Hi this is my first forum and my first 24v. I've heard that theirs a way to eliminate  the pcm can anyone fill me in I would greatly appreciate  any info 

I cant say that I have ever heard of that nor do I think it is possible. Why do you want to eliminate it?   

I think you would have to p pump it. Not really sure though as the pcm controls other parts of the truck. 

No way to remove the PCM. Its the master computer. Without it the rest of the truck fails. 

 

2 hours ago, mossyoak71 said:

I think you would have to p pump it. Not really sure though as the pcm controls other parts of the truck. 

 

The only thing p-pump does is remove the VP44 you still need the ECM.

Yep no way to remove it.  The truck would barely function, if at all.

 

Ok.

 

PCM is the master computer

ECM is the secondary computer

 

PCM uses ECM and ABS.

Cruise control uses ABS signal. (Either pass to the ECM or vacuum motor)

Security feature PCM gets do not start signal and sends to the ECM.

Cluster requires ECM, PCM, and ABS. 

Cluster gets the coolant temperature oil pressure, and the tach from the ECM.

Cluster gets the fuel level and the voltage from the PCM

Cluster gets the speed from the ABS. 

ECM requires PCM and ABS module.

ABS control the grid heater canceling. 

Radio requires Central Timer (Steering wheel controls).

Central Timer Requires PCM (security feature).

Overhead console requires PCM.

 

All p-pumping the engine does is remove the VP44. You still need the ECM for the cluster to display gauge functions. Remove the PCM the whole system dies and the truck won't function.

 

This why the two codes tend to prevent function of the truck typically.

 

 

Edited June 10, 20187 yr by Mopar1973Man