B001B
DTC B001B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provide an overview of each diagnostic category.
DTC Descriptors
DTC B001B 01
- Right Front Seat Belt Pretensioner Deployment Loop Short to Battery
DTC B001B 02
- Right Front Seat Belt Pretensioner Deployment Loop Short to Ground
DTC B001B 04
- Right Front Seat Belt Pretensioner Deployment Loop Open Circuit
DTC B001B 0D
- Right Front Seat Belt Pretensioner Deployment Loop Resistance Above Threshold
DTC B001B 0E
- Right Front Seat Belt 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 pretensioner - RF. 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 pretensioner - RF connector which will short together both seat belt pretensioner - RF 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 volts.
Conditions for Setting the DTC
B001B 01
The seat belt pretensioner - RF high and/or low circuit is short to voltage for 120 milliseconds.
B001B 02
The seat belt pretensioner - RF high and/or low circuit is short to ground for 120 milliseconds.
B001B 04
The seat belt pretensioner - RF high and/or low circuit is open for 120 milliseconds.
B001B 0D
The seat belt pretensioner - RF deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
B001B 0E
The seat belt pretensioner - RF 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 (Connector Views)
Description and Operation
SIR System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
Special Tools
Each inflatable restraint module 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
* SA9409Z-A SIR Load Tool (Driver/Passenger/Curtain)
Circuit/System Testing
Important: 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:
* Inflatable restraint seat belt pretensioner
* SDM module
* Front end sensor wiring harness connector
* SDM wiring harness connector
Important: 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 RF inflatable restraint seat belt 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 RF inflatable restraint seat belt pretensioner.
3. Connect the load tool adaptor SA9409Z-A in place of the LF inflatable restraint seat belt pretensioner.
4. Ignition ON, with a scan tool, verify that DTC B001B 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 RF inflatable restraint seat belt pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the pretensioner, replace the RF inflatable restraint seat belt pretensioner.
5. Ignition OFF, disconnect the load tool and the adapter.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1.0 volt between the low control circuit terminal 27 and ground.
• If not within the specified range, test the control circuit for a short to voltage.
8. Ignition ON, test for less than 1.0 volt between the high control circuit terminal 26 and ground.
• If not within 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 27 and ground.
• If not within the specified range, test the control circuit for a short to ground.
10. Ignition OFF, test for infinite resistance between the high control circuit terminal 26 and ground.
• If not within the specified range, test the control circuit for a short to ground.
11. Test for less than 1.0 ohm between the low control circuit terminal 1 and the SDM terminal 27.
• If not within the specified range, test the control circuit for an open/high resistance.
12. Test for less than 1.0 ohm between the high control circuit terminal 2 and the SDM terminal 26.
• If not within 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 diagnostic procedure.
* Driver or Passenger Seat Belt Buckle Replacement (Driver or Passenger Seat Belt Buckle Replacement)
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Control Module References (Programming and Relearning)for SDM replacement, setup, and programming