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Supplemental Inflatable Restraint System Chevrolet Corvette C6

Airbag 10 illustrations ~20311 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Inflatable Restraint Front End Sensor9 N.m80 lb in
Inflatable Restraint I/P Module Fasteners10 N.m89 lb in
Inflatable Restraint Sensing and Diagnostic Module Fasteners10 N.m89 lb in
Inflatable Restraint Side Impact Sensor9 N.m80 lb in
Seat Belt Buckle Pretentioner42 N.m31 lb ft

Scheme 1

Scheme 1: SIR Schematics
Scheme 1: SIR Schematics

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
Scheme 3

SIR Identification Views

The SIR Identification Views shown below illustrate the approximate location of all SIR components available for the vehicle. This will assist in determining the appropriate SIR Disabling and Enabling for a given service procedure, refer to SIR Disabling and Enabling .

Scheme 4

Scheme 4: SIR Identification Views
Scheme 4: SIR Identification Views
CalloutComponent Name
1Right Front End Sensor-Located on the front of the vehicle in the engine compartment
2Front Hood Assist Rod-A gas shock located under the front hood on the passenger side
3Vehicle Battery-Located under the hood on the right side (LS2), in the trunk on the right side (LS7)
4Instrument Panel (I/P) Air Bag-Located at the top right under the I/P
5Sensing and Diagnostic Module (SDM)-Located underneath the vehicle center console in front of shifter
6Passenger Presence System (PPS)-Located in the passenger seat under the seat trim
7Seat Belt Pretensioner-Located on the inboard side of the passenger seat
8Side Impact Sensor (SIS)-Located inside passenger/right door near rear of door
9RF Side Impact Air Bag-Located on the seat back of passenger seat
10Rear Compartment Lid Assist Rod-A gas shock is located under the rear trunk lid on the passenger side
11Rear Compartment Lid Assist Rod-A gas shock is located under the rear trunk lid on the driver side
12Side Impact Sensor (SIS)-Located inside driver/left door near rear of door
13LF Side Impact Air Bag-Located on the seat back of driver seat
14Seat Belt Pretensioner-Located on the inboard side of the driver seat
15Steering Wheel Air Bag-Located on the steering wheel
16Front Hood Assist Rod-A gas shock located under the front hood on the driver side
17Left Front End Sensor-Located on the front of the vehicle in the engine compartment

DIAGNOSTIC CODE INDEX

DTCDescription
DTC B0012-B0019, B0027-B0030, B0039-B0041, B0045, B0046, B0056-B0076, B0085-B0089, B0106-B0114, B0118-B0124, or B3850-B3854B0012: Passenger Frontal Deployment Loop (Stage 2) Resistance Low B0013: Passenger Frontal Deployment Loop (Stage 2) Open B0014: Passenger Frontal Deployment Loop (Stage 2) Voltage Out of Range B0016: Passenger Frontal Deployment Loop (Stage 1) Resistance Low B0017: Passenger Frontal Deployment Loop (Stage 1) Open B0018: Passenger Frontal Deployment Loop (Stage 1) Voltage Out of Range B0028: Passenger Front Side Deployment Loop Resistance Low B0029: Passenger Front Side Deployment Loop Open B0030: Passenger Front Side Deployment Loop Voltage Out of Range B0040: Driver Front Side Deployment Loop Resistance Low B0041: Driver Front Side Deployment Loop Open B0045: Driver Front Side Deployment Loop Voltage Out of Range B0057: Passenger Front Pretensioner Deployment Loop Resistance Low B0058: Passenger Front Pretensioner Deployment Loop Open B0059: Passenger Front Pretensioner Deployment Loop Voltage Out of Range B0064: Driver Front Pretensioner Deployment Loop Resistance Low B0065: Driver Front Pretensioner Deployment Loop Open B0066: Driver Front Pretensioner Deployment Loop Voltage Out of Range
DTC B0022, B0024, B0026, B0042, B0043, or B0044B0022: Driver Frontal Deployment Loop (Stage 1) Resistance Low B0024: Driver Frontal Deployment Loop (Stage 1) Voltage Out of Range B0026: Driver Frontal Deployment Loop (Stage 1) Open B0042: Driver Frontal Deployment Loop (Stage 2) Resistance Low B0043: Driver Frontal Deployment Loop (Stage 2) Voltage Out of Range B0044: Driver Frontal Deployment Loop (Stage 2) Open
DTC B0051B0051: Deployment Commanded
DTC B0053B0053: Deployment Commanded with Loop DTCs Present
DTC B0077, B0078, B0079, B0080, B0081, or B0082B0077: Driver Side Impact Sensor (SIS) Performance B0078: Passenger Side Impact Sensor (SIS) Performance B0079: Incorrect Driver Side Impact Sensor (SIS) Installed B0080: Discard Driver Side Impact Sensor (SIS) B0081: Incorrect Passenger Side Impact Sensor (SIS) Installed B0082: Discard Passenger Side Impact Sensor (SIS)
DTC B0083 or B0084B0083: Right Front Seat Position Sensor Circuit B0084: Left Front Seat Position Sensor Circuit
DTC B0092B0092: Passenger Presence System Performance
DTC B0098B0098: Passenger Presence System Configuration Error
DTC B0100, B0101, B0102, B0103, B0104, or B0105B0100: Electronic Front End Sensor 1 Performance B0101: Discard Electronic Front End Sensor 1 B0102: Incorrect Electronic Front End Sensor 1 Installed B0103: Electronic Front End Sensor 2 Performance B0104: Discard Electronic Front End Sensor 2 B0105: Incorrect Electronic Front End Sensor 2 Installed
DTC B1001B1001: SDM Option Configuration Error

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - SIR

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Vehicle System Check will provide the following information

  1. The identification of the control module(s) which commands the system
  2. The ability of the control module(s) to communicate through the serial data circuit
  3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of Vehicle System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Introduction

When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. When the SDM has completed the power-up mode the SDM will establish communication with the passenger presence system (PPS). The PPS will respond by performing diagnostic tests to check for proper circuit continuity and for shorts to ground and voltage within the PPS. If the PPS detects a malfunction, the PPS will set a DTC, then communicate through a non class 2 or GMLAN communications circuit to the SDM that a malfunction has occurred, while turning the passenger air bag status indicator to OFF. The SDM will respond by disabling the instrument panel (I/P) module deployment loop, setting DTC B0092 or B0098 and commanding the AIR BAG indicator ON. The SDM notify the driver of a PPS or SIR malfunction by turning ON the AIR BAG indicator on the cluster. The DTCs that the PPS set are non class 2 or GMLAN and have to be flashed through the PASSENGER AIR BAG ON/OFF indicators located in the rearview mirror. The procedures below are designed to assist in the flashing of these codes. Before you start, read these procedures carefully and completely. For further information regarding the PPS refer to SIR System Description and Operation .

Passenger Presence System (PPS) Flash Code Procedure

IMPORTANTWhen flashing PPS codes, the instrument panel cluster (IPC) and dash lights will begin dimming on and off. This is normal operation during the flashing procedure and does not indicate additional system faults.
IMPORTANTIf after 30 seconds of a successful request to flash codes and no additional flashes are observed, then the PPS does not have any stored codes.
  1. Empty the front outboard passenger seat.
  2. Install a scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, request the PPS to flash DTCs.
  5. When the PPS receives a valid request to flash DTCs, the PPS will perform the following: Illuminate both PASSENGER AIR BAG ON and OFF indicators for 1 second. Turn OFF both PASSENGER AIR BAG ON and OFF indicators for 1 second. Flash the first number of the DTC using the OFF indicator. Count the number of times the OFF indicator flashes to obtain the first number of the DTC. Flash the second number of the DTC using the ON indicator. Count the number of times the ON indicator flashes to obtain the second number of the DTC. When the flashing procedure is initiated, to determine if a code is current or history, the PPS will flash current DTCs two times consecutively and flash history DTCs once.
  6. If the flashing procedure was unsuccessful repeat this procedure. Due to the communication status between the SDM and the PPS module, this procedure may have to be repeated until a successful flashing attempt has been achieved.
  7. Refer to the «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) , to diagnose the DTCs you have obtained.

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
5-Volt Reference023023023
Seat Belt Tension Sensor Signal023023023
Low Reference023

Circuit/System Description

The inflatable restraint seat belt tension sensor is a 3-wire potentiometer mounted on the retractor or buckle side of the seat belt and provides an input to the passenger presence system (PPS). When an infant car seat is properly restrained on the front passenger seat, the seat belt is tightly secured through the car seat. The seat belt pulls on the tension sensor and changes the voltage signal to the PPS module. The PPS monitors the seat belt tension sensor circuit and if a fault is detected, DTC 023 will be set. When the PPS detects this DTC, it will notify the customer by illuminating either the ON or OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. Then the PPS will communicate to the sensing and diagnostic module (SDM) through a non-class 2 communications circuit that a PPS fault is present. The SDM will then set DTC B0092 indicating a problem within the PPS and will suppress the deployment of the instrument panel (I/P) module and then request the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

  1. The PPS detects the voltage at the passenger seat belt tension retractor sensor signal is less than 0.5 volt or greater than 4.5 volts for 500 milliseconds.
  2. The PPS detects the voltage at the passenger seat belt tension retractor sensor 5-volt reference is less than 4.5 volts or greater than 9.1 volts for 500 milliseconds.
  3. The PPS detects the amperage at the passenger seat belt tension retractor sensor low reference is 25 ma or greater for 500 milliseconds.

Action Taken When the DTC Sets

  1. The PPS will set a DTC, and then communicate with the SDM.
  2. The SDM will set DTC B0092.
  3. The SDM disables the I/P module deployment loop.
  4. The PPS will illuminate the PASSENGER AIRBAG status OFF indicator.
  5. The SDM requests the IPC to illuminate the AIR BAG indicator.

Conditions for Clearing the DTC

  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Diagnostic Aids

Inspect the passenger seat belt tension retractor sensor signal, 5-volt reference, and low reference circuits carefully for cutting and/or chafing.

Reference Information

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

IMPORTANTThe seat belt tension retractor sensor is not service separately. The Seat Belt Retractor Replacement - Right Front with the seat belt tension retractor sensor must be serviced as a complete unit. When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector: Seat belt retractor pretensioner - RF PPS module SDM module Seat belt retractor pretensioner - RF wiring harness connector PPS wiring harness connector SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the inflatable restraint passenger seat belt tension sensor.
  2. Ignition ON, test for 4.5-5.5 volts between the voltage reference circuit terminal A and ground. If less that the specified range, test the voltage reference circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the PPS module. If greater that the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the PPS module.
  3. Ignition OFF, remove the SDM/AOS SWITCH AIR BAG fuse. Test for less than 2 ohms between low reference terminal B and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PPS module.
  4. Ignition OFF, disconnect the harness connector at the PPS module.
  5. Test for infinite resistance between the signal circuit terminal C and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. Ignition ON, test for less than 1 volt between the signal circuit terminal C and ground. If greater than the specified range, test the signal circuit for a short to voltage.
  7. Test for less than 1 ohm between the signal circuit terminal C at the sensor harness connector and terminal 4 at the PPS module harness connector. If greater than the specified range, test the signal circuit for an open/high resistance.
  8. If all circuits test normal, replace the seat belt tension sensor.
  9. Reconnect all PPS components. Clear all PPS DTCs. Refer to «Passenger Presence System Flash Code Procedures»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . Rezero the PPS, refer to «Passenger Presence System Rezeroing»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . Verify DTC 023 does not exist. If DTC 023 is set, replaced the PPS.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Retractor Replacement - Right Front (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/restraints-control-systems/#seat-belt-system) or «Seat Belt Retractor Replacement - Right Front (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint passenger presence system (PPS) is used to monitor the weight of an occupant on the front outboard passenger seat and communicate the status to the sensing and diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel (I/P) module. The PPS consist of an electronic control module, silicone filled sensor pad, pressure sensor, seat belt tension retractor sensor, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the pressure sensor. The pressure sensor sends a voltage signal to the PPS module. If the pressure from the occupant's weight is less than a specified value, the PPS module will send a suppress signal to the SDM to disable the I/P module. If the pressure from the occupants weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P module. The PPS module will notify the customer of the enable/disable status by illuminating one of the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The PPS monitors itself for faults and will set flash DTCs if a fault is detected. The PPS will also notify the SDM of a fault. The SDM will respond by setting either DTC B0092 or B0098 and requesting the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 volts.

The PPS detects ignition 1 voltage is less than 8 volts for 500 milliseconds.

