2001 caravan no start

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> > > > > > > > > "newrebel" > wrote in message
> > > > > > > > > ...
> > > > > > > > > > I have a 2001 caravan 3.3l in the shop at the moment
that
> > will
> > > > > crank
> > > > > > > but
> > > > > > > > > > will not start. trouble codes are p0351, p0352, and
p0353.
> > all
> > > > are
> > > > > > > > active
> > > > > > > > > > and relate to the ignition coil primary circuits. when
> > > checking
> > > > at
> > > > > > > coil
> > > > > > > > > pack
> > > > > > > > > > 4 way connector when disconnected I have ASD control
when
> > > > > cranking
> > > > > > > but
> > > > > > > > no
> > > > > > > > > > pulse at primary circuit drivers. have checked drivers
at
> > pcm
> > > > > > > > connectors
> > > > > > > > > > and still no pulse. scoped cam and crank sensors which
> give
> > > good
> > > > > > > > patterns
> > > > > > > > > > and are in sync as verified with DRB scan tool. fused B+
> and
> > > ASD
> > > > > > > control
> > > > > > > > > at
> > > > > > > > > > PCM and both ground circuits for PCM check out ok. any
> > > thoughts
> > > > > guys
> > > > > > ?
> > > > > > > > > > cheers the rebelmc.
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > Assuming you have 12volts at the ASD relay output. Crank
the
> > > > engine
> > > > > > for
> > > > > > > 5
> > > > > > > > > seconds as you check the ignition coil driver circuit,
the
> > test
> > > > > lite
> > > > > > > > should
> > > > > > > > > flicker, If the lite flickers while cranking but wont
start,
> > > > replace
> > > > > > the
> > > > > > > > > coil.If it does not flicker measure the ignition coil
driver
> > > > circuit
> > > > > > > from
> > > > > > > > > the coil to the PCM. The resistance should be below 5.0
> ohms.
> > If
> > > i
> > > > t
> > > > > > > isn't,
> > > > > > > > > repair the wire. If it is below 5.0 ohms measure the
> > resistance
> > > > > > between
> > > > > > > > the
> > > > > > > > > ground and the ignition coil driver circuit, If the
> resistance
> > > is
> > > > > > below
> > > > > > > > 100
> > > > > > > > > ohms repair the coil driver circuit for a short to
ground.If
> > it
> > > > > isn't
> > > > > > > > below
> > > > > > > > > 100ohms replace the PCM
> > > > > > > > >
> > > > > > > > > Glenn Beasley
> > > > > > > > > Chrysler Tech
> > > > > > > > >
> > > > > > > >
> > > > > > > > Hi Glenn. driver circuits check out ok and there is no
short
> > to
> > > > > > ground.
> > > > > > > I
> > > > > > > > have tried a new PCM as I came to the same opinion as
> yourself.
> > > did
> > > > > not
> > > > > > > > mention it in the previous post as I was not wanting to
> > influence
> > > > any
> > > > > > > reply.
> > > > > > > >
> > > > > > > >
> > > > > > > Were you cranking the engine when you were checking the coil
> > driver
> > > > > > circuit?
> > > > > > > You may want to go back and retest the system
> > > > > > >
> > > > > > > Glenn
> > > > > > >
> > > > > >
> > > > > > Yes Glenn it was during cranking that I tested it. it all points
> to
> > > the
> > > > > PCM
> > > > > > not grounding the driver circuits but as I have replaced the
PCM
> I
> > am
> > > > at
> > > > > a
> > > > > > loss. I was wondering whether the car has some sort of
> immobiliser
> > > > > > installed but as there is a good crank/cam signal and ASD
control
> > > > circuits
> > > > > I
> > > > > > cannot see how it would operate.
> > > > > >
> > > > > >
> > > > > nope!! and you are getting fault codes to point you in the
direction
> > of
> > > > the
> > > > > problem
> > > > >
> > > >
> > > > don't know if you gathered but I am in the UK and this car is US
spec.
> > is
> > > > the PCM plug and play or is there some form of configuration
> required.?
> > I
> > > > have programmed the VIN but not sure of any other procedure. we have
> > skim
> > > > security in UK but this car does not have a skim module or at least
> DRB
> > > says
> > > > not.
> > > >
> > > >
> > > If you have a gray key it has skim. But still, if it had skim, the
> > vehicle
> > > would start and shut off if the skim wasn't programmed.You have a no
> start
> > > problem. Did you install a new/reman PCM or swap out from another
> vehicle?
> > >
> >
> > Black key , good point about the start and stall. the PCM is a new
> > replacement from Chrysler.
> >
> Just had another thought. I wonder if the coil pack is bad and has damaged
> the new PCM to produce the same symptom.
>
>
You could have a bad reman PCM , they are purely junk, I have had so many
"Reman" PCM's with problems after I installed them either causing another
problem or the same problem I had before installing them. Chrysler has an
after market company "claiming they rebuild these things" Like most of the
aftermarket parts rebuilder they clean em up, paint em and ship em back out
to the shelves