B1530

DTC B1530

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (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 (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 ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Component Connector End Views)
Description and Operation

SIR System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)



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 (B0092) or DTC B0098 (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 (Verification Tests) after completing the diagnostic procedure.

* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Control Module References (Programming and Relearning)for SDM replacement, setup, and programming