CUMMINS ECM REPAIR TIPS

**makura** · 3rd June, 2010, 04:59 PM

Hi guys

i just wanted to open this thread to all ecm repair guys to share problems and ideas on these ecms,lets keep this open only for cummins ecm' problems and repair solutions.lets dig in and help each other out.

BATLER · 3rd June, 2010, 07:47 PM

nice thread m8,this will help us for sure!

**dafdiagnos** · 3rd June, 2010, 08:44 PM

the main problem seems to be when some bright spark decides to jump start these without turning lights on etc to remove power spike

**hercamp** · 4th June, 2010, 03:32 AM

three differents problems that I have are

in a celect plus ecm.....has not detect the oil presure semsor signal I recalibrated and nothin.?wh?
and other celect that shut down inyectors up to 80?c and the engine cant runn up to 1500 rpm...

and other celect ecm that ...runn the engine at idle in 950 rpm....?wh?

well ....now I solved problem changing the ecm but ....the real repair can be changing internal elements.

**Belefronte** · 4th June, 2010, 03:51 AM

Originally Posted by hercamp

three differents problems that I have are

in a celect plus ecm.....has not detect the oil presure semsor signal I recalibrated and nothin.?wh?
and other celect that shut down inyectors up to 80?c and the engine cant runn up to 1500 rpm...

and other celect ecm that ...runn the engine at idle in 950 rpm....?wh?

well ....now I solved problem changing the ecm but ....the real repair can be changing internal elements.

1.- maybe the signal is going to ground or the sensor screw up
2.- Make a cutcylinder test and check if the inyectors are ok or try to change a ecm and check if the RPM still under 1500
3.- Check the parameter of idle option.

**hercamp** · 4th June, 2010, 04:20 AM

Originally Posted by Belefronte

1.- maybe the signal is going to ground or the sensor screw up
2.- Make a cutcylinder test and check if the inyectors are ok or try to change a ecm and check if the RPM still under 1500
3.- Check the parameter of idle option.

I ve seen that .....I m not very explisit ( I do all test ) and finally I change ecm and solve problem...bythe way about this is the thread ....how to repair the ecm.

**makura** · 4th June, 2010, 07:40 AM

Hercamp try this trick,it works in most cases.

Start a calibration procedure and when your ecm is at lets say 33% upload,turn your key (ON or OFF)depending on which ecm you calibrating celect(off) celect plus (on) wait for the calib fail massage then start from scratch(on celect plus you will have to put your key on for 5seconds and off again thats how you will be able to communucate with the ecm,when you get to the part it say turn key off just click on ok since your key is already off)follow the screen promps to the end,now all the original info is lost,you trip info is back to 000 for everything,if you are using insite 7.4 you will get your parameter settings back,and if you using any thing b4 7.4 you have to do your parameters all over again.
with celect its pretty much straight forward,just put key on ,connect to ecm,rom boot message will pop up,just follow screen promps.
gooedluck,let me know if this works for you.

**madcash2** · 26th February, 2015, 09:54 AM

Hi Guys, need some help I had as similar occurrence where I followed the instructions to turn off the key whilst calibrating an N14 Celect Plus and the calibration failed. Now I cant connect to ecm via insite 7.6 nor calterm. I tried to connect to ecm in unlock mode on calterm and the ecm can not be detected so I tried on anther vehicle and the ecm can be be detected. So now stuck as calterm wont connect to ecm nor will insite. I read on one of the post someone talked about using insite boot? ive never used this feature please assist me if you have any idea how I can get connected to the ecm again.

thanks in advance

**hercamp** · 20th June, 2010, 04:36 AM

yeah ...its works ...fine ...in retreivering of parameters also ..I cant save one but the others two ecm works ok.thanks

**makura** · 20th June, 2010, 04:02 PM

Originally Posted by hercamp

yeah ...its works ...fine ...in retreivering of parameters also ..I cant save one but the others two ecm works ok.thanks

Hey you are welcome m8,thats what friends are for,i wish i had a friend to share calterm file with me...................

