B0052

DTC B0052

DTC DESCRIPTOR

DTC B0052
Deployment Commanded

DTC B0053
Deployment Commanded with Loop DTCs Present

DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

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 inflators deployment with loop faults present.

ACTION TAKEN WHEN THE DTC SETS
- The SDM will only set DTC B0052 or the SDM sets DTC B0053 along with DTC B0052.
- The SDM commands the AIR BAG warning lamp ON via serial data communications.
- 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 one 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.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, inspect the vehicle for signs of inflator module or pretensioner deployment. Verify that the vehicle does not show any signs of inflator deployment.
- If the vehicle displays any signs of inflator deployment, refer to Repairs and Inspections Required After a Collision.
2. Use a scan tool and observe the SIR DTC display, refer to Diagnostic Trouble Code (DTC) List - Vehicle. The scan tool should indicate DTC B0052 is not set. Diagnostic Trouble Code Descriptions
- If DTC B0052 is set use the scan tool and clear all DTCs. Then recheck for any DTCs, if DTC B0052 does not clear or resets then replace the SDM.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for SDM replacement, setup, and programming