B1404 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1404 – Driver Side Airbag Deployment Control Circuit
B1404 Possible Symptoms
Air Bag Warning Light ON
B1404 Possible Causes
Faulty Driver Side Airbag,Driver Side Airbag harness is open or shorted,Driver Side Airbag circuit poor electrical connection,Faulty Restraint Control Module (RCM)
The Restraint Control Module (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 Diagnostic Trouble Code (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.