JTEC 47RE Support?

[cumminsturbofreak]

Hi all, is there any support for the 98-02 JTEC Diesel TCM? I?d imagine the software would be similar to the gas units but with engine controls turned off.

There?s a lot of weirdness with the converter and cruise control parameters I?d like to change. I don?t use HPT, but I will buy if it works.

Thanks

[LilSick]

Works for me but I use windows 10 and MPVI2

[cumminsturbofreak]

Works for me but I use windows 10 and MPVI2

So you were able to successfully read and tune the JTEC transmission controller on the Diesel trucks? If so, would you perhaps have a stock hpt so I can see the options available?

I'm mostly after the TCC engage/release adjustments and cruise response and limiters... and that's if the parameters even work.


Thank you!

[LilSick]

the only diesels i tuned have p-7100 pump

ask jim

(in the diesel sub forum)

[Jim P 2.0]

I have zero clue about the 47RE if they can be read or not and tuned by HP Tuners

[LilSick]

and tbh i do not know if you can tune it with a mpvi3

i know you can with a 2

where is bill???


*maybe ask over here:

https://forum.hptuners.com/forumdisp...-Suite-General

[cumminsturbofreak]

So I picked up a used MPVI2, and I’m happy to report that yes, you CAN tune the JTEC PCM used for trans control on the Cummins trucks!

However, you will have an issue with failed reads/flash with Baud: Time Out. This is because Dodge put the SCI receive for the JTEC PCM as a white/violet wire in Position 14. The MPVI is expecting to see that SCI receive on position 6, where it is for the gas trucks. For the Cummins trucks, Position 6, dark green wire, is used for SCI Receive for the Cummins ECM. To work around this, remove the green wire from position 6 and move the white/violet wire from 14 to position 6 temporarily. This will allow MPVI to communicate with the controller properly.

Alternately, make an OBD jumper with 14 and 6 swapped for the JTEC PCM flashes only.

Hope this helps someone in the future!

[VPP1776]

So I picked up a used MPVI2, and I?m happy to report that yes, you CAN tune the JTEC PCM used for trans control on the Cummins trucks!

However, you will have an issue with failed reads/flash with Baud: Time Out. This is because Dodge put the SCI receive for the JTEC PCM as a white/violet wire in Position 14. The MPVI is expecting to see that SCI receive on position 6, where it is for the gas trucks. For the Cummins trucks, Position 6, dark green wire, is used for SCI Receive for the Cummins ECM. To work around this, remove the green wire from position 6 and move the white/violet wire from 14 to position 6 temporarily. This will allow MPVI to communicate with the controller properly.

Alternately, make an OBD jumper with 14 and 6 swapped for the JTEC PCM flashes only.

Hope this helps someone in the future!

Great information here, was just coming in to wonder out loud why I could read and write a gas PCM, but not a diesel. I will give this a try with my MPVI3 and report back for those who do not have an MPVI2

[VPP1776]

So I picked up a used MPVI2, and I’m happy to report that yes, you CAN tune the JTEC PCM used for trans control on the Cummins trucks!

However, you will have an issue with failed reads/flash with Baud: Time Out. This is because Dodge put the SCI receive for the JTEC PCM as a white/violet wire in Position 14. The MPVI is expecting to see that SCI receive on position 6, where it is for the gas trucks. For the Cummins trucks, Position 6, dark green wire, is used for SCI Receive for the Cummins ECM. To work around this, remove the green wire from position 6 and move the white/violet wire from 14 to position 6 temporarily. This will allow MPVI to communicate with the controller properly.

Alternately, make an OBD jumper with 14 and 6 swapped for the JTEC PCM flashes only.

Hope this helps someone in the future!

Just successfully flashed a 99 Cummins at the shop with Beta and an MPVI3 after I made an adapter harness for flashing. Thanks for the info!