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Supplemental Inflatable Restraint System Chevrolet Colorado I

Airbag 8 illustrations ~26582 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Front Seat Belt Retractor/Pretensioner Assembly Bolts52.5 N.m39 lb ft
Passenger Supplemental Inflatable Restraint (PSIR) Bracket Fasteners9 N.m79 lb in
Passenger Supplemental Inflatable Restraint (PSIR) FastenersFully Driven, seated and not strippedFully Driven, seated and not stripped
SIR Roof Rail Air Bag Bolts9 N.m79 lb in
SIR Seat Position Sensor Nuts24 N.m18 lb ft
SIR Sensing and Diagnostic Module (SDM) Nuts9 N.m79 lb in
SIR Side Impact Sensor Screws9 N.m79 lb in
Supplemental Inflatable Restraint (SIR) Front End Discriminating Sensor Bolts9 N.m79 lb in

Fastener Tightening Specifications

Scheme 1

Scheme 1: SIR Schematics
Scheme 1: SIR Schematics

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4
Scheme 4

SIR Identification Views

The SIR Identification Views shown below illustrate the approximate location of all SIR components available for the vehicle. Refer to SIR Disabling and Enabling .

Scheme 5

Scheme 5: SIR Identification Views
Scheme 5: SIR Identification Views
CalloutComponent Name
1Inflatable Restraint Front End Sensor-Right-Located on the front of the vehicle in the engine compartment
2Accessory Switch-Located in the Center of the I/P
3Inflatable Restraint I/P Module-Located at the top right under the instrument panel
4Inflatable Restraint Side Impact Sensor (SIS)-Right-Located under right front door trim near the lower rear of door frame
5Inflatable Restraint Roof Rail Module-Right-Located in the headliner along roof rail
6Seat Belt Retractor Pretensioner-Right-Located on the floor next to the right front seat
7Inflatable Restraint Seat Position Switch-Right-Located on the side of the right front seat
8Inflatable Restraint Sensing and Diagnostic Module (SDM)-Located under center floor console
9Seat Belt Retractor Pretensioner-Left-Located on the floor next to the left front seat
10Inflatable Restraint Seat Position Switch-Left-Located on the side of the left front seat
11Inflatable Restraint Side Roof Rail Module-Left-Located in the headliner along the roof rail
12Inflatable Restraint Side Impact Sensor (SIS)-Left-Located under left front door trim near the lower rear of door frame
13Inflatable Restraint Steering Wheel Module-Located on the steering wheel
14Battery and Underhood Fuse Block-SIR Fuse-Located in engine compartment on left side
15Inflatable Restraint Front End Sensor-Left-Located on the front of the vehicle in the engine compartment

DIAGNOSTIC CODE INDEX

DTCDescription
DTC B0012, B0013, B0014, B0016, B0017, or B0018B0012: 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
DTC B0022, B0024, B0026, B0042, B0043, or B0044B0022: Driver Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low B0024: Driver Frontal Deployment Loop (Single Stage or Stage 1) Voltage Out of Range B0026: Driver Frontal Deployment Loop (Single Stage or 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 B0057, B0058, or B0059B0057: Right Front/Passenger Pretensioner Deployment Loop Resistance Low B0058: Right Front/Passenger Pretensioner Deployment Loop Open B0059: Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range
DTC B0061, B0062, or B0068B0061: Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Resistance Low B0062: Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Open B0068: Left Front/Driver Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range
DTC B0064, B0065, or B0066B0064: Left Front/Driver Pretensioner Deployment Loop Resistance Low B0065: Left Front/Driver Pretensioner Deployment Loop Open B0066: Left Front/Driver Pretensioner Deployment Loop Voltage Out of Range
DTC B0069, B0070, or B0071B0069: Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Resistance Low B0070: Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Open B0071: Right Front/Passenger Roof Rail/Head Curtain Bag Deployment Loop Voltage Out of Range
DTC B0077, B0078, B0079, B0080, B0081, or B0082B0077: Left Front/Driver Side Impact Sensor (SIS) Performance B0078: Right Front/Passenger Side Impact Sensor (SIS) Performance B0079: Incorrect Left Front/Driver Side Impact Sensor (SIS) Installed B0080: Discard Left Front/Driver Side Impact Sensor (SIS) B0081: Incorrect Right Front/Passenger Side Impact Sensor (SIS) Installed B0082: Discard Right Front/Passenger Side Impact Sensor (SIS)
DTC B0083 or B0084B0083: Right Front/Passenger Seat Position Sensor Circuit B0084: Left Front/Driver 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
DTC B1530B1530: Discard Passenger Presence System 1
DTC U1241Will set when the Tech 2 is used to flash DTCs from the PPS or after the PPS has been rezeroed. DTC U1241 does not indicate a system malfunction and will not cause any warning indicators to illuminate. When DTC U1241 sets, cycle the ignition and use the scan tool to clear the code, no further diagnosis is necessary. For more detailed information concerning the PPS, refer to SIR System Description and Operation . For more detailed information concerning PPS flash code and rezeroing procedures, refer to Passenger Presence System Flash Code Procedures and Passenger Presence System Programming and Setup .

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - SIR

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

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

The use of Diagnostic System Check - Vehicle 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, communicate with the SDM that a malfunction has occurred, and request the SDM to disable the instrument panel (I/P) module deployment loop. The SDM will respond by disabling the I/P module deployment loop, setting either DTC B0092 or B0098 and commanding the AIR BAG indicator ON. The SDM sets either DTC B0092 or B0098 to notify the driver of a PPS malfunction. The DTCs that the PPS set are non-class 2 and have to be flashed through the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel center stack. 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 passenger presence system (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 located on the instrument panel 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, the PPS will flash all current and history DTCs that are stored. After all DTCs have been flashed, to determine if the DTCs are current or history, the PPS will reflash the DTCs that are stored as current only. Any DTC that is not reflashed is stored as a history DTC.
  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/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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

DTC 023

Circuit/System Description

The inflatable restraint seat belt tension sensor is used to enhance the passenger presence system (PPS) when an infant car seat is properly restrained on the front outboard passenger seat. The seat belt tension sensor is a 3-wire potentiometer mounted on the lower seat belt anchor and provides an input to the PPS module. When an infant car seat is properly restrained on the front passenger seat, the seat belt is tightly secured through the infant car seat. The seat belt pulls on the tension sensor and changes the voltage signal to the PPS module. The PPS module uses the voltage signal to help determine if a tightly belted infant car seat is installed. The PPS uses the inputs from the seat belt tension sensor and the PPS pressure sensor to determine if the instrument panel (I/P) module should be suppressed or enabled. The PPS monitors the seat belt tension sensor circuits and sets DTC 023 if a fault is detected.

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

  1. The PPS detects the voltage at the passenger seat belt tension 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 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 sensor low reference is 25 mA or greater for 500 milliseconds.

Action Taken When the DTC Sets

  1. The SDM disables the instrument panel (I/P) module deployment loop.
  2. The SDM commands the AIR BAG indicator ON.

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

The following can cause an intermittent condition

  1. A short between the passenger seat belt tension sensor signal, 5-volt reference, and low reference circuits
  2. An open or high resistance between the passenger seat belt tension sensor signal, 5-volt reference, and low reference circuits
  3. Inspect the passenger seat belt tension 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/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing

IMPORTANTWhen removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector: Seat belt buckle - passenger PPS module Seat belt buckle - passenger wiring harness connector PPS 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 X2 and ground. If less that the specified range, test the voltage reference circuit for 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 AIRBAG fuse. Test for less than 2.0 ohms between low reference terminal B X2 and ground. If greater than the specified range, test the low reference circuit for 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 X2 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 X2 and ground. If greater than the specified range, test the signal circuit for a short to voltage.
  7. Test for less than 1.0 ohm between the signal circuit terminal C X2 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 buckle.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Front Seat Belt Buckle Replacement»(/chevrolet/colorado/i-2004-2012/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 turning on 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 turn the AIR BAG indicator ON.

Ignition 1 voltage is within the normal operating voltage range.

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

The following can cause an intermittent condition

  1. A short in the ignition 1 voltage circuit between the PPS module and the body relay block
  2. An open or high resistance in the ignition 1 voltage circuit between the PPS module and the body relay block

The PPS will set DTC 024 when the ignition voltage has fallen below 8 volts. The PPS will set DTC 024 as a history code only. This is a normal condition for DTC 024 and it should be diagnosed as a current DTC.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Ignition OFF. Inspect the PPS and main seat harness connectors for corrosion or damage. If any of the above conditions are found, make the appropriate repair.
  2. Test the PPS ground circuit for an open/high resistance. If any of the above conditions are found, make the appropriate repair.
  3. Test the PPS ignition 1 voltage circuit for a short to ground or an open/high resistance. If any of the above conditions are found, make the appropriate repair.
  4. Reconnect all components, clear codes and recheck for DTC 024. Refer to «Passenger Presence System Flash Code Procedures»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) . If DTC 024 resets, replace and rezero the PPS. After replacement and rezeroing of the PPS are completed, perform the repair verification.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 turning on 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 DTC B0092 and requesting the instrument panel cluster (IPC) to turn the AIR BAG indicator ON. The PPS will set DTC 063 as an indication that the PPS is out of calibration. The PPS is not capable of being calibrated at the service level, the PPS must be replaced.

Ignition 1 voltage is within the normal operating voltage range.

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 commands the AIR BAG indicator ON.

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 diagnostic table below.

  1. Refer to «Passenger Presence System Flash Code Procedures»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) for displaying flash codes.
  2. The presence of current or history DTC while attempting to rezero the PPS will cause the PPS module to set DTC 063. Verify that all SIR and PPS DTC have been cleared before rezeroing the PPS.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Ignition OFF. Clear codes and rezero the PPS system.

  1. If DTC 063 resets, replace and rezero the PPS. Refer to repair instructions.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 turning on 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 turn the AIR BAG indicator ON.

Ignition 1 voltage is within the normal operating voltage range.

  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 commands the AIR BAG indicator ON.
  1. The condition 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.

DTC B0092 or B0098 will set if the PPS has a current malfunction and has set DTC 064. The SDM will set DTC B0092 or B0098 as current and command the AIR BAG indictor ON. This is done to notify the driver of any PPS malfunctions. When DTC B0092 or B0098 are present it is important to check the PPS for any current DTCs. Refer to Passenger Presence System Flash Code Procedures .

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Ignition ON. With the scan tool check for DTC 064 as a current DTC. Refer to «Passenger Presence System Flash Code Procedures»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) . If DTC 064 is NOT a current DTC, rezero the PPS system.
  2. Ignition ON. If DTC 064 is a current DTC, check for DTC B0098 as a current DTC. If DTC B0098 is a current DTC, refer to «DTC B0098»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. Ignition OFF. Inspect the PPS module, SDM and main seat harness connectors for corrosion or damage. If any of the above conditions are found, make the appropriate repair.
  4. Reconnect all components, and test the PPS class 2 serial data circuit for a short to voltage. If any of the above conditions are found, make the appropriate repair. Reconnect all components and rezero the PPS.
  5. Replace the PPS. After replacement and rezeroing of the PPS are completed, verify that DTC 064 does not reset. Perform the repair verification.
  6. If DTC 064 resets, replace the SDM. After replacement and setup of the SDM is completed, rezero the PPS. Perform the repair verification.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 turning on 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 turn the AIR BAG indicator ON.

Ignition 1 voltage is within the normal operating voltage range.

  1. The PPS detects the voltage at PPS sensor signal is less than 0.5 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 commands the AIR BAG indicator ON.
  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.

Refer to Passenger Presence System Flash Code Procedures for displaying flash codes.