  1. The SDM disables the instrument panel (I/P) module deployment loop.
  2. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the PPS module.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 9 and ground. If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance.
  4. Reconnect all components, clear codes and recheck for DTC 024. Refer to «Passenger Presence System Flash Code Procedures»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . If DTC 032 resets, replace the PPS.
  5. If all circuits test normal, test or replace the PPS module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger presence system (PPS) is used to monitor the weight of an occupant in the front passenger seat. The PPS is calibrated at the seat assembly plant and cannot be recalibrated at a service center and must be replaced. The PPS continuously monitors itself and if the system becomes out of calibration, DTC 063 will be set. When the PPS detects this DTC within the PPS, it will notify the customer of the enable/disable status by illuminating the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. Then the PPS will communicate to the sensing and diagnostic module (SDM) through a non-class 2 communications circuit that a PPS fault is present. The SDM will then set DTC B0092 indicating a problem within the PPS and will suppress the deployment of the instrument panel (I/P) module and then illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 volts.

  1. The PPS will set a DTC, and then communicate with the SDM.
  2. The SDM will set DTC B0092.
  3. The SDM disables the I/P module deployment loop.
  4. The PPS will illuminate the passenger air bag status OFF indicator.
  5. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

DTC 063 is an indication that the PPS is out of calibration. You cannot recalibrate the PPS. Replace the PPS after following the instructions in the Circuit/System Testing.

The presence of current or history DTCs while attempting to rezero the PPS will cause the PPS module to set DTC 063. Verify that all SIR and PPS DTCs have been cleared before rezeroing the PPS.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information

With a scan tool, verify DTC 063 is not set.

  1. If DTC is set, Rezero the PPS, refer to «Passenger Presence System Rezeroing»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . If DTC resets, replace the PPS.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PPS replacement, setup, and programming

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The Inflatable Restraint Passenger Presence System (PPS) is used to monitor the weight of an occupant on the front outboard passenger seat and communicate the status to the sensing and diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel (I/P) module. The PPS consist of an electronic control module, silicone filled sensor pad, pressure sensor, seat belt tension retractor sensor, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the pressure sensor. The pressure sensor sends a voltage signal to the PPS module. If the pressure from the occupant's weight is less than a specified value, the PPS module will send a suppress signal to the SDM to disable the I/P module. If the pressure from the occupant's weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P module. The PPS module will notify the customer of the enable/disable status by illuminating one of the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The PPS monitors itself for faults and will set flash DTC if a fault is detected. The PPS will also notify the SDM of a fault. The SDM will respond by setting either DTC B0092 or B0098 and requesting the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 volts.

  1. The PPS has lost communications with the SDM.
  2. The PPS verification ID does not match the ID that is stored in the SDM.
  1. The SDM disables the instrument panel (I/P) module deployment loop.
  2. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
IMPORTANTDTC B0098 is an indication that the SDM has received an incorrect PPS verification ID. The SDM will continue to request the verification ID from the PPS for 5 seconds. If the SDM does not receive the correct verification ID from the PPS within 5 seconds, the SDM will set DTC B0098 as current, illuminate the AIR BAG indicator, and disable the I/P module deployment loop. If either the SDM or PPS were replaced make sure the correct part numbers were used for the vehicle application.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the PPS module and the SDM.
  2. Test for less than 1 ohm between the serial data circuit terminal 18 at the PPS harness connector and terminal 35 at the SDM harness connector. If greater than the specified range, test the signal circuit for an open/high resistance.
  3. If all circuits test normal, test or replace the PPS module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS and SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The Inflatable Restraint Passenger Presence System (PPS) is used to monitor the weight of an occupant on the front outboard passenger seat and communicate the status to the sensing and diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel (I/P) module. The PPS consist of an electronic control module, silicone filled sensor pad, pressure sensor, seat belt tension retractor sensor, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the pressure sensor. The pressure sensor sends a voltage signal to the PPS module. If the pressure from the occupant's weight is less than a specified value, the PPS module will send a suppress signal to the SDM to disable the I/P module. If the pressure from the occupant's weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P module. The PPS module will notify the customer of the enable/disable status by illuminating one of the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The PPS monitors itself for faults and will set flash DTC if a fault is detected. The PPS will also notify the SDM of a fault. The SDM will respond by setting DTC B0092 and requesting the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 volts.

  1. The PPS detects the voltage at PPS sensor signal is less than 0.05 volt or greater than 4.5 volts for 500 milliseconds.
  2. The PPS detects the voltage at PPS sensor 5-volt reference is less than 4.5 volts or greater than 9.1 volts for 500 milliseconds.
  3. The PPS detects the amperage at PPS sensor low reference is 25 mA or greater for 500 milliseconds.
  1. The SDM disables the instrument panel (I/P) module deployment loop.
  2. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  1. The condition responsible for setting the DTC no longer exists.
  2. The scan tool CLEAR DTC command has been issued.
  3. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the inflatable restraint front PPS sensor.
  2. Ignition OFF, test for less than 1 ohm between the low reference circuit terminal C and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PPS.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground. If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PPS module. If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the PPS module.
  4. Ignition OFF, disconnect the harness connector at the PPS module.
  5. Ignition OFF, test for infinite resistance between the signal circuit terminal B and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. Ignition ON, test for less than 1.0 volt between the signal circuit terminal B and ground. If greater than the specified range, test the signal circuit for a short to voltage.
  7. Test for less than 1 ohm between the signal circuit terminal B at the sensor harness connector and terminal 6 at the PPS harness connector. If greater than the specified range, test the signal circuit for an open/high resistance.
  8. If all circuits test normal, test or replace the inflatable restraint PPS sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageLow resistance
IP Module - Stage 2 - High ControlB0014B0014B0013B0014B0012
IP Module - Stage 2 - Low ControlB0014B0014B0013B0014B0012
IP Module - Stage 1 - High ControlB0019B0019B0017B0019B0016
IP Module - Stage 1 - Low ControlB0019B0019B0017B0019B0016
Side Impact Module - Passenger - High ControlB0030B0030B0029B0030B0028
Side Impact Module - Passenger - Low ControlB0030B0030B0029B0030B0028
Side Impact Module - Driver - HighB0045B0045B0041B0045B0040
Side Impact Module - Driver - LowB0045B0045B0041B0045B0040
Seat Belt Pretensioner - Passenger - High ControlB0059B0059B0058B0059B0057
Seat Belt Pretensioner - Passenger - Low ControlB0059B0059B0058B0059B0057
Seat Belt Pretensioner - Driver - High ControlB0066B0066B0065B0066B0064
Seat Belt Pretensioner - Driver - Low ControlB0066B0066B0065B0066B0064

If a malfunction is detected, a DTC will be stored in non-volatile memory. During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the airbag module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground, and shorts voltage. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

Ignition voltage is between 9-16 volts.

B0014, B0019, B0030, B0045, B0059, B0066

The airbag module high and/or low circuit is shorted to ground for 120 milliseconds.

B0013, B0017, B0029, B0041, B0058, B0065

  1. The airbag module stage 1 or stage 2 high circuit is less than 2.4 volts and the airbag module stage 1 or stage 2 deployment loop is greater than 6 ohms for 500 milliseconds.
  2. The airbag module stage 1 or stage 2 deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.
  1. The airbag module stage 1 or stage 2 high and/or low circuits is shorted to ground or shorted to voltage for 500 milliseconds.
  2. The airbag module stage 1 or stage 2 high circuit is less than 2.4 volts and the airbag module stage 1 or stage 2 deployment loop resistance is less than 6 ohms for 500 milliseconds.

The airbag module high and/or low circuit is shorted to voltage for 120 milliseconds.

B0012, B0016, B0028, B0040, B0057, B0064

The airbag module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM will store a DTC, however if an event occurs the system will still attempt deployments.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 38715-A Driver and Passenger SIR Load Tool. See Special Tools .

IMPORTANTRefer to SIR Service Precautions . When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector. Pretensioner Inflatable restraint module SDM module Inflatable restraint module wiring harness connector SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the appropriate inflatable restraint module.
  2. With the appropriate adaptor, connect J 38715-A in place of the inflatable restraint module. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. Ignition ON, with a scan tool, verify DTC is set as current. If DTC is not set or is set as history, replace the appropriate inflatable restraint module.
  4. Ignition OFF, disconnect J 38715-A and the appropriate adaptor. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  5. Disconnect the harness connector at the SDM.
  6. Ignition ON, test for less than 1 volt between the appropriate high control circuit and ground. I/P module Stage 1 terminal A1 I/P module Stage 2 terminal B1 Left side impact module terminal 1 Right side impact module terminal 1 Left seat belt pretensioner terminal 1 Right seat belt pretensioner terminal 1 If greater than the specified range, test the circuit for a short to voltage.
  7. Test for less than 1 volt between the appropriate low control circuit terminal and ground. I/P module Stage 1 terminal A2 I/P module Stage 2 terminal B2 Left side impact module terminal 2 Right side impact module terminal 2 Left seat belt pretensioner terminal 2 Right seat belt pretensioner terminal 2 If greater than the specified range, test the circuit for a short to voltage.
  8. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal and ground. I/P module Stage 1 terminal A1 I/P module Stage 2 terminal B1 Left side impact module terminal 1 Right side impact module terminal 1 Left seat belt pretensioner terminal 1 Right seat belt pretensioner terminal 1 If less than the specified value, test the circuit for a short to ground.
  9. Test for infinite resistance between the appropriate low control circuit terminal and ground. I/P module Stage 1 terminal A2 I/P module Stage 2 terminal B2 Left side impact module terminal 2 Right side impact module terminal 2 Left seat belt pretensioner terminal 2 Right seat belt pretensioner terminal 2 If less than the specified value, test the circuit for a short to ground.
  10. Test for less than 1 ohm between the following high control circuit terminals. I/P module Stage 1 terminal A1 and SDM terminal 9 I/P module Stage 2 terminal B1 and SDM terminal 30 Left side impact module terminal 1 and SDM terminal 17 Right side impact module terminal 1 and SDM terminal 14 Left seat belt pretensioner terminal 1 and SDM terminal 38 Right seat belt pretensioner terminal 1 and SDM terminal 35 If greater than the specified range, test the circuit for an open/high resistance.
  11. Test for less than 1 ohm between the following low control circuit terminals. I/P module Stage 1 terminal A2 and SDM terminal 10 I/P module Stage 2 terminal B2 and SDM terminal 31 Left side impact module terminal 2 and SDM terminal 16 Right side impact module terminal 2 and SDM terminal 15 Left seat belt pretensioner terminal 2 and SDM terminal 37 Right seat belt pretensioner terminal 2 and SDM terminal 36 If greater than the specified range, test the circuit for an open/high resistance.
  12. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Instrument Panel Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Driver or Passenger Seat Side Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Inflatable Restraint Side Impact Module Wiring Harness Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  4. «Seat Belt Buckle Pretensioner Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  5. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Steering Wheel Module Stage 1 High ControlB0024B0024B0026B0024B0022
Steering Wheel Module Stage 1 Low ControlB0024B0024B0026B0024B0022
Steering Wheel Module Stage 2 High ControlB0043B0043B0044B0043B0042
Steering Wheel Module Stage 2 Low ControlB0043B0043B0044B0043B0042

During a frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. There are 2 shorting bars used within the steering wheel module coil connector which will short together both steering wheel module stage 1 high circuit and steering wheel module stage 1 low circuit and both steering wheel module stage 2 high circuit and steering wheel module stage 2 low circuit when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

Ignition voltage is between 9-16 volts.

B0022 stage 1 or B0042 stage 2

The steering wheel module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0024 stage 1 or B0043 stage 2

  1. The steering wheel module stage 1 or stage 2 high circuit is less than 2.4 volts and the steering wheel module stage 1 or stage 2 deployment loop is greater than 6 ohms for 500 milliseconds.
  2. The steering wheel module stage 1 or stage 2 deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.

B0026 stage 1 or B0044 stage 2

  1. The steering wheel module stage 1 or stage 2 high and/or low circuits is shorted to ground or shorted to voltage for 500 milliseconds.
  2. The steering wheel module stage 1 or stage 2 high circuit is less than 2.4 volts and steering wheel module stage 1 or stage 2 deployment loop resistance is less than 6 ohms for 500 milliseconds.
  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM will store a DTC, however if an event occurs the system will still attempt deployments.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 38715-A Driver and Passenger SIR Load Tool. See Special Tools .

