Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 05-27-2014, 05:51 PM
New Member
 
Join Date: May 2014
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
lorettagrogan is on a distinguished road
99 Jeep Grand Cherokee

I have a 99 jeep grand cherokee and was driving down the road with the AC and radio on. The vehicle turns off while driving. All functions go away, check engine light turns on and no power stearing. So i stopped the vehicle, turn off radio and AC, on side of road. Turned of the ignition. Then restarted vehicle. My Jeep started up right away.

A week later (hot outside) have AC and radio going and vehicle turns off on road. I stopped the vehicle ,turn off radio and ac, and tried restarting it, wouldn't start, (check engine light is on and gages are off, no power stearing). I tried restarting again, and it fired up. This time it took two times to get the vehicle to start up.

Anyone have any suggestions?

Thank You

Lora
__________________

__________________
Reply With Quote
  #2  
Old 05-29-2014, 08:08 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,925
Thanks: 9
Thanked 93 Times in 88 Posts
Rep Power: 525880
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 99 Jeep Grand Cherokee

Welcome to the garage.
That you loose all indicators looks that you have a PCI data bus problem. The PCM sends data via this bus to the instrument panel. A problem in the PCM or any of the connected components can bring the bus down and the engine will stop. Sometimes water ingress in a large connector on the passenger side can bring the bus down as well. Not so easy to solve this one. To be sure that the bus has a problem, you could measure the voltage on pin 2 of the data connector under the steering wheel. Normal voltage is around 2.5 V. If its 0V, then or the bus wire is shorted to ground, or the PCM is not supplying the bus voltage. If its around 7.5V, then one of the connected components has a problem and causes the bus voltage to go too high.
There is a shorting plug under the steering wheel area where all the bus wires are connected. Removing the shorting plug will disconnect most of the components from the PCM, except the SKIM, which is necessary to be able to start the engine.
For the power steering to work, you need a running engine.
Also check for fault codes set using the key dance: ignition switch off/run three times and leave in run at the third time. Odometer will show Done when no faults stored, or a fault code(s). Let us know what it gives.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
Reply

Tags
grand cherokee, jeep

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Jeep Grand Cherokee lardeo :: 2006 Jeep Grand Cherokee sandbox Member Garage Discussions 0 10-10-2012 08:31 PM
Jeep Grand Cherokee 4.7 HO Overland :: 2002 Jeep Grand Cherokee WJ Overland Member Garage Discussions 0 10-01-2012 10:43 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:32 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community