The following can cause an intermittent condition

  1. A short between the PPS sensor signal, 5-volt reference, and low reference circuits.
  2. An open or high resistance between the PPS sensor signal, 5-volt reference, and low reference circuits.
  3. Inspect the PPS sensor signal, 5-volt reference, and low reference circuits carefully for cutting and/or chafing.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Ignition OFF. Inspect the PPS module and PPS pressure sensor harness connectors for corrosion or damage. If any of the above conditions are found, make the appropriate repair.
  2. Reconnect all components, and test the PPS sensor circuits for a short to voltage, short to ground or open/high resistance. If any of the above conditions are found, make the appropriate repair.
  3. Reconnect all components and check for DTC 065 as current. If DTC 065 is not current, rezero the PPS.
  4. Replace and rezero the PPS. After replacement and rezeroing of the PPS are completed, perform the repair verification.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
I/P Module Stage 1 High CircuitB0018B0018B0017B0018B0016
I/P Module Stage 1 Low CircuitB0018B0018B0017B0018B0016
I/P Module Stage 2 High CircuitB0014B0014B0013B0014B0012
I/P Module Stage 2 Low CircuitB0014B0014B0013B0014B0012

DTC B0012, B0013, B0014, B0016, B0017, or B0018

The passenger deployment loop consists of a dual stage inflatable restraint instrument panel (I/P) module. The I/P module high circuits, and the I/P module low circuits exist for both stages 1 and 2. There are 2 shorting bars used within the I/P module connector. These shorting bars short together the I/P module stage 1 high circuits, and low circuits, and the I/P module stage 2 high circuits and low circuits when the connector is disconnected. This prevents unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop. This flow of current will deploy the I/P module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts-to-ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

Ignition voltage is between 9-16 volts.

B0012 stage 2 or B0016 stage 1

The I/P module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0013 stage 2 or B0017 stage 1

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

B0014 stage 2 or B0018 stage 1

  1. The I/P module stage 1 or stage 2 high and/or low circuits is short to ground or short to voltage for 500 milliseconds.
  2. The I/P module stage 1 or stage 2 high circuit is less than 2.4 volts and I/P module stage 1 or stage 2 deployment loop resistance is less than 6 ohms for 500 milliseconds.
  1. The SDM commands the AIR BAG indicator ON.
  2. The SIR system is disabled and no deployments are allowed.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

If there is more than one DTC set diagnose the open DTC first. The following are possible causes of the malfunction

  1. A short between the I/P module stage 1 or stage 2, high and low circuits
  2. An open or a high resistance in the I/P module stage 1 or stage 2, high or low circuits
  3. A short to ground or a short to voltage in the I/P module stage 1 or stage 2, high or low circuits
  4. A malfunctioning I/P module connector
  5. A malfunctioning SDM connector
  6. A malfunctioning I/P module
  7. A malfunctioning SDM

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

  1. EL 38715-125 Load Tool Adapter
  2. J 38715-A Driver/Passenger Load tool. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  1. With the ignition OFF, disconnect I/P module in-line connector.
  2. Inspect the component and wiring harness sides of the in-line connector for the I/P module for damage or corrosion. If the in-line connector for the I/P module is damaged, the I/P module must be replaced. If the I/P module wiring harness side connector is damaged, replace the harness side of the connector.
  3. Use EL 38715-125 adapter to connect the J 38715-A SIR Driver/Passenger Load Tool to the harness side of the I/P module in-line wiring harness connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Use the BASE of COLUMN and PASSENGER INFLATOR connectors located on the load tool.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0012, B0013, B0014, B0016, B0017, or B0018 are set in history. If DTC B0012, B0013, B0014, B0016, B0017, or B0018 is history replace the I/P module.
  5. With the ignition OFF, disconnect and remove the J 38715-A and adapter. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. Remove the inflatable restraint sensing and diagnostic module (SDM) connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the I/P module stage 1 or stage 2 high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  7. Test the high and low circuits between the SDM and I/P module for a short to voltage, short to ground, or open/low resistance. If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Inflatable Restraint Instrument Panel Module Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 CircuitB0024B0024B0026B0024B0022
Steering Wheel Module Stage 1 Low CircuitB0024B0024B0026B0024B0022
Steering Wheel Module Stage 2 High CircuitB0043B0043B0044B0043B0042
Steering Wheel Module Stage 2 Low CircuitB0043B0043B0044B0043B0042

DTC B0022, B0024, B0026, B0042, B0043, or B0044

The driver deployment loop consists of the following components

  1. A dual-stage inflatable restraint steering wheel module
  2. The inflatable restraint steering wheel module coil
  3. The steering wheel module high circuits for both stages 1 and 2
  4. The steering wheel module low circuits for both stages 1 and 2

There are 2 shorting bars used within the steering wheel module coil connector. These shorting bars short together both stages of the steering wheel module high circuit, and the steering wheel module low circuit when the connector is disconnected. This helps prevent unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop. This flow of current will 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. If a malfunction is detected, a DTC will be stored in memory.

Ignition voltage is between 9-16 volts.

B0022 Stage 1 or B0042 Stage 2

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

B0024 Stage 1 or B0043 Stage 2

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

B0026 Stage 1 or B0044 Stage 2

  1. The driver module stage 1 or stage 2 high circuit is less than 2.4 volts and the driver module stage 1 or stage 2 deployment loop is more than 6 ohms for 500 milliseconds.
  2. The driver module stage 1 or stage 2 deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.
  1. The SDM commands the AIR BAG indicator ON.
  2. The SIR system is disabled and no deployments are allowed.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

If there is more than one DTC set, diagnose the open DTC first. The following conditions are possible causes of the malfunction

  1. A short between the steering wheel module stage 1 or stage 2, high and low circuits
  2. An open or a high resistance in the steering wheel module stage 1 or stage 2, high or low circuits
  3. A short-to-ground, or a short-to-voltage in the steering wheel module stage 1 or stage 2, high circuits or low circuits
  4. A malfunctioning steering wheel module coil connector
  5. A malfunctioning SDM connector
  6. A malfunctioning steering wheel module
  7. A malfunctioning steering wheel module coil
  8. A malfunctioning SDM

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

  1. J 38715-A SIR Driver/Passenger Load Tool. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. J 38715-80 Load Tool Adapter
  3. J 38715-120 Load Tool Adapter
  1. With the ignition OFF, disconnect the steering wheel module coil inline connector located at the base of column. Note: Refer to «Inflatable Restraint Steering Wheel Module Coil Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) for location of connector.
  2. Inspect the component and wiring harness sides of the inline connector for damage or corrosion. If the inline connector for the steering wheel module coil is damaged, the steering wheel module coil must be replaced. If the steering wheel module coil wiring harness side connector is damaged, replace the harness side of the connector.
  3. Use J 38715-80 adapter to connect the J 38715-A to the harness side of the steering wheel module coil inline wiring harness connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Use the BASE of COLUMN and PASSENGER INFLATOR connectors located on the load tool.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTCs B0022, B0024, B0026, B0042, B0043, or B0044 are set as current or in history.
  5. With the ignition OFF, disconnect and remove the J 38715-A and adapter. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. If DTC B0022, B0024, B0026, B0042, B0043, or B0044 is history, reconnect the steering wheel module coil wiring harness. Use J 38715-120 adapter to connect the J 38715-A to the harness side of the steering wheel module connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . If DTC B0022, B0024, B0026, B0042, B0043, or B0044 is set as current, replace the steering wheel module coil. If DTC B0022, B0024, B0026, B0042, B0043, or B0044 are set in history, replace the steering wheel module.
  7. If DTC B0022, B0024, B0026, B0042, B0043, or B0044 is current, a problem exists with the SDM and or the wiring harness. Remove the SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the steering wheel module coil stage 1 or stage 2 high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  8. Test the high and low circuits between the SDM and steering wheel module coil for a short to voltage, short to ground, or open/low resistance. If circuits test good, then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Steering Wheel Module Coil Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Inflatable Restraint Steering Wheel Module Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 a sensing device that converts changes in vehicle velocity to an electrical signal. The SDM compares this signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values 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 air bags and causing DTC B0051 to set.

The SDM must be powered up.

Ignition voltage must be present and the SDM must have commanded an air bag deployment with no faults present.

  1. The SDM commands the AIR BAG indicator ON.
  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 in the circuit/system testing.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. If there are signs of an air bag deployment inspect the vehicle for signs of impact or collision. Replace all components as required after an accident.
  2. Replace the inflatable restraint SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 a sensing device that converts changes in vehicle velocity to an electrical signal. The SDM compares this signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values 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 air bags. DTC B0053 will set instead of DTC B0051 when a deployment occurs while an inflator circuit fault is present that may result in a non-deployment situation in one or more of the inflator modules.

The SDM must be powered up.

Ignition voltage must be present and the SDM must have commanded an air bag deployment with faults present.

  1. The SDM commands the AIR BAG indicator.
  2. The SDM records crash data.

DTC B0053 is a latched code. A latched code cannot be cleared. Replace the SDM after following the instructions in the circuit/system testing.

When DTC B0053 is accompanied by additional DTCs (other than DTC B0051), repair the malfunction causing the other DTCs before replacing the SDM.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. If there are signs of an air bag deployment inspect the vehicle for signs of impact or collision. Replace all components as required after an accident.
  2. Replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 Belt Pretensioner - RF High CircuitB0059B0059B0058B0059B0057
Seat Belt Pretensioner - RF Low CircuitB0059B0059B0058B0059B0057

DTC B0057, B0058, or B0059

The passenger seat belt pretensioner deployment loop consists of a seat belt pretensioner - RF and the seat belt pretensioner - RF high and low circuits. A shorting bar used within the seat belt pretensioner connector shorts together both the seat belt pretensioner high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the pretensioner during servicing. 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 seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

Ignition voltage is between 9-16 volts.

B0057

DTC B0057 will set when the seat belt pretensioner-RF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0058

DTC B0058 will set when one of the following conditions occurs

  1. Seat belt pretensioner - RF high circuit is less than 2.4 volts and the seat belt pretensioner - RF deployment loop is greater than 6 ohms for 500 milliseconds.
  2. Seat belt pretensioner - RF deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.

B0059

DTC B0059 when one of the following conditions occur

  1. Seat belt pretensioner - RF high or low circuits is short to ground or short to voltage for 500 milliseconds.
  2. Seat belt pretensioner - RF high circuit is less than 2.4 volts and seat belt pretensioner - RF deployment loop resistance is less than 6 ohms for 500 milliseconds.
  1. The SDM commands the AIR BAG indicator ON.
  2. The SIR system is disabled and no deployments are allowed.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

If there is more than one DTC set, diagnose the open DTC first. The following are possible causes of the malfunction

  1. A short between the seat belt pretensioner - RF high and low circuits
  2. An open or a high resistance in the seat belt pretensioner - RF high or low circuits
  3. A short to ground or a short to voltage in the seat belt pretensioner - RF high or low circuits
  4. The seat belt pretensioner - RF connector
  5. The SDM connector
  6. A malfunctioning seat belt pretensioner
  7. A malfunctioning SDM

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

  1. J 38715-A SIR Driver/Passenger Load Tool. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. J 38715-50 Load Tool Adapter
  1. With the ignition OFF, disconnect seat belt pretensioner connector.
  2. Inspect the component and wiring harness sides of connector for the seat belt pretensioner for damage or corrosion. If the connector for the seat belt pretensioner is damaged, the seat belt pretensioner must be replaced. If the seat belt pretensioner wiring harness side connector is damaged, replace the connector.
  3. Use J 38715-50 adapter to connect the J 38715-A SIR Driver/Passenger Load Tool to the harness side of the seat belt pretensioner wiring harness connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Use the PASSENGER INFLATOR connector located on the load tool.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0057, B0058, or B0059 are set in history. If DTC B0057, B0058, or B0059 is history replace the seat belt pretensioner.
  5. With the ignition OFF, disconnect and remove the J 38715-A and adapter. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. Remove the SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the seat belt pretensioner high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  7. Test the high and low circuits between the SDM and seat belt pretensioner for a short to voltage, short to ground, or open/low resistance. If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Retractor Pretensioner Replacement - Front (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Roof Rail Module - Left High CircuitB0068B0068B0062B0068B0061
Roof Rail Module - Left Low CircuitB0068B0068B0062B0068B0061

DTC B0061, B0062, or B0068

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - left and the roof rail module high and low circuits. A shorting bar used within the roof rail module connector shorts together both the roof rail module high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. 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 roof rail module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

Ignition voltage is between 9-16 volts.

