Scan code
Here is a good forum to check out for your P0700 code
http://www.obd-codes.com/forums/viewtopic.php?f=1&t=8914
SOURCE: Service 4 wheel drive
The service 4 wheel drive light comes on because there's a problem. The biggest causes of this I've seen are a software glitch in the final drive control module which the dealer can fix by reprogramming and the other is usually the electric actuator on the front axle housing. The only light that comes on by a timer is the one that says, "perform service" in your overhead console or odometer.
SOURCE: 1999 jeep grand cherokee all time four wheel drive will not engage
Sounds like the splines on your transfer case gear are ground down
SOURCE: Jeep Grand Cherokee Limited P0700 diagnostic problem
P0700 means there is a transmission fault code in the transmission controller. Since the transmission controller doesn't have a light attached, it tells the engine controller to turn the light on using this code. You'll have to access the transmission controller to further diagnose the problem.
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.
SOURCE: Jeep grand Cherokee stuck in 4 wheel drive.
Hello nicky...Check the transfer case linkage and see if it is working freely....the linkage could be hung between 2wd and 4wd. You may be able to keep working the linkage and free it up...the bushings may be worn and the linkage may need adjustment also. The transmission mounts will wear and keep it from moving freely. Try driving in reverse for a block or so...a lot of the wrangler and cherokee owners claim this works for them.
Good luck...i hope this helps, please rate me a fixya.
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