B0053
DTC B0052 or B0053
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 B0052 to set.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
* DTC B0052 Deployment Commanded
* DTC B0053 Deployment Commanded with Loop DTCs Present
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:
B0052
* The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal modules.
* The SDM detects a side impact of sufficient force to warrant deployment of a side impact module and/or roof rail module.
* The SDM has deployed the seat belt pretensioner for 3 separate deployments.
B0053
SDM commands inflators deployment with loop faults present.
Action Taken When the DTC Sets
* The SDM will only set DTC B0052.
* The SDM sets DTC B0053 along with DTC B0052.
* The SDM commands the AIR BAG warning lamp ON via GMLAN serial data.
* The SDM records crash data.
Conditions for Clearing the DTC
DTC B0052 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.
DTC B0052 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.
Diagnostic Aids
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 B0052 sets and becomes a latched code, which cannot be cleared.
When DTC B0053 is accompanied by additional DTCs, other than B0052, repair the malfunction causing the other DTCs before replacing SDM.
Test
