B0051
DTC B0051
Circuit Description
The inflatable restraint sensing and diagnostic module (SDM) contains a sensing device that converts vehicle velocity changes into an electrical signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the deployment loops, deploying the air bags and/or pretensioners causing DTC B0051 to set.
Important: The seat belt pretensioners may deploy for impacts that are not severe enough to warrant frontal or side air bag deployment. The SDM is capable of sustaining 3 pretensioner deployment events, or 1 frontal or side deployment event. After the maximum number of deployments has occurred, DTC B0051 becomes a latched code, which cannot be cleared.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B0051 Deployment Commanded
Conditions for Running the DTC
Ignition 1 voltage must be within the normal operating range.
Conditions for Setting the DTC
The DTC will set if one of the following conditions occurs.
* The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal inflator modules and/or pretensioners.
* The SDM detects a side impact of sufficient force to warrant deployment of a roof rail inflator module.
Action Taken When the DTC Sets
* The SDM commands the AIR BAG warning lamp ON via Class 2 serial data.
* The SDM records crash data.
Conditions for Clearing the DTC
DTC B0051 can be cleared if the following conditions are met.
* Three consecutive seat belt pretensioner deployment events have not occurred
* One frontal or side air bag deployment has not occurred.
* The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
* A history DTC will clear once 255 malfunction-free ignition cycles have occurred.
DTC B0051 becomes a latched code after 3 consecutive pretensioner deployments or 1 frontal or side air bag deployment. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.
Test
