Solution to non-functioning panel gauges.

[Matt S Bower]

My understanding of the CCD is that the data is sent out by all of the
different computers and read by the pcm which in tern sends them back
out for the other devices to read.  Don't ask me why I always thought it
was a waste.  But in that case if you '96 pcm doesn't send the data out
your not going to get it working easily.  The way I have seen some R/E
work arounds is to split off the inputs to the '97 and let it run the
bus like normal but not run the controls.  

Have fun
Matt

Bob Tom wrote:
> 
> I am looking for any advice/comments on getting the instrument
> panel gauges to function which resulted from a PCM swap.  I believe
> this is topic-related; more on the diy side than the efi side.
> 
> Situation:
> I have replaced a '97 PCM with an '96 MP high-performance PCM.
> Both PCMs are ODB-II.  The performance gain is significant (.7 sec.
> off e.t., 5 mph trap gain) but the panel gauges (water temp./
> oil pressure/gas level/speedometer/tachometer) are not functioning.
> I've done this because MP has not put out a '97 hipo PCM and
> I'd like to achieve a 1/4 mi. e.t. goal that I have in mind.
> 
> Analysis from FSMs:
> The '96 Dakota's gauges receive signals either from the PCM
> or directly from the sensors.  The '97 Dakota's panel gauges
> receive signals via the CCD bus from the Central Timer Module
> which, in turn, receives signals via the CCD bus from the PCM.
> These signals come from two pinouts in the PCM (CCD+ and CCD-
> pinouts).
> 
> Conclusion:
> The Central Timer Module is not receiving any signals because
> the '96 did not use a CCD bus system.
> 
> Question:
> Would the following idea be a possible/simple solution?
> Use the datalink connector (the one in which a diagnostic
> tool is connected) and route the above-mentioned signals
> (assuming that they are there) to the Central Timer Module?
> 
> Any comments or other suggestions would be greatly appreciated.
> 
> Bob
> Burlington, Ontario
> 
> '97 CC Sport, 5.2L, 3.55, auto., 4x2