B1879 Seat Belt Driver Pretensioner Circuit Short to Ground

OBD2 Code: B1879

Description: Seat belt driver pretensioner circuit short to ground.

Definition: This code indicates that there is a short circuit in the driver’s seat belt pretensioner wiring, which could prevent the airbag system from functioning properly in the event of a collision. The pretensioner is designed to tighten the seat belt during a crash, and a fault in this circuit can compromise vehicle safety systems.

B1879: Seat Belt Driver Pretensioner Circuit Short to Ground
Severity: Moderate

Common Causes

b1879 – Seat Belt Driver Pretensioner Circuit Short to Ground

Common Causes:

• Faulty seat belt driver pretensioner
• Short circuit in the wiring harness
• Poor electrical connection in the circuit

Common Misdiagnosis

OBD2 Code: B1879

Description: Seat Belt Driver Pretensioner Circuit Short to Ground

Common Misdiagnosis: Replacing the seat belt pretensioner without checking for wiring harness issues or connector problems.

Common Diagnostic Steps

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OBD2 Code: B1879

Description: Seat Belt Driver Pretensioner Circuit Short to Ground

• Inspect the seat belt pretensioner wiring for any signs of damage or wear.
• Check the connectors and pins for corrosion, loose connections, or bent pins.
• Use a multimeter to test the continuity of the pretensioner circuit to ensure there is no short to ground.
• Verify that the airbag control module is functioning correctly and has no stored faults related to the pretensioner circuit.
• If necessary, replace any damaged components such as wiring harnesses or connectors.
• Clear the code and perform a road test to confirm that the issue has been resolved.