All Locks Inoperative From Driver Door Module

WARNING: This page is about a different car, the 2002 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes are:

DDM BUS COMMUNICATION CHECK
DDM LOCKS INOPERATIVE

Using the DRBIII(R), select BODY, DOOR MODULES. Does the DRBIII(R) display Part No. and Version No. of the Driver Door Module? If yes, go to next step. If no, diagnose communication problem. See BUS +/- SIGNALS OPEN OR NO RESPONSE FROM DRIVER DOOR MODULE under COMMUNICATIONS. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS.
If there are no possible causes remaining, replace the Driver Door Module. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS.