Pinpoint Test BA : DTC U0140: Notes

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Module Communications Network , for schematic and connector information.

Refer to Memory Seats , for schematic and connector information.

Normal Operation

The DSM and the BCM communicate using the MS-CAN. Messages are exchanged between the modules on the MS-CAN for the purposes of determining what functions are being carried out.

DTC U0140 (Lost Communication With Body Control Module (GEM)) - set by the DSM whenever it has lost communication to the BCM for 15 seconds or longer as long as the module voltage is between 10 and 15 volts.

This pinpoint test is intended to diagnose the following:

Module communication
DSM
BCM