Passenger Presence System Indicator Circuit Malfunction

Passenger Presence System Indicator Circuit Malfunction

Diagnostic Instructions
^ Perform the [Diagnostic System Check - Vehicle Diagnostic Information] prior to using this diagnostic procedure.
^ Review [Strategy Based Diagnosis] for an overview of the diagnostic approach. Strategy Based Diagnosis
^ [Diagnostic Procedure Instructions - Vehicle Diagnostic Information] provides an overview of each diagnostic category. Diagnostic Procedure Instructions - Vehicle Diagnostic Information

Circuit/System Description
The PASSENGER AIR BAG ON/OFF indicators, located in the center of instrument panel cluster (IPC), are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the I/P inflator module. When the ignition is turned ON, the PPS module is supplied with voltage and commands the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The PPS module conducts tests on the PPS components and circuits while the 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 IPC to turn the AIR BAG indicator ON to notify the driver of a PPS malfunction.

Reference Information

Schematic Reference
[SIR Schematics]

Connector End View Reference
[SIR Connector End Views]

Description and Operation
[SIR System Description and Operation]

Electrical Information Reference
^ [Circuit Testing]
^ [Connector Repairs]
^ [Testing for Intermittent Conditions and Poor Connections]
^ [Wiring Repairs]

Scan Tool Reference
^ [Scan Tool Data List - SIR]
^ [Scan Tool Data Definitions - SIR]

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

NOTE: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
^ Inflatable restraint passenger air bag on/off indicator.
^ Inflatable restraint passenger air bag on/off indicator wiring harness.

1. Ignition OFF, disconnect the harness connector at the inflatable restraint passenger air bag on/off indicator.
2. Ignition OFF, test for less then 1 ohm of resistance between the ground circuit terminal 2 and ground.
^ If greater then the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground.
^ If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the inflatable restraint passenger air bag on/off indicator.

4. Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 4.
5. With the passenger seat occupied and unoccupied test lamp should switch states within 5 seconds.
^ If the test lamp is always on, test the control circuit for a short to ground. If all circuits test normal replace the PPS module.
^ If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the PPS module.

6. Connect a test lamp between the control circuit terminal 1 and the ignition circuit terminal 4.
7. With the passenger seat occupied and unoccupied test lamp should switch states within 5 seconds.
^ If the test lamp is always on, test the control circuit for a short to ground. If all circuits test normal replace the PPS module.
^ If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the PPS module.

8. If all circuits test normal, replace the inflatable restraint passenger air bag on/off indicator.

Repair Instructions
Perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure.
^ [Inflatable Restraint Sensing and Diagnostic Module Replacement]
^ [Inflatable Restraint Passenger Presence System Replacement - Front] for PPS module replacement, setup, and programming