Seat Belt Indicator Circuit Malfunction - Passenger
Seat Belt 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 inflatable restraint sensing and diagnostic module (SDM) sends the status of the passenger seat belt switch to the Passenger Air Bag ON/OFF indicator via a serial data communication message. The instrument panel cluster (IPC) controls the passenger seat belt indicator by using the serial data communication message from the SDM. If the seat belt is unfastened, only if an occupant is seated in the front passenger seat, the SDM will send a message to the IPC to illuminate the fasten safety belt indicator for 72 seconds or until the seat belt is fastened.
Reference Information
Schematic Reference
Seat Belt Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector End Views By Name
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 Verification
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 seat belt switch
* SDM
* Passenger seat belt switch wiring harness connector
* SDM wiring harness connector
1. Observe the Passenger Air Bag ON/OFF status indicator located in the multifunction switch on the instrument panel (I/P). Turn ON the ignition, both ON and OFF indicators will turn ON for 5 seconds. Verify that the Passenger Air Bag ON/OFF status indicator illuminates.
• If the Passenger Air Bag ON/OFF status indicator does not illuminate, refer to Air Bag Indicator Circuit Malfunction (Driver) Air Bag Indicator Circuit Malfunction (Driver)Air Bag Indicator Circuit Malfunction (Passenger) Air Bag Indicator Circuit Malfunction (Passenger).
2. Sit in the front passenger seat with the ignition ON and observe the Passenger Air Bag ON/OFF indicator, which contains the passenger seat belt indicator. Monitor the passenger seat belt indicator while buckling and unbuckling the passenger seat belt. The passenger seat belt indicator should turn OFF and ON when the passenger seat belt is unbuckled and buckled. Verify that the passenger seat belt indicator turns ON and OFF.
• If the indicator does perform as described, turn OFF the ignition, then remove the SDM connector and the passenger seat belt buckle connector. Refer to SDM replacement in Repair Instructions for connector location.
• Test and repair both passenger seat belt switch signal and ground circuit for an open, high resistance. If both circuits test normal then replace the passenger seat belt switch.
3. Ignition OFF, remove the IPC connector and the Passenger Air Bag ON/OFF connector. Refer to Accessory Switch Replacement Service and Repair. Test the Passenger Seat Belt Indicator Control circuit between the IPC and the passenger Air Bag ON/OFF connector for an open or high resistance. Verify that an open or high resistance does not exist.
• If any of the above conditions are found, make the appropriate repair.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Front Seat Belt Buckle Replacement Front Seat Belt Buckle Replacement
* Accessory Switch Replacement Service and Repair
* Control Module References Control Module References for SDM, BCM or IPC replacement, setup, and programming