Pinpoint Test E : Lost Communication With Abs (Anti-Lock Brake System) Module U0121:87: Notes
WARNING: This page is about a different car, the 2018 Ford EcoSport. 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.
Normal Operation and Fault Conditions
REFER to: Communications Network .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| BCM U0121:87 | Lost Communication With Anti-Lock Brake System (ABS) Control Module "A": Missing Message | A continuous memory DTC that sets in the BCM if messages from the ABS module through the GWM are missing. |
Possible Sources
- Communication network concern
- Battery voltage concern
- GWM
- ABS module
- BCM
NOTE:
If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the PMI or the PMI may not have been carried out.