DTC B152B-02: Half Latch Switch 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 B152B:02 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Half latch switch circuit malfunction
Detection condition	The power liftgate (PLG) control module detects that the half latch switch is in the off condition and does not change even though the power liftgate (PLG) drive unit motor rotation speed exceeds 10 times. Preconditions The power liftgate (PLG) system is operating.
Fail-safe	Stops the power liftgate (PLG) system operation.
Possible cause	Liftgate latch and lock actuator connector or terminal malfunction Open circuit in liftgate latch and lock actuator ground circuit Power liftgate (PLG) control module connector or terminal malfunction Short to ground in half latch switch signal circuit Short to power supply in half latch switch signal circuit Open circuit in half latch switch signal circuit Half latch switch malfunction Power liftgate (PLG) control module malfunction Body control module (BCM) malfunction
Courtesy of MAZDA MOTORS CORP.