DTC B1B5A-49: Rear Side Ultrasonic Sensor (RH) Signal Circuit Malfunction [Vehicle Control Module]: Outline

DTC B1B5A:49 [VEHICLE CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Rear side ultrasonic sensor (RH) signal circuit malfunction
Detection condition	The vehicle control module (VCM) detects that the parking assist unit (ultrasonic) determined that there is a malfunction in the rear side ultrasonic sensor (RH) signal circuit for 11 s.
Fail-safe	(See DTC TABLE [VEHICLE CONTROL MODULE (US)] .)
Possible cause	Rear bumper malfunction Rear side ultrasonic sensor (RH) connector or terminal malfunction Parking assist unit (ultrasonic) connector or terminal malfunction Short to ground in rear side ultrasonic sensor (RH) signal circuit Short to power supply in rear side ultrasonic sensor (RH) signal circuit Open circuit in rear side ultrasonic sensor (RH) signal circuit Rear side ultrasonic sensor (RH) malfunction Parking assist unit (ultrasonic) malfunction
Courtesy of MAZDA MOTORS CORP.