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Home >> Chevy Truck >> 2012 >> Traverse AWD V6-3.6L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B001B

B001B




DTC B001A or B001B

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 provide an overview of each diagnostic category.

DTC Descriptors

DTC B001A 01
- Driver Seat Belt Retractor Pretensioner Deployment Loop Short to Battery

DTC B001A 02
- Driver Seat Belt Retractor Pretensioner Deployment Loop Short to Ground

DTC B001A 04
- Driver Seat Belt Retractor Pretensioner Deployment Loop Open Circuit

DTC B001A 0D
- Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold

DTC B001A 0E
- Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold

DTC B001B 01
- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Battery

DTC B001B 02
- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground

DTC B001B 04
- Passenger Seat Belt Retractor Pretensioner Deployment Loop Open Circuit

DTC B001B 0D
- Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold

DTC B001B 0E
- Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold

Diagnostic Fault Information






Circuit/System Description

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 seat belt retractor pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.

A shorting bar used within the seat belt retractor pretensioner connector which will short together both seat belt retractor pretensioner high and low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the inflator module during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

B001A 01, B001B 01

The seat belt retractor pretensioner high and/or low circuit is short to voltage for 120 milliseconds.

B001A 02, B001B 02

The seat belt retractor pretensioner high and/or low circuit is short to ground for 120 milliseconds.

B001A 04, B001B 04

The seat belt retractor pretensioner high and/or low circuit is open for 120 milliseconds.

B001A 0D, B001B 0D

The seat belt retractor pretensioner deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

B001A 0E, B001B 0E

The seat belt retractor pretensioner deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

Action Taken When the DTC Sets

* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

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 A/C Compressor Clutch

Description and Operation

SIR System Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Special Tools

Each seat belt retractor pretensioner requires a specific adapter to connect the load tool to the SIR system.

* J-38715-A - Driver and Passenger SIR Load Tool

* J-38715-30A - SIR Load Tool Adapter

Circuit/System Testing

Note: Refer to SIR Service Precautions Technician Safety Information.

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

* Seat belt retractor pretensioner

* SDM

* Seat belt retractor wiring harness connector

* SDM wiring harness connector

Note: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shoring-bars within the connector allowing the deployment circuit to operate properly.

1. Verify that the inflatable restraint seat belt retractor pretensioner connector and CPA are engaged.

• If the above condition is not found, make the appropriate repair.

2. Ignition OFF, disconnect the harness connector at the appropriate seat belt retractor pretensioner.

3. Connect the J-38715-30A - SIR Load Tool Adapter and the J-38715-A - Driver and Passenger SIR Load Tool in place of the seat belt retractor pretensioner.

4. Ignition ON, with a scan tool, verify that DTC B001A is set as current.

• If the DTC is not set or is set as history, cycle the ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the seat belt retractor pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the pretensioner, replace the seat belt retractor pretensioner.

5. Ignition OFF, disconnect the load tool and the adapter.

6. Disconnect the harness connector at the seat belt retractor pretensioner.

7. Ignition ON, test for less than 1.0 V between the low control circuit terminal 2 and ground.

• If greater than the specified range, test the control circuit for a short to voltage.

8. Ignition ON, test for less than 1.0 V between the high control circuit terminal 1 and ground.

• If greater than the specified range, test the control circuit for a short to voltage.

9. Ignition OFF, test for infinite resistance between the low control circuit terminal 2 and ground.

• If less than the specified value, test the control circuit for a short to ground.

10. Ignition OFF, test for infinite resistance between the high control circuit terminal 1 and ground.

• If less than the specified value, test the control circuit for a short to ground.

11. Test for less than 1.0 ohms between the low control circuit terminal 2 and the SDM terminal 38 X2 (driver) or terminal 39 X2 (passenger).

• If greater than the specified range, test the control circuit for an open/high resistance.

12. Test for less than 1.0 ohms between the high control circuit terminal 1 and the SDM terminal 37 X2 (driver) or terminal 40 X2 (passenger).

• If greater than the specified range, test the control circuit for an open/high resistance.

13. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Seat Belt Retractor Pretensioner Replacement - Front Removal and Replacement

* Control Module References Programming and Relearning for SDM replacement, programming, and setup

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