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

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 12-05-2013, 09:01 AM
New Member
My Jeep: 2003 4.7L WJ
 
Join Date: Nov 2013
Location: From far away as Jupiter sulfur mines, way down by the methane sea.
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
beta14ok is on a distinguished road
Re: EVIC Problem

Cool. Very interested in the outcome.

I had my mechanic take a look and he believes that the EVIC unit is bad, quoted me several hundred $$ .......which I declined.

Mine doesn't light at all. But I lived through the same symptoms you have described. I'm thinking that I may pull the and replace with one off of ebay. or a pick-n-pull. They are relatively cheap. If it works I'll post-up.

Regards.
__________________

__________________
Reply With Quote
  #14  
Old 12-06-2013, 01:47 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: Jan 2011
Location: Fortville, Indiana
Posts: 108
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 1438
Me Fix is on a distinguished road
Re: EVIC Problem

G301 whcih appears to be the ground point for the wiring from the EVIC may be under the carpet inside under the drivers seat or there along side. I have not yet looked at that, but I did look inside the fuse box. Fuse 22 is a 40amp fuse and is solid. Fuse 8 does not exist. Nothing in that slot, not even any fuse connectors under the base cover. Not sure about that one. This is a 2004 Overland. It does have a sun roof which may have been an option and may in fcat get it's power and ground connection through the same wire set coming up to the EVIC. If thats true, the ground may be solid as the sunroof works fine ALL the time.

Was able to access the dioag by holding down the two buttons. I got a passed test almost immediately.

Not sure if I mentioned that the overhead reading lights do work even when the EVIC does not light up. I may need to remove the drivers seat to access the ground point for G301. I will do that next. Also I may try to take down the unit from the headliner just to see if anything looks loose there. Not sure how that comes off. I think there is a holding screw towards the front of the unit, then perhaps moving the whole module forward, it will come down enought to access the wire connectors.

I really don't think the unit is bad because it does function most of the time, but not when it's cold plus the fact it passed the diog test.
__________________

__________________
Reply With Quote
  #15  
Old 12-07-2013, 11:47 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,909
Thanks: 9
Thanked 92 Times in 87 Posts
Rep Power: 525861
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: EVIC Problem

I won't expect G301 to be the problem, since it is the ground for quite some other components, ie some of the power seat functions, left rear lock motor and window and adjustable pedals. This ground point is probably a stud where several wires connect togeter. The two components which share the exact same ground wire on this stud are the rain sensor and if installed, the intrusion transceiver module. So if the problem happens again, switch the wipers in intermittent and see if they work. Even with the rain sensing module inoperative the wipers will do one swipe and then wait for a wipe signal from the rain sensing module. So if its not raining, throw some water at the rain sensor area to test.
But since the problem is temperature related, i wonder if there is not a problem with the EVIC circuit board, maybe a loose solder or cracked board, which problem only appears due to the thermal properties of the board
__________________
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
  #16  
Old 12-11-2013, 11:50 AM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: Jan 2011
Location: Fortville, Indiana
Posts: 108
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 1438
Me Fix is on a distinguished road
Re: EVIC Problem

This problem does not keep me from driving and so when I get a chance, I will see if I can remove the EVIC module from the mount and have a look at the assembly. I know circuit boards very weel as i used to work for Delco Electronics in Kokomo Indiana. At one time they tried to use ceramic circuit boards in their radios. That ended up being a very bad idea per the thermo expansion issues you mentioned. Fiberglass boards can have simular problems or other issues with type solder used, flex issues, one sided or two sided boards, surface mounted or inserted components, etc. I will post again if I can figure it out. Thanks for all the suggestions with regards to the wiring assembly, attachment points and supplied power.
__________________
Reply With Quote
  #17  
Old 09-15-2014, 05:29 PM
Member
My Jeep: 2004 4.7 HO WJ
 
Join Date: Jan 2011
Location: Fortville, Indiana
Posts: 108
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 1438
Me Fix is on a distinguished road
Re: EVIC Problem

Back Again! Same issue with EVIC working when the interior of the Jeep is warm and totally dead when it's cold. I have been able to run self test when the EVIC is on and the self test passes.

I have tested the wiring, pin 3 is hot or 12 volts all the time. Pin 5 is hot when the key switch is on. I have even put a load or light bulb on each 12 volt wire when the unit will not come on and the 12 volt wires will power the light bulb which suggests there is enough power to run the EVIC any time. I never loose data as when it does come on milage is still there, distance driven is still active, tire pressure, everything. My Overland had the tire pressure sensors and the EVIC reads 4 tires, not the spare. I have the Home Link for the door opener and a sun roof. The overhead lights work all the time as does the sun roof. It's the readout and Home Link that does not function. I was thinking of buying a used unit from E Bay, but I would want to make sure the one i buy has all the functions I have. Does any of the numbers from the sticker suggest the functions. There are several numbers on the back of the circuit board housing. I have had the board out and looked at just about every component under a microscope. I could not see any circuit paths broken. Perhaps theer is a heat sensitive component that is open when cold and then works OK when warm or hot. I do not have an electrical sysmatic for the board. Frango gave me the pin outs for the circuit board connector and that was a big help checking the 12 volt wires. It was mentioned that there should be an F20 fuse in the fuse block, but I do not have that fuse, but the line that should have 12 volts is hot. I just don't know wheer it comes from. long winded, but still looking for help. I will buy a used unit if I can figure out the numbers. I don't want to buy the wrong one that might not have all the functions mine has.
__________________
Reply With Quote
  #18  
Old 09-15-2014, 08:53 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,909
Thanks: 9
Thanked 92 Times in 87 Posts
Rep Power: 525861
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: EVIC Problem

Maybe that this page on wjjeeps will help you: Jeep Grand Cherokee WJ - Overhead console and EVIC
__________________

__________________
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
The Following User Says Thank You to Frango100 For This Useful Post:
Reply

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
MPG fix mzerio Grand Cherokee - WK 11 04-28-2011 08:17 PM
Would a TSB fix this... 7upstang Trouble Shooting/Problems/Service 8 04-28-2011 08:18 AM
Fix-A-Dent vnbWK2 Grand Cherokee - WK2 - 13 04-06-2011 07:42 AM
Gotta fix this BLACK DOG Grand Cherokee - WK 28 10-11-2010 08:56 AM
Mirror fix Gomer Grand Cherokee - WK 1 08-23-2010 10:01 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:23 PM.


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