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Derrick, ASE Certified Technician
Category: Jeep
Satisfied Customers: 923
Experience:  A.S.-Automotive Analysis A6-Electrical A8/L1-Engine Performance Cert., CA Chrysler/Jeep/Dodge Tech
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what does service 4wd system light mean

Customer Question

what does service 4wd system light mean
Submitted: 8 years ago.
Category: Jeep
Expert:  Derrick replied 8 years ago.

Hi there,

This is a relatively common problem on these new Grand Cherokees. There is a TSB (Technical Service Bulletin) that Chrysler has released for this problem. THe TSB involves reprogramming the sofware in your FDCM (Final Drive Control Module). This is done with a scan tool at your local Jeep dealer.

If this does not fix it, it will most likely need a new actuator in your front differential, they also go bad all the time on these Jeeps.


I hope this helps! Let me know if you have any more questions!