B0061

DTC B0061 will set when the roof rail module-left deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0062

DTC B0062 will set when one of the following conditions occurs

  1. Roof rail module-left high circuit is less than 2.4 volts and the roof rail module-left deployment loop is greater than 6 ohms for 500 milliseconds.
  2. Roof rail module-left deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.

B0068

DTC B0068 when one of the following conditions occur

  1. Roof rail module-left high or low circuits are short to ground or short to voltage for 500 milliseconds.
  2. Roof rail module-left high circuit is less than 2.4 volts and roof rail module-left deployment loop resistance is less than 6 ohms for 500 milliseconds.
  1. The SDM commands the AIR BAG indicator ON.
  2. The SIR system is disabled and no deployments are allowed.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

If there is more than one DTC set diagnose the open DTC first. The following are possible causes of the malfunction

  1. A short between the roof rail module-left high and low circuits
  2. An open or a high resistance in the roof rail module-left high or low circuits
  3. A short to ground or a short to voltage in the roof rail module-left high or low circuits
  4. The roof rail module-left connector
  5. The SDM connector
  6. A malfunctioning roof rail module
  7. A malfunctioning SDM

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

  1. EL 38715-125 Load Tool Adapter
  2. J 38715-A SIR Driver/Passenger Load Tool. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  1. With the ignition OFF, disconnect roof rail module-left connector.
  2. Inspect the component and wiring harness sides of connector for the roof rail module-left for damage or corrosion. If the connector for the roof rail module - left is damaged, the roof rail module - left must be replaced. If the roof rail module - left wiring harness side connector is damaged, replace the connector.
  3. Use EL 38715-125 adapter to connect the J 38715-A SIR Driver/Passenger Load Tool to the harness side of the roof rail module-left wiring harness connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Use the PASSENGER INFLATOR connector located on the load tool.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0061, B0062, or B0068 are set in history. If DTC B0061, B0062, or B0068 is history replace the roof rail module - left.
  5. With the ignition OFF, disconnect and remove the J 38715-A and adapter. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. Remove the SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the roof rail module-left high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  7. Test the high and low circuits between the SDM and roof rail module - left for a short to voltage, short to ground, or open/low resistance. If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Roof Side Rail Module Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Inflatable Restraint Roof Side Rail Module Replacement - Front (Regular and Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 Belt Pretensioner - LF High CircuitB0066B0066B0065B0066B0064
Seat Belt Pretensioner - LF Low CircuitB0066B0066B0065B0066B0064

DTC B0064, B0065, or B0066

The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF and the seat belt pretensioner - LF high and low circuits. A shorting bar used within the seat belt pretensioner connector shorts together both the seat belt pretensioner high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the pretensioner during servicing. 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 seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

Ignition voltage is between 9-16 volts.

B0064

DTC B0064 will set when the seat belt pretensioner - LF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0065

DTC B0065 will set when one of the following conditions occurs

  1. Seat belt pretensioner - LF high circuit is less than 2.4 volts and the seat belt pretensioner - LF deployment loop is greater than 6 ohms for 500 milliseconds.
  2. Seat belt pretensioner - LF deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.

B0066

DTC B0066 when one of the following conditions occur

  1. Seat belt pretensioner - LF high or low circuits is short to ground or short to voltage for 500 milliseconds.
  2. Seat belt pretensioner - LF high circuit is less than 2.4 volts and seat belt pretensioner - LF deployment loop resistance is less than 6 ohms for 500 milliseconds.
  1. The SDM commands the AIR BAG indicator ON.
  2. The SIR system is disabled and no deployments are allowed.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

If there is more than one DTC set diagnose the open DTC first. The following are possible causes of the malfunction

  1. A short between the seat belt pretensioner - LF high and low circuits
  2. An open or a high resistance in the seat belt pretensioner - LF high or low circuits
  3. A short to ground or a short to voltage in the seat belt pretensioner - LF high or low circuits
  4. The seat belt pretensioner - LF connector
  5. The SDM connector
  6. A malfunctioning seat belt pretensioner
  7. A malfunctioning SDM

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

  1. J 38715-A SIR Driver/Passenger Load Tool. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. J 38715-50 Load Tool Adapter
  1. With the ignition OFF, disconnect seat belt pretensioner connector.
  2. Inspect the component and wiring harness sides of connector for the seat belt pretensioner for damage or corrosion. If the connector for the seat belt pretensioner is damaged, the seat belt pretensioner must be replaced. If the seat belt pretensioner wiring harness side connector is damaged, replace the connector.
  3. Use J 38715-50 adapter to connect the J 38715-A SIR Driver/Passenger Load Tool to the harness side of the seat belt pretensioner wiring harness connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Use the PASSENGER INFLATOR connector located on the load tool.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0064, B0065, or B0066 are set in history. If DTC B0064, B0065, or B0066 is history replace the seat belt pretensioner.
  5. With the ignition OFF, disconnect and remove the J 38715-A and adapter. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. Remove the inflatable restraint sensing and diagnostic module (SDM) connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the seat belt pretensioner high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  7. Test the high and low circuits between the SDM and seat belt pretensioner for a short to voltage, short to ground, or open/low resistance. If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Retractor Pretensioner Replacement - Front (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Roof Rail Module - Right High CircuitB0071B0071B0070B0071B0069
Roof Rail Module - Right Low CircuitB0071B0071B0070B0071B0069

DTC B0069, B0070, or B0071

The driver roof rail deployment loop consists of an inflatable restraint roof rail module - right and the roof rail module high and low circuits. A shorting bar used within the roof rail module connector shorts together both the roof rail module high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. 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 roof rail module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

Ignition voltage is between 9-16 volts.

B0069

DTC B0069 will set when the roof rail module-right deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0070

DTC B0070 will set when one of the following conditions occurs

  1. Roof rail module - right high circuit is less than 2.4 volts and the roof rail module-right deployment loop is greater than 6 ohms for 500 milliseconds.
  2. Roof rail module - right deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.

B0071

DTC B0071 when one of the following conditions occur

  1. Roof rail module - right high or low circuits are short to ground or short to voltage for 500 milliseconds.
  2. Roof rail module - right high circuit is less than 2.4 volts and roof rail module - right deployment loop resistance is less than 6 ohms for 500 milliseconds.
  1. The SDM commands the AIR BAG indicator ON.
  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 DTC function is used.
  2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

If there is more than one DTC set diagnose the open DTC first. The following are possible causes of the malfunction

  1. A short between the roof rail module - right high and low circuits
  2. An open or a high resistance in the roof rail module - right high or low circuits
  3. A short to ground or a short to voltage in the roof rail module - right high or low circuits
  4. The roof rail module- right connector
  5. The SDM connector
  6. A malfunctioning roof rail module
  7. A malfunctioning SDM

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

  1. EL 38715-125 Load Tool Adapter
  2. J 38715-A SIR Driver/Passenger Load Tool. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  1. With the ignition OFF, disconnect roof rail module-right connector.
  2. Inspect the component and wiring harness sides of connector for the roof rail module - right for damage or corrosion. If the connector for the roof rail module-right is damaged, the roof rail module - right must be replaced. If the roof rail module-right wiring harness side connector is damaged, replace the connector.
  3. Use EL 38715-125 adapter to connect the J 38715-A SIR Driver/Passenger Load Tool to the harness side of the roof rail module-right wiring harness connector. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Use the PASSENGER INFLATOR connector located on the load tool.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0069, B0070, or B0071 are set in history. If DTC B0069, B0070, or B0071 is history replace the roof rail module-right.
  5. With the ignition OFF, disconnect and remove the J 38715-A and adapter. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. Remove the inflatable restraint sensing and diagnostic module (SDM) connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the roof rail module-right high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  7. Test the high and low circuits between the SDM and roof rail module-right for a short to voltage, short to ground, or open/low resistance. If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Roof Side Rail Module Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Inflatable Restraint Roof Side Rail Module Replacement - Front (Regular and Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 Signal Circuit Left/RightB0077, B0078B0077, B0078B0077, B0078B0077, B0078B0077, B0078

DTC B0077, B0078, B0079, B0080, B0081, or B0082

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, 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. If the fault is still present, the SDM will set a diagnostic trouble code (DTC).

Ignition voltage is between 9-16 volts.

B0077 and B0078

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

B0079 and B0081

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

B0080 and B0082

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

  1. The SDM commands the AIR BAG indicator ON.
  2. The SDM attempts to reset the SIS.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

The following can cause an intermittent condition

  1. A short between the SIS signal and voltage circuits
  2. High or low resistance in the SIS signal and voltage circuits
  3. Inspect the SIS signal and voltage circuits carefully for cutting and/or chafing.
  4. Verify that the correct SIS is installed in the vehicle.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0079, B0080, B0081, or B0082 are current. If DTC B0079, B0080, B0081, or B0082 are current, replace the malfunctioning SIS. For DTCs B0079 and B0080 replace the left SIS. For DTCs B0081 and B0082 replace the right SIS.
  2. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0077 or B0078 are current. Inspect and test wiring system components. For DTC B0077 replace the left SIS. For DTC B0078 replace the right SIS.
  3. Verify DTC B0077, B0078, B0079, B0080, B0081, or B0082 are not current.
  4. If DTC B0077, B0078, B0079, B0080, B0081, or B0082 reset as current, remove the SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the SIS circuits. If damage or corrosion is found make the appropriate repair. Replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Side Impact Sensor Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 CircuitB0084B0084B0084B0084B0084
Seat Position Sensor - Right CircuitB0083B0083B0083B0083B0083

DTC B0083 or B0084

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 near the 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. Its important to understand that the SPS is secondary to the passenger presence system (PPS) and the manual instrument panel (I/P) module disable switch. If either one of these devices are in the disable mode the passenger air bag will not deploy regardless of the SPS status.

Ignition voltage is between 9-16 volts.

DTC B0083 and B0084 will set when one of the following conditions occur

  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 commands the AIR BAG indicator ON.
  2. The SDM defaults the SPS to seat forward threshold.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

The following can cause an intermittent condition

  1. A short between the SPS signal and low reference circuits
  2. High or low resistance in the SPS signal and low reference circuits
  3. Inspect the SPS signal and return circuits carefully for cutting and/or chafing.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. With the ignition OFF, disconnect the SPS connector. If DTC B0083 is present, disconnect the right SPS located on the RF outboard seat track. If DTC B0084 is present, disconnect the left SPS located on the LF outboard seat track.
  2. Test and inspect the component signal and ground circuits for damage or corrosion.
  3. Replace the defective SPS. If DTC B0083 is present, replace the right SPS located on the RF outboard seat track. If DTC B0084 is present, replace the left SPS located on the LF outboard seat track.
  4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0083 and/or B0084 is cleared.
  5. If DTC does not clear remove the inflatable restraint SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the SPS high and/or low circuits. If damage or corrosion is found make the appropriate repair.
  6. Test the high and low circuits between the SDM and SPS for a short to voltage, short to ground, or open/low resistance. If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Seat Position Sensor Replacement (Power Seat)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 commanding both the PASSENGER AIR BAG ON/OFF indicators ON 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 command the AIR BAG indicator ON.

