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 AIR BAG ON/OFF indicators are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the passenger presence module will commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The passenger presence 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 passenger presence module will turn the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the PPS. If a malfunction is detected, the passenger presence module will store a DTC, default the PPS to the OFF state, and communicate with the inflatable restraint sensing and diagnostic module (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 malfunction.
Reference Information
Schematic Reference
SIR Schematics [1][2]Air Bag Systems
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation
SIR 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
* SIR/SRS Wiring Repairs SIR/SRS Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
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.
* Passenger presence module
* Passenger presence module wiring harness
* IPC
* IPC wiring harness
* SDM
* SDM wiring harness
1. Ignition OFF, disconnect the harness connector at the inflatable restraint passenger air bag On/Off indicator.
2. Ignition OFF, test for less then 1 ohm between the ground circuit terminal 2 and ground.
• If greater then the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify 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 circuit fuse is open, test or replace the inflatable restraint passenger air bag On/Off indicator.
4. Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
• If the test lamp is always on, test the control circuit for a short to ground. If all circuits test normal replace the IPC.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the IPC.
5. Connect a test lamp between the control circuit terminal 1 and the ignition circuit terminal 4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
• If the test lamp is always on, test the control circuit for a short to ground. If all circuits test normal replace the IPC.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the IPC.
6. If all circuits test normal, replace the inflatable restraint passenger air bag on/off indicator.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Inflatable Restraint Instrument Panel Module Indicator Replacement Service and Repair
* Control Module References Control Module References for IPC and SDM replacement, setup, and programming