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Jeep Grand Cherokee Limited Smartkey Problems?

Hello all,

I'm driving a 2004 Grand Cherokee Limited with approx. 95,000 miles. About two days ago I was out in the mountains and got back to my car from a hike and she would start, run for about two seconds and then stall out from what seemed to be a lack of fuel. All of my gauges were flat dead. After about two hours of messing around, I managed to get it started by spraying down the connections to the alternator with some contact cleaner. I don't know why this worked. The car ran normally to get me home.

The next day, I had to go back to that same spot to look for something I had lost (all normal getting there), and when I got back in the car and started it; it did the same thing once, then started and ran. All was fine for about five miles, and then my gauges started going haywire. They would work normally and then drop off randomly, and not in unison. Various random warning lights were going on and off. Also, my drivers side window and door locks stopped functioning at this point, but would work when the gauges were working. There were a few other bugs, such as the cruise control and steering wheel mounted stereo controls not working. I immediately went home and parked it. Upon trying to start it again, it did the same thing...started strong, ran for about two seconds, then died from what seems to be a lack of fuel.

I borrowed a code reader and got two codes which read as follows:

P1696 - No CCD/J1850 Message From TCM. "No CCD/J1850 messages received from the electronic transmission control module (EATX) or the Asian transmission controller)"

P1686 - No SKIM BUS Messages Received. "No CCD/J1850 messages received from the Smart Key Immobilizer Module (SKIM)"

The smart key system seems to be the issue. My understanding is that the anti-theft system is operated by shutting off the fuel pumps, so this makes sense. Additionally I get the icon of a key with a line through it for on the dash when trying to start the car.

What confuses me is the other issues showing up, the gauges dancing and various, seemingly unrelated electrical bugs. Could this be a result of issues with the ground strap? Could a loose ground strap be the root of all of the issues? If so, where could I find information on repairing it? My Haynes service manual is completely devoid of information on this.

Thank you for your time and input.

Comments

  • 5213252132 Posts: 62
    It might be the battery, Jeeps are very sensitive to battery voltage. Also,the alternator produces unsteady volts, and the battery smooths the unsteady volts out. So if you have a bad connection with the battery posts, then you can see the problem. The Smart Key Imobalizer works by electronically cutting out both the fuel pump and ceasing spark plug firing. I also tried starting the engine with a spare key that does not have the Smart Key chip, the engine started and the SKIS indicator lamp (the orange light with the key and the line going through it) came on. After a few seconds, the engine stalled. It could be the ground strap, but I dought it. It could also be the dreaded computer failure. Hope this helps. ;)
  • tuggajbtuggajb Posts: 646
    battery or battery cables need cleaning
  • eltipoeltipo Posts: 21
    I had the same pblem with my '06 Laredo. It is the ignition switch. It is not recognizing your key correctly. The car basically thinks it is being stolen and shuts down. The dealer changed my ignition switch in Nov. of '06 and I have not had the same problem since.

    Fortunately for myself the Jeep was still under warranty. I can't imagine this is cheap.
  • 5213252132 Posts: 62
    It might be the ignition switch, but the Jeep is still driveable. If it was the ignition switch, it would just shut down after a few seconds after starting the engine.
  • I have a 2001 JGC and one day I went to start the Jeep and all the dash board icons were lit up along with all my gauges being dead. I hit the fuse box and it all came back on but for a limited time. If the iginition key is turned to ACC, all the gauges work. It is when the Jeep is started lights will light up and gauges go dead. I took the Jeep to the Local Auto Zone to be tested and it reported the SKIM MODULE needed replaced. I ordered the SKIM MODULE thru Jeep and replaced it myself. The lights are still lit up and gauges dead but an additional problem as popped up----the Jeep will start but will die after a few seconds. Does the KEY have to be reprogrammed to match the NEW SKIM module or could the problem be something else?

    Any help would be greatly assisted. Thanks.. :confuse:
  • as for the key it needs to be re programed(all of your keys) with the DRB scann tool. also if it does read the key the key light should flash. found that in my owers manuel. if the key light comes on and stays on the skim is not connceting to the pcm. i have been worken on my wifes 2000 jeep with the same problems and found the c1 connector at the pcm was loose. if i wiggle it everything works. does anyone know if jeep sells the conncetor? it does not lock on right..
  • Did you have any luck with this? I'm having the same problems. And it is driving me crazy!
  • Disconnect the negative pole from the Battery for about 5 minutes and also the Fuse that says: "PCM Battery" (fuse box near the battery), and put everything again after 5 minutes. Then with the key in the OFF position, press the C/T and Reset buttons on the Overhead Console (EVIC), Turn the Ignition Switch to the ON Position (not Start the Engine), and release both buttons, and then a message will appear on the Overhead Console Screen, and tell you if the Test has been passed or not.

