DTC B13DE-87: Communication Error With Front Map Light (BCM): 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 B13DE:87 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Communication error with front map light
Detection condition	The body control module (BCM) cannot receive the signals from the front map light.
Fail-safe	Not applicable
Possible cause	Front map light connector or terminal malfunction Body control module (BCM) connector or terminal malfunction Short to ground in front map light LIN communication line Open circuit in front map light LIN communication line Front map light malfunction Body control module (BCM) malfunction
Courtesy of MAZDA MOTORS CORP.