Demons in my '08 - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 13 (permalink) Old 04-24-2018, 05:58 PM Thread Starter
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Join Date: Jul 2013
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Model year: 2008
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If 4WD - system: QT-I
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Question Demons in my '08

Hi all,
I originally posted this in the new member section.


My wife has a '08 Commander Limited 4X4 & this truck has had several really weird issues in the past couple of months. The last one was when she went to leave for work the other day, it wouldn't start. The only thing that was lit up on the dash was the odometer & the 'door open' diagram. No ding ding, nuthin. No other lights lit up on the dash. Also, no radio, no power windows, no electric mirror control. BUT the seat still worked & the interior & headlights worked. So I got into this thing later that morning and checked every fuse possible - all 3 banks of fuses all OK. Wiggled all the relays, connectors, everything I could get my mitts on - same. So for S & G's today I went out to try it again and BINGO - everything works and it started right up. NO check engine light, no codes at all. This is driving me nuts. Has anyone encountered this problem and if so, what was the ultimate fix?

thanks in advance.
Jon
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post #2 of 13 (permalink) Old 04-24-2018, 06:13 PM
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Join Date: Oct 2017
Location: Evanston, IL
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Model year: 2010
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Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 100k
Posts: 298
Quote:
Originally Posted by wb8yjf View Post
Hi all,
I originally posted this in the new member section.


My wife has a '08 Commander Limited 4X4 & this truck has had several really weird issues in the past couple of months. The last one was when she went to leave for work the other day, it wouldn't start. The only thing that was lit up on the dash was the odometer & the 'door open' diagram. No ding ding, nuthin. No other lights lit up on the dash. Also, no radio, no power windows, no electric mirror control. BUT the seat still worked & the interior & headlights worked. So I got into this thing later that morning and checked every fuse possible - all 3 banks of fuses all OK. Wiggled all the relays, connectors, everything I could get my mitts on - same. So for S & G's today I went out to try it again and BINGO - everything works and it started right up. NO check engine light, no codes at all. This is driving me nuts. Has anyone encountered this problem and if so, what was the ultimate fix?

thanks in advance.
Jon
Mine had the same problem and it was traced to static build up causing a glitch in the ECM. The fix was replacing the ECM after many tows and even making new keys.
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post #3 of 13 (permalink) Old 04-24-2018, 07:34 PM
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Join Date: Oct 2015
Location: East Coast of Florida
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 101,200
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Quote:
Originally Posted by wb8yjf View Post
Hi all,
I originally posted this in the new member section.

My wife has a '08 Commander Limited 4X4 & this truck has had several really weird issues in the past couple of months. The last one was when she went to leave for work the other day, it wouldn't start. The only thing that was lit up on the dash was the odometer & the 'door open' diagram. No ding ding, nuthin. No other lights lit up on the dash. Also, no radio, no power windows, no electric mirror control. BUT the seat still worked & the interior & headlights worked. So I got into this thing later that morning and checked every fuse possible - all 3 banks of fuses all OK. Wiggled all the relays, connectors, everything I could get my mitts on - same. So for S & G's today I went out to try it again and BINGO - everything works and it started right up. NO check engine light, no codes at all. This is driving me nuts. Has anyone encountered this problem and if so, what was the ultimate fix?

thanks in advance.
Jon
Quote:
Originally Posted by Legofan
Mine had the same problem and it was traced to static build up causing a glitch in the ECM. The fix was replacing the ECM after many tows and even making new keys.
Jon, I deleted your thread in the new member section, please refrain from posting the same thread in more than one sub-forum, once is plenty, someone will eventually answer you.

I think @Legofan gave you the answer to your problem.

That aside, welcome to the forum @wb8yjf.


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post #4 of 13 (permalink) Old 04-25-2018, 11:20 AM Thread Starter
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Join Date: Jul 2013
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Model year: 2008
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Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 125000
Posts: 7
Thanks for the info! I'm looking into that today. My wife took the truck to work today, hopefully I won;t be getting a call later (fingers crossed).
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post #5 of 13 (permalink) Old 04-29-2018, 03:04 PM
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Join Date: Jan 2016
Location: Port Orchard, Washington
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Model year: 2008
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Honestly, it seems the commander has the potential to have some crazy hardcore electrical Gremlins that happen only once or twice ever, then they never happen again in MOST cases. I had all internal accessory electrical go out while driving one time. No seat control, AC or blower, lights or turn signals, etc. Turned it off and back on. Never happened again. This was 3 years ago.
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post #6 of 13 (permalink) Old 05-03-2018, 06:03 PM Thread Starter
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Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 125000
Posts: 7
I ordered a rebuilt ecm - should be here tomorrow. $199 - free shipping. I hope this thing fixes the weirdness the Commander has been having at random times. A few months ago it would start, but every idiot light was lit up on the dash & I had to use a small screwdriver in the slot by the shifter to get it into gear. It spit out 11 or 12 codes, all of which made no sense. A day or so later after clearing the codes (some of them came back right away), the lights went off and the computer didn't throw any more codes. I own my own business and service electronics, but I have no way to check the ecm out unless it was an obvious fail, and even then no way to flash the thing.

I'll let everyone know how this goes.

Again, thanks for all the replies.
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post #7 of 13 (permalink) Old 05-06-2018, 12:53 PM Thread Starter
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Join Date: Jul 2013
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Own a Commander?: Yes
Model year: 2008
Trim Package: Limited
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 125000
Posts: 7
I replaced the ECM on Friday and the truck seems to be doing fine. I guess time will tell, but I'm pretty convinced the ECM was causing my 'demon's at any time it wanted to.
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post #8 of 13 (permalink) Old 05-06-2018, 01:11 PM
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Join Date: Oct 2017
Location: Evanston, IL
Own a Commander?: Yes
Model year: 2010
Trim Package: Sport
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 100k
Posts: 298
Quote:
Originally Posted by wb8yjf View Post
I replaced the ECM on Friday and the truck seems to be doing fine. I guess time will tell, but I'm pretty convinced the ECM was causing my 'demon's at any time it wanted to.
Good news, keep us posted.

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post #9 of 13 (permalink) Old 05-06-2018, 04:27 PM
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Join Date: Oct 2015
Location: East Coast of Florida
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 101,200
Posts: 5,320
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Quote:
Originally Posted by wb8yjf View Post
I replaced the ECM on Friday and the truck seems to be doing fine. I guess time will tell, but I'm pretty convinced the ECM was causing my 'demon's at any time it wanted to.
That's good news.

Do you happen to have a link to where you ordered your ECM from - in case anybody else needs one?


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post #10 of 13 (permalink) Old 05-24-2018, 04:48 PM Thread Starter
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Join Date: Jul 2013
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Model year: 2008
Trim Package: Limited
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 125000
Posts: 7
It's been a few weeks and so far everything is working great! Thanks for all the help!

Here's the link for where I got the PCM:

https://www.solopcms.com/auto-comput...ngine-computer

I ordered it on Monday and it was here by Friday and they sent a UPS call tag for the exchange (included in the price).
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