IMPORTANTRefer to SIR Service Precautions . When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector: Air bag module SDM module Air bag wiring harness connector SDM wiring harness connector
  1. Verify that the steering wheel module connector and the CPA are engaged. If the above condition is not found, make the appropriate repair.
  2. Ignition OFF, disconnect the harness connector at the steering wheel module.
  3. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the steering wheel module. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  4. Ignition ON, verify DTC is set as current. If the DTC is not set or is set as history, cycle ignition OFF, disconnect the adapter and J 38715-A , reconnect the harness connector at the steering wheel module, and cycle the ignition ON. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . If the DTC resets after reconnecting the module, replace the steering wheel module.
  5. Ignition OFF, disconnect special tool J 38715-A and adaptor. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  6. Disconnect the in-line harness connector at the steering wheel module coil.
  7. With the appropriate load tool adaptor, connect special tool J 38715-A . See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  8. Ignition ON, with a scan tool, verify DTC is set as current. If DTC is not set or is set as history, replace the steering wheel module coil.
  9. Ignition OFF, disconnect special tool J 38715-A and adaptor. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  10. Disconnect the harness connector at the SDM.
  11. Ignition ON, test for less than 1 volt between the appropriate high control circuit listed below and ground: Steering wheel module coil connector stage 1 terminal A1 Steering wheel module coil connector stage 2 terminal B1 If greater than the specified range, test the circuit for a short to voltage.
  12. Test for less than 1 volt between the appropriate low control circuit listed below and ground: Steering wheel module coil connector stage 1 terminal A2 Steering wheel module coil connector stage 2 terminal B2 If greater than the specified range, test the circuit for a short to voltage.
  13. Ignition OFF, test for infinite resistance between the appropriate high control circuit listed below and ground: Steering wheel module coil connector stage 1 terminal A1 Steering wheel module coil connector stage 2 terminal B1 If less than the specified value, test the circuit for a short to ground.
  14. Test for infinite resistance between the appropriate low control circuit listed below and ground: Steering wheel module coil harness connector stage 1 terminal A2 Steering wheel module coil harness connector stage 2 terminal B2 If less than the specified value, test the circuit for a short to ground.
  15. Test for less than 1 ohm between the appropriate high control circuit terminals listed below: Steering wheel module coil harness connector stage 1 terminal A1 and SDM terminal 13 Steering wheel module coil harness connector stage 2 terminal B1 and SDM terminal 34 If greater than the specified range, test the circuit for an open/high resistance.
  16. Test for less than 1 ohm between the appropriate low control circuit terminals listed below: Steering wheel module coil harness connector stage 1 terminal A2 and SDM terminal 12 Steering wheel module coil harness connector stage 2 terminal B2 and SDM terminal 33 If greater than the specified range, test the circuit for an open/high resistance.
  17. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Steering Wheel Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Inflatable Restraint Steering Wheel Module Coil Centering»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__inflatable-restraint-steering-wheel-module-coil)
  3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that converts vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the inflator modules, and causing DTC B0051 to set.

Ignition voltage is between 9-16 volts.

  1. The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal modules.
  2. The SDM detects a side impact of sufficient force to warrant deployment of a side impact module.
  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM records crash data.

DTC B0051 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information

With a scan tool, verify DTC B0051 is not set.

  1. If DTC is set, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that converts vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the inflator modules. DTC B0053 will set along with DTC B0051 when a deployment occurs while a circuit malfunction is present in any one of the deployment loops.

Ignition voltage is between 9-16 volts.

  1. The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal modules when a current SIR DTC is set.
  2. The SDM detects a side impact of sufficient force to warrant deployment of a side impact module when a current SIR DTC is set.
  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM records crash data.

DTC B0053 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions.

DTC B0053 will be accompanied by another DTC, other than DTC B1000 and DTC B0051. Repair the malfunction causing the other DTCs before installing a new SDM.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information

With a scan tool, verify DTC B0053 is not set.

  1. If DTC is set, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Side Impact Sensor Left SignalB0077
Side Impact Sensor Left VoltageB0077B0077B0077B0077B0077
Side Impact Sensor Right SignalB0078
Side Impact Sensor Right VoltageB0078B0078B0078B0078B0078

The inflatable restraint side impact sensor (SIS) utilizes a unidirectional 2-wire circuit. The SIS modulates current on the interface to send ID, state of health (SOH), and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for the SIS. When the ignition is turned ON and input power from the SDM is first detected, the SIS responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The SIS continually communicates status messages to the SDM, which determines if a fault is present in the SIS circuit. When a fault is detected, the SDM resets the SIS twice by removing and reapplying power to it. If the fault is still present, the SDM will set a DTC.

Ignition voltage is between 9-16 volts.

All of the following conditions exist for 2.5 seconds

B0077 for SIS - Left Front or B0078 for SIS - Right Front

  1. A valid ID message is not received within 5 seconds of the SIS being powered up.
  2. The SDM has not received a message from the SIS for more than 375 milliseconds.
  3. The SDM has reset the SIS twice without detecting a valid ID message.

B0079 for SIS - Left Front or B0081 for SIS - Right Front

  1. The SDM has received an ID message from the SIS which does not match the ID stored in the SDM memory.
  2. The SDM has reset the SIS twice without detecting a correct ID message.

B0080 for SIS - Left Front or B0082 for SIS - Right Front

The SDM has received a NOK message from the SIS.

  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SIR system is disabled and no deployments are allowed.
  1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
  2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information.

  1. Verify DTC B0079, B0080, B0081, or B0082 is not set. If DTC is set, replace the applicable impact sensor.
  2. Disconnect the harness connector at the applicable impact sensor and the SDM.
  3. Test for infinite resistance between the applicable impact sensor signal circuit terminal A and ground. If less than the specified value, test the circuit for a short to ground.
  4. Ignition ON, test for less than 1 volt between the applicable impact sensor signal circuit terminal A and ground. If greater than the specified range, test the circuit for a short to voltage.
  5. Ignition ON, test for less than 1 volt between the applicable impact sensor voltage circuit terminal B and ground. If greater than the specified range, test the circuit for a short to voltage.
  6. Test for less then 1 ohm between the applicable impact sensor and SDM signal circuit terminals listed below: Left front end sensor terminal B and SDM terminal 5 Right front end sensor terminal B and SDM terminal 6 If greater than the specified range, test the circuit for an open/high resistance.
  7. Test for less then 1 ohm between the applicable impact sensor and SDM voltage circuit terminals listed below: Left front end sensor terminal A and SDM terminal 26 Right front end sensor terminal A and SDM terminal 27 If greater than the specified range, test the circuit for an open/high resistance.
  8. If the circuits test normal, replace the applicable impact sensor.
  9. Reconnect all SIR components
  10. Verify DTC B0077 or B0078 is not set. If DTC is set, replace the SDM.
  1. «Inflatable Restraint Side Impact Sensor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Seat Position Sensor Left Low ReferenceB0084B0084B0084B0084B0084
Seat Position Sensor Left SignalB0084B0084B0084B0084B0084
Seat Position Sensor Right Low ReferenceB0083B0083B0083B0083B0083
Seat Position Sensor Right SignalB0083B0083B0083B0083B0083

The inflatable restraint seat position sensor (SPS) is used to determine the proximity of a front driver or passenger seat position with respect to the frontal air bag. The SPS interfaces with the sensing and diagnostic module (SDM). The state of the SPS allows the SDM to disable stage 2 of the frontal air bag for a front seat that is forward of a forward/rearward point in seat track travel. The SPS is a hall effect sensor that is mounted on the outboard seat track of both the driver and passenger seats. The seat track includes a metal bracket that shunts the SPS magnetic circuit creating 2 states of seat position. The shunted state represents a rearward seat position. The non-shunted state represents a forward position. The SPS provides 2 current ranges, one range for the shunted state and a second range for a non-shunted state. These 2 states are inputs to the SDM. State 1 (shunted) being the rearward threshold and state 2 (non-shunted) being the forward threshold. When the SDM receives input from a SPS that state 1 threshold is reached (seat is rearward) the SDM will not disable stage 2 deployment, if required by the deployment sensors. When state 2 threshold is reached (seat is forward) the SDM will disable stage 2 deployment on the side the seat is forward. The SDM monitors the SPS circuit and if a fault is detected the SDM will set codes B0083 or B0084 and defaults to disabling stage 2 frontal deployment. This will only default on the side of the vehicle the sensor has a fault.

Ignition voltage is between 9-16 volts.

B0083 for Right Front Seat Position Sensor or B0084 for Left Front Seat Position Sensor

  1. The SDM detects the SPS circuit amperage is 4 mA or less for 500 milliseconds.
  2. The SDM detects the SPS circuit amperage is between 8-11 mA for 500 milliseconds.
  3. The SDM detects the SPS circuit amperage is 18 mA or greater for 500 milliseconds.
  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM defaults the SPS to seat forward threshold.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the applicable seat position sensor connector.
  2. Disconnect the harness connector at the SDM.
  3. Ignition ON, test for less than 1 volt between the seat position sensor signal circuit terminal A and ground. If greater than the specified range, test the circuit for a short to voltage.
  4. Ignition ON, test for less than 1 volt between the applicable seat position sensor low reference circuit terminal B and ground. If greater than the specified range, test the circuit for a short to voltage.
  5. Test for infinite resistance between the seat position sensor signal circuit terminal A and ground. If less than the specified range, test the circuit for a short to ground.
  6. Test for infinite resistance between the seat position sensor signal terminal B and ground. If less than the specified value, test the circuit for a short to ground.
  7. Test for less then 1 ohm of resistance between the following seat position sensor signal circuit terminals. Passenger seat position sensor terminal A and SDM harness connector terminal 25. Driver seat position sensor terminal A and SDM harness connector terminal 24. If greater than the specified range, test the circuit for an open/high resistance.
  8. Test for less then 1 ohm between the following seat position sensor low reference circuit terminals. Passenger seat position sensor terminal B and SDM harness connector terminal 11. Driver seat position sensor terminal B and SDM harness connector terminal 11. If greater than the specified range, test the circuit for an open/high resistance.
  9. If all circuits test normal, replace the applicable front end sensor.
  10. Reconnect all SIR components. Ignition ON, with a scan tool clear and recheck for DTCs. If the seat position sensor DTC returns and is current, replace the SDM.
  1. «Inflatable Restraint Seat Position Sensor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming

Repair Verification

Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs. Verify no DTCs are set.

  1. If DTC B0083 or B0084 was current replace the SDM.
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
PPS Module IgnitionB0092, B1530B0092, B1530
PPS Module Serial Data LinkB0092, B0098, B1530B0092, B0098, B1530B0092, B0098, B1530B0092, B0098, B1530
PPS Module GroundB0092, B1530B0092, B1530

When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. When the SDM has completed the power-up mode, the SDM will establish communication with the passenger presence system (PPS). The PPS will respond by illuminating both the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. The SDM will transmit a request message to the PPS to receive the PPS verification ID. The PPS will transmit the verification ID to the SDM and the SDM will compare the ID received to data stored in memory. The SDM will also set DTC B0092 to notify the driver that the PPS has a current malfunction present. When the SDM detects that the PPS has set any one of the following DTCs 023, 024, 063, 064, or 065, the SDM will disable the instrument panel (I/P) module deployment loop, set DTC B0092, and illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 volts.

  1. The PPS has a current fault.
  2. The SDM has not received the correct verification ID from the PPS.
  1. The SDM disables the I/P module deployment loop.
  2. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
IMPORTANTDTC B0092 will also set, if the PPS has a current malfunction, and has set any one of the following DTCs 023, 024, 064, or 065. The SDM will set DTC B0092 as current and command the AIR BAG indictor ON. This is done to notify the driver of any PPS malfunctions. When DTC B0092 is present, it is important to check the PPS for any current DTC. Refer to Passenger Presence System Flash Code Procedures . Any current PPS DTC must be diagnosed before performing this diagnostic procedure.

DTC B0092 is an indication that the SDM has received an incorrect PPS verification ID or has lost communication with the PPS. The SDM will continue to request the verification ID from the PPS for 5 seconds. If the SDM does not receive the correct verification ID from the PPS within 5 seconds, the SDM will set the DTC as current, illuminate the AIR BAG indicator, and disable the I/P module deployment loop.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector. PPS module SDM PPS module wiring harness connector SDM wiring harness connector
  1. Ignition ON, observe the function of the inflatable restraint passenger air bag ON and OFF indicators. The inflatable restraint passenger air bag ON and OFF indicators should illuminate. If the inflatable restraint passenger air bag ON/OFF status indicators do not illuminate refer to.
  2. Ignition OFF, disconnect the harness connector at the PPS module.
  3. Test for less than 1 ohm between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance
  4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 9 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  5. Disconnect the harness connector at the SDM.
  6. Test for infinite resistance between the serial data link terminal 18 and ground. If less than the specified value, test the serial data link for a short to ground.
  7. Test for less than 1 ohm between the PPS module serial data link terminal 18 and the SDM serial data link terminal 35. If greater than the specified range, test the serial data link for an open/high resistance.
  8. Ignition ON, test for less than 1-volt between the PPS module serial data link terminal 18 and ground. If greater than the specified range, test the serial data link for a short to voltage.
  9. If all circuits test normal, replace the PPS module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. When the SDM has completed the power-up mode, the SDM will establish communication with the passenger presence system (PPS). The PPS will respond by illuminating both of the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. The SDM will then transmit a request message to the PPS to receive the PPS verification ID. The PPS will transmit the verification ID to the SDM, and the SDM will compare the ID received to data stored in memory. If the data stored in memory does not match the information transmitted by the PPS, the SDM will set DTC B0098 or B0092 and illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 volts.

