Pinpoint Test S : U0100:87: Notes
WARNING: This page is about a different car, the 2015 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
When the ignition is transitioned out of off, the BCM receives the PCM ID. If the BCM does not receive the PCM ID or the ID is invalid, the PATS does not allow the engine to start.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0100:87 | Lost Communication With ECM/PCM "A": Missing Message | A continuous memory DTC that sets when the BCM does not receive the ID from the PCM over the HS-CAN. The ID is only sent one time per ignition cycle and is sent within milliseconds of the ignition being transitioned out of off. |
Possible Sources
- Battery voltage concern
- PCM