Ignition 1 voltage is within the normal operating voltage range.

  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 commands the AIR BAG.
  1. The condition 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

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

IMPORTANTIf the PPS has any current or history DTC stored, you must address the PPS DTC before continuing with this diagnostic procedure.
  1. With the scan tool, check for PPS DTC. Refer to «Passenger Presence System Flash Code Procedures»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) . Diagnose all PPS DTC. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) .
  2. Inspect the PPS and passenger seat inline connector for corrosion or damage. If any of the above conditions are found, make the appropriate repair.
  3. Test the voltage circuits for the PPS for a short to ground or open/high resistance. If any of the above conditions are found, make the appropriate repair.
  4. Reconnect all components, with ignition ON use the scan tool to clear DTC. Recheck for DTC. When all PPS faults have been repaired, rezero the PPS.
  5. Verify that DTC B0092 does not set as a current DTC. If DTC B0092 does set as a current DTC, replace and rezero the PPS. After replacement and the rezeroing of the PPS are completed, perform the repair verification.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 commanding both the PASSENGER AIR BAG ON/OFF indicators ON 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. If the data stored in memory does not match the information transmitted by the PPS, the SDM will set DTC B0098 and command the AIR BAG indicator ON. The PPS will set DTC 064 and request the SDM to disable the instrument panel (I/P) module deployment loop.

Ignition 1 voltage is within the normal operating voltage range.

  1. The PPS has a current fault.
  2. The PPS fault counter in the SDM has reached 127 counts.
  1. The SDM disables the I/P module deployment loop.
  2. The SDM commands the AIR BAG indicator ON.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
IMPORTANTDTC B0098 will also set if the PPS has a current malfunction and has set DTC 064. The SDM will set DTC B0098 as current and command the AIR BAG indictor ON. This is done to notify the driver of any PPS malfunctions. When DTC B0098 is present it is important to check the PPS for any current DTCs. Refer to Passenger Presence System Flash Code Procedures . If the PPS has any current DTCs, address these before performing this DTC chart.

DTC 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

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Verify that the vehicle has the correct PPS and SDM installed. If an incorrect PPS or SDM has been installed, replace the incorrect component and perform the programming procedure for that component.
  2. If the correct components are installed and DTC B0098 is set as a current DTC, replace the PPS. Replace the PPS and rezero the system.
  3. If after replacement of the PPS, DTC B0098 is set as current, replace the SDM. Replace the SDM and perform the SDM Setup procedure.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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

DTC B0100, B0101, B0102, B0103, B0104, or B0105

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 commands the AIR BAG indicator ON.
  2. The SDM attempts to reset the EFS.
  1. The condition for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

The following can cause an intermittent condition

  1. A short between the EFS signal and voltage circuits
  2. High or low resistance in the EFS signal and voltage circuits
  3. Inspect the EFS signal and voltage circuits carefully for cutting and/or chafing.
  4. Verify the correct EFS is installed in the vehicle.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Verify that DTC B0101, B0102, B0104, or B0105 are not set. If DTC B0101 or B0102 is set replace the left EFS. If the DTC resets, replace the SDM. If DTC B0104 or B0105 is set replace the right EFS. If the DTC resets, replace the SDM.
  2. Ignition OFF, disconnect the harness connector at the applicable front end sensor and the harness connector at the SDM. If DTC B0100 is set disconnect the left EFS If DTC B0103 is set disconnect the right EFS
  3. Test for less than 1 volt between the signal circuit terminal 1 and ground. If greater than the specified range, test the signal circuit for a short to voltage.
  4. Test for infinite resistance between the signal circuit terminal 1 and ground. If greater than the specified range, test the signal circuit short to ground.
  5. Test for less than 1 ohm of resistance between the low reference circuit terminal 2 and the SDM connector terminal listed below: If DTC B0100 is set, SDM terminal 26 If DTC B0103 is set, SDM terminal 27 If greater than the specified range, test the low reference circuit for an open/high resistance.
  6. Connect the SDM and EFS connectors.
  7. Verify that DTC B0100 or B0103 are not set. If DTC B0100 is set replace the left EFS. If the DTC resets, replace the SDM. If DTC B0103 is set replace the right EFS. If the DTC resets, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Front End Sensor Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is first turned ON, the inflatable restraint sensing and diagnostic module (SDM) compares the restraints ID stored in the SDM to the restraints ID stored in the body control module (BCM). The restraints ID being compared contains the last four digits of the SDM part number. The SDM then compares the vehicle identification number (VIN) stored in the SDM to the VIN stored in the BCM.

Ignition voltage is between 9-16 volts.

The restraints ID stored in the SDM does not match the restraints ID stored in the BCM, or the VIN information stored in the SDM does not match the VIN information stored in the BCM.

  1. The SDM commands ON the AIR BAG warning lamp via class 2 serial data.
  2. The SDM disables all AIR BAG deployments.
  1. You issue a scan tool CLEAR DTCs command.
  2. The restraints ID that is stored in the SDM matches the restraints ID that is stored in the BCM.

DTC B1001 is an indication that the restraint IDs stored in both the BCM and SDM do not match or that the VINs stored in both the BCM and SDM do not match. If the BCM was replaced, the replacement module will have to be reprogrammed for proper operation.

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  1. Ignition ON, use the scan tool to request SIR DTCs. Verify that DTC B1001 is set as current. If DTC B1001 is history, clear codes and recheck.
  2. Using the scan tool check the BCM that is programmed with the VIN. Verify that the BCM is programmed with the correct VIN number with the vehicle VIN plate. If the BCM has the wrong VIN number, refer to «BODY CONTROL MODULE PROGRAMMING AND SETUP»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems) for programming.
  3. Using the scan tool perform the Setup SDM Part Number into BCM procedure.
  4. Ignition ON use the scan tool to clear the DTCs. Verify that DTC B1001 is cleared. If DTC B1001 was current replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM and BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 the Passenger Presence System (PPS). When the SDM has completed the power-up mode, the SDM will establish communication with the PPS. The SDM will increase a fault counter with each ignition cycle that a fault exists with the PPS. The SDM will lock out the PPS after a predetermined ignition cycle count maximum has been reached.

Ignition 1 voltage is within the normal operating voltage range.

  1. The PPS has a current fault.
  2. The PPS fault counter in the SDM has reached 127 counts.
  1. The SDM disables the instrument panel (I/P) module deployment loop.
  2. The SDM commands the AIR BAG indicator ON.
  3. The SDM will lock out the malfunctioning PPS.
  1. The PPS has been replaced.
  2. The SDM has been replaced.
IMPORTANTDTC B0092 or DTC B0098 will set if the PPS has a malfunction, and has set any one of the following DTCs 023, 024, 063, 064, or 065. When DTC B0092 or DTC B0098 is present, it is important to check the PPS for any current DTC. Refer to Passenger Presence System Flash Code Procedures . If the PPS has any current DTC, address those DTC before performing this diagnostic procedure.

Any repair performed on the original PPS will not clear DTC B1530.

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

IMPORTANTIf the SDM has DTC B0092 or DTC B0098 stored as current, you must address those DTCs before continuing with this diagnostic procedure.
  1. With a scan tool, check for DTC B0092 or DTC B0098 is a current DTC. Diagnose «DTC B0092»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «DTC B0098»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) if set as a current DTC.
  2. If the PPS has been replaced then DTC B1530 will automatically be cleared. If the PPS was repaired and DTC B1530 is set as current, the SDM will have to be replaced. Replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC U1241 Lost Communication With Scan Tool

Circuit Description

The passenger presence system (PPS) monitors itself for faults and will set/flash DTCs if a fault is detected. The PPS communicates with the inflatable restraint sensing and diagnostic module (SDM) via non class 2 communications. When the SDM receives input from the PPS that a PPS fault has occurred, the SDM will request the instrument panel cluster (IPC) to turn ON the AIR BAG indicator located on the IPC. To determine what DTCs have been set by the PPS, the Tech 2 is used to command the SDM to request the PPS to flash the DTCs using the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The Tech 2 sends a string of commands to the SDM that allows the SDM to communicate with the PPS module and initiate the flashing of the DTCs. When the Tech 2 has completed sending the commands, the PPS will begin flashing any current or history DTCs that the system has stored. When the SDM no longer receives commands from the Tech 2, the SDM mistakes this as a communication fault and sets DTC U1241. DTC U1241 will set when the Tech 2 is used to flash DTCs from the PPS or after the PPS has been rezeroed. DTC U1241 does not indicate a system malfunction and will not cause any warning indicators to illuminate. When DTC U1241 sets, cycle the ignition and use the scan tool to clear the code, no further diagnosis is necessary. For more detailed information concerning the PPS, refer to SIR System Description and Operation . For more detailed information concerning PPS flash code and rezeroing procedures, refer to Passenger Presence System Flash Code Procedures and Passenger Presence System Programming and Setup .

Ignition 1 voltage is within the normal operating voltage range.

DTC U1241 will set when the scan tool is used to flash DTCs from the PPS or after the PPS has been rezeroed.

A scan tool CLEAR DTC command is issued.

DTC U1241 does not indicate a system malfunction and will not cause any warning indicators to illuminate. When DTC U1241 sets, cycle the ignition and use the scan tool to clear the code, no further diagnosis is necessary.

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Symptoms - SIR

IMPORTANTThe following steps must be completed before using the Symptom Tables. Perform the Diagnostic System Check - Vehicle , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) can communicate via the serial data link. Review the system operation in order to familiarize yourself with the system functions. Refer to SIR System Description and Operation .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the SIR system. Refer to «Checking Aftermarket Accessories»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#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 Air Bag Indicator Circuit Malfunction in order to diagnose the symptom.

Refer to Passenger Presence System Indicator Circuit Malfunction in order to diagnose the symptom.

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/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 seven times. The inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within the SIR system. If no SIR system malfunctions exists, the SDM will request the IPC to turn the AIR BAG indicator OFF after it has flashed 7 times. The AIR BAG indicator is controlled by the SDM via class 2 serial data.

  1. If ignition 1 voltage for the SDM is outside of the normal operating voltage range (9-16 volts), the AIR BAG indicator will come ON solid with no DTC set.
  2. The loss of serial data communication between the SDM and the IPC will cause the AIR BAG indicator to come ON solid. Refer to «DTC U1001-U1254»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#data-communication-system) .

Schematic Reference

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  1. With the ignition ON, with a scan tool, request the ignition voltage parameter in the SIR data list. If the parameter does not read 9-16 volts, test the ignition 1 voltage for a short to voltage, open/high resistance or a short to ground. If a condition exists, make the appropriate repair.
  2. With the ignition OFF, test the SDM ground circuit for an open or high resistance. If a condition exists, make the appropriate repair
  3. Remove the inflatable restraint SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction. If damage or corrosion is found make the appropriate repair.
  4. Replace the SDM.
  5. If replacement of the SDM does not repair the vehicle, replace the IPC.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM and IPC replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The PASSENGER AIR BAG ON/OFF indicators located on the instrument panel are used to notify the driver when the passenger presence system (PPS) has enabled or disabled the instrument panel (I/P) inflator module. The PPS air bag indicators will also inform the driver of any PPS malfunctions. When the ignition is turned on, the PPS module is supplied with ignition 1 voltage and commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The PPS module conducts tests on the PPS components and circuits while both PASSENGER AIR BAG ON/OFF indicators are ON. If no malfunctions are detected the PPS module will turn 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 DTC, default the PPS to the OFF state and communicate with the SDM that a DTC has been set. The SDM will request the instrument panel cluster (IPC) to turn the AIR BAG indicator ON to notify the driver of a PPS malfunction.

