For 1990-2009 cars

### 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 Descriptor

DTC B0057 00: Passenger Side Air Bag Suppressed

### Circuit/System Description

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 passenger side impact module (front seat air bag). When the PPS detects a fault within itself, then the PPS will communicate to the SDM through GMLAN communications that a PPS fault is present. The SDM will suppress the deployment of the module and then turn the AIR BAG indicator ON.

### Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

### Conditions for Setting the DTC

This DTC is set 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 occupants weight is less than a specified value. The PPS module sent a suppress signal to the SDM to suppress the side impact module.

• | Empty front passenger seat

• | A PPS fault was detected

### Action Taken When the DTC Sets

• | The SDM sets a DTC B0057.

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

• | The SDM commands ON the AIR BAG warning lamp via serial data communications.

### Conditions for Clearing the DTC

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

### Diagnostic Aids

This code set 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.

### 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

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

• | Scan Tool Data List

• | Scan Tool Data Definitions

### Circuit/System Testing

1. 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 .

2. With a scan tool, verify DTC B0052, B0053, or B0055 is not set.

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

3. With a scan tool, clear DTCs, verify DTC B0057 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