DTC B0056-B0058. Buick Enclave 2008

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2008 🢒 Enclave 🢒 DTC 🢒 DTC B0056-B0058

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 B0056 00: Passenger Frontal Airbag Suppressed

DTC B0057 00: Passenger Side Airbag Suppressed

DTC B0058 00: Passenger Pretensioner Suppressed

When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The PPS is used to monitor the weight of an occupant in the front passenger seat. If the pressure from the occupant's weight is less than a specified value or an empty seat is detected, the PPS module will send a suppress signal to the SDM to disable the instrument panel (I/P) module. When the PPS detects a fault within itself, then the PPS will communicate to the SDM through serial data communications that a PPS fault is present. The SDM will suppress the deployment of the module and then illuminate the AIR BAG indicator.

DTC B0056 sets because the PPS commanded to suppress the I/P inflator module when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

DTC B0057 sets because the PPS commanded to suppress the side impact module when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

DTC B0058 sets because the PPS commanded to suppress the seat belt pretensioner when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

This DTC sets when the SDM has commanded an air bag deployment while the PPS has determined that the front passenger seat has one the following conditions:

•	The pressure from the occupant's weight is less than a specified value. The PPS module sent a suppress signal to the SDM to suppress the I/P module.

•	Empty front passenger seat

•	A PPS fault was detected

Action Taken When the DTC Sets

•	DTC B0056 and B0058 will only set if there is a child seated or the passenger seat is empty.

•	DTC B0052, B0053, or B0055 will set along with this DTC.

•	The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Conditions for Clearing the DTC

Any of the codes will set along with one of the following latched codes: DTC B0052, B0053, or B0055 and cannot be cleared.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

•	Connector Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition OFF, verify that the vehicle does not show any signs of inflator module or pretensioner deployment.

⇒	If the vehicle displays any signs of inflator deployment, refer to Repairs and Inspections Required After a Collision.

Verify DTC B0052, B0053, or B0055 is not set.

⇒	If DTC is set , refer to Diagnostic Trouble Code (DTC) List - Vehicle.

Clear DTCs. Verify DTC B0056, B0057, or B0058 is not set.

⇒	If DTC is set, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	SIR/SRS Wiring Repairs

•	Control Module References for SDM replacement, setup, and programming