Passenger Presence System Indicator Circuit Malfunction
Passenger Presence System Indicator Circuit Malfunction
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.
Circuit/System Description
The PASSENGER AIR BAG ON/OFF indicators are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the instrument panel (I/P) inflator module. When the ignition is turned ON, the PPS module is supplied with voltage and commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds; then the PPS module conducts tests on the PPS components and circuits while both PASSENGER AIR BAG ON/OFF indicators are ON. If no malfunctions are detected, the PPS module will turn the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the PPS. If a malfunction is detected, the PPS module will store a diagnostic trouble code (DTC), default the PPS to the OFF state, and communicate with the SDM that a DTC has been set. The SDM will request the instrument panel cluster (IPC) to turn the AIR BAG indicator ON to notify the driver of a PPS malfunction.
Diagnostic Aids
A history DTC maybe caused by an intermittent short or open in the ignition 1 circuit for the passenger AIR BAG ON/OFF indicator.
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 (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for Scan Tool Information
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 component/connector.
* The Passenger AIR BAG ON/OFF indicator
* The PPS module
* The Passenger AIR BAG ON/OFF indicator wiring harness connector
* The PPS wiring harness connector
1. Perform PPS rezeroing procedure.
2. Ignition ON, with a scan tool check for DTCs.
• If DTC B1797 is current, refer to DTC B1797.
3. Perform PPS sensitivity check as described in PPS rezeroing procedure.
4. Ignition ON, with a scan tool, observe the passenger seat belt status as the belt is buckled and unbuckled.
• If passenger seat belt status does not change, replace passenger seat belt buckle.
5. Fasten the passenger seat belt.
6. Ignition ON, with a scan tool, observe that the filtered pressure sensor output is 39-64.
• If filtered pressure sensor is not as indicated, replace passenger seat belt retractor.
• If filtered pressure sensor is as indicated, replace the PPS seat sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Control Module References (Programming and Relearning) for PPS replacement, setup, and programming