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 B1530: Discard Passenger Presence System 1

### Circuit/System Description

When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within the Passenger Presence System (PPS). When the SDM has completed the power-up mode, the SDM will establish communication with the PPS. The SDM will increase a fault counter with each ignition cycle that a fault exists with the PPS. The SDM will lock out the PPS after a predetermined ignition cycle count maximum has been reached.

### Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

### Conditions for Setting the DTC

• | The PPS has a current fault.

• | The PPS fault counter in the SDM has reached 127 counts.

### Action Taken When the DTC Sets

• | The SDM disables the instrument panel (I/P) module deployment loop.

• | The SDM commands the AIR BAG indicator ON via class 2 serial data.

• | The SDM will lock out the malfunctioning PPS.

### Conditions for Clearing the DTC

• | The PPS has been replaced.

• | The SDM has been replaced.

### Diagnostic Aids

Important: DTC B0092 or DTC B0098 will set if the PPS has a malfunction, and has set any one of the following DTCs 023, 024, 063, 064, or 065. When DTC B0092 or DTC B0098 is present, it is important to check the PPS for any current DTC. Refer to Passenger Presence System Flash Code Procedures . If the PPS has any current DTC, address those DTC before performing this diagnostic procedure.

Any repair performed on the original PPS will not clear DTC B1530.

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

SIR Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

### Circuit/System Testing

Important: If the SDM has DTC B0092 or DTC B0098 stored as current, you must address those DTCs before continuing with this diagnostic procedure.

1. With a scan tool, check for DTC B0092 or DTC B0098 is a current DTC.

⇒ | Diagnose DTC B0092 or DTC B0098 if set as a current DTC.

2. If the PPS has been replaced then DTC B1530 will automatically be cleared. If the PPS was repaired and DTC B1530 is set as current, the SDM will have to be replaced.

⇒ | 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