Diagnostic Instructions
DTC Descriptors
DTC B0052: Deployment Commanded
DTC B0053: Deployment Commanded with Loop DTCs Present
Circuit/System 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.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
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 the inflator deployment with loop faults present.
Action Taken When the DTC Sets
| • | The PPS will set a DTC, and then communicate with the SDM via non GMLAN circuit. |
| • | The SDM will set DTC B0081. |
| • | The SDM disables the I/P module deployment loop. |
| • | The PPS will illuminate the passenger air bag status OFF indicator. |
| • | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator. |
Conditions for Clearing the DTC
| • | Three consecutive seat belt pretensioner deployment events have not occurred. |
| • | One frontal or side air bag deployment has not occurred. |
Reference Information
Schematic Reference
SIR Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
- Verify that DTC B0052 is not set.
| ⇒ | If DTC is set, replace the SDM. |
- Verify that DTC B0053 is not set.
| ⇒ | If the DTC is set as current, clear codes, if the DTC resets, replace the SDM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
