> >
> > 1997 Dodge Intrepid, 3.5L, 225/60 R16 tires, w/o traction control > >
> > 3 different scanners were tried on the Intrepid:
> >
> > 1. a Harrison model which uses a PC or a Palm PDA as the read out device;
> > 2. a Actron CP9135, which Autozone uses; and
> > 3. the usit used at the Texas car emissions test facility.
> >
> > 1. and 2. both worked on other cars, 1996 and up.
> >
> > My big problem is that here in Texas, I have to pass an emissions test to
> get
> > the sticker and because they can't scan the PCM, they won't pass the car.
> >
> > Can you or anyone else do a quick resistance test between pin 6 (HIGH > signal
> > line) and ground? I get approx 15 ohms.
> >
> > If the cirsuit on the PCM that handles the interfacing from the outside > world
> > was defective then that would explain why the PCM could run the can fine > but
> > not talk to the scanner. What do you think?
> >
> > My last resort is to replace the PCM and/or the TCM. I am running out of > time.
> >
> > TIA
> > Bill
> >
> >
> >
> >
> >
> > > >
> > >
> > >> Glen,
> > >>
> > >> This is a followup to my last post. Thanks for the pin assignments.
> > >> I finally got around to test everything.
> > >>
> > >> All pins at the ODBII connector check out. I did both a continuity test
> > >from
> > >> the connector to the appropiate pins at the connectors to the PCM and > the
> > >TCM
> > >> units, and to the grounded pins. All wires checked out.
> > >>
> > >> I also did a resistance test between each non grounded pin to the other
> > >pins.
> > >> Results are:
> > >>
> > >> 5 to 6 ---> 14.94 ohms (ground to SAE J2284 high)
> > >> 5 to 7 ---> .13 ohms (ground to K Line of ISO)
> > >> 5 to 14 --> 0.00 ohms (ground to SAE J2284 low)
> > >>
> > >> Battery voltage at pin 16 is good.
> > >>
> > >> The scanner still won't sync with the PCM.
> > >>
> > >> What do you think? Bad PCM, TCM?
> > >>
> > >> The car runs good. I am at a loss.
> > >>
> > >> TIA
> > >> Bill
> > >>
> > >>
> > >>
> > >> > > >>
> > >> >
> > >> >Glen,
> > >> >
> > >> >Here is a more clear explanation.
> > >> >
> > >> >I plug in the Actron scanner, turn the key to ignition, and press read
> on
> > >the
> > >> >scanner. The scanner sits there for a about 30 seconds, and finally > > >displays
> > >> >"no response" from the pcm.
> > >> >
> > >> >Using another scanner (Palm PDM software and interface from Harrison
> > >(Houston,
> > >> >TX)), the software reposts "can't sync with the pcm".
> > >> >
> > >> >However, using the ignition key on, off, on 3 times method (to get the
> > >MIL to
> > >> >blink out any codes) works ok. Anf the can runs fine.
> > >> >
> > >> >It is like one or more of the PCM data lines to the data link > connnector
> > >are
> > >> >bad.
> > >> >
> > >> >Bill
> > >> >
> > >> >On Fri, 02 Sep 2005 05:37:42 -0400, "damnnickname"
> > >
> > >> >wrote:
> > >> >
> > >> >>First of all when you say it cant be read what exactly does that > mean?
> > >does
> > >> >>it not give you anything? does it say something like no
> communication?
> > >Or
> > >> >>is it just a blank screen?
> > >> >>
> > >> >>Glenn Beasley
> > >> >>Chrysler Tech
> > >>
> > >Have you tried to connect the scanner to another vehicle? Not sure what > kind
> > >of scanner it is, Does it do all years?
> > >And no I wouldnt replace modules based on that, if everything is working
> > >leave it alone
> > >
> >
> What do you have at pins 3 and 11 of the data link connector, key on voltage
> reading? 2.5 volts on both?
>
>
>
Ok disconnect the PCM and with an ohm meter test thes SCI transmit wire at the data link connector for a short to ground if the resistance is below 5 ohms repair that wire for a short to ground. if it is not shorted to ground test the SCI recieve wire at the data link connector for a short to ground. If that wire is not shorted to ground check the SCI transmit and recieve wire from the PCM to the data link connector for resistance. assuming that those wires are not broken or shorted to ground the PCM is no good sci recieve data link pin 6 sci transmit data link pin 7
sci recieve PCM connector pin 75 LG sci transmit PCM connector pin 65 PK