LMM - another No remote start after ECM swap

[Cougar281]

A freind of mine just got an ECM from ECUOutlet for his 07 LMM, and had it programmed with his OS (12628594) from his VIN. Now the remote start doesn't work. Initially, I suspect it was becuase the injector flow rates hadn't been programmed. I programmed the flow rates from the GPCM to the ECM (Twice, actually). It then wouldn't work, probably because the DPF was removed, but not tuned out at that point. Now he has a Quadzilla with the DPF delete program in it, and the remote start STILL doesn't work. I noticed that there where some DPF related codes that where coming and going. They never matured, and didn't set a MIL, they showed up in the V2, but not in the 7.5 scan tool. Below are the DTC's as they where recorded with the "Record all diags" function. Any suggestions? I may end up using a license and hooking him up with a EFILive DPF Delete tune. Might work better.... Also, the "Remote vehicle start disable 1" data is "Unknown", and there are no more entries...just in 1.

P2033=ECM,-F---N-S
P0420=ECM,-F---N-S
P2455=ECM,-F---N-S
P0546=ECM,-F---N-S

[ECUoutlet.com]

Just to lend a hand here, there are other options that may need to be programmed/relearned. We ship the new ECM loaded with the newest/latest base factory calibration but obviously no option/flow/ect data as we dont have the vehicle.

From the service manual:
If the engine control module (ECM) is replaced, the following procedures must be performed:

Capture the Option data.
Important: Clear any DTCs that may have set after completing the programming procedure.

Enable ECM Reprogramming--Refer to Service Programming System (SPS).
Restore the Option data in the new ECM.
Start and idle vehicle.
Using the scan tool, perform the Turbocharger Learn Procedure. Refer to Turbocharger Learn.
Perform a Diesel Particulate Filter (DPF) Regeneration Enable.
If necessary, perform the following:
• Theft Deterrent--Refer to Theft Deterrent Control Module Programming and Setup.

• The Fuel Injector Flow Rate Programming--Refer to Fuel Injector Flow Rate Programming.

• Engine Oil Life Remaining--Use scan tool to reset Engine Oil Life.

• Fuel Filter Life--Use scan tool to reset Fuel Filter Life.

[MMLMM]

Does the truck crank for a second and shut back down, or just nothing at all?

If it cranks and shuts back down, it is the DTCs causing this. If there is no DPF on the truck and the ECM does not have the codes blocked to not report, It simply wont work.

I assume the the hood is closed? But that will cause remote start to not function as well.

That ****94 OS is a PITA, seems everyone is having problems with it.


Sounds like you ordered a factory ECM, that would mean these codes are not blocked. The remote start would act the same if you were to pull the DPF a factory truck.

[Cougar281]

It starts and runs fine with the key, but with remote start, nothing at all. Thanks for the heads up ECUOutlet; I'll look at the other steps. I wonder if full flashing the read I took off the original ECM would help?

[usafracer]

I had the same problem. I am sure that you have read about it in the other thread. It turned out to be something with the ECM its self. Mine was not new though it was used.

[ECUoutlet.com]

I had the same problem. I am sure that you have read about it in the other thread. It turned out to be something with the ECM its self. Mine was not new though it was used.

If you need another ECM please let us know, we sell new units typically below what used ones go for with free OEM programming :)

[GMPX]

I am leaning towards it being a VATS issue. I know that sounds odd when the key is used to start the truck it works, but the remote starts relies on the fact the ECM and Theft module have been linked by GM's SPS.

You should also be able to link the VATS with EFILive.
If you look at parameter G0302 it describes what needs to be done to relink the ECM, though I suspect the relink may have already worked if the vehicle is running.
One thing to check as these are new ECM's, in the Tune tool, go to the locking option and look at the VATS counter (see pic). It probably needs to be at 0 for the VATS to link up fully.
Main thing is not to panic and give up on getting this working, it will be something trivial in the end, it's just a matter of figuring out what the ECM is unhappy with.

Cougar281, are you able to please send me a log with the remote start disable PID logged. I may have got the bit flags wrong which is why it is not showing anything.

Cheers,
Ross

[MMLMM]

And your positive the flow rates were copied correctly?

theres a thread you could read through.
http://208.109.104.11/forum/showthread.php?t=8662&highlight=relearn

[usafracer]

Ross,

One thing I noticed with the pid's you sent me when I was having the same problem is they would only read if the truck would crank over.

[GMPX]

Well, even if you start the truck with the key and it runs, if there was an attempt to remote start it and it failed the ECM will still report the reasons why. At least that is what those PID's are supposed to do.

