B141B Code: Meaning, Causes, and Symptoms | OBD2 Codes

B141B – Second Row Driver Inflatable Seatbelt Deployment Control Circuit


B141B Possible Symptoms


Air Bag Warning Light ON


B141B Possible Causes


Faulty Second Row Driver Inflatable Seatbelt,Second Row Driver Inflatable Seatbelt harness is open or shorted,Second Row Driver Inflatable Seatbelt circuit poor electrical connection,Faulty Restraint Control Module (RCM)


B141B Description


The Restraint Control Module (RCM) continuously monitors the second row left safety belt inflator and circuits for the following faults: Resistance out of range, Unexpected voltage, Short to ground, Faulted second row left safety belt inflator. If a fault is detected, the RCM stores DTC B141B in memory and sends a message to the Instrument Panel Cluster (IPC) to illuminate the airbag warning indicator. The RCM analyzes the deployment loop resistance to determine if a fault exists. The value displayed in the PID is the deployment loop resistance measured by the RCM. If the value displayed is lower or higher than the desired range, the RCM can set a DTC. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. Small variations in resistance can occur due to the effect of road vibrations on terminal fit. Crimps and terminals can be affected by stress and harness movement and can cause an increase in resistance due to wire strain. These variables can result in an intermittent fault. For this reason, the test requires the PID value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC at the time of diagnosis. Following this direction helps make sure that minor changes in resistance do not create a repeat concern.