  1. The PPS verification ID does not match the ID that is stored in the SDM.
  2. The SDM has loss or no communication with the PPS.
  1. The SDM will disable the I/P module deployment loop.
  2. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  3. The PPS will illuminate the PASSENGER AIR BAG OFF indicator.
  1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

DTC B0098 and/or DTC 064 is an indication that the SDM has received an incorrect PPS verification ID. The SDM will continue to request the verification ID from the PPS for 5 seconds. If the SDM does not receive the correct verification ID from the PPS within 5 seconds, the SDM will set DTC B0098. If either the SDM or PPS were replaced, verify that the correct part numbers were used for the vehicle application.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information.

  1. Check to see if the PPS was replaced. Verify the correct PPS was installed. If the wrong PPS was installed, replace with the correct PPS.
  2. Check to see if the SDM was replaced. Verify the correct SDM was installed. If the wrong SDM was installed, replace with the correct SDM.
  3. Check to see if DTC B1001 is set. Verify DTC B1001 is not set. If DTC B1001 is current, refer to.
  4. Replace the PPS. Ignition ON, use the scan tool to clear the DTCs then recheck for DTC B0098. Verify DTC B0098 does not set. If DTC B0098 resets then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PPS and SDM replacement, setup, and programming

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Front Impact Sensor Signal Circuit Left/RightB0100, B0103B0100, B0103B0100, B0103B0100, B0103B0100, B0103
Front End Sensor Low Reference Circuit Left/RightB0100, B0103B0100, B0103B0100, B0103

The inflatable restraint electronic frontal sensor (EFS) utilizes a unidirectional 2-wire circuit. The EFS modulates current on the interface to send ID, state of health (SOH), and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for the EFS. When the ignition is turned ON and input power from the SDM is first detected, the EFS will respond by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The EFS continually communicates status messages to the SDM, which determines if a fault is present in the EFS circuit. When a fault is detected, the SDM resets the EFS twice by removing and reapplying power. If the fault is still present, the SDM will set a diagnostic trouble code (DTC).

Ignition voltage is between 9-16 volts.

B0100 and B0103

  1. A valid ID message is not received within 5 seconds of the EFS being powered up.
  2. Status message is not received.
  3. The SDM has failed twice to reset the EFS.

B0102 and B0105

  1. The SDM has received an ID message from the EFS that does not match the ID stored in the SDM memory.
  2. When 2 EFS resets are attempted without the correct identification being detected by the SDM.

B0101 and B0104

Will set when the SDM has received a NOK (Not OK) message from the EFS.

  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM attempts to reset the EFS.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANTRefer to SIR Service Precautions . When removing the connectors, inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector: Front end sensor SDM module Front end sensor wiring harness connector SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the SDM and the appropriate front end sensor.
  2. Ignition ON, test for less than 1-volt between the front end sensor signal circuit terminal B and ground. If greater than the specified range, test the circuit for a short to voltage.
  3. Ignition ON, test for less than 1-volt between the front end sensor low reference circuit terminal A and ground. If greater than the specified range, test the circuit for a short to voltage.
  4. Test for infinite resistance between the front end sensor signal circuit terminal B and ground. If less than the specified value, test the circuit for a short to ground.
  5. Test for less than 1 ohm between the front end sensor signal circuit terminals listed below: Right front end sensor terminal B and SDM harness connector terminal 37. Left front end sensor terminal B and SDM harness connector terminal 36. If greater than the specified range, test the signal circuit for an open/high resistance.
  6. Test for less than 1 ohm between the front end low reference circuit terminals listed below: Right front end sensor terminal A and SDM harness connector terminal 39. Left front end sensor terminal A and SDM harness connector terminal 38. If greater than the specified range, test the low reference circuit for an open/high resistance.
  7. If all circuits test normal, replace the appropriate front end sensor.
  8. Reconnect all SIR components. Ignition ON, verify the DTC does not set as current. If the DTC resets as current, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Front End Sensor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) stores the vehicles restraint ID from the vehicle identification number (VIN) and the last 4 digits of the SDM part number. When the ignition is turned ON, the SDM compares this information to the information stored in the body control module (BCM) over the serial data communication circuit. If there is a mismatch between the information stored in the SDM and BCM, DTC B1001 will set.

Ignition voltage is between 9-16 volts.

  1. The last 4 digits of the SDM part number does not match the last 4 digits stored in the BCM.
  2. The VIN stored in the BCM does not match that of the vehicle.
  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM disables all deployments.
  1. The last 4 digits of the SDM part number match the last 4 digits stored in the BCM.
  2. The restraints ID that is stored in the SDM matches the restraints ID that is stored in the BCM.

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the BCM were replaced without reprogramming the BCM with the new information.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information

  1. With a scan tool, verify the BCM is programmed with the correct VIN number displayed on the vehicle VIN plate. If the BCM has the wrong VIN number, perform the Setup SDM Part Number into BCM procedure.
  2. Verify DTC B1001 is not set. If DTC B1001 is set, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM or BCM replacement, setup, and programming

The Inflatable Restraints Passenger Presence System (PPS) is a calibrated system that requires rezeroing anytime the seat cushion trim attachments have been removed or the PPS has been replaced. The procedures below are designed to assist in the rezeroing of the PPS. Before you start, read these procedures carefully and completely. For further information regarding the PPS refer to SIR System Description and Operation .

IMPORTANTThe following procedures must be followed
  1. Read this procedure carefully and completely.
  2. The PPS will not function properly if the PPS rezeroing procedure is not performed.
  3. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) after successfully completing the rezeroing procedure to ensure the system is functioning properly.

Passenger Presence System (PPS) Rezeroing Procedure

IMPORTANTBefore rezeroing the PPS, the front passenger seat must be completely empty of all items. The presence of any items on the front passenger seat will affect the calibration and operation of the PPS.
IMPORTANTWhen rezeroing the PPS, the instrument panel cluster (IPC) and dash lights will begin dimming ON and FF. This is normal operation during the rezeroing procedure and does not indicate additional system faults.
  1. Empty the front outboard passenger seat.
  2. Verify that all SIR and PPS components, connectors, and connector position assurances (CPAs) are properly connected and mounted.
  3. Install a scan tool.
  4. Turn ON the ignition, with the engine OFF.
  5. Use the scan tool in order to clear the SIR and PPS DTCs.
  6. With a scan tool, request the PPS rezeroing procedure.
  7. Initiate the PPS rezeroing procedure. The PPS will illuminate both PASSENGER AIR BAG ON and OFF indicators until the rezeroing procedure has been completed. When the rezeroing procedure has been successfully completed, the PPS will display the current system status by using either the PASSENGER AIR BAG ON or OFF indicator. If the rezeroing procedure was unsuccessful, both PASSENGER AIR BAG ON and OFF indicators will alternate from no illumination to full illumination in 1 second intervals for 5 seconds. The PPS will treat an unsuccessful rezero attempt as a system fault.
  8. If the rezeroing procedure was unsuccessful, repeat this procedure. Due to the communication status between the SDM and the PPS module, this procedure may have to be repeated until a successful rezero attempt has been achieved.
  9. After the PPS has been successfully rezeroed, perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) .

Symptoms - SIR

IMPORTANTComplete the following steps before using the symptom tables
  1. Perform «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) before using the symptom tables in order to verify that all of the following are true: There are no DTCs set. The inflatable restraint sensing and diagnostic module (SDM) can communicate via the serial data link.
  2. Review the SIR system description and operation in order to familiarize yourself with the system functions. Refer to «SIR System Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the SIR system. Refer to «Checking Aftermarket Accessories»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

  1. «Air Bag Indicator Circuit Malfunction»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) in order to diagnose the symptom.
  2. «Passenger Presence System Indicator Circuit Malfunction»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) in order to diagnose the symptom.
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the instrument panel cluster (IPC) flashes the air bag indicator 7 times for a bulb check. The inflatable restraint sensing and diagnostic module (SDM) performs diagnostic tests on the SIR system during the bulb check. If any malfunction exists the SDM will request the IPC to illuminate the air bag indicator steady, via serial data. If a preexisting malfunction exists, the air bag indicator will illuminate steady immediately after the ignition is turned ON. If the ignition 1 voltage is outside of the normal operating voltage range 9-16 volts, the SDM will request the IPC to illuminate the air bag indicator with no DTCs present, then disables all deployment loops.

A DTC B1370 may set if the ignition 1 circuit is outside the 9-16 volts range.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition ON, verify the scan tool Battery Voltage parameter is 9-16 volts. If not within the specified range, refer to «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) .
  2. Cycle the ignition from OFF to ON while observing the IPC. The SIR warning indicator should flash then turn OFF. If the SIR warning indicator continually flashes, reprogram the SDM.
  3. With a scan tool, perform the IPC Display Test. The Air Bag indicator should turn ON and OFF as commanded. If the Air Bag indicator does not cycle between the commanded states, replace the IPC.
  4. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for IPC and SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to Voltage
Ignition 1 Voltage11*1
Passenger Air Bag OFF Indicator Control42*2
Passenger Air Bag ON Indicator Control53*3
1. No indicators will illuminate. 2. The OFF indicator will not illuminate. 3. The ON indicator will not illuminate. 4. The OFF indictor will illuminate any time the ignition is ON. 5. The ON indictor will illuminate any time the ignition is ON. * High resistance may cause any or all indicators to illuminate less bright than normal.

The PASSENGER AIR BAG ON/OFF indicators, located in the center of instrument panel cluster (IPC), are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the I/P inflator module. When the ignition is turned ON, the PPS module is supplied with voltage and illuminates the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. The PPS module conducts tests on the PPS components and circuits while the PASSENGER AIR BAG ON/OFF indicators are illuminated. If no malfunctions are detected, the PPS module will illuminate the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the PPS. If a malfunction is detected, the PPS module will store a diagnostic trouble code (DTC), default the PPS to the OFF state, and communicate with the SDM that a DTC has been set. The SDM will request the IPC to illuminate the AIR BAG indicator to notify the driver of a PPS malfunction.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

With the passenger seat occupied and unoccupied the inside rearview mirror air bag on/off indicator should switch states within 5 seconds.

IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. Inflatable restraint passenger air bag on/off indicator. Inflatable restraint passenger air bag on/off indicator wiring harness.
  1. Ignition OFF, disconnect the harness connector at the inside rearview mirror
  2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 13 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 inside rearview mirror.
  3. Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 13.
  4. With the passenger seat occupied and unoccupied 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 PPS module. 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 PPS module.
  5. Connect a test lamp between the control circuit terminal 4 and the ignition circuit terminal 13.
  6. With the passenger seat occupied and unoccupied 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 PPS module. 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 PPS module.
  7. If all circuits test normal, replace the inside rearview mirror.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PPS module replacement, setup, and programming

SIR Disabling and Enabling

SIR component location affects how a vehicle should be serviced. There are parts of the SIR system installed in various locations around a vehicle. To find the location of the SIR components refer to SIR Identification Views .

There are several reasons for disabling the SIR system, such as repairs to the SIR system or servicing a component near or attached to an SIR component. There are several ways to disable the SIR system depending on what type of service is being performed. The following information covers the proper procedures for disabling/enabling the SIR system.

ConditionAction
If the vehicle was involved in an accident with an air bag deployment.Disconnect the negative battery cable(s) *. Refer to Repairs and Inspections Required After a Collision .
When performing SIR diagnostics.Follow the appropriate SIR service manual diagnostic procedure(s) *
When removing or replacing an SIR component or a component attached to an SIR component.Disconnect the negative battery cable(s) *
If the vehicle is suspected of having shorted electrical wires.Disconnect the negative battery cable(s) *
When performing electrical diagnosis on components other than the SIR system.Remove the SIR/Airbag fuse(s) when indicated by the diagnostic procedure to disable the SIR system
* DTCs will be lost when the negative battery cable is disconnected.