Cheers,
Ross

[fire0021]

Any thing ever get figured out with this. I have the same exact issue I am useing the 8594 os wellactually the 52528594 os and the truck wont remote start it will fire my lift pump and the securitey light on the dash comes on but thats it. wont even atttemp to start. Works and runs fine useing the key. And with my other ecm and 7103 os my remote start works fine. :help2:

[IdahoRob]

Make sure there are no codes.

[fire0021]

Make sure there are no codes.

LOL yea I know that one :) YEa there no codes hidden or visible any other ideas ? usally if theres a code present it will atempt to star then shut off. but in this case it wont even try to start just does what i stated above. its perplexing to say the least.

[Cougar281]

Oh, I guess I didn't post it here :doh2:... Sorry!!

Open up the Tune tool, go to "Flash" > "PCM Security" Click "Check Status". Look at the line that says "GM VAT/IGN cycles:". If that number is anything other than "0", click on the "VAT Relink" tab, next to "IGN Cycles", enter "0" and click the "IGN Cycles" button. Power Down, start up again, and check status again. If it reads "0", your remote start should work.

My guess is your counter got reset, and is decrementing from 254 (Each ignition cycle decrements it by one). Given enough time, it would eventually get to "0" on it's own and RS would "magically" work.

[fire0021]

Oh, I guess I didn't post it here :doh2:... Sorry!!

Open up the Tune tool, go to "Flash" > "PCM Security" Click "Check Status". Look at the line that says "GM VAT/IGN cycles:". If that number is anything other than "0", click on the "VAT Relink" tab, next to "IGN Cycles", enter "0" and click the "IGN Cycles" button. Power Down, start up again, and check status again. If it reads "0", your remote start should work.

My guess is your counter got reset, and is decrementing from 254 (Each ignition cycle decrements it by one). Given enough time, it would eventually get to "0" on it's own and RS would "magically" work.

Presto YOU da man thanks Worked like a charm. This should be a sticky :)

[Spuco]

Oh, I guess I didn't post it here :doh2:... Sorry!!

Open up the Tune tool, go to "Flash" > "PCM Security" Click "Check Status". Look at the line that says "GM VAT/IGN cycles:". If that number is anything other than "0", click on the "VAT Relink" tab, next to "IGN Cycles", enter "0" and click the "IGN Cycles" button. Power Down, start up again, and check status again. If it reads "0", your remote start should work.

My guess is your counter got reset, and is decrementing from 254 (Each ignition cycle decrements it by one). Given enough time, it would eventually get to "0" on it's own and RS would "magically" work.

Would this also work with an after marked remote? Did a full update OS w/ DSP5 reflash and the remote start wont work.

[Cougar281]

Would this also work with an after marked remote? Did a full update OS w/ DSP5 reflash and the remote start wont work.

Don't know about the aftermarket remote, but if it doesn't work after a reflash, check the Ign cycle counter as I said; It's possible it got reset with the flash.

[Spuco]

Don't know about the aftermarket remote, but if it doesn't work after a reflash, check the Ign cycle counter as I said; It's possible it got reset with the flash.

Thank You
Going to check it out in the morning.

[Spuco]

Factory remote works however, aftermarket market will no longer work in the truck do to DSP5 OS. Spent an hr 1/2 there with them trying to reflash the remote start. Does not work do to the flash comes from a site that is based off of yr and model. He said the only way to get it back working is to go through everthing one thing at a time. I chose not to do it. Would of cost more than the remote start itself. I going to have to live with the factory remote

[GMPX]

I can't see how having the DSP5 OS would stop it, did they give a reason for this?

[Cougar281]

And why would you want to mess with an aftermarket remote start when it has it from the factory?:confused: Factory seems to work just fine...

[Spuco]

I can't see how having the DSP5 OS would stop it, did they give a reason for this?

Basically, what they said is, being that the operating system was changed the one that they are flashing the remote with is based off of a stock OS which is provided to them via internet download. So what ever is going on inside the unit it will not reconize the DSP5 OS. There is a way they can due it. Its up to me if i want to go for the exspense. They say it would take a few hr at a 85.00 per hr rate. That adds up to more than I paid for the remote start to begin with. Or they can be just to lazy to figure it out, either way I rather put the money towards my tranny build, LOL

[Spuco]

And why would you want to mess with an aftermarket remote start when it has it from the factory?:confused: Factory seems to work just fine...

Well, i guess you are right. However i didn't like the fact that is only ran for 10min and additional 10 if you cought it in time to reset, and second it never turned the heat on as it was supposed too. Every time i got in the truck, the heat would be off. Went through the owner manual and read that truck w/ auto controlls would turn on automaticaly, however never did. The after market was part of an alarm as well did not cost much more so i through in the remote with the alarm. Now nothing works, when i first went in the alarm worked, when they reflashed it to try to get the remote start to work everthing shut down, So needless to say i no longer have the alarm either.