Pinpoint Test BH : DTC U0140: Notes

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

Normal Operation 

The Driver Seat Module (DSM) and the BCM communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN.

• 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