DTC C1446 [Dynamic Stability Control (DSC)]: Notes

DTC C1446 DETECTION CONDITION AND POSSIBLE CAUSE

DTC C1446	Brake switch
DETECTION CONDITION	Brake switch ON signal is input for 6 min or more  when driving at a vehicle speed of 20 km/h {12.4 mph} or more.  Brake switch ON signal is not input even though the DSC HU/CM determines vehicle deceleration.
POSSIBLE CAUSE	Open or short circuit in the wiring harness between brake switch and the terminal on the PJB Open or short circuit in the wiring harness between the terminals on the PJB and PCM Brake switch malfunction Poor connection at connectors (female terminal)
Courtesy of MAZDA MOTORS CORP.