B1C4F Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1C4F – 1st Row Passenger Seat Belt Buckle Tensioner Circuit Shorted Together

 

B1C4F Possible Symptoms

 

Air Bag Warning Light ON

 

B1C4F Possible Causes

 

Faulty 1st Row Passenger Seat Belt Buckle Tensioner,1st Row Passenger Seat Belt Buckle Tensioner harness is open or shorted,1st Row Passenger Seat Belt Buckle Tensioner circuit poor electrical connection,Faulty Occupant Restraint Controller (ORC)

 

B1C4F Description

 

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. These circuits are maintained in a floating configuration at the module (connected to neither power nor ground) as protection against inadvertent deployment. The use of the Supplemental Restraints System (SRS) Load Tool Adapter provides a test point as well as a method for opening the shorting bar connections within the harness connector. The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 500 ms thereafter while the ignition is in on. The module then monitors the data return wire to determine the state of the circuit.