Chevrolet Silverado / GMC Sierra. Manual — part 666

If not the specified range, replace the inflatable restraint I/P module disable switch.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

SIR/SRS Wiring Repairs

Inflatable Restraint Instrument Panel Module Disable Switch Replacement

Control Module References for SDM replacement, setup, and programming

DTC B1000

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B1000 00

Electronic Control Unit (ECU) Performance No Additional Information Available

Circuit/System Description

This diagnostic is specific to the passenger presence system (PPS) module. The internal fault
detection is typically handled inside the control module, however the PPS module may set DTC
B1000 due to other system malfunctions.

Conditions for Running the DTC

The module runs the program to detect an internal fault when power up is commanded. The only
requirements are voltage and ground. This program runs even if the voltage is out of the valid
operating range.

Conditions for Setting the DTC

The module has detected an internal malfunction or a specific sensor circuit may be shorted.

Action Taken When the DTC Sets

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

The module refuses all additional inputs.

Conditions for Clearing the DTC

A current DTC clears when the malfunction is no longer present.

A history DTC clears when the module ignition cycle counter reaches the reset threshold of
100, without a repeat of the malfunction.

Diagnostic Aids

DTC B1000 may set in the PPS module due to shorted circuits of the PPS pressure sensor or
the seat belt tension sensor.

This DTC may be stored as a history DTC without affecting the operation of the module.

If stored only as a history DTC and not retrieved as a current DTC, do not replace the
module.

Circuit/System Verification

Ignition ON, with a scan tool, clear DTC. Verify DTC B1000 is not set as current in the PPS.

If DTC is set as a current DTC, replace the PPS.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for PPS replacement, setup, and programming

DTC B1001 (ROS)

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B1001 00

Option Configuration Error

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores a 4-digit primary key for the
inflatable restraint vehicle rollover sensor (ROS). The SDM sends the ROS the primary key. If
the ROS determines that it is the wrong primary key, the ROS will set DTC B1001 and send the
SDM a vehicle mismatch message. The SDM then will set DTC B0090 3A and turn the SIR
Warning Indicator ON. The ROS does not use a secondary key.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

The 4-digit primary key stored in the SDM does not match the 4-digit key stored in the ROS.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON.

The SDM disables all rollover related deployments.

Conditions for Clearing the DTC

The 4-digit Primary Key in the SDM and in the ROS match.

Diagnostic Aids

This DTC is an indication that the ROS was not set-up correctly, is not the correct part number or
that the ROS is defective.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Verify the correct ROS part number has been installed

If the wrong ROS part number was installed, replace with the correct ROS.

2. Verify that DTC B1001 is not set in the ROS.

If DTC is set, perform the Setup New ROS procedure. If DTC resets replace the ROS.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ROS replacement, setup, and programming

SIR/SRS Wiring Repairs

DTC B1001 (SDM)

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

IMPORTANT: When removing connectors inspect for damage or corrosion.

Damage or corrosion in the following requires repair or
replacement of the affected.

ROS

ROS wiring harness

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado