Question about 2005 Jeep Grand Cherokee

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My service 4 wheel drive system appear all the time on the computer

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I had this same issue, turned out to be the rear diff wiring harness had corroded and shorted. Get the mechanic to check this and the rear diff soleniod

Posted on Jan 13, 2010

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Posted on Jan 02, 2017

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SOURCE: Service 4 wheel drive, service electronic brake warning

This is caused by by a bad ignition switch. According to the dealer the ignition switch contains an antenna that many of the sensors use to communicate with the vehicle, as well as the key fob. When the switch starts going bad the vehicle computer losses communication with these sensors and starts producing codes which include the 4wd and the electronic brakes. My fiance has had the same issues with her Grand Cherokee as well as the key fob not working, the remote start not working, the service engine light comes on, the door chime will sound when the key is NOT in the ignition and the lights are NOT on, as well as numerous codes usually relating to loss of communication with one system or another. All of which are fixed once the ignition switch is replaced. Unfortunately, this usually only fixes the problem for a short time (weeks or maybe a few months) before the piece of junk ignition switch fails again and it all starts over.

Posted on Mar 10, 2009

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SOURCE: The 'service 4 wheel drive system' light has come

disconnect the battery for 2 minutes and reconnect it.

Posted on Jul 13, 2009

ZJLimited
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SOURCE: computer light says service 4 wheel drive switch

According to the mechanic who works on my 94 Jeep it's one of three things:
1) Corrosion on the connector to the switch (which is located on top of the transfer case).
2) A bad switch. Part cost about $22.00 or,
3) A bad console display. he says they have had a fair number of console display units fail.

Posted on Jul 15, 2009

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SOURCE: service 4 wheel drive system light on and cannot

There is a software updated for this concern if there are no driveabilty problem the dealer needs to undate the 4wd software.

Posted on Oct 21, 2009

  • 1 Answer

SOURCE: I have a 2003 Yukon

My 2003 yukon xl does the exact same thing. Sorry that I do not have a solution, but I figure its the same reason the daytime running lights always burn-out. The SUV in general has be an absolute POS and I will never buy another.

Posted on Nov 11, 2009

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Related Questions:

1 Answer

4WD system on jeep will not work when the temp drops below freezing


there maybe some dirst in the sensor - try cleaning it

Nov 20, 2014 | 2009 Jeep Liberty

1 Answer

Why does my 4 wheel drive not work all the time?


Elaine,

not work, do tell what makes you think it dont work (a lamp) or tires slipping or dead tires. (by tires mean that and traction)??????????

what mode fails, of the many, and where.???????



first off, we dont know what your tires are touching.

on road, or off road. pavement or ICE or snow.

that matters big time . (you read manual and match MODE to Road)

your lost operators guide explains all that, right?

eg: how and when to use, 4wd, its all there. I promise.

ControlTrac 4-wheel-drive system



here are the mode. which one , gives you problems.



quote ford with comments.



What are the modes, and how do they differ?

(note this is the operational behavior of a 2008 Ford Expedition. Newer and older Expeditions will vary only slightly)



2H 2-wheel-drive with high range gearing (1.00:1) Rear-wheel-drive capability,

2-wheel electronic traction control system is enabled



4A 4-wheel-drive Auto with high range gearing (1.00:1) Full-time all-wheel-drive capability, ((best on pavement or any time)

Electronically adjusted torque split to front & rear wheels, Electronically variable center differential,

Front driveshaft & rear primary driveshaft allowed rotational speed difference,

4-wheel electronic traction control system is enabled



4H 4-wheel-drive with high range gearing (1.00:1) Part-time 4-wheel-drive capability, (not for dry pavement EVER)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled



4L 4-wheel-drive with low range gearing (2.64:1) Part-time 4-wheel-drive capability, (off road usage, mostly)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled, ESC and RSC are disabled



In 4A mode the center differential is electronically-controlled and rear drive wheel bias. The on-board computer monitors for any sign of rear drive wheel slip (loss of traction)

If loss of traction is detected, the center differential is told to send a share of the engine\'s torque to the front drive wheels. It will not let the front driveshaft turn at the same speed as the rear driveshaft.



What about traction management?

1997-2002 model Ford Expeditions offered an optional limited-slip rear differential (LSD). A conventional open rear differential was standard along with the conventional open front differential and the electronic locking center differential.

comment with out LSD, one tire can spin, on say ice.

but the other 3 tires dont, in full time.

Jul 04, 2014 | 2003 Ford Expedition

1 Answer

2OO9 Silverado, turned 4 wheel drive knob, light blinks, doesnt go into 4 wheel, service 4 wheel on dash


You'll need to have someone with a scanner check the body computer for trouble codes.
The computer found a problem with the system.

Feb 09, 2013 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

My 1999 Rav 4 is normally a front wheel drive but can switch to 4 wheel drive. Do I need alignment in all 4 wheels or just the front?


Most alignment shops these days use a 4 wheel system,so they see all 4 wheels anyway,I would try to tell the shop if the rear is ok ,just do the front.
That 2 wheel 4 wheel price is a moneymaker
So hard to find an honest shop.

Apr 10, 2012 | 1999 Toyota RAV4

1 Answer

Transfer case dose not sfift when cold. First off throws service 4 wheel drive light. After driving for a little while i shut eng off and restart and every thing back to normal. Have replaced transfer...


have you serviced the 4 wheel drive with new fluid? draining and refilling the system with the proper fluid may cure this problem. then reset the life meter for the 4 wheel drive system. hope this helps

Jan 29, 2011 | GMC Sierra 1500HD Cars & Trucks

1 Answer

Service 4 wheel drive comes on at times on 2002 trailblazer


there is something wrong with you 4wd system might be electrial problem get it check be gmc service tech for diag code

Mar 08, 2009 | 1999 GMC Jimmy

1 Answer

Service 4 wheel drive, service electronic brake warning


This is caused by by a bad ignition switch. According to the dealer the ignition switch contains an antenna that many of the sensors use to communicate with the vehicle, as well as the key fob. When the switch starts going bad the vehicle computer losses communication with these sensors and starts producing codes which include the 4wd and the electronic brakes. My fiance has had the same issues with her Grand Cherokee as well as the key fob not working, the remote start not working, the service engine light comes on, the door chime will sound when the key is NOT in the ignition and the lights are NOT on, as well as numerous codes usually relating to loss of communication with one system or another. All of which are fixed once the ignition switch is replaced. Unfortunately, this usually only fixes the problem for a short time (weeks or maybe a few months) before the piece of junk ignition switch fails again and it all starts over.

Jul 15, 2008 | 2005 Jeep Grand Cherokee

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