Thank you for using WJdiag diagnostic application.WJdiag is made for diagnosing issues on Jeep Grand Cherokee 2002-2004 year, WJ/WG models. On 2.7 CRD Jeep model are supported all electronic modules that car have. On gasoline and 3.1 diesel model are supported all electronic modules except Engine and Transmission.In addition WJdiag can access to many Chrysler … Continue reading WJdiag Tutorial