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ecu and welding

Posted: Tue Apr 01, 2014 9:06 am
by Paulinwales
Planning on doing a bit of weld repair on underside near exhaust (So well away from battery) where is the ecu located and how best to isolate it incase of harm?

Ps I have read around and some recommend disconecting battery and others suggest keeping it on as it absorbs any spikes any opinions. I have leisure battery also .
Thanks in advance Paul

Re: ecu and welding

Posted: Tue Apr 01, 2014 10:57 am
by winchman
I always disconnect the earth as the battery is 12v welders can be different voltages but many are 50-80V.

Re: ecu and welding

Posted: Tue Apr 01, 2014 11:43 am
by teenmal
What welder are you planning to use.

Re: ecu and welding

Posted: Tue Apr 01, 2014 7:46 pm
by Paulinwales
Mig

Re: ecu and welding

Posted: Thu Apr 03, 2014 9:53 am
by teenmal
Personally I would disconnect both the battery and the PCM, it is situated behind the glove box.

Re: ecu and welding

Posted: Fri Apr 04, 2014 8:32 pm
by Paulinwales
Whats the pcm? My bongos a 95 diesel

Cheers for input so far.

Ps I have 2 batteries do I disconnect both? And why?

Re: ecu and welding

Posted: Sat Apr 05, 2014 9:07 am
by teenmal
PCM =Powertrain Control Module, some peeps call it ECU.

I would personally disconnect all the batteries, it might sound a bit OTT but I would also unplug the Alternator.

Re: ecu and welding

Posted: Sat Apr 12, 2014 9:45 am
by redalan1971
The earth leads must be disconnected from both batteries or the welding current will flow to them. Big risk of them exploding.

Re: ecu and welding

Posted: Tue Apr 29, 2014 4:02 pm
by Paulinwales
cheers guys will do
looked for ecu thing by glove box seen some diagnostic looking connectors any tips on how tofind the thing . I think i'll play safe with that also

cheers Paul

Re: ecu and welding

Posted: Tue Apr 29, 2014 8:41 pm
by Simon Jones
As mentioned above, there isn't a ECU as such on earlier diesel Bongos but the control box(es) for transmission etc are under the dashboard:

http://lushprojects.com/bongopartsmk2/c ... mgno=.html

May also be worth disconnecting the airbag controller too (if fitted).