Use this procedure to diagnosis one or both PPS indicators inoperative.

The following can cause an intermittent condition

  1. A short in the passenger air bag OFF indicator control circuit
  2. A short in the passenger air bag ON indicator control circuit
  3. An open or high resistance in the passenger air bag OFF indicator control circuit
  4. An open or high resistance in the passenger air bag ON indicator control circuit

SIR Schematics

Connector End View Reference

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  1. With the ignition OFF, Disconnect the inside accessory switch connector. Inspect the connector for damage or corrosion that may cause a malfunction If a condition exists, make the appropriate repair.
  2. Ignition ON, test the ignition 1 voltage circuit for 9-16 volts. If ignition 1 voltage is not present, test for an open/high resistance or a short to ground. If a condition exists, make the appropriate repair.
  3. With the ignition OFF, Connect a test lamp between the ignition 1 voltage circuit and the passenger air bag OFF indicator control circuit at the accessory switch connector terminals. Ignition ON, test lamp should illuminate. If the test lamp illuminates, replace the accessory switch.
  4. Test the passenger air bag OFF indicator control circuits for a short to ground, open/high resistance. If a condition exists, make the appropriate repair
  5. Replace the PPS.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Accessory Switch Replacement»(/chevrolet/colorado/i-2004-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gages)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/colorado/i-2004-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS 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 Disabling and Enabling

SIR Service Precautions

CAUTIONWhen 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/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/chevrolet/colorado/i-2004-2012/remont/electrical-component-locations/#wiring-systems-and-power-management-component-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/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/chevrolet/colorado/i-2004-2012/remont/electrical-component-locations/#wiring-systems-and-power-management-component-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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) .

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»(/chevrolet/colorado/i-2004-2012/remont/charging-system/#battery-charging-system-and-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»(/chevrolet/colorado/i-2004-2012/remont/charging-system/#battery-charging-system-and-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/colorado/i-2004-2012/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) .
CAUTIONWhen 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 handle the inflatable restraint vehicle rollover sensor when connected to vehicle power.
  2. Do not expose inflator modules to temperatures above 65°C (150°F).
  3. Verify the correct replacement part number. Do not substitute a component from a different vehicle.
  4. 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 ft) or greater

  1. Inflatable restraint front end sensor
  2. Inflatable restraint instrument panel (I/P) module
  3. Inflatable restraint passenger presence system (PPS)
  4. Inflatable restraint roof rail module
  5. Inflatable restraint SDM
  6. Inflatable restraint side impact sensor (SIS)
  7. Inflatable restraint steering wheel module
  8. Inflatable restraint steering wheel module coil
  9. Inflatable restraint vehicle rollover sensor
  10. Seat belt pretensioner

Removal Procedure

  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the grille. Refer to «Grille Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#exterior-trim) .
  3. Loosen the fasteners (1) retaining the front discriminating sensors to the radiator support.
  4. Remove the sensor assembly from the radiator support.
  5. Position the sensor assembly, to gain access to the electrical connector.
  6. Remove the connector-position assurance (CPA) from the sensor electrical connector.
  7. Disconnect the sensor electrical connector.
  8. Remove the sensor from the vehicle.

Installation Procedure

  1. Remove any dirt, grease, or other impurities from the mounting surfaces.
  2. Position the sensor near the radiator support.
  3. Connect the sensor electrical connector.
  4. Install the CPA to the sensor electrical connector.
  5. Install the sensor assembly to the radiator support.
  6. Install the 2 fasteners (1) retaining the discriminating sensor assembly to the radiator support. Tighten: Tighten the bolts to 9 N.m (80 lb in).
  7. Install the grille. Refer to «Grille Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#exterior-trim) .
  8. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the front door trim panel. Refer to «Front Side Door Trim Panel Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  3. Peel the rear half of the water deflector away from the door in order to access the side impact sensor.
  4. Remove the screws that retain the side impact sensor to the door.
  5. Disconnect the impact sensor electrical connector from the side impact sensor.
  6. Remove the side impact sensor from the door.
  1. Remove any dirt, grease, or other impurities from the mounting surface.
  2. Position the side impact sensor horizontally to the door.
  3. Connect the electrical connector to the side impact sensor.
  4. Install the screws which retain the side impact sensor to the door. Tighten: Tighten the screws to 9 N.m (79 lb in).
  5. Fully seat the water deflector to the door.
  6. Install the door trim panel. Refer to «Front Side Door Trim Panel Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  7. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Fold back the carpet in order to gain access to the sensor. Refer to «Floor Panel Carpet Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners) .
  3. Disconnect the electrical connector.
  4. Remove the nuts securing the rollover sensor to the floor panel.
  1. Install the nuts securing the rollover sensor to the floor panel. Tighten: Tighten the screws to 10 N.m (88 lb in).
  2. Connect the electrical connectors.
  3. Install the carpet. Refer to «Floor Panel Carpet Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners) .
  4. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the floor console. Refer to «Console Replacement (Small W/ Manual Transmission)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Console Replacement (Large w/Manual or Auto Transmission)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  3. Cut the carpet along the "I" cut pattern over the inflatable restraint sensing and diagnostic module (SDM).
  4. Fold the carpet back to expose the SDM.
  5. Disconnect the electrical connector (2) from the SDM (1).
  6. Remove the nuts (2) retaining the SDM (1) to the floor studs (3).
  7. Remove the SDM from the vehicle.
  1. Install the SDM (1) to the floor studs (3) with 3 nuts (2). Tighten: Tighten the SDM nuts to 9 N.m (79 lb in).
  2. Connect the electrical connector (2) to the SDM (1).
  3. Fold the carpet back down over the SDM.
  4. Install the floor console. Refer to «Console Replacement (Small W/ Manual Transmission)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Console Replacement (Large w/Manual or Auto Transmission)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  5. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  6. Program the SDM. Refer to «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .
  1. Disable the inflatable restraint steering wheel module. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Locate the access holes (1) positioned on both sides of the steering wheel shroud.
  3. Using a 5.5 mm or 1/4 inch socket with a long 1/4 inch drive handle, push the leaf spring fasteners (1) inward through the access holes.
  4. Lift and partially remove the inflatable restraint steering wheel module from the steering wheel in order to expose the electrical connectors.
  5. Disconnect the electrical connectors (1).
  6. Disconnect the horn electrical connector (3).
  7. Remove the inflatable restraint module from the steering wheel.
  8. 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/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  1. Position the inflatable restraint module to the steering wheel.
  2. Connect the electrical connectors (1) to the inflatable restraint steering wheel module.
  3. Connect the horn electrical connector (3).
  4. Position the 4 alignment posts of the inflatable restraint module to the holes that are located on the steering wheel housing.
  5. Push the inflatable restraint module into the steering wheel to engage and latch the leaf spring fasteners (1).
  6. After installation, pull up on the sides of the inflatable restraint module to ensure the leaf spring fasteners are engaged.
  7. Enable the inflatable restraint steering wheel module. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
IMPORTANTThe inflatable restraint steering wheel module coil and the multifunction turn signal switch are serviced as an assembly.
  1. Disable the supplemental inflatable restraint (SIR) system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the steering wheel. Refer to «Steering Wheel Replacement»(/chevrolet/colorado/i-2004-2012/remont/steering-column-switches/#steering-wheel-steering-column) .
  3. Remove the steering column trim covers. Refer to «Steering Column Trim Covers Replacement»(/chevrolet/colorado/i-2004-2012/remont/steering-column-switches/#steering-wheel-steering-column) .
  4. Remove the wire harness straps from the wire harness assembly.
  5. Disconnect any electrical connectors as needed.
  6. Remove the inflatable restraint steering wheel module coil bolts.
  7. Slide the inflatable restraint steering wheel module coil off of the steering column. Discard the inflatable restraint steering wheel module coil, if replacing.
  1. Slide the inflatable restraint steering wheel module coil onto the steering column.
  2. Install the inflatable restraint steering wheel module coil bolts. Tighten: Tighten the bolts to 4.5 N.m (40 lb in).
  3. Route the wiring harness assembly down the steering column.
  4. Connect any electrical connectors as needed.
  5. Install the wire harness straps to the wire harness assembly.
  6. Remove the centering tab from the inflatable restraint steering wheel module coil, if equipped.
  7. Install the steering column trim covers. Refer to «Steering Column Trim Covers Replacement»(/chevrolet/colorado/i-2004-2012/remont/steering-column-switches/#steering-wheel-steering-column) .
  8. Install the steering wheel. Refer to «Steering Wheel Replacement»(/chevrolet/colorado/i-2004-2012/remont/steering-column-switches/#steering-wheel-steering-column) .
  9. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/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 is in the LOCK position.
  2. If the front (5) of the SIR coil has a centering window (4), and the back side (2) includes a spring service lock (1), perform the following steps: Hold the SIR 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 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) includes NO spring service lock, perform the following steps: Hold the SIR 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 SIR coil with the horn tower and slide onto the steering shaft assembly.
  4. If the front side (3) of the SIR coil has NO centering window, but the back side (2) includes a spring service lock (1), perform the following steps: Hold the SIR 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 locking tabs. The SIR coil is now centered. Align the centered SIR coil with the horn tower and slide onto the steering shaft assembly.
  5. If the front side (2) of the SIR coil has NO centering window, and the back side (1) includes NO spring service lock, perform the following steps: Hold the SIR 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 SIR coil with the horn tower and slide onto the steering shaft assembly.
  6. If double wire harness strap is installed onto the wire harness assembly and column, you must route the wires up against the steering column. One wire harness strap will surround one lead from the coil to the steering column. The other wire harness strap will surround all leads to the steering column.
  1. Disable the SIR System. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the instrument panel (I/P) accessory trim panel. Refer to «Instrument Panel Accessory Trim Plate Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  3. Remove the radio. Refer to «Radio Replacement»(/chevrolet/colorado/i-2004-2012/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
  4. Remove the right access cover from the I/P end cap.
  5. Remove the right air outlet. Refer to «Instrument Panel Outer Air Outlet Replacement - Right Side»(/chevrolet/colorado/i-2004-2012/remont/manual-hvac-system/#heating-ventilation-and-air-conditioning) .
  6. Remove the I/P compartment door. Refer to «Instrument Panel Compartment Door Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  7. Remove the digital radio receiver, if equipped. Refer to «Digital Radio Receiver Replacement»(/chevrolet/colorado/i-2004-2012/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
  8. Access the 2 fasteners located above the service holes (1) inside the I/P compartment door opening.
  9. Remove the fasteners from the passenger supplemental inflatable restraint (PSIR) inflator module.
  10. Remove the 2 side retaining nuts (1) from the PSIR module.
  11. Partially remove the PSIR inflator module from the I/P.
  12. Disconnect the connector position assurance (CPA).
  13. Disconnect the electrical connector from the PSIR module.
  14. Remove the PSIR inflator module from the vehicle.
  15. Fully deploy the module before disposal. If the module is being replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  16. If replacing the PSIR bracket, remove the I/P assembly. Refer to «Instrument Panel Assembly Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  17. Remove the 2 fasteners retaining the PSIR bracket to the I/P structure.
  18. Remove the PSIR bracket from the vehicle.
  1. If replacing the PSIR bracket, install the PSIR bracket to the I/P structure.
  2. Install the 2 fasteners retaining the PSIR bracket to the I/P structure. Tighten: Tighten the fasteners to 9 N.m (80 lb in).
  3. Install the I/P assembly. Refer to «Instrument Panel Assembly Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  4. Position the PSIR inflator module to the front of the I/P and connect the electrical connector.
  5. Connect the CPA.
  6. Install the PSIR inflator module to the I/P.
  7. Partially Install the 2 lower fasteners retaining the PSIR module to the I/P structure.
  8. Install the 2 side retaining nuts (1) to the PSIR inflator module. Tighten: Tighten the 4 PSIR fasteners until fully driven, seated and not stripped.
  9. Install the digital radio receiver, if equipped. Refer to «Digital Radio Receiver Replacement»(/chevrolet/colorado/i-2004-2012/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
  10. Install the radio. Refer to «Radio Replacement»(/chevrolet/colorado/i-2004-2012/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
  11. Install the I/P accessory trim panel. Refer to «Instrument Panel Accessory Trim Plate Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  12. Install the right air outlet. Refer to «Instrument Panel Outer Air Outlet Replacement - Right Side»(/chevrolet/colorado/i-2004-2012/remont/manual-hvac-system/#heating-ventilation-and-air-conditioning) .
  13. Install the right access cover to the I/P end cap.
  14. Enable the SIR System. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  15. Install the I/P compartment door. Refer to «Instrument Panel Compartment Door Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  1. Remove the seat from the vehicle. Refer to «Front Seat Replacement - Bucket»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) or «Split Bench Seat Replacement»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  2. Ensure that the seat is in the full rear position.
  3. Locate the seat position sensor (1) under the seat on the inside of the inner seat rail.
  4. Disconnect the electrical connector (3) from the seat position sensor (1).
  5. Remove the 2 nuts (2) that retain the seat position sensor to the seat rail.
  6. Remove the seat position sensor from the seat.
  1. Install the seat position sensor (1) to the seat rail with 2 nuts (2). Tighten: Tighten the seat position sensor nuts to 9 N.m (79 lb in).
  2. Connect the electrical connector (13) to the seat position sensor (1).
  3. Install the seat in the vehicle. Refer to «Front Seat Replacement - Bucket»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) or «Split Bench Seat Replacement»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
CAUTIONReplace the passenger presence system as a complete assembly to prevent possible injury to the occupant. The bladder, the pressure sensor, the seat cushion, and the control module 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.
  1. Remove the seat cushion trim cover and pad.
  2. Disconnect the electrical connectors.
  3. Remove the bolts that retain the electronic control unit (ECU) (1) from the bottom of the passenger seat cushion frame.
  4. Remove the pressure switch (2) from the bottom of the passenger seat cushion frame.
  5. Remove the push-in retainers (1) that hold the bladder to the seat cushion frame.
  6. Remove the inflatable restraint passenger presence system from the seat.

