Pinpoint Test O : Lost Communication: Notes
WARNING: This page is about a different variant/trim than selected.
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
The TCM uses information contained in messages from the BCM sent on the HS-CAN.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0140 | Lost Communication With Body Control Module | This DTC sets if the TCM does not receive an expected message from the BCM. |
| U0141 | Lost Communication With Body Control Module "A" | This DTC sets if the TCM does not receive an expected message from the BCM. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- BCM