O: LFC 41/DTC B1941-Ext Crash Sensor Open Ckt/Short to Batt

Normal Operation
The external crash sensor monitors the severity of a crash event. If the crash event is severe enough, the sensor will close and signal the Electronic Crash Sensor (ECS) module to deploy the air bags. The external crash sensor contains a 787 ohm resistor.

The ECS measures the resistance to verify that the crash sensor is correctly mounted and connected. If there is a short to battery or an open on circuit 619 (PK/WH), the ECS will store a Diagnostic Trouble Code (DTC) B1941 in memory and flash a Lamp Fault Code (LFC) 41 (or higher priority code if one exists) on the air bag indicator.


Possible Causes
An external crash sensor open circuit or short to battery condition can be caused by:
- damaged wiring on circuit 619 (PK/WH).
- damaged external crash sensor.
- a short to battery on circuit 619 (PK/WH).

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