Circuit/System Testing

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

The PPS module
The SDM module
The PPS wiring harness connector
The SDM wiring harness connector

Ignition ON, the PPS should turn ON the PPS ON/OFF indicators. Verify the PPS illuminates the PPS ON/OFF indicators.
- If the Passenger Air Bag ON/OFF status indicator does not illuminate refer to Passenger Presence System Indicator Circuit Malfunction .
Ignition ON, use the scan tool. Go to the PPS menu, then retrieve the DTCs. Refer to Passenger Presence System Flash Code Procedures . Verify no PPS DTCs are set.
- If the PPS has any current or history DTCs stored, you must address the PPS DTCs first. Refer to the Diagnostic Trouble Code (DTC) List - Vehicle .
Ignition OFF, disconnect the PPS module connector. Note: Refer to Inflatable Restraint Passenger Presence System Replacement - Front in Repair Instructions for connector location.
Remove the SDM connector, refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in Repair Instructions for connector location.
Test the occupant sensor serial data circuit for an open, short to ground or high resistance between the PPS and SDM connector. Verify no open, short to ground or high resistance exists.
- If any of the above conditions are found make the appropriate repair.
Test the PPS ignition 1 voltage and ground circuits for a short to ground, a short to voltage, a high resistance or an open. Verify no short to ground, a short to voltage, a high resistance or an open exists.
- If any of the above conditions are found make the appropriate repair.
If all circuits test normal then replace the PPS.