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 provide an overview of each diagnostic category. |
DTC Descriptors
DTC B001A 01: Driver Pretensioner Deployment Loop Short to BatteryDTC B001A 02: Driver Pretensioner Deployment Loop Short to Ground
DTC B001A 08: Driver Pretensioner Deployment Loop Signal Invalid
DTC B001A 0D: Driver Pretensioner Deployment Loop Resistance Above Threshold
DTC B001A 0E: Driver Pretensioner Deployment Loop Resistance Below Threshold
Diagnostic Fault Information
Circuit | Short to Ground | Low Resistance | High Resistance | Open | Short to Voltage |
|---|---|---|---|---|---|
Driver Seat Belt Pretensioner - High Control | B001A 02 | B001A 0E | B001A 0D | B001A 08 | B001A 01 |
Driver Seat Belt Pretensioner - Low Control | B001A 02 | B001A 0E | B001A 0D | B001A 08 | B001A 01 |
Passenger Seat Belt Pretensioner - High Control | B001B 02 | B001B 0E | B001B 0D | B001B 08 | B001B 01 |
Passenger Seat Belt Pretensioner - Low Control | B001B 02 | B001B 0E | B001B 0D | B001B 08 | B001B 01 |
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 driver 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.
A shorting bar used within the driver seat belt pretensioner connector which will short together both driver seat belt 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 volts.
Conditions for Setting the DTC
B001A 01
The driver seat belt pretensioner high and/or low control circuit is shorted to voltage for 250 milliseconds.
B001A 02
The driver seat belt pretensioner high and/or low control circuit is shorted to ground for 250 milliseconds.
B001A 08
The driver seat belt pretensioner high and/or low control circuit is open for 250 milliseconds.
B001A 0D
The driver seat belt pretensioner deployment loop resistance is more than 3.9 ohms for 250 milliseconds.
B001A 0E
The driver seat belt pretensioner deployment loop resistance is less than 1.1 ohms for 250 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
Connector End View Reference
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Special Tools
J 38715-A Driver and Passenger SIR Load Tool
Circuit/System Testing
Important: Refer to SIR Service Precautions.
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 shorting-bars within the connector allowing the deployment circuit to operate properly.
- Ignition OFF, disconnect the harness connector at the driver inflatable restraint seat belt pretensioner.
- Connect the load tool adaptor J 38715-A in place of the driver inflatable restraint seat belt pretensioner.
- Ignition ON, with a scan tool, verify that DTC B001A is set as current.
- Ignition OFF, disconnect the load tool and the adapter.
- Disconnect the X2 harness connector at the SDM.
- Ignition ON, test for less than 1.0 volt between the control circuit terminal 1 and ground.
- Ignition ON, test for less than 1.0 volt between the control circuit terminal 2 and ground.
- Ignition OFF, test for infinite resistance between the control circuit terminal 1 and ground.
- Ignition OFF, test for infinite resistance between the control circuit terminal 2 and ground.
- Test for less than 1.0 ohm between the control circuit terminal 1 and SDM terminal 12 X2.
- Test for less than 1.0 ohm between the control circuit terminal 2 and SDM terminal 11 X2.
- If all circuits test normal, replace the SDM.
| ⇒ | 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 driver inflatable restraint seat belt pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the pretensioner, replace the driver inflatable restraint seat belt pretensioner. |
| ⇒ | If greater than the specified range, test the control circuit for a short to voltage. |
| ⇒ | If greater than the specified range, test the control circuit for a short to voltage. |
| ⇒ | If less than the specified value, test the control circuit for a short to ground. |
| ⇒ | If less than the specified value, test the control circuit for a short to ground. |
| ⇒ | If greater than the specified range, test the control circuit for an open/high resistance. |
| ⇒ | If greater than the specified range, test the control circuit for an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for SDM replacement, setup, and programming |
