Pinpoint Test G : U0121:87, U0415:00: Notes
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
With the ignition ON, the ABS module sends messages to the VDM over the HS-CAN. If the VDM does not receive these messages within a certain time frame, the VDM sets DTCs. For information on the network messages sent to the VDM by the ABS module, refer to Vehicle Dynamic Suspension .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0121:87 | Lost Communication with Anti-Lock Brake System (ABS) Control Module: Missing Message | This DTC sets in continuous memory if any one of the following ABS module messages is missing; ABS active, brake torque, ESC active, RSC ® mode, stability-traction control indicator active, traction control mode, vehicle lateral acceleration, vehicle longitudinal acceleration, vehicle roll rate, vehicle vertical acceleration or yaw stability index. This can be due to an ABS module failure, a circuit failure on the HS-CAN or an excessive load on the network. |
| U0415:00 | Invalid Data Received from Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | This DTC sets in continuous memory if any one of the following ABS module messages contains "invalid" instead of the valid message data; ABS active, brake torque, ESC active, RSC ® mode, stability-traction control indicator active, traction control mode, vehicle lateral acceleration, vehicle longitudinal acceleration, vehicle roll rate, vehicle vertical acceleration or yaw stability index. |
Possible Causes
- Network communication concern
- Vehicle battery
- Charging system concern
- ABS module