CUMMINS ECM REPAIR TIPS

[mondao]

I try to recalibrate a ecm ISX cm 871 , but no luck
someone has a part number for this bench?
i need bench harness used to calibrated isx cm 871

[jctech]

CAN SOMEONE PLEASE HELP ME TO UNDERSTAND WHAT IS A LINEHUAL INCAL AND A VOCATIONAL INCAL CALIBRATION
THANK YOU IN ADVANCE

Linehaul is for a highway truck
Vocational is for a vehicle like a cement mixer or dump truck

[jctech]

I try to recalibrate a ecm ISX cm 871 , but no luck
someone has a part number for this bench?
i need bench harness used to calibrated isx cm 871

The cable you need is 3164185,

[jctech]

trying to put QSOL screen shot into post
hopefully it will be below

[hercamp]

well..I ve seen a couple isx..that stop calibration transfer and never ..get connection again
try this...

connect the ecm to calterm through manual conection
if is possible with inline (80%) succefully...or usb link
you need to try to connect with ignition off...we do that because dont have rom boot pin out ..and off connection make that...too
if you cant until all that ...you will need to connect by j1939 ...triangle conector ..if your ecm is not burned..that will works 100%..and try to get connection
after that you can download calibration to the ecm.

is just my experience.

[jctech]

When you recalibrate an ECM, especially on J1939 datalink, you need to remove as much other datalink traffic as possible.
All the messages on the datalink have a priority, ABS and throttle usually have the highest priority, then dashboard, transmission and all the other modules using the datalink.
Insite has the lowest priority of all, because it must not interfere with the operation of the vehicle if used on a road test.
These modules are broadcasting as soon as they are powered up even if truck is not moving or the engine is not running.
Then we connect into the datalink and expect to be able to load a 2MB calibration into the ECM down that same busy datalink, at a lower priority than all the other data.........
Cummins recommends disconnecting as many other modules as possible when carrying out ECM recalibrations, to remove as much traffic from the datalink as possible, and for Celect plus, connecting to the service datalink on the side of the engine, not the public datalink in the vehicle cab.

[Juanincho]

The problem with this engine is when it warms to the normal engine temps, idle speed goes to 900 rpm. I don't know engine cpl, because it was repaired with different cpl parts. I tried 1844 cpl with a 3084473 ecm, it works fine, but it has a 3619037 ecm, any ideas?

[jctech]

The problem with this engine is when it warms to the normal engine temps, idle speed goes to 900 rpm. I don't know engine cpl, because it was repaired with different cpl parts. I tried 1844 cpl with a 3084473 ecm, it works fine, but it has a 3619037 ecm, any ideas?

You have the same question in the calterm thread, see the answer there

[joe gp]

hi guys

busy with engine simulation on Celects and Celct Plus on the bench.....been playing for a while now with signal generators and output-ing the signal thro a headphone jack on the EPS attached to my harness.....haven't had the best of luck so far......any ideas would be highly appreciated........

[jctech]

get hold of a camshaft gear, and spin it with a motor to give the ecm a speed and position signal.
You will need injector solenoids, all sensors need to be connected, but only oil pressure sensor needs its status to change to show oil pressure with the engine running

[Trucke]

Hello all Interesting thread going here. When calibrating it is best to use the dedicated data link in the engine harnes with the triangle deutch conector at the left front of the engine. Cummins makes an adapter cable to fit this. It fits on cummins inline adapters. It has the 3 pin plug and a power cord that plugs into a cigarete lighter plug. If you or your shop has an old echeck kit still around it may be with it. When I get some time I want to make an adapter to use this system with the nexiq usb link. Maybe sombody out there already made one and is using it? If you do have the Echeck kit and the diagnostics 2.0 cartridge blow the dust of it and you can read sids, mids and pids from almost any brand of engine with a 1708 datalink.Get some fault code lists printed out and your good to go. Great for monitering engine sensor outputs during road testing to no battery to die half way through. They also made a Echeck cartridge that fits the prolink might as well use them if you have them.
Great work on the dk forums guys Thanks lot of great info.

[donniemnemonic]

hi all I am new to all this but find Iam going to learn alot here. Gr8 thread you have here. dies anyone have schematic for serial cable that joins inline 5 adapter to pc comm port. Many thanks in advance

[hercamp]

the triangle adapter is for connect inline in j1939 and nexiq cant ..I did one with resistance but not stable connection and only possible with inline to safe mode ...and about squematic ...calu78 posted time ago a manual of dpa4 plus ..well is same db15 and usb,deutch conection than nexiq....see in the thread about squematic most be there.

[Juanincho]

the triangle adapter is for connect inline in j1939 and nexiq cant ..I did one with resistance but not stable connection and only possible with inline to safe mode ...and about squematic ...calu78 posted time ago a manual of dpa4 plus ..well is same db15 and usb,deutch conection than nexiq....see in the thread about squematic most be there.

hercamp, how'd you do it? I made a j1939 cable for the bench, for usb link, it works fine, I used a 120 ohm between the data lines, I'll try to post the schematic this week if you want it.

[hercamp]

I mean not good because after to load and download all blocks with usb link connection makes to burn a diode into usb link .works for a time but .I think for high baud and bits in the transfer ...resistance in the backbone works cool also if they are at 60 ohms but is just my experience...is safe and better to get same connection in j1708 also with faster transfer with usb link ...the j1939..Ive used only with ecm that needs bench and rom boot mode.


and thanks to my friend carlu78 that upload this ..dpa /same pinout of usb link.enjoy