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.

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Inflatable Restraint Instrument Panel Module Indicator Ignition | 2, 4, 5, 6 | 2, 4, 5, 6 | -- | --
Passenger Air Bag ON Indicator Control | 1 | 2 | 2 | --
Passenger Air Bag Off Indicator Control | 3 | 4 | 4 | --
Inflatable Restraint Instrument Panel Module Indicator Ground | -- | 2, 4, 5, 6 | 2, 4, 5, 6 | --
1. Air Bag Indicator Always ON 2. Air Bag ON Indicator Always OFF 3. Air Bag OFF Indicator Always ON 4. Air Bag OFF Indicator Always OFF 5. Passenger Air Bag Indicator Always OFF

6. Passenger Seat Belt Indicator Always OFF

### 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 illuminates both PASSENGER AIR BAG ON/OFF indicators for 5 seconds; then the PPS module conducts tests on the PPS components and circuits while both PASSENGER AIR BAG ON/OFF indicators are illuminated. If no malfunctions are detected, the PPS module will illuminate either the ON or OFF indicator of the PASSENGER AIR BAG indicator, 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 illuminate the AIR BAG indicator 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

Component 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

Control Module References for scan tool information

### 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 component/connector.

• | Passenger AIR BAG ON/OFF indicator

• | PPS module

• | Passenger AIR BAG ON/OFF indicator wiring harness connector

• | PPS wiring harness connector

1. Ignition OFF, disconnect the harness connector at the inflatable restraint passenger air bag on/off indicator.
2. Test for less than 1 ohm between the ground circuit terminal 2 and ground.

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that 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 fuse is open, test or replace the inflatable restraint passenger air bag on/off indicator.

4. With the right front passenger seat occupied, verify that a test lamp illuminates between the control circuit terminal 1 and B+.

⇒ | If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PPS module.

5. With the right front passenger seat vacant, verify that a test lamp does not illuminate between the control circuit terminal 1 and B+.

⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the PPS module.

6. With the right front passenger seat vacant, verify that a test lamp illuminates between the control circuit terminal 3 and B+.

⇒ | If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PPS module.

7. With the right front passenger seat occupied, verify that a test lamp does not illuminate between the control circuit terminal 3 and B+.

⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the PPS module.

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

### Component Testing

1. Ignition OFF, disconnect the harness connector at the inflatable restraint passenger air bag on/off indicator.
2. Install a 2-amp fused jumper wire between the ignition terminal 4 and 12 volts. Momentarily install a jumper wire between the control terminal 1 and ground. Verify the ON indicator illuminates.

⇒ | If the ON indicator does not illuminate, replace the inflatable restraint instrument panel module indicator.

3. Install a 2-amp fused jumper wire between the ignition terminal 4 and 12 volts. Momentarily install a jumper wire between the control terminal 3 and ground. Verify the OFF indicator illuminates.

⇒ | If the OFF indicator does not illuminate, replace inflatable restraint instrument panel module 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