B1876 - Seat Belt Driver Pretensioner Circuit Failure

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Seat Belt Driver Pretensioner
  • Seat Belt Driver Pretensioner harness is open or shorted
  • Seat Belt Driver Pretensioner circuit poor electrical connection
  • Faulty Restraints Control Module (RCM)

Possible symptoms

  • Air Bag Warning Light ON

B1876 Description

The Restraints Control Module (RCM) checks all of the safety Seat Belt Pretensioners for faults. If the RCM detects a low resistance or open on the Driver Safety Seat Belt Pretensioner circuits, it will store the Diagnostic Trouble Code (DTC) B1876 in memory and illuminate the air bag warning indicator.
OBDII Code B1876 - Seat Belt Driver Pretensioner Circuit Failure - AutoCodes.com

B1876 Information for specific makes

  • B1876 FORD Seat Belt Driver Pretensioner Circuit Failure
  • B1876 LINCOLN Seat Belt Driver Pretensioner Circuit Failure
  • B1876 MAZDA Seat Belt Driver Pretensioner Circuit Failure
  • B1876 MERCURY Seat Belt Driver Pretensioner Circuit Failure

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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