DTC U0515-68: Error Signal Received From Start Stop Unit: Notes

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0515:68 BLIND SPOT MONITORING (BSM) CONTROL MODULE DETECTION CONDITION AND POSSIBLE CAUSE

Description	Error Signal Received From Start Stop Unit
Detection condition	Blind spot monitoring (BSM) control module receives the error signal from the start stop unit for 1 s or more.
Fail-safe	Blind spot monitoring (BSM) system is stopped.
Possible cause	DTCs are stored in the start stop unit. Start stop unit malfunction Blind spot monitoring (BSM) control module malfunction
System wiring diagram	Not applicable