What is This for ?

Talk about your cars etc here. Keep it sort of sensible and on topic please.
User avatar
FatherJack
Posts: 1165
Joined: Sun Nov 21, 2021 10:49 pm
Location: Yeah, but No, but mostly No
Has thanked: 112 times
Been thanked: 655 times

What is This for ?

Post 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
Image

A less blurry picture of it at rest, bolted to the outside of the thermostat housing
Image

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.
SiC
It's S small i C
Posts: 9246
Joined: Sun Apr 28, 2019 8:59 am
Has thanked: 1805 times
Been thanked: 5250 times

Re: What is This for ?

Post by SiC »

Open circuit one way and closed the other?
I.e. a diode.
User avatar
PhilA
Posts: 2926
Joined: Thu May 30, 2019 1:24 pm
Location: Larose, LA, USA
Has thanked: 915 times
Been thanked: 6446 times
Contact:

Re: What is This for ?

Post 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
Pontac Cheepten
Plymmut Furey
User avatar
Eddie Honda
Rainman The Google Fu Master
Posts: 21167
Joined: Tue Apr 09, 2019 10:45 pm
Location: 寄居町
Has thanked: 13144 times
Been thanked: 12814 times

Re: What is This for ?

Post 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
User avatar
Eddie Honda
Rainman The Google Fu Master
Posts: 21167
Joined: Tue Apr 09, 2019 10:45 pm
Location: 寄居町
Has thanked: 13144 times
Been thanked: 12814 times

Re: What is This for ?

Post 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/ :lol:
User avatar
christine
Posts: 4180
Joined: Wed Apr 10, 2019 9:50 pm
Has thanked: 1305 times
Been thanked: 1669 times

Re: What is This for ?

Post by christine »

Stalker !
User avatar
FatherJack
Posts: 1165
Joined: Sun Nov 21, 2021 10:49 pm
Location: Yeah, but No, but mostly No
Has thanked: 112 times
Been thanked: 655 times

Re: What is This for ?

Post 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.....
Attachments
lancer_srs_airbag.jpg
lancer_srs_airbag.jpg (115.31 KiB) Viewed 696 times
User avatar
FatherJack
Posts: 1165
Joined: Sun Nov 21, 2021 10:49 pm
Location: Yeah, but No, but mostly No
Has thanked: 112 times
Been thanked: 655 times

Re: What is This for ?

Post 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.

Image

I am not a Winner as I probably left the bloody thing disconnected in all the excitement.
User avatar
Eddie Honda
Rainman The Google Fu Master
Posts: 21167
Joined: Tue Apr 09, 2019 10:45 pm
Location: 寄居町
Has thanked: 13144 times
Been thanked: 12814 times

Re: What is This for ?

Post 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.
User avatar
PhilA
Posts: 2926
Joined: Thu May 30, 2019 1:24 pm
Location: Larose, LA, USA
Has thanked: 915 times
Been thanked: 6446 times
Contact:

Re: What is This for ?

Post 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
Pontac Cheepten
Plymmut Furey
Post Reply