Question about 1999 Jeep Grand Cherokee
Jeep starts and runs for a few seconds then shuts off. ran test and code 1686 came up. is there a way I can bypass the anti theft relay to start it? Or how do I get them in sync again?
Both keys fail, car came with 2,
never keep less than 2 or get stranded......
can be many things, cause but key tops list , and is the most easy to fix. get a reprogrammed key from dealer.
if you had 2, you can make a 3rd. DIY (rules are in operators guide, if you care to read them)
Posted on May 17, 2015
The p1686 code means :
No SKIM BUS Message received.
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.
Posted on Dec 29, 2013
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Posted on Jan 02, 2017
Alarm Module Reset Procedure
NOTE: This information applies to a Vehicle Theft Security System (VTSS) that was armed when the battery was disconnected and reconnected.
When the armed VTSS senses that the battery has been disconnected and reconnected, it enters its power-up mode. In the power-up mode the alarm system remains armed following a battery failure or disconnect. If the VTSS was armed prior to a battery disconnect or failure, the system will have to be actively or passively disarmed following a battery reconnection.
The power-up mode will also apply if the battery goes dead while the system is armed and battery jump-starting is attempted. The engine no-run feature will prevent the engine from starting until the alarm system has been actively or passively disarmed.
Passive disarming of the Vehicle Theft Security System (VTSS) occurs when the vehicle is unlocked using the key to unlock either front door or the lift gate. Active disarming of the VTSS occurs when the vehicle is unlocked by depressing the Unlock button of the Remote Keyless Entry (RKE) transmitter.
Once the alarm has been activated (horn sounding, lights flashing, and the engine no-run feature), either disarming method will deactivate the alarm.
Depressing the Panic button (if equipped) on the RKE transmitter will also disarm the VTSS, but the horn will sound and the lights will flash for about three minutes as part of the Panic feature. The horn and lights can be stopped by pressing any of the RKE transmitter's buttons or driving the vehicle above 15 mph.
Posted on Jan 28, 2009
they have crankshaft sencers on the transmission on jeeps. it would be up high on the drivers side on front of transmission. they will cause it to not get fuel or fire and can run then quit.
Posted on Sep 21, 2012
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
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