B0075 Code: Second Row Right Seat Belt Pretensioner Circuit Fault
The Diagnostic Trouble Code (DTC) B0075 indicates that the Supplemental Restraint System (SRS) has detected a fault in the right-side second-row seat belt pretensioner circuit. This component is designed to tighten the seat belt instantly during a collision, helping reduce occupant movement and improve safety.
What Does Code B0075 Mean?
When the Airbag Control Module detects an open circuit, short circuit, high resistance, or low resistance in the second-row right seat belt pretensioner circuit, it stores DTC B0075 and illuminates the Airbag or SRS warning light.
Possible Symptoms
- Airbag or SRS warning light is ON.
- B0075 stored in the SRS module.
- Seat belt pretensioner may be disabled.
- Airbag system may have reduced protection.
Common Causes
- Faulty second-row right seat belt pretensioner.
- Loose or damaged electrical connector.
- Open or shorted wiring harness.
- Corroded connector terminals.
- Faulty SRS control module (rare).
Diagnostic Procedure
- Scan the SRS system for all stored DTCs.
- Inspect the seat belt pretensioner connector for damage or corrosion.
- Check the wiring harness for cuts, pinched wires, or broken insulation.
- Verify connector terminals are clean and fully seated.
- Follow the manufacturer's wiring diagram before performing electrical tests.
Live Data Inspection
If your diagnostic scanner supports SRS live data, monitor the pretensioner status while checking the wiring harness. Compare the values with factory specifications. Any abnormal status or intermittent change may indicate a wiring or connector problem.
Important Safety Notice
Always disconnect the negative battery cable and wait at least 10 minutes before servicing any SRS component. Never apply external voltage or measure a pretensioner directly unless instructed by the manufacturer.