DTC B12E2-13: Rear Door Lock-Link Switch (LH)/(RH) Unlock Circuit Malfunction (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 B12E2:13 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Rear door lock-link switch (LH)/(RH) unlock circuit malfunction
Detection condition	The body control module (BCM) detects an open circuit in the rear door lock-link switch (LH)/(RH) unlock circuit for a continuous 2 times. Preconditions The rear door lock-link switch unlocked.
Fail-safe	Not applicable
Possible cause	Rear door latch and lock actuator (LH) connector or terminal malfunction Rear door latch and lock actuator (RH) connector or terminal malfunction Open circuit in rear door lock-link switch (LH) ground circuit Open circuit in rear door lock-link switch (RH) ground circuit Rear door lock-link switch (LH) malfunction Rear door lock-link switch (RH) malfunction Body control module (BCM) connector or terminal malfunction Open circuit in rear door lock-link switch (LH)/(RH) unlock circuit Body control module (BCM) malfunction
Courtesy of MAZDA MOTORS CORP.