    It helped me with the same problem, and solved it today.

    Hope this works for you too.
  • Hey,

    Is there any way to bypass the SKIM system. Seems to me that this system is just a rip off to make Jeep owners spend large sums of money for keys, programming and additional services that would not be required otherwise.

    Some bean counter must have thhought this one up to squeeze more money out of the consumer.

    Regards,

    Mike
  • crullcrull Posts: 1
    Mike,

    Having a serious SKIM issue also. Wife won't drive the JGC as seh feels it will not start when needed. Have you found a "bypass" to the SKIM?

    Thanks,
    Dana
  • I have taken my car to the dealership twice for this and the problem went undiagnosed I was told I just needed a new key. Until i took it to another dealer ship which told me what it was the SKIM Module breaking down 3 times in the course of a year over the same thing is a problem and Daimler Crysler will hear about this, they have already reimbursed me once.
  • alby3alby3 Posts: 46
    well i had the security key light come on and stay on (not flashing). sometimes it went out but it was on more than off. but my 2000 grand cherokee ran fine. however, it died on me 2 or 3 times over a week and 1/2. but always started right back up after i came to a stop and put in park and restarted.
    then a week or two into it the guages all went dead, and all the dash lights came on. but the wj was still running fine. the guages would bounce on and off but usually stay on. then i realized it was happening when the temperature went below say 45 degrees. it happend alot then, but she still ran fine... the key light was coming on almost everytime but the guages seem to only bounce around when the outside temperature was under 45 degrees or so....
    got to be a ground.... right??? well i undid the battery terminals and cleaned them even thought they looked good and left the battery unplugged for 20 minutes. i read this may reset the computer. did not expect much. but that was two days ago and i have not had a problem since. and the temperature was in the 30's. i am still skeptical but it is working great since i cleaned the terminals and left it unplugged to rest the computer.
    so we will see
    alan
  • done as you said,,my key light was on ,,no security would work,,and transmission would not shift out of low gear,,after following your instructions ,,it cleared it self ,,and now all is fine,,,THANK YOU
  • niblick45niblick45 Posts: 12
    I have a similar problem with a 2011 JGC. The hands free function on one key was intermittent, I took it in and they gave me a new key where the hands free didn't work at all. Now the dealer says they need to replace the WIN module. I am 100% convinced these guys are clueless. It sopunds like they are just Easter egging the problem changing parts until something works.

    4 service trips to fix a friggen' key? My first and last Jeep.
  • I have a 2001 jeep grand cherokee. I am currently having problems getting it started. It will start for 3-5 seconds and stall out. I checked the fuel rail and Im getting plenty amounts of gas. However on rare occasion it starts up, my gauges and sometimes windows and door locks dont work. Although my dash lights do. I checked for a faulty instrument cluster and a bad ground... not the problem. Oh and the security light is on! Any insight please? Thanks
  • I have the same Jeep and same problem! Please post how you resolved this and I will do the same. I am re-trying reset power now. Code reader says I have "no sentry key" and immobilizer Module" message. I have three keys and two worked. The third would unlock but only start for a few seconds. I have previously replaced lock mechanism and ignition switch. Both keys worke since June but it now sits in driveway. I hate having to tow it to dealer if I can resolve where it sits.
  • I just went out to my wonderful reliable jeep and disconected the battery, (again) and removed the coolant resevoir tank, removed the 3 connectors to the PCM and the two above attached to the firewall. I sprayed all pins with electronic contact cleaner, and blew out everything with compressed air. Re-attached everything and turned key on I realized I had gauge readings. So I tried starting and it started right up. I don't know if it was the connector cleaning/reseat or battery disconnect. I did re-set battery last week with no help. I am probably going to send next update from side of the road somewhere.....wish me luck.
  • how did everything work out for you? the garage is running full diagnostics on it, but i too believe its something to do with the pcm.
  • I had the same issues with my 2001 Jeep Grand Cherokee about 2 months ago. In the end it was the PCM.
    Problem started with gauges not working. Then starting/stalling issue. No a/c, windows occasionally would not work. After researching a lot of forums and blogs I tried several things. Cleaned battery terminals. Tested several modules for a short (window, MIC etc..). I had 2 problem codes, P1686 (no SKIM bus) and P1687 (no MIC bus).
    The PCM is expensive. I was quoted $700.00 for a new one, not counting labor. The PCM has to be programmed to your vehicle but, this doesn't have to be done by the dealer like they want you to think. I found a company out of FL that sells refurbished and programmed PCM's. Allcomputerresorces.com. My jeep has been running fine since I replaced it a month ago. It was very easy to replace.
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