The inflatable restraint sensing and diagnostic module (SDM) contains a sensing device that converts vehicle velocity and convert this to a electrical signal. The SDM processes the generated electrical signal and compares the signal to a value stored in memory. If the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the air bags. DTC B0053 will set instead of a DTC B0052 when a deployment occurs while an inflator circuit fault is present that may result in a non-deployment situation in one or more inflator modules.
This diagnostic procedure supports the following DTC:
DTC B0053 Deployment Commanded with Loop DTCs Present
Ignition 1 voltage must be present.
SDM commands inflators deployment with loop faults present.
• | The SDM sets DTC B0052. |
• | The SDM sets DTC B0053. |
• | The SDM commands the AIR BAG warning lamp ON via GMLAN serial data. |
• | The SDM records crash data. |
DTC B0053 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.
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 B0053 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.
Step | Action | Yes | No |
---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the vehicle show any signs of air bag deployment? | Go to Step 5 | Go to Step 3 |
3 | Inspect the vehicle and undercarriage for signs of impact/collision. Does the vehicle show any signs of impact/collision? | Go to Step 5 | Go to Step 4 |
4 |
Did you complete the replacement? | Go to Step 6 | -- |
5 | Replace all the components and perform inspections as required following an accident. Refer to Repairs and Inspections Required After a Collision . Did you complete the appropriate inspections and necessary repairs? | Go to Step 6 | -- |
6 |
Did you complete the repair? | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | -- |