Installation Procedures

  1. Install the inflatable restraint passenger presence system to the seat.
  2. Install the push-in retainers (1) that hold the bladder to the seat cushion frame.
  3. Install the pressure sensor (2) to the bottom of the passenger seat cushion frame.
  4. Install the bolts that retain the ECU (1) to the bottom the passenger seat cushion frame. Tighten: Tighten the bolts to 2 N.m (18 lb in).
  5. Connect the electrical connectors.
  6. Install the seat cushion trim cover and pad.
  7. Re-zero the inflatable restraint passenger presence system. Refer to «Control Module References»(/chevrolet/colorado/i-2004-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the head restraints from the front seats. Refer to «Front Seat Head Restraint Replacement»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  3. Lower the headliner. Refer to «Headlining Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-crew-cab) or «Headlining Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-extended-cab) or «Headlining Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-regular-cab) .
  4. Disconnect the roof rail air bag electrical connector (1).
  5. Remove the forward tether bolt (3).
  6. Remove the clips (3) from the pillar.
  7. Remove the 3 bolts retaining the rear curtain to the roof.
  8. Remove the bolt retaining the bracket to the roof.
  9. Remove the forward curtain clip (2).
  10. Remove the 3 bolts (1, 3) retaining the air bag module to the roof.
  11. Remove the roof rail air bag from the vehicle.
  1. Install the 3 bolts (1, 3) retaining the roof rail air bag module to the roof. Tighten: Tighten the roof rail air bag module bolts to 9 N.m (79 lb in).
  2. Install the forward curtain clip (2).
  3. Install the bolt retaining the bracket to the roof.
  4. Install the 3 bolts retaining the rear curtain to the roof. Tighten: Tighten the roof rail air bag curtain bolts to 9 N.m (79 lb in).
  5. Install the clips (3) to the pillar.
  6. Install the roof rail air bag forward tether bolt (3). Tighten: Tighten the roof rail air bag forward tether bolt to 9 N.m (79 lb in).
  7. Connect the roof rail air bag electrical connector (1).
  8. Install the headliner. Refer to «Headlining Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-crew-cab) or «Headlining Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-extended-cab) or «Headlining Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-regular-cab) .
  9. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  10. Install the head restraints from the front seats. Refer to «Front Seat Head Restraint Replacement»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Remove the head restraints from the front seats. Refer to «Front Seat Head Restraint Replacement»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  3. Lower the headliner. Refer to «Headlining Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-crew-cab) or «Headlining Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-extended-cab) or «Headlining Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-regular-cab) .
  4. Disconnect the roof rail air bag electrical connector (1).
  5. Remove the forward tether bolt (3).
  6. Remove the clips (3) from the pillar.
  7. Remove the forward curtain clip (2).
  8. Remove the 3 bolts (1) retaining the air bag module to the roof.
  9. Remove the bolt (5) retaining the rear curtain to the roof.
  10. Remove the rear tether bolt (3).
  11. Remove the roof rail air bag from the vehicle.
  1. Install the 3 bolts (1) retaining the roof rail air bag module to the roof. Tighten: Tighten the roof rail air bag module bolts to 9 N.m (79 lb in).
  2. Install a new forward curtain clip (2).
  3. Install the bolt (5) retaining the rear curtain to the roof. Tighten: Tighten the roof rail air bag curtain bolts to 9 N.m (79 lb in).
  4. Install the rear tether bolt (3). Tighten: Tighten the roof rail air bag rear tether bolt to 9 N.m (79 lb in).
  5. Install the clips (3) to the pillar.
  6. Install the roof rail air bag forward tether bolt (3). Tighten: Tighten the roof rail air bag forward tether bolt to 9 N.m (79 lb in).
  7. Connect the roof rail air bag electrical connector (1).
  8. Install the headliner. Refer to «Headlining Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-crew-cab) or «Headlining Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-extended-cab) or «Headlining Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#floor-coverings-headliners__headlining-trim-panel-replacement-regular-cab) .
  9. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  10. Install the head restraints from the front seats. Refer to «Front Seat Head Restraint Replacement»(/chevrolet/colorado/i-2004-2012/remont/seats/#seat-hardware-seat-trim-and-upholstery) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Open the belt upper guide shoulder bolt trim cover.
  3. Remove the front seat belt upper guide shoulder bolt.
  4. Remove the body rear corner trim panel. Refer to «Body Side Rear Lower Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  5. Remove the seat belt anchor bolt.
  6. Disconnect the electrical connector from the retractor/pretensioner.
  7. Remove the bolt that retains the seat belt retractor/pretensioner assembly to the body.
  8. Remove the seat belt assembly from the vehicle.
  1. Position the seat belt retractor/pretensioner assembly to the vehicle.
  2. Install the bolt which retains the seat belt retractor/pretensioner assembly to the body. Tighten: Tighten the seat belt retractor/pretensioner bolt to 52.5 N.m (39 lb ft).
  3. Connect the electrical connector to the retractor/pretensioner.
  4. Install the seat belt upper guide with the bolt. Ensure that the seat belt webbing is not twisted. Tighten: Tighten the seat belt upper guide bolt to 52.5 N.m (39 lb ft).
  5. Install the seat belt upper guide shoulder bolt trim cover.
  6. Install the seat belt anchor bolt. Ensure that the seat belt webbing is not twisted. Tighten: Tighten the front seat belt anchor bolt to 52.5 N.m (39 lb ft).
  7. Install the body rear corner trim panel. Refer to «Body Side Rear Lower Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  8. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Open the front seat belt upper guide shoulder bolt trim cover.
  3. Remove the front seat belt upper guide shoulder bolt.
  4. Remove the body rear corner trim panel. Refer to «Body Side Rear Lower Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  5. Remove the front seat belt anchor bolt.
  6. Disconnect the electrical connector from the retractor/pretensioner.
  7. Remove the bolt that retains the seat belt retractor/pretensioner assembly to the body.
  8. Remove the front seat belt assembly from the vehicle.
  1. Position the rear seat belt retractor/pretensioner assembly to the vehicle.
  2. Install the bolt which retains the seat belt retractor/pretensioner assembly to the body. Tighten: Tighten the seat belt retractor/pretensioner bolt to 52.5 N.m (39 lb ft).
  3. Connect the electrical connector to the retractor/pretensioner.
  4. Install the front seat belt upper guide with the bolt. Ensure that the seat belt webbing is not twisted. Tighten: Tighten the front seat belt upper guide bolt to 52.5 N.m (39 lb ft).
  5. Install the front seat belt upper guide shoulder bolt trim cover.
  6. Install the body rear corner trim panel. Refer to «Body Side Rear Lower Trim Panel Replacement (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) or «Body Side Rear Lower Trim Panel Replacement (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  7. Install the front seat belt anchor bolt. Ensure that the seat belt webbing is not twisted. Tighten: Tighten the front seat belt anchor bolt to 52.5 N.m (39 lb ft).
  8. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  1. Disable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Open the front seat belt upper guide shoulder bolt trim cover.
  3. Remove the front seat belt upper guide shoulder bolt.
  4. Remove the lower center pillar trim panel. Refer to «Center Pillar Upper Trim Panel Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  5. Remove the front seat belt anchor bolt.
  6. Disconnect the electrical connector from the retractor/pretensioner.
  7. Remove the bolt that retains the seat belt retractor/pretensioner assembly to the body.
  8. Remove the front seat belt assembly from the vehicle.
  1. Position the rear seat belt retractor/pretensioner assembly to the vehicle.
  2. Install the bolt which retains the seat belt retractor/pretensioner assembly to the body. Tighten: Tighten the seat belt retractor/pretensioner bolt to 52.5 N.m (39 lb ft).
  3. Connect the electrical connector to the retractor/pretensioner.
  4. Install the lower center pillar trim panel. Refer to «Center Pillar Upper Trim Panel Replacement»(/chevrolet/colorado/i-2004-2012/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
  5. Install the front seat belt anchor bolt. Ensure that the seat belt webbing is not twisted. Tighten: Tighten the front seat belt anchor bolt to 52.5 N.m (39 lb ft).
  6. Install the front seat belt upper guide with the bolt. Ensure that the seat belt webbing is not twisted. Tighten: Tighten the front seat belt upper guide bolt to 52.5 N.m (39 lb ft).
  7. Install the front seat belt upper guide shoulder bolt trim cover.
  8. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .

Accident With or Without Inflator Module Deployment - Component Inspections

CAUTIONProper operation of the 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 in a collision or deployment 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 or replace the mounting points and mounting hardware as needed.

  1. The steering column-Perform the steering column accident damage checking procedures. Refer to «Steering Column Accident Damage Inspection»(/chevrolet/colorado/i-2004-2012/remont/steering-column-switches/#steering-wheel-steering-column__steering-column-accident-damage-inspection) .
  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 «Operational and Functional Checks»(/chevrolet/colorado/i-2004-2012/remont/restraints-control-systems/#seat-belt-system__operational-and-functional-checks) .
  5. The I/P mounting points and brackets-Inspect for bending, twisting, buckling, or any other type of damage.
  6. The roof rail and roof rail module mounting points-Inspect for bending, twisting, buckling, or any other type of damage.
  7. The seats and seat mounting points-Inspect for bending, twisting, buckling, or any other type of damage.
  8. Passenger seat bottom equipped with 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. If you detect any damage, replace the component. If you detect any damage to the mounting points or mounting hardware, repair or replace the mounting points and mounting hardware as needed.

