I've searched and searched and got just as many different answers.
What does the ecu-b fuse that is located in the frunk do?
I've seen everything from abs, dash cluster, ac, fog lights and so on.
Cheers.
Sw20 ecu-b fuse
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Sw20 ecu-b fuse
by MR2SIK » Fri Jul 19, 2013 8:49 pm
2011 Ford Mondeo tdci.
Hey, at least it sounds like a 3s.
1990 MR2 GT garage queen
Hey, at least it sounds like a 3s.
1990 MR2 GT garage queen
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by Lloyd » Fri Jul 19, 2013 9:08 pm
I know this is for a Camry, but it may give you an idea.
http://www.autoshop101.com/forms/92camry.pdf
Pages 22-25 of that PDF would suggest it ties in to the diagnostics plug and some of the ABS/SRS system, possibly only warning lights or relay feeds.
http://www.autoshop101.com/forms/92camry.pdf
Pages 22-25 of that PDF would suggest it ties in to the diagnostics plug and some of the ABS/SRS system, possibly only warning lights or relay feeds.
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by Grrrrrrr! » Sat Jul 20, 2013 12:59 am
Wiring diagrams for US market sw20 suggest:
Diagnostic connector, ABS and Airbag ECU backup power.
Diagnostic connector, ABS and Airbag ECU backup power.
Reality: A nasty hallucination that is caused by excess blood in the alcohol stream.
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by MR2SIK » Sat Jul 20, 2013 1:49 am
Just Asking as my car has no fuse in there 
Service records mentioned a 'leak' was traced back to it around 2006.
Guessing it was an electrical drain on the battery?
Everything seems to work fine.
Service records mentioned a 'leak' was traced back to it around 2006.
Guessing it was an electrical drain on the battery?
Everything seems to work fine.
2011 Ford Mondeo tdci.
Hey, at least it sounds like a 3s.
1990 MR2 GT garage queen
Hey, at least it sounds like a 3s.
1990 MR2 GT garage queen
-
MR2SIK - Toyspeed Member
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- Location: Christchurch
by suprra_girl » Sat Aug 10, 2013 7:56 pm
They probly cut that part of the circuit out and jumped it to +b1 (it probably joins to there further on in the circuit anyway) which supplies the diagnostic connector, ecu, junction block in the kickpanel (presuming it's in there somewhere, going off mk3 experience here lol). Easy way to check is see if there's 12v at +b in the diagnostic box.
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suprra_girl - Toyspeed Member
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by matt dunn » Sat Aug 10, 2013 9:00 pm
I doubt there will be power at the diagnostic connector if it is the square box one,
they are only powered with the key on.
The US market would have had an ODBII plug which requires a permanent power feed.
they are only powered with the key on.
The US market would have had an ODBII plug which requires a permanent power feed.
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by suprra_girl » Sat Aug 10, 2013 11:47 pm
Sorry I should have elaborated on that
Check to see if there is 12v at the diagnostic box with the ignition on.
Check to see if there is 12v at the diagnostic box with the ignition on.
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suprra_girl - Toyspeed Member
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