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I dont have a 12valver but do 2nd gen 12v have a ECM? along with a PCM?

 

Is 12v ECM similar to the 98-2001 but just without injector pump electronics part

 

I have a '99 CTD.

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10 minutes ago, dripley said:

PCM maybe?

 

Probably what he ment

 

Got me wondering,,,, how a 96-97 12 valve PCM compares to a 98-99 PCM,, on a 24 valve that also has a ECM

 

 

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Way different...

 

24V PCM is all set up with CCD networking and being able to talk to several modules all at once. Now the 12V PCM is pretty basic and doesn't have CCD networking. Everything basically is hard-wired from point to point. 

 

24 Valve CCD network.

ccd network wiring

 

Now look back at just the 12V cluster way different...

Instrument cluster wiring map 1994 Dodge Ram

 

Now the 24V cluster... Basically two wires deliver all the data for the cluster. 

Instrument Cluster (Page 1) wiring map 1999 Dodge Ram

 

Just looking at the PCM of a 12V you got the grid heater and other stuff that is typically on the ECM of a 24V

Engine wiring map 1994 Dodge Ram

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Quote

Just looking at the PCM of a 12V you got the grid heater and other stuff that is typically on the ECM of a 24V

 

On my '99, The grid heater and "wait to start" light , is what got me wondering if those were on a 12er PCM where a 24er these are on the ECM.... and etc

 

Since Im waiting for my new ECM to arrive for my '99 which is having ECM boot up delays

 

Mike, what does CCD stand for?

 

.

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Just hover your mouse pointer on the CCD (dotted underlined acronyms) and the full definition will display. 

 

ccd.png

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Little bit off topic.  Those wiring maps are good.  Couple months ago one was posted here ...i sent it to my local staples.  They printed it out to default size and laminated it.  Picked up a mailing tube to store them in. Now I can read without magnifying glass.  I keep it under rear seat along with Carter back up fuel pump.  Ended up full size about 24 X 18 inches.  

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Chrysler Crash Detection ?

 

As in dented fenders vehicle crash accident ,,, or,,, computer crash/failure

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CCD (Chrysler Collision Detection) Data Bus

The Chrysler Collision Detection (also referred to as CCD or C2D ) data bus system is 
a multiplex system used for vehicle communications on many Chrysler Corporation vehicles.

Within the context of the CCD system, the term “collision“ refers to the system’s ability 
to avoid collisions of the electronic data that enters the data bus 
from various electronic control modules at approximately the same time.

Edited by Chris O.
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