SIR Service Precautions

WARNINGWhen performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Failure to observe the correct procedure could cause deployment of the SIR components. Serious injury can occur. Failure to observe the correct procedure could also result in unnecessary SIR system repairs.

The inflatable restraint sensing and diagnostic module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags if the SDM loses battery power during a collision. Deployment power is available for as much as 1 minute after disconnecting the vehicle power. Waiting 1 minute before working on the system after disabling the SIR system prevents deployment of the air bags from the reserved energy supply.

General Service Instructions

The following are general service instructions which must be followed in order to properly repair the vehicle and return it to its original integrity

  1. Do not expose inflator modules to temperatures above 65°C (150°F).
  2. Verify the correct replacement part number. Do not substitute a component from a different vehicle.
  3. Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system.

Discard any of the following components if it has been dropped from a height of 91 cm (3 feet) or greater

  1. Inflatable restraint sensing and diagnostic module (SDM)
  2. Any Inflatable restraint air bag module
  3. Inflatable restraint steering wheel module coil
  4. Any Inflatable restraint sensor
  5. Inflatable restraint seat belt pretensioners
  6. Inflatable restraint Passenger Presence System (PPS) module or sensor

Disabling Procedure - Air Bag Fuse

  1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
  2. Place the ignition in the OFF position.
  3. Locate and remove the fuse(s) supplying power to the SDM. Refer to «SIR Schematics»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/chevrolet/corvette/c6-2004-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-electrical-center-id-and-component-and-splice-pack-connector-end-views) .
  4. Wait 1 minute before working on the system.

Enabling Procedure - Air Bag Fuse

  1. Place the ignition in the OFF position.
  2. Install the fuse(s) supplying power to the SDM. Refer to «SIR Schematics»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/chevrolet/corvette/c6-2004-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-electrical-center-id-and-component-and-splice-pack-connector-end-views) .
  3. Turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
  4. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) .

Disabling Procedure - Negative Battery Cable

  1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
  2. Place the ignition in the OFF position.
  3. Disconnect the negative battery cable from the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
  4. Wait 1 minute before working on system.

Enabling Procedure - Negative Battery Cable

  1. Place the ignition in the OFF position.
  2. Connect the negative battery cable to the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
  3. Turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
  4. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) .
WARNINGWhen performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling . Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.

The inflatable restraint sensing and diagnostic module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags. Deployment power is available for as much as 1 minute after disconnecting the vehicle power. Disabling the SIR system prevents deployment of the air bags from the reserved energy supply.

The following are general service instructions which must be followed in order to properly repair the vehicle and return it to its original integrity

  1. Do not expose inflator modules to temperatures above 65°C (150°F).
  2. Verify the correct replacement part number. Do not substitute a component from a different vehicle.
  3. Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system.

Discard any of the following components if it has been dropped from a height of 91 cm (3 feet) or greater

  1. Inflatable restraint sensing and diagnostic module (SDM)
  2. Inflatable restraint I/P module
  3. Inflatable restraint steering wheel module
  4. Inflatable restraint steering wheel module coil
  5. Inflatable restraint side impact modules
  6. Inflatable restraint side impact sensors (SIS)
  7. Inflatable restraint seat belt pretensioners
  8. Inflatable restraint front end sensors

Removal Procedure

  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the retaining bolts from the inflatable restraint front end sensor.
  3. Remove the sensor from the vehicle.

Installation Procedure

  1. Install the sensor from the vehicle.
  2. Install the retaining bolts to the inflatable restraint front end sensor. Tighten: Tighten the bolts to 9 N.m (80 lb in).
  3. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the front side door trim panel. Refer to «Front Side Door Trim Panel Replacement - Left Side»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Front Side Door Trim Panel Replacement - Right Side»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  3. Remove the retaining bolts from the inflatable restraint side impact sensor.
  4. Remove the sensor from the vehicle.
  1. Install the sensor to the vehicle.
  2. Install the retaining bolts to the inflatable restraint side impact sensor. Tighten: Tighten the bolts to 9 N.m (80 lb in).
  3. Install the front side door trim panel. Refer to «Front Side Door Trim Panel Replacement - Left Side»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Front Side Door Trim Panel Replacement - Right Side»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  4. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
WARNINGDo not strike or jolt the inflatable restraint sensing and diagnostic module (SDM). Before applying power to the SDM, make sure that it is securely fastened with the arrow facing toward the front of the vehicle. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
WARNINGRefer to SIR Warning .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the accessory trim plate. Refer to «Instrument Panel Accessory Trim Plate Replacement»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-trim-and-console-trim) .
  3. Remove the connector position assurance (CPA) from the sensing and diagnostic module (SDM) harness connector.
  4. Disconnect the SDM harness connector.
  5. Remove the SDM mounting fasteners.
  6. Remove the SDM from the instrument panel (I/P) center support system.
  1. Remove any dirt, grease, or other impurities from the mounting surface.
  2. Install the SDM horizontally to the I/P center support system.
  3. Point the arrow on the SDM toward the front of the vehicle.
  4. Install the SDM mounting fasteners. Tighten: Tighten the fasteners to 10 N.m (89 lb in).
  5. Install the SDM harness connector to the SDM.
  6. Install the CPA to the SDM harness connector.
  7. Install the accessory trim plate. Refer to «Instrument Panel Accessory Trim Plate Replacement»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-trim-and-console-trim) .
  8. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  9. Refer to «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for programming and setup information.

Scheme 5

Scheme 5: Steering Wheel Inflatable Restraint Module Replacement
Scheme 5: Steering Wheel Inflatable Restraint Module Replacement
CalloutComponent Name
WARNING: Refer to SIR Inflator Module Handling and Storage Warning . WARNING: Refer to SIR Warning . Preliminary Procedures Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling . On the sides of the steering wheel are 2 circular openings, place the wheel so that one opening is on top. Using a blunt-ended tool, push the spring fastener inward through the access hole. Repeat the step for the other opening.
1Steering Wheel Inflatable Restraint Module Tip: Release the connector position assurance (CPA) retainer. Disconnect the electrical connectors. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to Inflator Module Handling and Scrapping .
WARNING
Refer to SIR Warning .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the SIR system. Refer to «Steering Wheel Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. Remove the upper and lower shrouds. Refer to «Steering Column Trim Cover Replacement (Manual)»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) or «Steering Column Trim Cover Replacement (Telescoping)»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  4. Remove the steering wheel. Refer to «Steering Wheel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  5. Remove the steering wheel column wire harness (1) from the wire harness straps (2).
  6. Remove the retaining ring (3).
  7. Remove the SIR coil (2) from the steering shaft.
  1. Align the wheels straight ahead.
  2. Center the SIR coil assembly (1), if needed. Refer to «Inflatable Restraint Steering Wheel Module Coil Centering»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__inflatable-restraint-steering-wheel-module-coil) .
  3. Install the existing SIR coil assembly (4) to the steering shaft assembly (2) following these steps: Position the SIR coil assembly (4) to the steering shaft assembly (2). Align the opening in the SIR coil assembly (4) with the horn tower and the locating bump between the 2 tabs on the lock housing cover and sleeve assembly. Seat the SIR coil assembly (4) onto the steering shaft assembly (2).
  4. Install a new SIR coil assembly (4) to the steering shaft assembly (2) following these steps: Assemble the pre-centered SIR coil assembly (4) to the steering shaft assembly (2). Position the SIR coil assembly (4) to the steering shaft assembly (2). Align the opening in the SIR coil assembly (4) with the horn tower and the locating bump between the 2 tabs on the lock housing cover and sleeve assembly. Remove and discard the centering tab.
  5. Install the retaining ring (3) to the steering shaft assembly (2).
  6. Route the lower coil wire harness along the steering column.
  7. Install the steering wheel column wire harness (1) to the wire harness straps (2).
  8. Install the steering wheel. Refer to «Steering Wheel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  9. Remove the upper and lower shrouds. Refer to «Steering Column Trim Cover Replacement (Manual)»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) or «Steering Column Trim Cover Replacement (Telescoping)»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  10. Install the SIR system. Refer to «Steering Wheel Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  11. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .

Inflatable Restraint Steering Wheel Module Coil Centering

  1. Verify the following conditions before centering the SIR coil: The wheels on the vehicle are straight ahead. The block tooth (1) of the steering shaft assembly is in the 12 o'clock position. The ignition switch assembly is in the LOCK position.
  2. If the front (5) of the SIR coil has a centering window (4), and the back side (2) has a spring service lock (1), perform the following steps: Hold the coil with the face up. While depressing the spring service lock, rotate the coil hub clockwise until the coil ribbon stops. Rotate the coil hub slowly, counterclockwise, until the centering window appears yellow and both arrows (3) line up. Release the spring service lock between the locking tab. The SIR coil is now centered. Align the centered SIR coil with the horn tower and slide onto the steering shaft assembly.
  3. If the front (4) of the SIR coil has a centering window (3) and the back side (1) has NO spring service lock, perform the following steps: Hold the coil with the face up. Rotate the coil hub clockwise until the coil ribbon stops. Rotate the coil hub slowly, counterclockwise until the centering window appears yellow and both arrows (2) line up. This is the CENTER position. While holding the coil hub in the CENTER position, align the coil with the horn tower and slide the coil onto the steering shaft assembly.
  4. If no centering window is present on the front side (3) of the SIR coil, but a spring service lock (1) is on the back side (2), perform the following steps: Hold the coil with the back side up. While depressing the spring service lock, rotate the coil hub in the direction of the arrow (4) until the coil ribbon stops. Still pressing the spring service lock, rotate the coil hub in the opposite direction 21/2 revolutions. Release the spring service lock between the locking tabs. The SIR coil is now centered. Align the centered coil with the horn tower and slide the coil onto the steering shaft assembly.
  5. If no centering window appears on the front side (2) of the SIR coil and no spring service lock exists on the back side (1), perform the following steps: Hold the coil with the face up. Rotate the coil hub in the direction of the arrow until the coil ribbon stops. Rotate the coil hub, slowly, counterclockwise, for 21/2 revolutions. This is the CENTER position. While maintaining the coil hub in the CENTER position, align the centered coil with the horn tower and slide the coil onto the steering shaft assembly.
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the instrument panel (I/P) assembly. Refer to «Instrument Panel Assembly Replacement»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-trim-and-console-trim) .
  3. Remove the connector position assurance (CPA) from the I/P module harness connector.
  4. Disconnect the pigtail connector from the I/P module.
  5. Remove the mounting fasteners from the I/P module.
  6. Remove the I/P module from the bracket.
  7. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  1. Install the I/P module to the bracket.
  2. Install the I/P module mounting fasteners. Tighten the fasteners in the order shown in the graphic. Tighten: Tighten the fasteners to 10 N.m (89 lb in).
  3. Connect the pigtail connector to the I/P module.
  4. Install the CPA to the harness connector on the I/P module.
  5. Install the I/P assembly. Refer to «Instrument Panel Assembly Replacement»(/chevrolet/corvette/c6-2004-2014/remont/gauges-instrument-panels/#instrument-panel-trim-and-console-trim) .
  6. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Remove the seat from the vehicle. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  2. Disconnect the electrical connector from the seat position sensor.
  3. Drill out the rivets that retain the position sensor (1) to the seat adjuster track bracket.
  4. Remove the position sensor from the seat adjuster track bracket.
  1. Install the position sensor to the seat adjuster bracket.
  2. Install the rivets that retain the position sensor (1) to the seat adjuster track bracket.
  3. Connect the electrical connector to the position sensor.
  4. Install the seat to the vehicle. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .

Scheme 6

Scheme 6: Inflatable Restraint Passenger Presence System Replacement - Front
Scheme 6: Inflatable Restraint Passenger Presence System Replacement - Front
CalloutComponent Name
WARNING: Refer to SIR Warning . WARNING: Replace the passenger presence system as a complete assembly to prevent possible injury to the occupant. All the components in the service kit are assembled and calibrated as a unit. Using only some of the components in the service kit will cause the passenger presence system to operate improperly. Preliminary Procedure Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front passenger seat. Refer to Driver or Passenger Seat Replacement . Re-zero the inflatable restraint passenger presence system whenever the seat cushion or any component of the passenger presence system is removed. Refer to Control Module References for programming and setup information.
1Seat Cushion Cover Front Seat Cushion Cover and Pad Replacement Tip: Remove the seat cushion cover and pad as an assembly.
2Inflatable Restraint Passenger Presence System Sensor Tip: Disconnect the electrical connector.
3Inflatable Restraint Front Passenger Presence Module Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 3 N.m (25 lb in)
4Inflatable Restraint Front Passenger Presence Module Tip: Disconnect the electrical connector.
WARNING
Refer to SIR Warning .
WARNING
Replace the passenger presence system as a complete assembly to prevent possible injury to the occupant. All the components in the service kit are assembled and calibrated as a unit. Using only some of the components in the service kit will cause the passenger presence system to operate improperly.
CAUTION
Refer to Fastener Caution .
WARNINGFollowing the deployment of a side impact air bag, inspect the following parts for damage. Replace these parts if necessary: The seat cushion frame The seat recliner, if equipped The seat adjuster The seat back frame Failure to do so may cause future personal injury.

