ecu and welding

[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

[winchman]

I always disconnect the earth as the battery is 12v welders can be different voltages but many are 50-80V.

[teenmal]

What welder are you planning to use.

[Paulinwales]

Mig

[teenmal]

Personally I would disconnect both the battery and the PCM, it is situated behind the glove box.

[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?

[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.

[redalan1971]

The earth leads must be disconnected from both batteries or the welding current will flow to them. Big risk of them exploding.

[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

[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).