For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | 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

#### Connector End View Reference

SIR Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

### 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. Ignition OFF, disconnect the PPS module connector located under the passenger seat.
2. Disconnect the Passenger AIR BAG ON/OFF Indicator connector.
3. Test the Passenger AIR BAG ON/OFF indicator ignition 1 voltage circuit for a short to ground, a high resistance, or an open. Verify that a short to ground, a high resistance, or an open does not exist.

⇒ | If any of the above conditions are found make the appropriate repair.

4. Test both ON and OFF indicator control circuits between the Passenger AIR BAG ON/OFF indicator and the PPS for a short to voltage, high resistance, or an open. Verify that a short to voltage, a high resistance, or an open does not exist.

⇒ | If any of the above conditions are found make the appropriate repair.

5. Reconnect the PPS connector then turn the ignition ON, engine OFF. Then connect a test lamp between the ignition 1 voltage circuit and Passenger Air Bag OFF indicator control circuit on the Passenger AIR BAG ON/OFF indicator connector. With the passenger front seat empty verify the test lamp illuminate.

⇒ | If test lamp does not illuminate replace the PPS.

⇒ | If test lamp illuminate replace the Passenger AIR BAG ON/OFF Indicator .

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Inflatable Restraint Instrument Panel Module Indicator Replacement

• | SIR/SRS Wiring Repairs

• | Control Module References for PPS replacement, setup, and programming