Scheme 7

Scheme 7
Scheme 7
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Seat adjuster must be in elevated position to facilitate component access.
  3. Remove the front seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  4. Remove the seat back cover. Refer to «Driver or Passenger Seat Back Cushion Cover and Pad Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  5. Remove the retaining bolts that attach the inflatable restraint side impact module to the seat frame.
  6. Remove the side impact module retainer from the seat back cushion cover.
  7. Remove the wiring harness retaining clips from the seat frame.
  8. Remove the wiring harness from the seat frame.
  9. Remove the side impact module from the seat frame.
  10. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  1. Install the module wiring harness to the seat frame while guiding the wiring harness through the appropriate spots on the seat frame.
  2. Install the wiring harness retaining clips to the seat frame.
  3. Install the side impact module to the seat frame.
  4. Install the side impact module retainer to the seat back cushion cover.
  5. Install the retaining bolts to the side impact module. Tighten: Tighten the bolts to 10 N.m (89 lb in).
  6. Install the seat back cover. Refer to «Driver or Passenger Seat Back Cushion Cover and Pad Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  7. Install the front seat. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  8. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the side impact inflator module from the seat. Refer to «Driver or Passenger Seat Side Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. With the seat back cover in the open position the wiring harness on the side impact inflator module will be exposed. Remove the retaining clips that secure the inflator module wiring harness to the seat.
  4. Remove the wiring harness.
  1. Install the new inflator module wiring harness to the seat. Install the retaining clips that secure the wiring harness to the seat.
  2. Install the side impact inflator module to the seat. Refer to «Driver or Passenger Seat Side Inflatable Restraint Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
WARNINGWhen carrying an undeployed inflatable restraint seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector. Carry the seat belt pretensioner by the piston tube, keeping hands and fingers away from the cable. Make sure the open end of the seat belt pretensioner piston tube points away from you and other people. Do not cover the seat belt pretensioner piston tube opening with your hand. Failure to observe these guidelines may result in personal injury.
WARNINGRefer to SIR Warning .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Disconnect the pretensioner electrical connector from the side air bag connector.
  3. Remove the seat from the vehicle. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  4. Remove the pretensioner fastener (2) and remove the pretensioner (1) from the seat.
  5. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Pretensioner Handling and Scrapping»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  1. Install the pretensioner (1) to the seat. Notice that the pretensioner has a tab that fits into the seat in order to insure that the pretensioner is in the proper position.
  2. Install the fastener (2) while holding the pretensioner in place. Tighten: Tighten the nut to 42 N.m (31 lb ft).
  3. Install the seat into the vehicle. Refer to «Driver or Passenger Seat Replacement»(/chevrolet/corvette/c6-2004-2014/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  4. Carefully route the pretensioner pigtail harness and the seat belt wiring harness under the seat.
  5. Connect the pretensioner electrical connector to the side air bag connector.
  6. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .

Accident With or Without Air Bag Deployment - Component Inspections

WARNINGProper operation of the Supplemental Inflatable Restraint (SIR) sensing system requires that any repairs to the vehicle structure return the vehicle structure to the original production configuration. Not properly repairing the vehicle structure could cause non-deployment of the air bag(s) in a frontal collision or deployment of the air bag(s) for conditions less severe than intended.
WARNINGProper operation of the Supplemental Inflatable Restraint (SIR) sensing system requires that any repairs to the vehicle structure return the vehicle structure to the original production configuration. Not properly repairing the vehicle structure could cause non-deployment of the side impact air bag(s) in a side impact collision or deployment of the side impact air bag(s) for conditions less severe than intended.

After any collision, inspect the following components as indicated. If you detect any damage, replace the component. If you detect any damage to the mounting points or mounting hardware, repair the component or replace the hardware as needed.

  1. The steering column-Perform the steering column accident damage checking procedures. Refer to «Steering Column Accident Damage Inspection (Manual)»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column__steering-column-accident-damage-inspection-manual) or «Steering Column Accident Damage Inspection (Telescoping)»(/chevrolet/corvette/c6-2004-2014/remont/steering-column-switches/#steering-wheel-and-steering-column__steering-column-accident-damage-inspection-telescoping) .
  2. The instrument panel (I/P) knee bolsters and mounting points-Inspect the knee bolsters for bending, twisting, buckling, or any other type of damage.
  3. The I/P brackets, braces, etc.-Inspect for bending, twisting, buckling, or any other type of damage.
  4. The seat belts-Perform the seat belt operational and functional checks. Refer to «Repairs and Inspections Required After a Collision»(/chevrolet/corvette/c6-2004-2014/remont/restraints-control-systems/#seat-belt-system__repairs-and-inspections-required-after-a) .
  5. The I/P cross car beam-Inspect for bending, twisting, buckling, or any other type of damage.
  6. The I/P mounting points and brackets-Inspect for bending, twisting, buckling, or any other type of damage.
  7. Passenger seat bottom equipped with the Passenger Presence System (PPS)-Check for any DTCs or problems that may cause the PPS not to function properly.

Accident With Frontal Air Bag Deployment - Component Replacement and Inspections

After a collision involving air bag deployment, replace the following components.

Note. Important: The front passenger seat is equipped with a PPS, which detects an occupant. If the requirements for disabling the I/P air bag are met then the PPS will communicate with the SDM to disable/turn off the I/P air bag, even in a accident. For more information on the PPS refer to SIR System Description and Operation .

  1. Inflatable restraint I/P module, if deployed and after performing the necessary inspections listed above.
  2. Inflatable restraint steering wheel module
  3. Inflatable restraint sensing and diagnostic module (SDM)
  4. Inflatable restraint front end sensors
  5. Inflatable restraint side impact modules, front seat air bags, if deploy
  6. Inflatable restraint seat belt pretensioners

Perform additional inspections on the following components.

  1. Steering wheel module coil and the coil wiring pigtail-Inspect for melting, scorching, or other damage due to excessive heat.
  2. Mounting points or mounting hardware for the I/P module, steering wheel module, SDM, and pretensioners-Inspect for any damage and repair or replace each component as needed.

Accident With Side Air Bag Deployment - Component Replacement and Inspections

After a collision involving side air bag deployment, replace the following components.

  1. Inflatable restraint side impact sensors (SIS), on the side of the impact.
  2. Inflatable restraint side impact modules, front seat air bags, if deploy
  3. Inflatable restraint sensing and diagnostic module (SDM).
  4. Inflatable restraint seat belt pretensioners

Perform additional inspections on the following components.

  1. Mounting points or mounting hardware for the SIS, and side impact module (LF/RF) on the side of impact-Inspect for any damage and repair or replace each component as needed.
  2. Passenger front seat equipped with the PPS-Inspect for bend or damage to seat bottom.
  3. Mounting points or mounting hardware for the SDM and seat belt pretensioners-Inspect for any damage and repair or replace each component as needed.

Sensor Replacement Guidelines

The side impact sensor replacement policy requires replacing sensors in the area of accident damage. The area of accident damage is defined as the portion of the vehicle which is crushed, bent, or damaged due to a collision. An example of this would be a moderate collision where the front of the vehicle impacts a tree. If the vehicle has an SIR sensor mounted forward of the radiator, it must be replaced.

  1. Replace the sensor whether or not the air bags have deployed.
  2. Replace the sensor even if it appears to be undamaged.

Sensor damage which is not visible, such as slight bending of the mounting bracket or cuts in the wire insulation, can cause improper operation of the SIR/side air bag sensing system. Do not try to determine whether the sensor is undamaged, replace the sensor. Also, if you follow a Diagnostic Trouble Code (DTC) table and a malfunctioning sensor is indicated, replace the sensor.

Special Tools

  1. EL-38826: SIR Deployment Harness
  2. EL-39401-B: SIR Deployment Fixture

For equivalent regional tools, refer to Special Tools .

Live and Undeployed Inflator Module

Take special care when handling or storing an undeployed inflator module. An inflator module deployment produces a rapid generation of gas. This may cause the inflator module, or an object in front of the inflator module, to project through the air in the event of an unlikely deployment.

Dual Stage Inflator Module

Dual stage inflator modules have two deployment stages. If stage 1 was used to deploy a dual stage inflator module, stage 2 may still be active. Therefore, a deployed dual stage inflator module must be treated as an active module. If disposal of a dual stage module is required, both deployment loops must be energized to deploy the air bag.

Scrapping Procedure

During the course of a vehicle's useful life, certain situations may arise which will require the disposal of a live and undeployed inflator module. Do NOT dispose a live and undeployed inflator module through normal disposal channels until the inflator module has been deployed.

Do not deploy the inflator module in the following situations

  1. After replacement of an inflator module under warranty - the inflator module may need to be returned undeployed to the manufacturer.
  2. If the vehicle is the subject of a product liability claim, related to the SIR system and is subject to a preliminary investigation - do NOT alter the SIR system in any manner.
  3. If the vehicle is involved in a campaign affecting the inflator modules - follow the instructions in the Campaign Service Bulletin for proper SIR handling procedures.

Deployment Procedures

You can deploy the inflator module either inside or outside of the vehicle. The method used depends upon the final disposition of the vehicle. Review the following procedures in order to determine which will work best in a given situation

Deployment Outside Vehicle - Steering Wheel Module, I/P Module, and Roof Rail Module

Deploy the inflator module outside of the vehicle when the vehicle will be returned to service. Situations that require deployment outside of the vehicle include the following

  1. Using the SIR diagnostics, you determine that the inflator module is malfunctioning.
  2. The inflator module is cosmetically damaged, scratched, or ripped.
  3. The inflator module pigtail is damaged.
  4. The inflator module connector is damaged.
  5. The inflator module connector terminals are damaged.

Deployment and disposal of a malfunctioning inflator module is subject to any required retention period.

  1. Turn OFF the ignition.
  2. Remove the inflator module.
  3. Clear a space on the ground about 1.85 m (6 ft) in diameter for deployment of the inflator module or deployment fixture. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Ensure you have sufficient ventilation.
  4. Clear the area of loose or flammable objects.
  5. If you are deploying a steering wheel inflator module, place the inflator module in the center of the space with the vinyl trim cover facing up and away from the surface.
  6. When deploying an I/P inflator module, perform the following instructions: Place the EL-39401-B: fixture in the center of the cleared area. Fill the deployment fixture with water or sand. Using the proper nuts and bolts, mount the I/P module (1) to the deployment fixture (2), with the vinyl trim facing up. Securely tighten all fasteners that hold the I/P module (1) to the deployment fixture (2).
  7. When deploying a roof rail module, perform the following instructions: Place the EL-39401-B: fixture (3) in the center of the cleared area. Fill the deployment fixture with water or sand to provide sufficient stabilization of fixture during deployment. Adjust and secure the fixture arms (4) to the deployment fixture (3), using the proper nuts and bolts. Attach the roof rail module in the deployment fixture and securely tighten all fasteners.
  8. Inspect the EL-38826: harness and the appropriate pigtail adapter (2) for damage. Replace as needed.
  9. Short the 2 SIR deployment harness leads (1) together using one banana plug seated into the other.
  10. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
  11. Extend the SIR deployment harness and adapter to the full length from the deployment fixture or area.
  12. Connect the inflator module (1) to the adapter (2) on the SIR deployment harness (3).
  13. Clear the area of people.
  14. Separate the 2 banana plugs on the SIR deployment harness that were shorted together earlier in the procedure.
  15. Place a 12V minimum/2A minimum power source, such as a vehicle battery, near the shorted end of the harness.
  16. Connect the SIR deployment harness wires to the power source. Deployment of the Inflator module will occur when contact is made.
  17. Disconnect the SIR deployment harness from the power source after the inflator module deploys.
  18. If the inflator module did not deploy, disconnect the adapter and discontinue the procedure and contact the Technical Assistance Group. If deployment was successful, proceed to the following steps.
  19. Seat one banana plug into the other in order to short the deployment harness leads.
  20. Put on a pair of shop gloves.
  21. Disconnect the pigtail adapter from the inflator module as soon as possible.
  22. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
  23. Dispose of the deployed inflator module through normal refuse channels.
  24. Wash your hands with a mild soap.

