DTC 1049

DTC 1049-1050

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides and overview of each diagnostic category.



DTC Descriptors
DTC 1049
- PPS System Fault Supply Voltage Low

DTC 1050
- PPS System Fault Supply Voltage High




Circuit/System Description

The passenger presence system (PPS) is used to monitor the pressure profile of any occupant that is sitting in the front outboard passenger seat and communicates the profile classification to the sensing and diagnostic module (SDM). The SDM will either enable or suppress the deployment of the instrument panel (I/P) module based on the profile classification of the occupant.


Conditions for Running the DTC

Ignition voltage is between 9-16 volts.


Conditions for Setting the DTC

The PPS module has detected supply battery voltage too low or too high.


Action Taken When the DTC Sets

* The PPS module will set DTC 1051 and communicate it to the SDM.
* The SDM will set DTC B0081 commands the AIR BAG indicator ON.
* The SDM will disable the I/P module deployment loop.
* The PPS module will command ON the passenger air bag status OFF indicator.



Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
* A history DTC will clear once 255 malfunction-free ignition cycles have occurred.



Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

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

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

Scan Tool Reference

Control Module References (Programming and Relearning)


Circuit/System Verification

With the passenger seat occupied and unoccupied the inflatable restraint passenger air bag on/off indicator should switch states within 5 seconds.


Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.


* PPS module

* PPS module wiring harness




1. Verify DTC 1050 is not set.

• If DTC 1050 is set as current, refer to Charging System Test (Solstice) (Charging System Test)Charging System Test (SKY) (Charging System Test) .

2. Ignition OFF, disconnect the harness connector at the PPS module.
3. Ignition OFF, test for less then 5 ohm of resistance between the ground circuit terminal D and ground.

• If greater then the specified range, test the ground circuit for an open/high resistance.

4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal A and ground.

• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

5. If all circuits test normal, replace the PPS module.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning)for PPS module replacement, setup, and programming