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Home >> Mazda >> 2021 >> CX-3 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Body Control Module >> DTC U0515-41: Error Signal Received From Start Stop Unit (BCM) >> Notes
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DTC U0515-41: Error Signal Received From Start Stop Unit (BCM): Notes

DTC U0515:41 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

Description Error signal received from start stop unit
Detection condition
  • Check sum error occurred on communication with the BCM and the start stop unit 3 times continuously with the ignition switched ON (engine off or on).
Fail-safe Exterior lighting system
  • Turn the TNS (parking lights) and headlights LO on, and turn off other exterior light controls.

Auto light system
  • Continue the controls prior to the auto light malfunction detection.

Windshield wiper system
  • Continue the controls prior to the windshield wiper malfunction detection.

Front washer system
  • Stop the front washer control.

Auto wiper system
  • Continue the controls prior to the windshield wiper malfunction detection.
Possible cause
  • Start stop unit malfunction
  • BCM malfunction
System wiring diagram Not applicable