Air Bag Indicator Circuit Malfunction (Passenger)

Air Bag Indicator Circuit Malfunction (Passenger)

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 presence system (PPS) sensor continually monitors itself and uses the passenger presence module/passenger presence sensor in order to turn the passenger air bag indicator on/off in the radio/hvac control. When someone is sitting in the passenger seat the passenger presence module/passenger presence sensor communicates with the radio/hvac control to turn the passenger air bag indicator on. If no one is sitting in the passenger seat the radio/hvac control also receives a message to illuminate the passenger air bag 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 SIR System
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 Control Module References for scan tool information.

Circuit/System Testing

1. With a scan tool, monitor the passenger classification in the PPS data list. With no one sitting in the passenger seat the scan tool should display Empty. While monitoring the passenger classification have someone sit in the passenger seat. The status should change indicate someone is sitting in the passenger seat.

• If the passenger classification does not change states, replace the passenger presence module.

2. If passenger clarification does change states, replace the radio/hvac control. Refer to Radio, Video, Audio Disc Player, and Navigation Information Display Replacement Radio, Video, Audio Disc Player, and Navigation Information Display Replacement.

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 Control Module References for passenger presence system replacement, setup, and programming