Possible Sensor Faults
SDM - Sensing and Diagnostics Module (Airbag Black Box)
Possible Related Diagnostic Trouble Codes
DTC B1346-B1349
Circuit / System Description
During a frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. There are shorting bars used within the steering wheel module coil connector which will short together the steering wheel module high circuit and steering wheel module low circuit when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.
