Pinpoint Test S : U0028:88, U0151:00: Notes
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Vehicle Dynamic Systems for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the RCM sends messages to the ABS module the HS-CAN and a private HS-CAN. If the ABS module does not receive these messages within the specified time frame, the module sets a DTC. This can be due to a RCM failure, a circuit failure on the HS-CAN, an excessive load on the network or a circuit failure on the private HS-CAN. For information on the messages sent to the ABS module by the RCM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - Overview .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0028:88 | Vehicle Communication Bus "A": Bus Off | This DTC sets in continuous memory and on-demand due to a circuit failure in the private HS-CAN between the ABS module and the RCM. |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | This DTC sets in continuous memory and on-demand if the expected RCM messages such as yaw rate sensor, lateral and longitudinal accelerometers are missing for more than 5 seconds. |
Possible Causes
- Wiring, terminals or connectors
- Over or undervoltage concerns
- RCM
- ABS module