DTC B10A6-57: Light Switch Circuit Malfunction (BCM) (Us): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC B10A6:57 (BCM) (US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Light switch circuit malfunction
Detection condition	The instrument cluster received the error signals from the light switch.
Fail-safe	Not applicable
Possible cause	Light switch connector or terminal malfunction Light switch malfunction Instrument cluster connector or terminal malfunction Short to ground in light switch signal circuit Open circuit in light switch signal circuit Open circuit in light switch ground circuit Instrument cluster malfunction Body control module (BCM) malfunction
Courtesy of MAZDA MOTORS CORP.

*1: With auto light system