Buick Regal: Airbag Indicator Malfunction (Passenger)
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
1. Both indicators always OFF
2. The OFF indicator will not illuminate
3. The ON indicator will not illuminate
4. The OFF indictor always ON
5. The ON indicator always ON
* High resistance may cause the appropriate indicator to illuminate less bright
than normal
Circuit/System Description
The passenger air bag ON/OFF indicators are used to notify the driver when
the passenger presence system has
enabled or disabled the passenger instrument panel air bag. When the ignition is
turned ON, the ignition voltage
is supplied to the passenger presence module. When the Inflatable Restraint
Sensing and Diagnostic Module
receives the appropriate serial data message from the passenger presence module
the Inflatable Restraint Sensing
and Diagnostic Module will then provide voltage to the appropriate indicator.
Reference Information
Schematic Reference
SIR Wiring Schematics
Connector End View Reference
Component Connector End View Index
Description and Operation
Supplemental Inflatable Restraint System Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Refer to Control Module References for scan tool information.
Circuit/System Verification
1. Ignition ON.
2. Verify no other Inflatable Restraint Sensing and Diagnostic Module DTCs are
set.
- If other Inflatable Restraint Sensing and Diagnostic Module DTCs are
set
Diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List -
Vehicle
- Go to next step: If no other Inflatable Restraint Sensing and
Diagnostic Module DTCs are set
3. Verify the passenger air bag ON indicator and passenger air bag OFF
indicators turn ON and OFF when
commanded ON and OFF with a scan tool.
- If the passenger air bag indicators do not change
Refer to Circuit/System Testing
- Go to next step: If the passenger air bag indicators change
4. All OK.
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.
- Passenger air bag disable on/off indicator.
- Passenger air bag disable on/off indicator wiring harness.
1. Ignition OFF, disconnect the harness connector at the S48C Multifunction
Switch 1 - Instrument Panel.
2. Test for less than 10 Ω between the ground circuit terminal 1 and ground.
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground
connection.
- Go to next step: If less than 10 Ω
3. Ignition ON, command the Passenger Air Bag Off Indictor OFF with a scan
tool.
4. Verify a test lamp does not illuminate between the control circuit terminal 2
and ground.
- If the test lamp illuminates
- Ignition OFF, disconnect the X1 harness connector at the K36 Inflatable
Restraint Sensing and
Diagnostic Module. Ignition ON.
- Test for less than 1 V between the control circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K36 Inflatable Restraint Sensing and
Diagnostic Module.
- Go to next step: If the test lamp does not illuminate
5. Command the Passenger Air Bag Off indicator ON with a scan tool.
6. Verify a test lamp illuminates between the control circuit terminal 2 and
ground.
- If the test lamp does not illuminate
- Ignition OFF, disconnect the X1 harness connector at the K36 Inflatable
Restraint Sensing and
Diagnostic Module.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- Test for less than 2 Ω in each control circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K36 Inflatable Restraint Sensing and
Diagnostic Module.
- Go to next step: If the test lamp illuminates
7. Command the Passenger Air Bag On Indicator OFF with a scan tool.
8. Verify a test lamp does not illuminate between the control circuit terminal 3
and ground.
- If the test lamp illuminates
- Ignition OFF, disconnect the X1 harness connector at the K36 Inflatable
Restraint Sensing and
Diagnostic Module. Ignition ON.
- Test for less than 1 V between the control circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K36 Inflatable Restraint Sensing and
Diagnostic Module.
- Go to next step: If the test lamp does not illuminate
9. Command the Passenger Air Bag On Indicator ON with a scan tool.
10. Verify a test lamp illuminates between the control circuit terminal 3 and
ground.
- If the test lamp does not illuminate
- Ignition OFF, disconnect the X1 harness connector at the K36 Inflatable
Restraint Sensing and
Diagnostic Module.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- Test for less than 2 Ω in each control circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K36 Inflatable Restraint Sensing and
Diagnostic Module.
- Go to next step: If the test lamp illuminates
11. Test or replace the S48C Multifunction Switch 1 - Instrument Panel.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Refer to Instrument Panel Assembly Replacement for S48C Multifunction
Switch 1 - Instrument Panel
replacement
- Refer to Control Module References for Inflatable Restraint Sensing and
Diagnostic Module
replacement, programming and setup
READ NEXT:
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.
Diag
WARNING: If a service procedure indicates that a module is to be
replaced, a new
production unit MUST be ordered from the GM Parts Catalog or certified
supplier. Using a module that has been reset by
SEE MORE:
The vehicle has an engine coolant
temperature gauge and an engine
coolant temperature warning light on
the instrument cluster to warn of
engine overheating.
If it is decided not to lift the hood
when this warning appears, but
instead get service help right away.
If it is decided to lift the hood, ma
Warning:
Never leave a child, a helpless
adult, or a pet alone in a vehicle,
especially with the windows
closed in warm or hot weather.
They can be overcome by the
extreme heat and suffer
permanent injuries or even death
from heat stroke.
The vehicle aerodynamics are
designed to improve fuel econo