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 turn ON the passenger air bag status OFF indicator. |
| • | The SDM commands the AIR BAG indicator ON via serial data communications. |
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
SIR Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
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 DTC is set as current, clear codes, if DTC resets, replace the SDM. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
