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Fob programming

Tiny
CHRIS MIZSERO
  • MEMBER
  • 2016 DODGE CARAVAN
  • 2WD
  • AUTOMATIC
  • 89,000 MILES
So, long story short. I've either buggered the system, or a short happened and caused it. Probably my fault.

Installed cm-dc3 remote start, working fine till September 10th. After sitting in heat for a few hours I am now dealing with possibly trying a hard reset of the entire van.

For programming fob, I have read that I just need to cycle on/off 5 times. I believe that's how I did it for the aftermarket fobs. Since Thursday, the system shows at 3 times cycle. Is this possible to happen without a fault?

Also, if I attempted to hard reset, (disconnecting battery and holding together for 5/10 minutes) how would I reprogram my only OEM fob?
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Sunday, September 13th, 2020 AT 3:30 AM

8 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More then likely it is not the key. You have what is called a passive entry module (PEM) and the Wireless ignition node (WIN) that have to recognize the key.

At this point I think we need to scan for codes because I suspect you will have a U1197 code which means the security system has shut down those operations.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If this is the case, you are going to need a scan tool capable of performing the attached relearning and programming features.

Read through this material and let me know what questions you have.
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Sunday, September 13th, 2020 AT 6:24 AM
Tiny
CHRIS MIZSERO
  • MEMBER
  • 12 POSTS
I have a lame Amazon one code reader, and also my stereo is connected via the maestro RR. If there is an error with the PEM/WIN, it will stop aftermarket fobs/remote start from working?

OEM fob still works perfectly fine. For everything else. But I will take a look with the code reader shortly. See if it is in fact this. Would there be a light on the dash though?
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Sunday, September 13th, 2020 AT 9:57 AM
Tiny
CHRIS MIZSERO
  • MEMBER
  • 12 POSTS
Confirmed that no code is showing up. But with this information, I do assume if I did a hard reset of TIPM, I would lose OEM fobik functionality?
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Sunday, September 13th, 2020 AT 11:23 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am not sure what you mean by a hard reset on the TIPM. The TIPM is programmed with your vehicle build configuration and it will not loose that programming unless it is programmed different.

The PEM/WIN information is the same thing.

Maybe I misunderstood. The OEM FOBIK buttons are all working? If so, what system is not working? The aftermarket remote start is not working?
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Sunday, September 13th, 2020 AT 7:55 PM
Tiny
CHRIS MIZSERO
  • MEMBER
  • 12 POSTS
I was tempted to disconnect the battery and holding the connections together to clear the system. As I've read it can possibly fix some problems. Just don't want to lose the programming of the OEM fobik if it does.

Understandable if it was misunderstood, running off less hours of sleep and caffeine than probably should be. As it is just the aftermarket remote start not working. Using the ch4 harness for plug and play install.

It was the on/off cycle 3 times bringing the screen up that has me confused, rather than the 5 times that I swear it was the first time.

But my plan is waiting for compustar to reply before attempting more work, just in case it is their module. Though, I have been looking at all avenues of possible causes to be safe.
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Sunday, September 13th, 2020 AT 8:23 PM
Tiny
KASEKENNY
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Okay. That helps. Then no, doing a battery disconnect and discharge (touching cables together) will no wipe your module memory. It will clear codes and erase PCM data memory. This means you will have to relearn all the adaptives and other info but that is not a big deal unless you have to pass an emissions test in the next week or so.

As for the aftermarket system, I assume compustar is the supplier of that system. If so, I think you are on the right path. Most likely there is an issue within that system and not with the vehicle in general. I doubt a battery discharge will do anything to effect that system so I wouldn't waste your time with it.

I think waiting on a response from them is wise. The fact that it was working then just stopped, points a module issue so I suspect they will send a replacement.

Keep me posted with what they say and we can go from there. Thanks for clarifying.
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Monday, September 14th, 2020 AT 6:12 PM
Tiny
CHRIS MIZSERO
  • MEMBER
  • 12 POSTS
Well, after confirming that it was possibly module, or wiring I had been referred to a shop by compustar, a bit more towards it. But apparently was wiring. This would have been understandable with how much I went and tried before it. (Went as far as to rewire the ch4 harness to make sure)

But all is working again. And I guess I will never know the full reason as they could have replaced it.

Thank you for the help and ideas! I was thinking it could have been van myself had you not brought up the error code.
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Tuesday, September 15th, 2020 AT 2:50 PM
Tiny
KASEKENNY
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You are very welcome and I am glad you got it straightened out and happy to be a small part in your success. Please come back next time you need some help. We are always here. Thanks
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Tuesday, September 15th, 2020 AT 7:17 PM

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