Pinpoint Test I : DTC U0140: Notes
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
| Refer to Wiring Diagram Module Communications Network
for schematic and connector information. Normal Operation and Fault Conditions The TCM sets the DTCs U0140 when key messages are not received for longer than 5 seconds. Other modules that require data from the BCM all set communication DTCs and may also exhibit system function concerns. DTC Fault Trigger Conditions |
|---|
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| TCM U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | Sets in continuous memory in the TCM if BCM data messages such as tire size, axle ratio, global real time, engine off time received from the BCM over the HS-CAN are missing for longer than 2 seconds. |
Possible Sources
Communication concern
Battery voltage concern
BCM
TCM