DTC U0100-00: Pcm Communication Error: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.

System malfunction location	PCM communication error
Detection condition	The SAS control module does not receive CAN signal from PCM for 5 s or more , or receives CAN signal error from PCM for 0.4 s.
Fail-safe function	Not applicable
Possible cause	Malfunction in CAN line between the SAS control module and PCM PCM malfunction SAS control module malfunction
System wiring diagram	Not applicable