Deployment Inside Vehicle - Vehicle Scrapping Procedure

Deploy the inflator modules inside of the vehicle when destroying the vehicle or when salvaging the vehicle for parts. This includes, but is not limited to, the following situations

  1. The vehicle has completed all useful life.
  2. Irreparable damage occurred to the vehicle in a non-deployment type accident.
  3. Irreparable damage occurred to the vehicle during a theft.
  4. The vehicle is being salvaged for parts to be used on a vehicle with a different VIN, as opposed to rebuilding as the same VIN.
  1. Lower the driver and passenger windows.
  2. Turn the ignition switch to the OFF position and remove the ignition key.
  3. Check that all inflator modules which will be deployed are mounted securely.
  4. Remove all loose objects from the front seats.
  5. Disconnect the steering wheel module yellow connector (1) from vehicle harness yellow connector (3).
  6. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  7. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  8. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. Use these wires to fabricate the driver deployment harness.
  9. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  10. Twist together one end from each of the wires in order to short the wires. Deployment wires shall remain shorted, and not connected to a power source until you are ready to deploy the inflator module.
  11. Twist together the 2 connector wire leads from the high circuits from both stages of the steering wheel module, to one set of deployment wires. Refer to «Component Connector End Views»(/chevrolet/corvette/c6-2004-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-electrical-center-id-and-component-and-splice-pack-connector-end-views) in order to determine the correct circuits.
  12. Inspect that the 3-wire connection is secure.
  13. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  14. Twist together the 2 connector wire leads from the low circuits from both stages of the steering wheel module, to one set of deployment wires. Refer to «Component Connector End Views»(/chevrolet/corvette/c6-2004-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-electrical-center-id-and-component-and-splice-pack-connector-end-views) in order to determine the correct circuits.
  15. Inspect that the 3-wire connection is secure.
  16. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  17. Connect the deployment harness to the connector on the steering wheel module.
  18. Route the deployment harness out of the driver side of the vehicle.
  19. Disconnect the yellow left roof rail harness connector from the vehicle harness connector.
  20. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  21. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  22. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
  23. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  24. Twist together one end from each of the wires in order to short the wires.
  25. Twist together one connector wire lead to one deployment wire.
  26. Secure and insulate the connection using electrical tape.
  27. Twist together and tape the remaining connector wire lead to the remaining deployment wire.
  28. Connect the deployment harness to the yellow connector of the roof rail module.
  29. Route the deployment harness out of the driver side of the vehicle.
  30. Disconnect the I/P module yellow harness connector (1) from the vehicle harness connector (2).
  31. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  32. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  33. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires will be used to fabricate the passenger deployment harness.
  34. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  35. Twist together one end from each of the wires in order to short the wires.
  36. Twist together the 2 connector wire leads from the high circuits from both stages of the I/P module to one set of deployment wires. Refer to «Component Connector End Views»(/chevrolet/corvette/c6-2004-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-electrical-center-id-and-component-and-splice-pack-connector-end-views) in order to determine the correct circuits.
  37. Inspect that the 3-wire connection is secure.
  38. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  39. Twist together the 2 connector wire leads from the low circuits from both stages of the I/P module to one set of deployment wires. Refer to «Component Connector End Views»(/chevrolet/corvette/c6-2004-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-electrical-center-id-and-component-and-splice-pack-connector-end-views) in order to determine the correct circuits.
  40. Inspect that the 3-wire connection is secure.
  41. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  42. Connect the deployment harness to the I/P module in-line connector.
  43. Route the deployment harness out of the passenger side of the vehicle.
  44. Disconnect the yellow harness connector to the right roof rail air bag from the vehicle harness connector.
  45. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  46. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  47. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
  48. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  49. Twist together one end from each of the wires in order to short the wires.
  50. Twist together one connector wire lead to one deployment wire.
  51. Secure and insulate the connection using electrical tape.
  52. Twist together and tape the remaining connector wire lead to the remaining deployment wire.
  53. Connect the deployment harness to the roof rail module yellow connector.
  54. Route the deployment harness out of the passenger side of the vehicle.
  55. Completely cover the windshield and the front door window openings with a drop cloth.
  56. Stretch to the full length all of the deployment harness wires on the right side of the vehicle.
  57. Deploy each deployment loop one at a time.
  58. Place a power source, 12V minimum/2A minimum, such as a vehicle battery, near the shorted end of the harnesses.
  59. Separate one set of wires and touch the wire ends to the power source in order to deploy the selected inflator module.
  60. Disconnect the deployment harness from the power source and twist the wire ends together.
  61. Continue the same process with the remaining deployment harnesses.
  62. Disconnect all harnesses from the vehicle.
  63. Discard the harnesses.
  64. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
  65. If one or all of the inflator modules did not deploy, remove the undeployed modules from the vehicle.

Scheme 8

Scheme 8: Pretensioner Handling and Scrapping
Scheme 8: Pretensioner Handling and Scrapping
WARNINGWhen you are carrying an undeployed seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector on the pretensioner. Do not touch the seat belt pretensioner in the area of the cable (1). Do not cover the tube opening with your hand. Keep the open end of the tube pointed away from you. Do not point the open end of the tube at another person. When the pretensioner deploys the cable retracts. This shortens the pretensioner between the buckle and the mounting bolt. Grasp the pretensioner by the piston tube (2). Disregarding these precautions may result in personal injury or unnecessary SIR system repairs.

During the course of a vehicle's useful life, certain situations may arise which will necessitate the disposal of a live (undeployed) pretensioner. The following information covers the proper procedures for the disposing of a live (undeployed) pretensioner. Deploy the pretensioner before disposal. Do not dispose of a live (undeployed) pretensioner through normal disposal channels until the pretensioner has been deployed. The following information covers the proper procedures for the disposing of a live (undeployed) pretensioner.

  1. After replacement of a pretensioner under warranty. The pretensioner may need to be returned undeployed to the original manufacturer of pretensioner.
  2. If the vehicle is the subject of a Product Liability report related to the SIR system and is subject to a Preliminary Investigation (GM-1241). Do not alter the SIR system in any manner.
  3. If the vehicle is involved in a campaign affecting the pretensioners. Follow the instructions in the Campaign Service Bulletin for proper SIR handling procedures.

The pretensioner can be deployed inside or outside of the vehicle. The method used depends upon the final disposition of the vehicle. Review the following procedures in order to determine which will work best in a given situation.

Deployment Inside the Vehicle

Refer to Inflator Module Handling and Scrapping for deploying the pretensioner inside vehicle under Vehicle Scrapping Procedure.

Deployment Outside Vehicle for Seat Belt Pretensioners

Deploy the seat belt pretensioners outside of the vehicle when the vehicle will be returned to service. Situations that require deployment outside of the vehicle include the following

  1. Using the SIR diagnostics, you determine that the seat belt pretensioner is malfunctioning.
  2. The pretensioner pigtail (if equipped) is damaged.
  3. The pretensioner connector is damaged.
  4. The pretensioner connector terminal is damaged.

Deployment and disposal of a malfunctioning seat belt pretensioner is subject to any required retention period.

WARNINGIn order to prevent accidental deployment of the pretensioner which could cause personal injury, do not dispose of an undeployed pretensioner as normal shop waste. The undeployed pretensioner contains substances that could cause severe illness or personal injury if the sealed container is damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed pretensioner. Failure to dispose of a pretensioner as instructed may be a violation of federal, state, or local laws.

Special Tools

  1. J 39401-B SIR Deployment Fixture. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. J 38826 SIR Deployment Harness. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. J 38826-25 for seat belt pretensioner module adapter
WARNINGWhen you are deploying a pretensioner for disposal, perform the deployment procedures in the order listed. Failure to follow the procedures in the order listed may result in personal injury.
  1. Turn the ignition switch to the OFF position.
  2. Remove the ignition key.
  3. Put on safety glasses.
  4. Remove the seat belt pretensioner from the vehicle. Refer to «Seat Belt Buckle Pretensioner Replacement»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  5. When carrying a pretensioner to the deployment area keep the open end of pretensioner pointed away from the body.
  6. Clear a space on the ground about 1.85 M (6 ft) in diameter for deployment of the pretensioner. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Make sure you have sufficient ventilation.
  7. Make sure no loose or flammable objects are in the area.
  8. Place the J 39401-B SIR Deployment Fixture in the center of the cleared area. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) .
  9. Fill the fixture plastic reservoir with water or sand.
  10. Mount the module (1) in the SIR deployment fixture (3) with the open end facing up using the following mounting method. Adjust and secure the J 39401-B arms (4) to the deployment fixture (3). See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . To mount, use the proper size bolt (2) and nut (5) with washers in order to secure the pretensioner (1) to the deployment fixture brackets (4). Securely tighten all fasteners prior to deployment.
  11. Inspect the J 38826 SIR Deployment Harness and the appropriate pigtail adapter for damage. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/airbag/#supplemental-inflatable-restraint-system) . Replace as needed.
  12. Short the 2 SIR deployment harness (1) leads together using one banana plug seated into the other.
  13. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
  14. Extend the SIR deployment harness and adapter to full length from the deployment fixture.
  15. Connect the pretensioner (1) to the adapter (2) on the deployment harness (3).
  16. Clear the area of people.
  17. Separate the 2 banana plugs on the SIR deployment harness.
  18. Place a 12 V minimum/2 A minimum power source (i.e., vehicle battery) near the shorted end of the harness.
  19. Connect the SIR deployment harness wires to the power source. Pretensioner deployment will occur when contact is made.
  20. Disconnect the SIR deployment harness from the power source after the pretensioner deploys.
  21. Seat one banana plug into the other in order to short the deployment harness leads.
  22. If the pretensioner did not deploy, disconnect the adapter and discontinue the procedure. Contact the Technical Assistance Group. Otherwise, proceed to the following steps.
  23. Put on a pair of shop gloves.
  24. Disconnect the pigtail adapter from the pretensioner as soon as possible.
  25. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
  26. Dispose of the deployed pretensioner through normal refuse channels.
  27. Wash hands with a mild soap.

Scheme 9

Scheme 9: SIR System Overview
Scheme 9: SIR System Overview

The supplemental inflatable restraint (SIR) system supplements the protection offered by the occupant's seat belt system (2). The SIR system may contain several inflator modules located throughout the vehicle, i.e. steering wheel module (1) and instrument panel (I/P) module (1). Each inflator module has a deployment loop that is controlled by the sensing and diagnostic module (SDM) mounted inside the vehicle. The SDM determines the severity of a collision with the assistance of various sensor inputs. When the SDM detects a collision of sufficient force, it will process the information provided by the sensors to further support air bag deployment. The SDM performs continuous diagnostic monitoring of the SIR system electrical components. Upon detection of a circuit malfunction, the SDM will set a DTC and inform the driver by turning the AIR BAG indicator ON. The steering column (1) and knee bolsters (3) are designed to absorb energy and compress during frontal collisions in order to limit leg movement and decrease the chance of injury to the driver and passenger. After an air bag deployment, the SDM will send out a post-air message to the body control module (BCM). The BCM will unlock the doors and turn ON the interior lights 15 seconds after receipt of this message.

Frontal SIR System Description

The frontal SIR system consists of the following components

  1. Inflatable restraint sensing and diagnostic module (SDM)
  2. Inflatable restraint passenger presence system (PPS)
  3. Inflatable restraint passenger AIR BAG ON/OFF indicator
  4. AIR BAG indicator located in the instrument panel cluster (IPC)
  5. Inflatable restraint steering wheel module
  6. Inflatable restraint instrument panel (I/P) module
  7. Inflatable restraint seat position switch (SPS) (left/right)
  8. Inflatable restraint seat belt pretensioners (left/right)
  9. Inflatable restraint front end sensor (left/right)
  10. Inflatable restraint steering wheel module coil
  11. Driver and passenger knee bolsters
  12. Inflatable restraint wiring harnesses
  13. Steering wheel and column

A frontal collision of sufficient force will deploy the frontal air bags. The SDM contains a sensing device that converts vehicle velocity changes to an electrical signal. In the event of a frontal collision, the SDM receives a signal from the front end sensors which assists the SDM in determining the severity of some frontal collisions. The SDM contains a microprocessor that performs calculations using the measured accelerations. The SDM compares these calculations to a value stored in memory. When the generated calculations exceed the stored value, the SDM will cause current to flow through the frontal deployment loops deploying the frontal air bags. Once the air bags are inflated, they quickly deflate through the air bag vent holes. After the air bags have deployed, the SDM sets a DTC and requests the IPC to turn the AIR BAG indicator ON. The SDM, I/P module, steering wheel module, steering wheel module coil, and the connecting wires make up the frontal deployment loops. The SDM continuously monitors the deployment loops for malfunctions and turns the AIR BAG indicator ON if a fault is detected.

