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 instrument panel cluster (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)
Description and Operation

Seat Belt System Description and Operation (Description and Operation)
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 (Programming and Relearning) for scan tool information.

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 component/connector.

* The seat belt switch - right
* The SDM module
* The seat belt switch - right wiring harness connector
* The SDM wiring harness connector

1. Observe the Passenger Air Bag ON/OFF status indicator. 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 illuminate.

• 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 scan tool and Passenger Air Bag ON/OFF indicator, which contains the passenger seat belt indicator. Monitor the scan tool and 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, remove the SDM connector and the passenger/right seat belt buckle connector. Refer to SDM replacement in Repair Instructions for connector location.
• Test and repair both the passenger seat belt switch signal and ground circuits for an open, high resistance.

3. If all circuits test normal then replace the passenger seat belt buckle.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Driver or Passenger Seat Belt Replacement (Driver or Passenger Seat Belt Replacement)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming