• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Seat Belt Pretensioner - RF High Circuit | B0059 | B0059 | B0058 | B0057 |
Seat Belt Pretensioner - RF Low Circuit | B0059 | B0059 | B0058 | B0057 |
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.
Ignition voltage is between 9-16 volts.
The seat belt pretensioner - RF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
• | Seat belt pretensioner - RF high circuit is less than 2.4 volts and the seat belt pretensioner - RF deployment loop is more than 6 ohms for 500 milliseconds. |
• | Seat belt pretensioner - RF deployment loop resistance is more than 4.8 ohms for 500 milliseconds. |
• | Seat belt pretensioner - RF high and/or low circuits is short to ground or short to voltage for 500 milliseconds. |
• | Seat belt pretensioner - RF high circuit is less than 2.4 volts and seat belt pretensioner - RF deployment loop resistance is less than 6 ohms for 500 milliseconds. |
• | The SDM commands the AIR BAG indicator ON via serial data communications. |
• | The SIR system is disabled and no deployments are allowed. |
• | The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used. |
• | A history DTC will clear once 255 malfunction-free ignition cycles have occurred. |
If there is more than one DTC set diagnose the open DTC first.
J 38715-A SIR Driver/Passenger Load tool
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
• The seat belt retractor pretensioner - RF • The SDM module • The seat belt retractor pretensioner - RF wiring harness connector • The SDM wiring harness connector
⇒ | If DTC B0057, B0058, or B0059 is history replace the seat belt pretensioner - RF. |
⇒ | If any of the above conditions are found make the appropriate repair. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for SDM replacement, setup, and programming |