Question about 1999 Jeep Grand Cherokee

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1999 Jeep Cherokee grand..starts for a few seconds and shuts off

What would cause my jeep to run for a few seconds and shut off. Test show code 1686. do you know what this code means? Is it the Anti theft device? How do I override anti theft or sync back together so my jeep runs and I can use it? Thank you

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  • Jeep Master
  • 20,706 Answers

Dies it have IMMO???? the IMMOBILZER?
id the light glowing, saying IM UNHAPPY?
1st google hit, of 6000 says SKIM failure.
been swapping major electronics ?
i see you left out the full story.
i did X and not SKIM is unhappy// what is X?

the FSM covers this, read the FSM>
or goggle Jeep SKIM

Smart Key Immobilizer Module = SKIM

Posted on Jan 23, 2014

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Posted on Jan 02, 2017

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SOURCE: I need a wiring Schemattic (Diagram) for a 1996

I work mainly from memory and was a bit concerned that I was giving you the wrong color!

Glad it's OK now! Good luck

Posted on Jan 25, 2010

  • 819 Answers

SOURCE: how do i override/reset anti theft system?

this does not sound like an antitheft problem. the SKIS systems in the jeeps will allow the truck to start, but it will turn off again after 5 seconds.

FYI if your jeep key is gray, it has the SKIS system. if it is a black key, it does not.

have you already done diagnostics for a no start? if you are lacking fuel or spark, you need to look elsewhere for the problem if it does not start at all. good luck!

Posted on Jul 07, 2010

  • 688 Answers

SOURCE: 2000 jeep grand cherokee by pass anti theft chip

Your keyboard broke before you could type the question.

Posted on May 06, 2012

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1 Answer

Losses key to 1999 jeep grand Cherokee. So I replaced entire steering column but jeep still shuts off in 3 seconds. Any suggestions?


Jeep has a chip in the key sounds like your anti theft is kicking in. The car will only run for a few seconds then shut off. I think it would require reprogramming of your computer. Some times company's on eBay can do the programming for a fraction of the cost

Feb 04, 2015 | 1999 Jeep Grand Cherokee

1 Answer

What does the code 1686 mean for a jeep grand cherokee


you have dash lamps acting funny?
diesel engine? or gas, and what displacement? 4.0 , 4.7
P1686


did the immo lamp glow.
did you scan the PCM and see if 1685 (wrong key code)
1686, rigth out of fsm

Trouble Code: P1686 4.7L
No SKIM Bus Messages Received
Number of Trips to Set Code: 1
PCM details.
Trouble Code Conditions:
Engine started; and the PCM did not detect any MIC (I/P Cluster) messages over the Data Bus circuit for 20 seconds.
Possible Causes:
  • Data Bus circuit from MIC to the PCM is damaged or it is open
  • Instrument Cluster is damaged or has failed
  • PCM unable to communicate with the Instrument Cluster
  • PCM has failed
this means, the PCM can not talk to the I/P cluster puter.
comm fail.
even wilder guess is PCM talks to KEY via cluster so if cluster dead
so be key.
bad fuses ?

the FSm dont cover defeating any alrarms or IMMO less crooks read it. so...... google it.

Dec 29, 2013 | 1999 Jeep Grand Cherokee

2 Answers

1686 code came up on 99 jeep cherokee grand...what does this mean?


The p1686 code means :
No SKIM BUS Message received.
possible causes:
1. Invalid SKIM key.
2.wiring harness intermittent defect.
3.PCM DEF INTERNAL PCI BUS OPEN.
4.PCM PCI BUS CIRCUIT OPEN.
The first thing I would do is check the wiring harness unplug and check for loose pins then reconnect. Hope this helps.

Dec 29, 2013 | 1999 Jeep Grand Cherokee

1 Answer

I have a 1994 jeep grand cherokee and it always starts up, but sometimes it just shuts off randomly while I'm driving and after a few minutes of rest turns back on, the battery will still be worki


Install a new crank shaft sensor. I had the same problem with my wife's Jeep. It would run fine fore days at a time then quit. When the crank sensor goes out their is no spark or injection of fuel into the engine. This is a Hall Sensor. They can be intermittent, and affected bu heat. If your Jeep will not start, try freeing the sensor and see if it starts. Cold Freeze is used in electronics to test

Apr 17, 2013 | 1999 Jeep Grand Cherokee

1 Answer

My jeep grand Cherokee will shut off and all the gauge on dashboard turn on


It could be the O2 sensor and the camshaft sensor. I have the same Jeep and having the same issues. Auto Parts stores have the sensor, just need to find a good mechanic that wont over charge you. When you do, ask then to run the codes to make sure.

Mar 21, 2012 | 1999 Jeep Grand Cherokee

1 Answer

94 jeep grand cherokee shuts off while driving


That symptom can have many causes.
Most common are either a failing crank position sensor or fuel pump,
If you hear the pump running right after it stalls and you turn the key back on, chances are the problem is in the sensor.
There are tests listed in both chilton and haynes manuals but if testing is done while the vehicle is able to start and run the test may show nothing. Sometimes a fault will show on a code scan (larger parts stores do that free). As I said though, there are other items that can cause your problem...Hopefully it's one of the above though.

Oct 27, 2010 | 1994 Jeep Grand Cherokee

1 Answer

My jeep grand cherokee 96 v8 will start just for a few seconds and shut down and the headlights flash on and off after it die


I would call a dealer because usually when there's flashing lights involved it's a code. If it runs for a few seconds then dies it could be a plugged fuel pump or plugged line. The pump is able to pull enough fuel to let it run for a short time but then runs out. Hope it helps.

Sep 06, 2010 | 1996 Jeep Grand Cherokee

1 Answer

1999 JEEP GRAND CHEROKEE 4.7 V8


the crank sensor is in the lower passenger side of the block....a cam sensor can also cause this...it would be wise to have someone pull the codes from the pcm...it could save you a lot of money and headache....most parts stores do it for free

Nov 10, 2008 | 1999 Jeep Cherokee

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