Inflatable Restraint Sensing and Diagnostic Module (SDM)

The sensing and diagnostic module (SDM) is a microprocessor and the control center for the supplemental inflatable restraint (SIR) system. This SDM has 2 fused power inputs: one fuse is for the battery voltage and the other fuse is for the ignition voltage. The SDM uses vehicle battery voltage as its main power input. The SDM then uses the vehicles serial data communication line and the ignition voltage logic input for enabling or disabling the SIR deployment loops. The SDM contains internal sensors along with several external sensors, if equipped, mounted at strategic locations on the vehicle. In the event of a collision, the SDM compares the signals from the internal and external sensors to a value stored in memory. When the generated signals exceed the stored value, the SDM will cause current to flow through the appropriate deployment loops to deploy the air bags or seat belt pretensioners. If the force of the impact is not sufficient to warrant inflator module deployment, the SDM may still deploy the seat belt pretensioners. The SDM records the SIR system status when a deployment occurs and turns the AIR BAG indicator located in the instrument panel cluster (IPC) ON. As soon as 3 distinct deployment commands, representing different events, have been issued to any belt pretensioner, or the SDM commands any front and side air bag to deploy once, the SDM shall be considered to not be reusable. The SDM performs continuous diagnostic monitoring of the SIR system electrical components and circuitry when the ignition is turned ON. If the SDM detects a malfunction, a DTC will be stored and the SDM will command the AIR BAG indicator ON, notifying the driver that a malfunction exists. In the event that ignition positive voltage is lost during a collision, the SDM maintains a 23-volt loop reserve (23 VLR) for deployment of the air bags. It is important when disabling the SIR system for servicing or rescue operations to allow the 23 VLR to dissipate, which could take up to 1 minute.

Inflatable Restraint Passenger Presence System

IMPORTANTThe passenger presence system (PPS), heated seat element, if equipped, and the seat bottom foam cushion is a calibrated unit and cannot be service separately. After repairing or replacing the PPS, the system must be rezeroed in order to function properly.

The PPS is used to monitor the weight of an occupant on the front outboard passenger seat and communicate the status to the sensing and diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel (I/P) module and the right front side impact module. The PPS consist of an electronic control module, silicone filled sensor pad, pressure sensor, seat belt tension retractor sensor, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the pressure sensor. The pressure sensor sends a voltage signal to the PPS module. If the pressure from the occupants weight is less than a specified value, the PPS module will send a suppress signal to the SDM to disable the I/P and the right front side impact modules. If the pressure from the occupants weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P and the right front side impact modules. The PPS module will notify the customer of the enable/disable status by turning ON one of the PASSENGER AIR BAG ON/OFF indicators located on the rearview mirror. The PPS monitors itself for faults and will set DTCs if a fault is detected. The PPS will also notify the SDM of a fault. The SDM will respond by requesting the instrument panel cluster (IPC) to turn the AIR BAG indicator ON.

Inflatable Restraint PASSENGER AIR BAG ON/OFF indicator

The PASSENGER AIR BAG ON/OFF indicators located in the rearview mirror is used to notify the driver and passenger when the I/P air bag is enable or disable.

AIR BAG Indicator

The AIR BAG indicator, located on the instrument panel cluster (IPC) is used to notify the driver of supplemental inflatable restraint (SIR) system malfunctions and to verify that the sensing and diagnostic module (SDM) is communicating with the IPC. When the ignition is turned ON, the SDM is supplied with ignition 1 voltage and requests the IPC to flash the AIR BAG indicator 7 times. While flashing the indicator, the SDM conducts test on all SIR system components and circuits. If no malfunctions are detected, the SDM will communicate with the IPC through the serial data communication circuit and request the IPC to turn the AIR BAG indicator OFF. The SDM provides continuous monitoring of the air bag circuits by conducting a sequence of checks. If a malfunction is detected, the SDM will store a DTC and request the IPC to turn the AIR BAG indicator ON. The presence of a SIR system malfunction could result in non-deployment of the air bags. The AIR BAG indicator will remain ON until the malfunction has been repaired.

Dual Stage Inflator Modules

Dual stage inflator modules contain a housing, inflatable air bag, 2 initiating devices, canister of gas generating material and, in some cases, stored compressed gas. The 2 initiators are part of the inflator module deployment loop. The inflator modules have 2 stages of deployment, which varies the amount of restraint to the occupant according to the collision severity. For moderate frontal collisions, the inflator modules deploy at less than full deployment which consists of stage 1 of the inflator module. For more severe frontal collisions, a full deployment is initiated which consists of stage 1 and stage 2 of the inflator module. When the vehicle is involved in a collision of sufficient force, the sensing and diagnostic module (SDM) will cause current to flow through the deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas and the release of compressed gas, if present. The gas produced from this reaction rapidly inflates the air bag. Once the air bag is inflated, it quickly deflates through the air bag vent holes.

Each dual stage inflator module is equipped with a shorting bar located on the connectors of the module. The shorting bar shorts the inflator module deployment loop circuitry to prevent unwanted deployment of the air bag when it is disconnected.

Inflatable Restraint Seat Position Switch (SPS)

The seat position switch (SPS) is used to determine the proximity of a front driver or passenger seat position with respect to the frontal air bag. The SPS interfaces with the sensing and diagnostic module (SDM). The state of the SPS allows the SDM to disable stage 2 of the frontal air bag for a front seat that is forward of a forward or rearward point in seat track travel. The SPS is a hall effect sensor that is mounted on the outboard seat track of both the driver and passenger seats. The seat track includes a metal bracket that shunts the SPS magnetic circuit creating 2 states of seat position. The shunted state represents a rearward seat position. The non-shunted state represents a forward position. The SPS provides 2 current ranges, one range for the shunted state and a second range for a non-shunted state. These 2 states are inputs to the SDM. State 1 (shunted) being the rearward threshold and state 2 (non-shunted) being the forward threshold. When the SDM receives input from a SPS that state 1 threshold is reached (seat is rearward), the SDM will not disable stage 2 deployment, if required by the deployment sensors. When state 2 threshold is reached (seat is forward), the SDM will disable stage 2 deployment on the side the seat is forward. The SDM monitors the SPS circuit and if a fault is detected the SDM will set codes B0083 or B0084 and defaults to disabling stage 2 frontal deployment. This will only default on the side of the vehicle the sensor has a fault.

Inflatable Restraint Seat Belt Pretensioner

The seat belt pretensioner modules contain a housing, an initiating device, canister of gas generating material. The initiator is part of the seat belt pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the SDM will cause current to flow through the deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas and the release of compressed gas, if present. The gas produced from this reaction rapidly shortens the seat belt buckle height.

Each seat belt pretensioner is equipped with a shorting bar located on the connector of the pretensioner. The shorting bar shorts the seat belt pretensioner deployment loop circuitry to prevent unwanted deployment of the pretensioner when servicing the seat belt pretensioner.

Inflatable Restraint Steering Wheel Module Coil

The steering wheel module coil is attached to the steering column and is located under the steering wheel. The steering wheel module coil consists of 2 or more current-carrying coils. The coils allow the rotation of the steering wheel while maintaining continuous electrical contact between the driver deployment loop and the steering wheel module. Four coil wires are used for the steering wheel module deployment loop. Additional coil wires are used for accessories attached to the steering wheel depending on the vehicle model. The steering wheel module coil connector is located near the base of the steering column. The connector contains a shorting bar that shorts the steering wheel module coil deployment loop circuitry to prevent unwanted deployment of the air bag when it is disconnected.

Inflatable Restraint Front End Sensors

The inflatable restraint front end sensors, also known as electronic frontal sensors (EFS), are equipped on vehicles to supplement the supplement inflatable restraint (SIR) system performance. The front end sensors are electronic and are not part of the deployment loops, but instead provide inputs to the sensing and diagnostic module (SDM). The front end sensors can assist in determining the severity of some frontal collisions. The SDM uses the input from the front end sensors to assist in determining the severity of a frontal collision further supporting air bag deployment. If the SDM determines a deployment is warranted, the SDM will cause current to flow through the deployment loops deploying the frontal air bags.

Driver and Passenger Knee Bolsters

The knee bolsters are designed to help restrain the lower torsos of front seat occupants by absorbing energy through the front seat occupants' upper legs. In a frontal collision, the front seat occupants legs may come in contact with the knee bolsters. The knee bolsters are designed to crush or deform absorbing some of the impact, which helps to reduce bodily injuries. The driver and passenger knee bolsters are located in the lower part of the instrument panel and must be inspected for damage after a collision.

Inflatable Restraint Wiring Harnesses

The inflatable restraint wiring harnesses connect the sensing and diagnostic module (SDM), inflator modules, front end sensors, side impact sensors, seat position switches (SPS), and the serial data communication circuit together using weather pack connectors. Only the supplemental inflatable restraint (SIR) deployment loop connectors are yellow in color for easy identification. When repairing SIR system wiring harnesses, follow the proper testing and wiring repair procedures outlined in this manual.

Steering Wheel and Column

The steering wheel and column are designed to absorb energy when driver contact is made with the steering wheel or inflated air bag. In a frontal collision, the driver may contact the steering wheel directly or load the steering wheel and column through the inflated air bag. When the driver applies load to the air bag or steering wheel, the column will compress downward absorbing some of the impact, helping to reduce bodily injuries to the driver. The steering wheel and column must be inspected for damage after a collision.

Side SIR System Description

The side supplemental inflatable restraint (SIR) system consists of the following components

  1. AIR BAG indicator located in the instrument panel cluster (IPC)
  2. Inflatable restraint sensing and diagnostic module (SDM)
  3. Inflatable restraint side impact modules (LF/RF)
  4. Inflatable restraint side impact sensors (SIS) (left/right)
  5. Inflatable restraint wiring harnesses

The side impact modules are located in the outside portion of the front seat backs. The side impact modules contain a housing, inflatable air bag, initiating device, and a canister of gas generating material. The initiator is part of the side impact deployment loop. When a side impact of sufficient force occurs, the SIS detects the impact and sends a signal to the SDM. The SDM compares the signal received from the SIS to a value stored in memory. When the generated signal exceeds the stored value, the SDM will cause current to flow through the side deployment loop deploying the side air bags. The SDM, side impact modules, and the connecting wires make up the side deployment loops. The SDM continuously monitors the deployment loops for malfunctions and turns the AIR BAG indicator ON if a fault is present.

Each side impact module is equipped with a shorting bar located on the connector of the module. The shorting bar shorts the side impact modules deployment loop circuitry to prevent unwanted deployment of the air bag when servicing the inflator module.

Inflatable Restraint Side Impact Sensor (SIS)

The side impact sensor (SIS) contains a sensing device which monitors vehicle acceleration and velocity changes to detect side collisions that are severe enough to warrant air bag deployment. The SIS is not part of the deployment loop, but instead provides an input to the sensing and diagnostic module (SDM). The SDM contains a microprocessor that performs calculations using the measured accelerations and compares these calculations to a value stored in memory. When the generated calculations exceed the stored value, the SDM will cause current to flow through the deployment loops deploying the side air bags.

Illustration Tool Number/Description J 38715-A SIR Driver and Passenger Load Tool J 38826 SIR Deployment Harness J 39401-B SIR Deployment Fixture J 42640 Steering Column Anti-Rotation Pine J 44298 Driver Air Bag Removal Tool

Scheme 10

Scheme 10: Special Tools
Scheme 10: Special Tools

See also:
• Diagnostic System Check - Vehicle
• Diagnostic Trouble Code (DTC) List - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Seat Belt Retractor Replacement - Right Front (Convertible)
• Checking Aftermarket Accessories
• Battery Negative Cable Disconnection and Connection (LS7 or LS9)
• Fastener Caution
• SIR Inflator Module Handling and Storage Warning
• Front Side Door Trim Panel Replacement - Left Side
• SIR Warning
• Instrument Panel Accessory Trim Plate Replacement
• Steering Column Trim Cover Replacement (Manual)
• Driver or Passenger Seat Replacement
• Steering Column Accident Damage Inspection (Manual)
• Steering Column Accident Damage Inspection (Telescoping)
• Repairs and Inspections Required After a Collision
• SIR Inflator Module Disposal Warning
• SIR Deployed Inflator Modules Are Hot Warning
• SIR Inflatable Module Deployment Outside Vehicle Warning
• SIR Disabling and Enabling
• DTC B0012-B0019, B0027-B0030, B0039-B0041, B0045, B0046, B0056-B0076, B0085-B0089, B0106-B0114, B0118-B0124, or B3850-B3854
• Inflatable Restraint Steering Wheel Module Coil Centering
• SIR Identification Views