Series 60, DDEC 4, Check engine light

[David Brady]

It may mean high, or overspeed. The flash code associated
with the message is 64 which my ddec 4 manual translates
to "turbo overspeed".

The "turbo speed sensor low" message was read from the
J1939 port. I think the "low" portion of the message means
voltage low, and low voltage in this case corresponds to turbo
overspeed, which may be a problem. In high altitudes, the turbo
can make up for thin air by spinning faster (to a degree). I don't
think my turbo has a waste gate, so I'm not sure what would
prevent it form overspeeding.

I might be in love with the sound of the jake...

David

Gregory OConnor wrote:
>
> high would be a problem (Why use high and low and not fast and
> slow??) low might mean an injector is pissing and the turbo is
> spinning slow in relation to fuel??
> Are you one of those guys in love with the sound of the Jake? they
> make heat and stress.
> the other thing is how does Ddec account for the thin air up
> there, ???
>
> surf around on this site for forum threads on series 60 under
> transportation trucks and busses
> http://www.answerba g.com/ <http://www.answerbag.com/>
>
> Greg
>
> --- In WanderlodgeForum@ yahoogroups. com
> , David Brady
> wrote:
> >
> > Folks,
> >
> > On my way up Vale Pass, near the Eisenhower Tunnel, my check
> engine
> > light came
> > on and my DDEC displayed:
> >
> > PID 103, MID 128, FMI 1
> >
> > Which decodes to "turbo speed sensor low". I'll take it to the
> local
> > Detroit Service
> > Center here in Denver, but in the meantime, does anyone have an
> idea of
> > what this
> > could be?
> >
> > Thanks,
> > David Brady
> > '02 LXi, CO
> >
> >
> > --
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No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.524 / Virus Database: 270.6.21/1674 - Release Date: 9/16/2008 8:15
AM