B1000

DTC B1000

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC B1000
- Internal SDM Failure

Circuit/System Description

This DTC identifies a malfunction within the sensing and diagnostic module (SDM).

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

An internal SDM malfunction exists.

Action Taken When the DTC Sets

* The SDM commands the AIR BAG indicator ON.
* The SIR System is disabled and no deployments are allowed.

Conditions for Clearing the DTC

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

Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

SIR System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Connector Repairs (Connector Repairs)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information.

Circuit/System Testing

Important: Refer to SIR Service Precautions (Technician Safety Information).


When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:


* The front end sensor

* The SDM module

* The front end sensor wiring harness connector

* The SDM wiring harness connector


1. Are other DTCs current in addition to B1000?

• Go to applicable DTC. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle)

2. Turn OFF the ignition.
3. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection (Service and Repair).
4. Wait 90 seconds, then connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection (Service and Repair).
5. Wait at least 2 seconds, then turn ON the ignition, with the engine OFF.
6. Wait at least 60 seconds, then clear any stored DTCs.
7. Turn OFF the ignition.
8. Turn ON the ignition, with the engine OFF.
9. Wait at least 60 seconds, then check if DTC B1000 is present.

• If DTC B1000 is present, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Inflatable Restraint Front End Sensor Replacement (Inflatable Restraint Front End Sensor Replacement)
* Inflatable Restraint Side Impact Sensor Replacement (Front) (Inflatable Restraint Side Impact Sensor Replacement (Front))Inflatable Restraint Side Impact Sensor Replacement (Rear) (Inflatable Restraint Side Impact Sensor Replacement (Rear))
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming