Pinpoint Test I : DTC U0100: Notes
WARNING: This page is about a different car, the 2019 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0100
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
The GSM and TRCM use information contained in messages from the PCM sent on the HS-CAN.
NOTE:
If a GSM self-test is to be performed, make sure the drivers door is closed and locked.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0100 | Lost Communication With ECM/PCM "A" | This DTC sets if the GSM and/or TRCM does not receive some or all of an expected message from the PCM. |
Possible Sources
- Connectors damaged or pushed-out terminals, circuitry open, shorted to power or shorted to ground
- PCM