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What is This for ?
Posted: Tue Aug 09, 2022 6:57 pm
by FatherJack
When you move house and everything is a bit unfamiliar, you look around and sometimes you find a switch on the wall with no clear purpose.
All the other switches are obvious and work as expected...
I have a switch or sensor thing just like that under the bonnet of a Mitsubishi Lancer
A blurry picture of it removed
A less blurry picture of it at rest, bolted to the outside of the thermostat housing
Its open circuit on a meter and I'm looking around for a cause of odd running, the electric fans come on the moment the key is turned,
unless its a rare day when they dont.
Re: What is This for ?
Posted: Tue Aug 09, 2022 7:54 pm
by SiC
Open circuit one way and closed the other?
I.e. a diode.
Re: What is This for ?
Posted: Tue Aug 09, 2022 8:34 pm
by PhilA
150 Ohm resistance plus 0.5uF capacitor in series?
Snubber for noise suppression at a guess. If your meter can read capacitors select that and test between the connectors.
Phil
Re: What is This for ?
Posted: Tue Aug 09, 2022 8:58 pm
by Eddie Honda
PhilA wrote: ↑Tue Aug 09, 2022 8:34 pm
Snubber for noise suppression at a guess.
Yes it's just a condenser for noise suppression.
Mitsubishi part number MR472444
Re: What is This for ?
Posted: Wed Aug 10, 2022 6:39 am
by Eddie Honda
You'd have got an answer on TDW 7 weeks ago if you'd only asked....unlike asking:
https://www.mitsubishi-forums.com/threa ... or.262069/
Re: What is This for ?
Posted: Wed Aug 10, 2022 6:52 am
by christine
Stalker !
Re: What is This for ?
Posted: Wed Aug 10, 2022 10:37 am
by FatherJack
Yeah, I confused an enthusiast forum with a source of knowledge but there are some unintentionally funny threads on there.
"My airbag light is on, some parts are missing"
https://www.mitsubishi-forums.com/threa ... ost-552894
The fix.....
Re: What is This for ?
Posted: Fri Aug 12, 2022 1:43 pm
by FatherJack
PhilA wrote: ↑Tue Aug 09, 2022 8:34 pm
150 Ohm resistance plus 0.5uF capacitor in series?
Snubber for noise suppression at a guess. If your meter can read capacitors select that and test between the connectors.
Phil
Feeling rebellious today, so I dragged my covid self into the glorious sunshine armed with a test meter
PhilA is a WINNER!
Eddie Honda is runner up.
I am not a Winner as I probably left the bloody thing disconnected in all the excitement.
Re: What is This for ?
Posted: Fri Aug 12, 2022 1:57 pm
by Eddie Honda
PhilA wrote: ↑Tue Aug 09, 2022 8:34 pm
150 Ohm resistance plus 0.5uF capacitor in series?
I would have thought 150V marking rather than resistance.
Re: What is This for ?
Posted: Fri Aug 12, 2022 2:11 pm
by PhilA
Noise suppression usually involves a sink point through a filter and resistance, that's a fairly nominal set of values.
The ones we have at work for shutting up squealing phone lines range from 0.1u/300R to 1u/100R
I wouldn't expect voltage ratings on sandwich caps like that, though it's likely rated to about 300V