IMPORTANTThe 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 front end sensors
  2. Inflatable restraint I/P module, if deployed and after performing the necessary inspections listed above
  3. Inflatable restraint sensing and diagnostic module (SDM)
  4. Inflatable restraint steering wheel module
  5. Inflatable restraint steering wheel module coil
  6. 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, front end sensors, seat belt pretensioners, and vehicle rollover sensor-Inspect for any damage and repair or replace each component as needed.
  3. Passenger Presence System (PPS) for damage to the wiring or pressure system

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 roof rail module, on the side of the impact.
  2. Inflatable restraint side impact sensors (SIS) (left/right), on the side of the impact
  3. Inflatable restraint side impact module (left/right), on the side of the impact
  4. Inflatable restraint SDM
  5. Seat belt pretensioner, on the side of impact.

Perform additional inspections on the following components

  1. Mounting points or mounting hardware for the SIS, roof rail module (left/right), and seat belt pretensioner on the side of impact-Inspect for any damage and repair or replace each component as needed.
  2. Mounting points or mounting hardware for the SDM and vehicle rollover sensor-Inspect for any damage and repair or replace each component as needed.

Sensor Replacement Guidelines

The SIR/side air bag 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, replace the SIR sensor.

  1. Replace the sensor whether or not the air bags have deployed.
  2. Replace the sensor even if the sensor 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.

Live and Undeployed Inflator Module

Special Tools

  1. J 38826 SIR Deployment Harness. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. J 39401-B SIR Deployment Fixture. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  3. An appropriate pigtail adapter

Scheme 6

Scheme 6
Scheme 6

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 report, GM-1241, 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.

CAUTIONIn order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflator module as normal shop waste. Undeployed inflator modules contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed inflator module. Failure to observe the following disposal methods may be a violation of federal, state, or local laws.
  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Put on safety glasses.
  4. Remove the inflator module. If you are removing the steering wheel module, refer to «Inflatable Restraint Steering Wheel Module Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) . If you are removing the I/P module, refer to «Inflatable Restraint Instrument Panel Module Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) . If you are removing a roof rail module, refer to «Inflatable Restraint Roof Side Rail Module Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Inflatable Restraint Roof Side Rail Module Replacement - Front (Regular and Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  5. Place the inflator module on a work bench, with the vinyl trim cover facing up and away from the surface.
  6. 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.
  7. Clear the area of loose or flammable objects.
  8. If you are deploying a steering wheel inflator module, place the inflator module in the center of the space.
  9. When deploying an I/P inflator module, perform the following instructions: Place the J 39401-B in the center of the cleared area. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . 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).
  10. When deploying a roof rail module, perform the following instructions: Place the J 39401-B (3) in the center of the cleared area. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . 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.
  11. Inspect the SIR deployment harness and the appropriate pigtail adapter (2) for damage. Replace as needed.
  12. Short the 2 SIR deployment harness leads (1) 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 the full length from the deployment fixture or area.
  15. Connect the inflator module (1) to the adapter (2) on the SIR deployment harness (3).
  16. Clear the area of people.
  17. Separate the 2 banana plugs on the SIR deployment harness that were shorted together earlier in the procedure.
  18. Place a 12-volt minimum/2-amp minimum power source, such as a vehicle battery, near the shorted end of the harness.
  19. Connect the SIR deployment harness wires to the power source. Deployment of the inflator module will occur when contact is made.
  20. Disconnect the SIR deployment harness from the power source after the inflator module deploys.
  21. 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.
  22. Seat one banana plug into the other in order to short the deployment harness leads.
  23. Put on a pair of shop gloves.
  24. Disconnect the pigtail adapter from the inflator module as soon as possible.
  25. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
  26. Dispose of the deployed inflator module through normal refuse channels.
  27. 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.
CAUTIONWhen deploying a SIR component for disposal, perform the deployment procedures in the order listed. Failure to observe the procedures in the order listed may result in personal injury.
  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. Driver inflator module is secured to the steering wheel. Passenger inflator module is secured to the instrument panel. Left roof rail inflator module is secured to the left roof rail. Right roof rail inflator module is secured to the right roof rail.
  4. Put on safety glasses.
  5. Remove all loose objects from the front seats.
  6. Disconnect the steering wheel module yellow connector (1) from vehicle harness yellow connector (2).
  7. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  8. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  9. 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.
  10. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  11. 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.
  12. 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/colorado/i-2004-2012/remont/electrical-component-locations/#wiring-systems-and-power-management-component-connector-end-views) in order to determine the correct circuits.
  13. Inspect that the 3-wire connection is secure.
  14. Bend flat the twisted connection.
  15. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  16. 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/colorado/i-2004-2012/remont/electrical-component-locations/#wiring-systems-and-power-management-component-connector-end-views) in order to determine the correct circuits.
  17. Inspect that the 3-wire connection is secure.
  18. Bend flat the twisted connection.
  19. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  20. Connect the deployment harness to the connector on the steering wheel module.
  21. Route the deployment harness out of the driver side of the vehicle.
  22. Disconnect the yellow left roof rail harness connector from the vehicle harness connector.
  23. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  24. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  25. 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.
  26. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  27. Twist together one end from each of the wires in order to short the wires.
  28. Twist together one connector wire lead to one deployment wire.
  29. Bend flat the twisted connection.
  30. Secure and insulate the connection using electrical tape.
  31. Twist together, bend, and tape the remaining connector wire lead to the remaining deployment wire.
  32. Connect the deployment harness to the yellow connector of the roof rail module.
  33. Route the deployment harness out of the driver side of the vehicle.
  34. Disconnect the I/P module yellow harness connector (1) from the vehicle harness connector (2).
  35. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  36. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  37. 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.
  38. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  39. Twist together one end from each of the wires in order to short the wires.
  40. 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/colorado/i-2004-2012/remont/electrical-component-locations/#wiring-systems-and-power-management-component-connector-end-views) in order to determine the correct circuits.
  41. Inspect that the 3-wire connection is secure.
  42. Bend flat the twisted connection.
  43. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  44. 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/colorado/i-2004-2012/remont/electrical-component-locations/#wiring-systems-and-power-management-component-connector-end-views) in order to determine the correct circuits.
  45. Inspect that the 3-wire connection is secure.
  46. Bend flat the twisted connection.
  47. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
  48. Connect the deployment harness to the I/P module in-line connector.
  49. Route the deployment harness out of the passenger side of the vehicle.
  50. Disconnect the yellow harness connector to the right roof rail air bag from the vehicle harness connector.
  51. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  52. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  53. 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 module deployment harness.
  54. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
  55. Twist together one end from each of the wires in order to short the wires.
  56. Twist together one connector wire lead to one deployment wire.
  57. Bend flat the twisted connection.
  58. Secure and insulate the connection using electrical tape.
  59. Twist together, bend, and tape the remaining connector wire lead to the remaining deployment wire.
  60. Connect the deployment harness to the roof rail module yellow connector.
  61. Route the deployment harness out of the passenger side of the vehicle.
  62. Completely cover the windshield and the front door window openings with a drop cloth.
  63. Stretch to the full length all of the deployment harness wires on the right side of the vehicle.
  64. Deploy each deployment loop one at a time.
  65. Place a power source, 12 V minimum / 2 A minimum, such as a vehicle battery, near the shorted end of the harnesses.
  66. Separate one set of wires and touch the wire ends to the power source in order to deploy the selected inflator module.
  67. Disconnect the deployment harness from the power source and twist the wire ends together.
  68. Continue the same process with the remaining deployment harnesses.
  69. Stretch to the full length all of the deployment harness wires on the left side of the vehicle.
  70. Deploy each deployment loop one at a time.
  71. Place a power source, 12 V minimum / 2 A minimum, such as a vehicle battery, near the shorted end of the harnesses.
  72. Separate one set of wires and touch the wires ends to the power source in order to deploy the selected inflator modules.
  73. Disconnect the deployment harness from the power source and twist the wire ends together.
  74. Continue the same process with the remaining deployment harnesses.
  75. Remove the drop cloth from the vehicle.
  76. Disconnect all harnesses from the vehicle.
  77. Discard the harnesses.
  78. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
  79. If one or all of the inflator modules did not deploy, perform the following steps to remove the undeployed modules from the vehicle: «Inflatable Restraint Steering Wheel Module Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) «Inflatable Restraint Instrument Panel Module Replacement»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) «Inflatable Restraint Roof Side Rail Module Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Inflatable Restraint Roof Side Rail Module Replacement - Front (Regular and Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system)

Pretensioner Handling and Scrapping

Tools Required

  1. J 39401-B SIR Deployment Fixture. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. J 38826 SIR Deployment Harness. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  3. An appropriate pigtail adaptor

During the course of a vehicle's useful life, certain situations may arise which will require the disposal of a live and undeployed seat belt pretensioner. Do not dispose of a live and undeployed seat belt pretensioner through normal disposal channels until the seat belt pretensioner has been deployed. The following information covers the proper procedures for disposing of a live and undeployed seat belt pretensioner. Do not deploy the seat belt pretensioner in the following situations

  1. After replacement of a seat belt pretensioner under warranty. The seat belt pretensioner may need to be returned undeployed to the manufacturer.
  2. If the vehicle is the subject of a Product Liability report, GM1241, related to the SIR system or the seat belt system. If the vehicle is subject to the Product Liability report, do not alter the SIR or seat belt system in any manner.
  3. If the vehicle is involved in a campaign affecting the seat belt pretensioners. Follow the instructions in the Campaign Service Bulletin for proper SIR handling procedures.

The seat belt 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 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, it is determined that the seat belt pretensioner is malfunctioning.
  2. The seat belt pretensioner pigtail, if equipped, is damaged.
  3. The seat belt pretensioner connector is damaged.
  4. The seat belt pretensioner connector terminals are damaged.

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

CAUTIONIn order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflatable restraint seat belt pretensioner as normal shop waste. Undeployed seat belt pretensioners contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed seat belt pretensioner. Failure to observe the following disposal methods may be a violation of federal, state, or local laws.
  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Put on safety glasses.
  4. Remove the seat belt pretensioner from the vehicle. Refer to «Seat Belt Retractor Pretensioner Replacement - Front (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  5. When carrying a seat belt pretensioner to the deployment area, keep fingers clear of the seat belt webbing.
  6. Clear a space on the ground about 1.85 m (6 ft) in diameter (a) for deployment of the seat belt 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 in the center of the cleared area. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  9. Fill the fixture plastic reservoir with water or sand.
  10. Mount the seat belt pretensioner (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. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . To mount, use the proper size bolt (2) and nut (5) with washers in order to secure the seat belt pretensioner (1) to the deployment fixture brackets. Securely tighten all fasteners prior to deployment.
  11. Inspect the J 38826 and the appropriate pigtail adapter for damage. See «Special Tools»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Replace as needed.
  12. Short the 2 SIR deployment harness (1) leads together using 1 banana plug seated into the other.
  13. Connect the appropriate pigtail adapter (2) to the SIR deployment harness.
  14. Extend the SIR deployment harness and adapter to full length from the deployment fixture.
  15. Connect the seat belt pretensioner connector (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 volt minimum/2 amp minimum power source, such as a vehicle battery, near the shorted end of the harness.
  19. Connect the SIR deployment harness wires to the power source. Seat belt pretensioner deployment will occur when contact is made.
  20. Disconnect the SIR deployment harness from the power source after the seat belt pretensioner deploys.
  21. Seat one banana plug into the other in order to short the deployment harness leads.
  22. If the seat 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 seat belt pretensioner as soon as possible.
  25. Dispose of the deployed seat belt pretensioner through normal refuse channels.
  26. Wash hands with a mild soap.

