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 Descriptors

DTC B0052 00: Passenger Airbag Locked By AOS (Automatic Occupancy Sensing)
DTC B0054 00: Passenger Side Airbag Locked By AOS (Automatic Occupancy Sensing)
DTC B0058 00: Passenger Pretensioner Locked By AOS (Automatic Occupancy Sensing)

### 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 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 B0052 set 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 B0054 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.

DTC B0058 set 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 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 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.

• | An empty front passenger seat

• | A PPS fault was detected

### Action Taken When the DTC Sets

• | DTC B0052 and B0058 will only set if there is a child seated or a the passenger seat is empty.

• | DTC B0051, B0053, or B0055 will set along with this DTC.

• | The SDM commands the AIR BAG indicator ON.

### Conditions for Clearing the DTC

Any of the codes will set along with one of the following latched codes: DTC B0051, B0053, or B0055 and cannot be cleared.

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

SIR System Description and Operation

#### 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

1. 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.

2. Verify DTC B0051, B0053, or B0055 is not set.

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

3. Clear DTCs. Verify DTC B0052, B0054, 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