Pinpoint Test F : U0100:87, U0401:00: 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 PCM 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 PCM, refer to Vehicle Dynamic Suspension .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0100:87 | Lost Communication With ECM / PCM: Missing Message | This DTC sets in continuous memory if any one of the following PCM messages is missing; accelerator pedal position, ambient air temperature, drive torque, engine RPM, gear lever position or vehicle speed. This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network. |
| U0401:00 | Invalid Data Received from ECM / PCM "A": No Sub Type Information | This DTC sets in continuous memory if any one of the following PCM messages contains "invalid" instead of the valid message data; accelerator pedal position, ambient air temperature, drive torque, engine RPM, gear lever position or vehicle speed. |
Possible Causes
- Network communication concern
- Vehicle battery
- Charging system concern
- PCM