Deploy the seat belt pretensioners 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 its useful life.
  2. Irreparable damage occurs to the vehicle in a non-deployment type accident.
  3. Irreparable damage occurs 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. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Put on safety glasses.
  4. Remove all loose objects from the front seats.
  5. Disconnect the seat belt pretensioner connector. Refer to «Seat Belt Retractor Pretensioner Replacement - Front (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  6. Cut the seat belt pretensioner 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. These wires will be used for the seat belt pretensioner deployment harness.
  9. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
  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 seat belt pretensioner.
  11. Twist together one connector wire lead to one deployment wire.
  12. Inspect that the previous connections is secure.
  13. Bend flat the twisted connection.
  14. Secure and insulate the connection using electrical tape.
  15. Twist together, bend, and tape the remaining connector wire lead to the remaining deployment wire.
  16. Connect the deployment harness to the seat belt pretensioner connector.
  17. Route the deployment harness out of the driver side of the vehicle.
  18. Disconnect the seat belt pretensioner connector. Refer to «Seat Belt Retractor Pretensioner Replacement - Front (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  19. Cut the seat belt pretensioner connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
  20. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
  21. 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 for the seat belt pretensioner deployment harness.
  22. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
  23. Twist together one end from each of the wires in order to short the wires. The deployment wires are to remain shorted, and not connected to a power source until you are ready to deploy the seat belt pretensioner.
  24. Twist together one connector wire lead to one deployment wire.
  25. Inspect that the previous connection is secure.
  26. Bend flat the twisted connection.
  27. Secure and insulate the connection using electrical tape.
  28. Twist together, bend, and tape the remaining connector wire lead to the remaining deployment wire.
  29. Connect the deployment harness to the seat belt pretensioner connector.
  30. Route the deployment harness out of the passenger's side of the vehicle.
  31. Completely cover the windshield and the front door openings with a drop cloth.
  32. Deploy each deployment loop one at a time.
  33. Stretch out all of the deployment harness wires on the left and right side of the vehicle to their full length.
  34. Place a power source, 12 volt minimum/2 amp minimum, such as a vehicle battery, near the shorted end of the harnesses.
  35. Separate one set of wires and touch the wire ends to the power source in order to deploy the seat belt pretensioners.
  36. Disconnect the deployment harness from the power source and twist the wire ends together.
  37. Continue the same process with the remaining deployment harnesses that are available.
  38. Remove the drop cloth from the vehicle.
  39. Disconnect all harnesses from the vehicle.
  40. Discard the harnesses.
  41. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
  42. If one or more of the seat belt pretensioners did not deploy, perform the following steps to remove the undeployed seat belt pretensioner from the vehicle, refer to «Seat Belt Retractor Pretensioner Replacement - Front (Extended Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Regular Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (Crew Cab)»(/chevrolet/colorado/i-2004-2012/remont/airbag/#supplemental-inflatable-restraint-system) .
  43. Call the Technical Assistance Group for further assistance.

Scheme 7

Scheme 7: SIR System Overview
Scheme 7: SIR System Overview

The Supplemental Inflatable Restraint (SIR) System supplements the protection offered by the occupants 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). In addition to inflator modules, the vehicle contains an inflatable restraint Passenger Presence System (PPS) that measures the weight of an occupant sitting in the front passenger seat. The PPS uses the weight of the occupant to determine if the I/P inflator module will be enabled or disabled. 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 requesting the instrument panel cluster (IPC) to turn 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.

Frontal SIR System Description

The frontal Supplemental Inflatable Restraint (SIR) System consists of the following components

  1. AIR BAG indicator located on the instrument panel cluster (IPC)
  2. Driver and passenger knee bolsters
  3. Inflatable restraint front end sensors (left/right)
  4. Inflatable restraint PASSENGER AIR BAG ON/OFF indicator located on the instrument panel
  5. Inflatable restraint Passenger Presence System (PPS)
  6. Inflatable restraint passenger seat belt tension sensor
  7. Inflatable restraint seat position sensors (SPS) (left/right)
  8. Inflatable restraint sensing and diagnostic module (SDM)
  9. Inflatable restraint steering wheel module
  10. Inflatable restraint steering wheel module coil
  11. Inflatable restraint wiring harnesses
  12. Seat belt pretensioners (left/right)
  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 diagnostic trouble code (DTC) and requests the IPC to turn the AIR BAG indicator ON. The SDM, instrument panel (I/P) module, steering wheel module, steering wheel module coil and the connecting wires makeup the frontal deployment loops. The SDM continuously monitors the deployment loops for malfunctions and requests the IPC to turn the AIR BAG indicator ON if a fault is detected.

Side SIR System Description (Front)

The side Supplemental Inflatable Restraint (SIR) System (front) consists of the following components

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

The roof rail modules (front) are located in the headliner along the roof rails. The roof rail modules contain a housing, inflatable air bag, initiating device, and a canister of gas generating material. The initiator is part of the roof rail module 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 roof rail air bag. The SDM, roof rail modules (front) and the connecting wires makeup 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 roof rail module (front) is equipped with a shorting bar located on the connector of the module. The shorting bar shorts the roof rail module deployment loop circuitry to prevent unwanted deployment of the air bag when servicing the inflator module.

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. The SDM contains internal sensors along with several external sensors, if equipped, mounted at various locations on the vehicle. In the event of a collision, the SDM performs calculations using the signals received from the internal and external sensors. The SDM compares the results of the calculations to values stored in memory. When these calculations exceed the stored value, the SDM will cause current to flow through the appropriate deployment loops to deploy the air bags. The SDM records the SIR System status when a deployment occurs and requests the instrument panel cluster (IPC) to turn the AIR BAG indicator ON. 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 request the IPC to turn the AIR BAG indicator ON. In the event that ignition 1 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 to note, 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 (PPS)

IMPORTANTThe Passenger Presence System (PPS) is a calibrated unit. When replacing the assembly all parts in the service kit must remain together. Do not mix any of the old parts with the new parts. 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. The PPS consist of an electronic control module, silicone filled sensor pad, pressure sensor, seat belt tension 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 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 turning on one of the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The PPS monitors itself for faults and will set flash diagnostic trouble codes (DTCs) if a fault is detected. The PPS will also notify the SDM of a fault and the SDM will request the instrument panel cluster (IPC) to turn ON the AIR BAG indicator located on the IPC. To determine what DTCs have been set by the PPS, the Tech 2 is used to command the SDM to request the PPS to flash the DTCs using the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel.

Inflatable Restraint Seat Position Sensors (SPS)

The 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 two 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. Its important to understand that the SPS is secondary to the passenger presence system (PPS) in the disable mode the passenger air bag will not deploy regardless of the SPS status.

Inflatable Restraint Passenger Seat Belt Tension Sensor

The seat belt tension sensor is used to enhance the Passenger Presence System (PPS) when an infant car seat is properly restrained on the front outboard passenger seat. The seat belt tension sensor is a 3-wire potentiometer mounted on the lower seat belt anchor and provides an input to the PPS module. When an infant car seat is properly restrained on the front passenger seat, the seat belt is tightly secured through the infant car seat. The seat belt pulls on the tension sensor and changes the voltage signal to the PPS module. The PPS module uses the voltage signal to help determine if a tightly belted infant car seat is installed. The PPS uses the inputs from the seat belt tension sensor and the PPS pressure sensor to determine if the instrument panel (I/P) module should be suppressed or enabled. The PPS monitors the seat belt tension sensor circuits and sets DTC 023 if a fault is detected. To determine what DTCs have been set by the PPS, the Tech 2 is used to command the SDM to request the PPS to flash the DTCs using the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel.

Inflatable Restraint Vehicle Rollover Sensor

The vehicle rollover sensor is used to supplement the side Supplemental Inflatable Restraint (SIR) System. The sensing and diagnostic module (SDM) uses the input from the vehicle rollover sensor to assist in determining the severity of a vehicle rollover or near rollover condition. If the SDM determines a deployment is warranted, the SDM will cause current to flow through the deployment loops deploying the inflatable restraint roof rail modules.

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 class 2 serial data 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 diagnostic trouble code (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.

Inflatable Restraint PASSENGER AIR BAG ON/OFF Indicators

The PASSENGER AIR BAG ON/OFF indicators located on the instrument panel are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the instrument panel (I/P) inflator module. The PPS air bag indicators will also inform the driver of any PPS malfunctions. When the ignition is turned on, the PPS module is supplied with ignition 1 voltage and commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The PPS module conducts tests on the PPS components and circuits while both ON/OFF indicators are ON. If no malfunctions are detected the PPS module will turn 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 sensing and diagnostic module (SDM) that a DTC has been set. When the SDM detects that the PPS has set a DTC, the SDM will set either DTC B0092 or B0098 and request the instrument panel cluster (IPC) to turn the AIR BAG indicator located on the IPC ON. This is done to notify the driver of any PPS malfunctions. The presence of a Supplemental Inflatable Restraint (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 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 front end sensors are equipped on vehicles to supplement the Supplemental 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.

Inflatable Restraint Wiring Harnesses

The wiring harnesses connect the sensing and diagnostic module (SDM), inflator modules, Passenger Presence System (PPS), front end sensors, seat position sensors (SPS), passenger seat belt tension retractor sensor, and the class 2 serial data circuit together using weather pack connectors. SIR deployment loop connectors are yellow in color for easy identification. When repairing Supplemental Inflatable Restraint (SIR) System wiring harnesses, follow the proper testing and wiring repair procedures outlined in this manual.

Seat Belt Pretensioner

The seat belt pretensioner consist of a housing, a seat belt retractor, the seat belt webbing, an initiator, and a canister of gas generating materials. The initiator is part of the seat belt pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the sensing and diagnostic module (SDM) causes current to flow through the seat belt deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas. The gas produced from this reaction deploys the seat belt pretensioner and retracts the seat belt webbing, which removes all of the slack in the seat belts. Depending on the severity of the collision, the seat belt pretensioner may deploy without the frontal inflator modules deploying, or they will deploy immediately before the frontal inflator modules deploy. The seat belt pretensioner will deploy immediately before the frontal inflator modules deploy. Each seat belt pretensioner is equipped with a shorting bar that is located in the connector of the seat belt pretensioner. The shorting bar shorts the seat belt pretensioner circuitry to prevent unwanted deployment of the seat belt pretensioner when the connector is disconnected.

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.

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.

Special Tools

Special Tools Illustration Tool Number/ Description J 38715-A SIR Driver/Passenger Load Tool J 38826 SIR Deployment Harness J 39401-B SIR Deployment Fixture J 42640 Steering Column Anti-Rotation Pin

Scheme 8

Scheme 8: Special Tools
Scheme 8: Special Tools

See also:
• Passenger Presence System Programming and Setup
• 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
• Front Seat Belt Buckle Replacement
• SIR/SRS Wiring Repairs
• Checking Aftermarket Accessories
• DTC U1001-U1254
• Accessory Switch Replacement
• Battery Negative Cable Disconnection and Connection
• SIR Caution
• Grille Replacement
• Fastener Notice
• Front Side Door Trim Panel Replacement
• Floor Panel Carpet Replacement
• Console Replacement (Small W/ Manual Transmission)
• SIR Inflator Module Handling and Storage Caution
• Steering Wheel Replacement
• Radio Replacement
• Instrument Panel Outer Air Outlet Replacement - Right Side
• Front Seat Replacement - Bucket
• Headlining Trim Panel Replacement (Crew Cab)
• Headlining Trim Panel Replacement (Extended Cab)
• Headlining Trim Panel Replacement (Regular Cab)
• Steering Column Accident Damage Inspection
• Operational and Functional Checks
• SIR Seatbelt Pretensioner Handling Caution
• SIR Disabling and Enabling
• DTC B0012, B0013, B0014, B0016, B0017, or B0018
• Special Tools
• SIR Identification Views
• Inflatable Restraint Steering Wheel Module Coil Centering