find how much $$$