**hercamp** · 28th June, 2010, 02:54 AM

in the calterm thread is shared...about the ecm repairs..one common fail of celect plus ecm is the jake brake or engine brake actuator...how I ve seen ...the digital output and internal components...get some damage ...I think for engine brake electro valves...
solution of this is ...take the actuator signal and connect to relay..also the input signal its same ..with it we can be sure of ecm ....has the fuel control when active...and we can connect in two forms .
when we have one of two output signals damage ...whe take that and connect to master relay brake that we are trying to put.
other way when we have all outputsto engine brake signal damage ...in this case we can take negative signal from eng.brake botton and connect to relay..this one is alterntive to solve when we dont have ecm to replace.

I hope this help or suggest .help u and help to others to make a new alternatives ...its just how I have solved.

**ddtechguy** · 30th August, 2016, 06:19 PM

ive seen engine brake wire harness short out before the jake and cause issues with ambient air and crank sensor which takes out capacitator inside ecm. also a bad batery connection will cause issues too.

**electrobato** · 2nd July, 2010, 09:44 PM

dear guys woul you be so kind and help with a problem with a Cummins Celect Plus 3408303
I was being able to acces to the ECM, but it told me that the ECM needed to be recalibrated, so I selected autodetect calibration and suggested the right for the truck,

I follow all the steps to recalibrate, but at the end of all the operations the last 3 steps failed and the calibration did not transfer succesful.

I did all of this from the conection inside the driver cab,

after not workinf the calibration download process, I decided to to try with the connection from the engine, and looked like it was going to work , because some more new bars reload... making look good, and before I was able to turn the ignition key on...

again the transfer failed, the laptop disconnect from the ecm and now

I can not with ECM....
what can I do... the ECM is like not detected.. insite tell me to check connection but I know all cables are good...

thanks in advance for your help...
I will appreciate it a lot any help...

TAMBIEN hablo espanol.

Last Update:
Now the truck does not turn on, I'm in troubles, 'cause the first problem was too much smoke, but now, I have to make it turn on..
Any help is appreciate it a lot...

**makura** · 10th July, 2010, 06:56 PM

Originally Posted by electrobato

dear guys woul you be so kind and help with a problem with a Cummins Celect Plus 3408303
I was being able to acces to the ECM, but it told me that the ECM needed to be recalibrated, so I selected autodetect calibration and suggested the right for the truck,

I follow all the steps to recalibrate, but at the end of all the operations the last 3 steps failed and the calibration did not transfer succesful.

I did all of this from the conection inside the driver cab,

after not workinf the calibration download process, I decided to to try with the connection from the engine, and looked like it was going to work , because some more new bars reload... making look good, and before I was able to turn the ignition key on...

again the transfer failed, the laptop disconnect from the ecm and now

I can not with ECM....
what can I do... the ECM is like not detected.. insite tell me to check connection but I know all cables are good...

thanks in advance for your help...
I will appreciate it a lot any help...

TAMBIEN hablo espanol.

Last Update:
Now the truck does not turn on, I'm in troubles, 'cause the first problem was too much smoke, but now, I have to make it turn on..
Any help is appreciate it a lot...

Hi
This not a train smash,just turn your key on for 5 seconds,turn it off and and connect to the ecm with the key off and start a new calibration download.
Goodluck

**juanmnd** · 10th November, 2011, 02:02 AM

Originally Posted by electrobato

dear guys woul you be so kind and help with a problem with a Cummins Celect Plus 3408303
I was being able to acces to the ECM, but it told me that the ECM needed to be recalibrated, so I selected autodetect calibration and suggested the right for the truck,

I follow all the steps to recalibrate, but at the end of all the operations the last 3 steps failed and the calibration did not transfer succesful.

I did all of this from the conection inside the driver cab,

after not workinf the calibration download process, I decided to to try with the connection from the engine, and looked like it was going to work , because some more new bars reload... making look good, and before I was able to turn the ignition key on...

again the transfer failed, the laptop disconnect from the ecm and now

I can not with ECM....
what can I do... the ECM is like not detected.. insite tell me to check connection but I know all cables are good...

thanks in advance for your help...
I will appreciate it a lot any help...

TAMBIEN hablo espanol.

Last Update:
Now the truck does not turn on, I'm in troubles, 'cause the first problem was too much smoke, but now, I have to make it turn on..
Any help is appreciate it a lot...

For next time and always use the engine conector 2-pin or 6-pin on Celect Plus engines. This applies to recalibrate engines only. All other porpuses can be done conecting on the Cabin Conetor underneath dash somewhere downthere is located.

Because calibration will fail and sometimes ECM will go blank like it did in your case. Take care now!