Mopar PCM help request

[Terry_Sare at dell.com]

Check and see if your book wiring diagram list a CCD bus. If so, then all
the stuff in the instrument panel is driven by the engine computer through
that bus. I have a 98 Quad Cab and found this out when looking for the tach
signal. 

Anybody know anything about this bus -- it is 2 wire balanced pair, maybe
CAN or SCI protocol?


tks
ts

-----Original Message-----
From: Bob Tom [mailto:tigers at bserv.com]
Sent: Monday, January 18, 1999 5:06 PM
To: diy_efi at efi332.eng.ohio-state.edu
Subject: Mopar PCM help request


Hi, everybody.

I have a 1997 Dakota, 5.2L, auto. and, because Mopar
Performance does not have a performance computer out for
the 97+ Daks, I did as much research as I could and decided
to gamble on the MP performance computer for the '96 Dak.
Both are OBDII and, except for the major design and minor suspension
changes, everything seemed the same.

I received the computer last week and tested it today.  The performance
function seems to work fine but the gauges (water temp., oil pressure,
tach., battery, etc.) do not work at all.

My knowledge in this area is fairly elementary.  I have the '97 service
manual and am going over the wiring diagrams looking for possible fixes.

Any ideas or resources that I can look at would be greatly welcomed
and appreciated.

Bob
Burlington, Ont.