Test N: LFC 48/DTC B2444 - Driver Side Crash Sensor Internal Fault

N1 - N2:

Normal Operation

WARNING:
^ VEHICLE SENSOR ORIENTATION IS CRITICAL FOR PROPER SYSTEM OPERATION. IF A VEHICLE EQUIPPED WITH AN AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) IS INVOLVED IN A COLLISION, INSPECT THE SENSOR MOUNTING BRACKET AND WIRING PIGTAIL FOR DEFORMATION. REPLACE AND PROPERLY POSITION THE SENSOR OR ANY OTHER DAMAGED SUPPLEMENTAL RESTRAINT SYSTEM (SRS) COMPONENTS WHETHER OR NOT THE AIR BAG IS DEPLOYED.
^ THE TIGHTENING TORQUE OF THE AIR BAG SIDE CRASH SENSOR RETAINING BOLTS IS CRITICAL FOR CORRECT SYSTEM OPERATION.

The driver side crash sensor monitors the severity of a crash event. if the crash event is severe enough, the sensor will signal the Restraints Control Module (RCM) to deploy the driver side air bag.

The RCM monitors the two-wire current loop to the driver side crash sensor for a signal that is out of the expected range. If the RCM detects an out-of-range signal from the driver side crash sensor, indicating an internal fault, it will store Diagnostic Trouble Code (DTC) B2444 and flash a Lamp Fault Code (LFC) 48 (or a higher priority code if one exists) on the air bag indicator.

Possible Causes
A driver side crash sensor internal fault condition can be caused by:
^ damaged wiring on circuit 1261 (WH/LG).
^ damaged wiring on circuit 1262 (BN/LG).
^ damaged driver side crash sensor.