Circuit Deactivation Ignition Module (CDIM)
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Vehicles equipped with a 6.7L diesel engine may also be equipped with a Circuit Deactivation Ignition Module (CDIM), which is part of the engine idle shutdown system. The role of the CDIM is to disconnect the ignition switch circuits once the engine has shut down in order to prevent possible battery drain. The engine idle shutdown system is controlled by the PCM, refer to the INTRODUCTION - DIESEL MODELS for information on the engine idle shutdown system.