DTC U0515 00: Error Signal Received From Start Stop Unit: Notes

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0515:00 (VEHICLE CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Error signal received from start stop unit
Detection condition	Communication error between start stop unit and vehicle control module (V/C-module)
Fail-safe	Inhibits the Mazda radar cruise control (MRCC) system control Inhibits the forward obstruction warning (FOW) system control^1 ^1 : Enabled depending on malfunction content.
Possible cause	Start stop unit malfunction Vehicle control module (V/C-module) malfunction
System wiring diagram	Not applicable