DTC U0301-09; Error Signal Received From Pcm: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

Description	Error signal received from PCM
Detection condition	Radar unit receives the following signals from the PCM. Brake switch error signal Cruise control switch error signal PCM internal malfunction signal Cruise control error signal Engine speed error signal Accelerator opening angle error signal
Fail-safe	Inhibits the mazda radar cruise control (MRCC) system control
Possible cause	DTCs are stored in the PCM. PCM malfunction DTCs are stored in the DSC HU/CM. DSC HU/CM malfunction Radar unit malfunction
System wiring diagram	Not applicable