Like many of you have experienced: JEEP Grand Cherokee MY 14 etc was found to be fitted with an out-dated, defective mapping system: Q-4 of 2012 for Australia. FCA did NOT disclose this shortcoming at the time of purchase. At long last, after more than 5 years, FCA now have an update available: effective February 2018.
Suggestion: to contact FCA CEO Steve Zanlunghi at
steve.zanlunghi@fcagroup.com and request him to issue an authorisation to get it installed at NO CHARGE. Don't take no for an answer: your rights are protected by the ACCC.
Good Luck!