Pinpoint Test Ah: Lost Communication With Pcm: Notes
Normal Operation and Fault Conditions
The OCSM and RCM and BECAME use information contained in messages from the PCM sent on the HS-CAN.
PPT AH BECAME DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
PPT AH OCSM DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0100:00 | Lost Communication with ECM/PCM "A": No Sub Type Information | This DTC sets if the OCSM does not receive an expected message from the PCM. |
PPT AH RCM DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0100:00 | Lost Communication with ECM/PCM "A": No Sub Type Information | This DTC sets if the RCM does not receive an expected message from the PCM. |
Possible Causes
- Network communication concern
- OCSM concern
- RCM concern
- PCM
- BCM and BECAME
- Incorrect BECAME configuration
- Incorrect BECAME installed
NOTE:
Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE:
Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
NOTE:
Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, DTCs may set.