B1B54 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1B54 – 1st Row Passenger Seat Belt Sensor Circuit Low

 

B1B54 Possible Symptoms

 

Air Bag Warning Light ON

 

B1B54 Possible Causes

 

Faulty Passenger Seat Belt Buckle Switch,Passenger Seat Belt Buckle Switch harness is open or shorted,Passenger Seat Belt Buckle Switch circuit poor electrical connection,Faulty Occupant Restraint Controller (ORC)

 

B1B54 Description

 

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Passenger Seat Belt Buckle Switch circuits every 100 ms to verify the integrity of the switch and wiring. The front seat belt switches cannot be adjusted or repaired and, if ineffective or damaged, the entire front seat belt buckle-half unit must be replaced. The airbag warning lamp will display in the instrument cluster for this fault. While the ignition on and the Occupant Restraint Controller (ORC) is configured for a Passenger Seat Belt Switch, the ORC checks the switch input current ranges. The ORC monitors the switch input current ranges at power up and continuously every 100ms with the ignition in on.