DTC B0052 or B0053. Chevrolet Tahoe

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2009 🢒 Tahoe - 2WD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B0052 or B0053

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B0052 00: Deployment Commanded

DTC B0053 00: Deployment Commanded With Loop DTCs Present

The inflatable restraint sensing and diagnostic module (SDM) contains a 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 or B0053 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 requests the instrument panel cluster (IPC) to illuminate the Service Air Bag indicator.

•	The SDM records crash data.

Conditions for Clearing the DTC

After an air bag deployment or 3 separate pretensioner deployments the DTC becomes latched and cannot be cleared.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

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 the SDM.

Ignition OFF, verify no signs of inflator module or pretensioner deployment exist.

⇒	If any signs of deployment exist, refer to Repairs and Inspections Required After a Collision.

Verify DTC B0053 is not set.

⇒	If the DTC B0053 is set along with additional DTCs, other than B0052, repair the malfunction causing the DTCs before replacing the SDM. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.

Verify DTC B0052 is not set.

⇒	If DTC B0052 is set, clear DTCs. If the DTC sets, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to Control Module References for SDM replacement, setup, and programming