B0081

Code

Generic B — Body

First Row Center Seat Belt Load Limiter Deployment Control

Brand: Generic

Type: B — Body

Views: UK: 22 EN: 42 RU: 33

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Load limiter has deployed in a crash (single‑use pyrotechnic device)
Open circuit or short in the load limiter/squib wiring harness
Poor or corroded connector(s) under/around the seat
Faulty seat belt load limiter assembly (internal fault)
Supplemental Restraint System (SRS) control module detecting inconsistent/invalid signal
Water intrusion or physical damage to seat or wiring

Symptoms

SRS warning light (airbag light) illuminated on instrument panel
Possible seat belt warning lamp or chime for center seat
Stored crash data or additional SRS-related DTCs present
Seat belt may not retract or may show visible damage/scorching if deployed
Vehicle may inhibit airbag/pretensioner functions for affected circuits

What to check

Use an OEM‑level scan tool to read all SRS/airbag modules and freeze‑frame/crash data
Check for additional SRS DTCs and active/inactive status
Visually inspect the center seat belt (buckle, webbing and anchor) for signs of deployment: tears, melting, soot, or deformation
Inspect connectors and harness under the center seat and adjacent trim for damage, corrosion, or loose pins
Verify battery voltage and grounding to rule out low voltage issues
Measure continuity/resistance of the load limiter/squib circuit per manufacturer procedure (expect continuity when intact; open after deployment)

Signal parameters

Intact load limiter: low resistance/continuity in deployment circuit (manufacturer spec varies)
After deployment: circuit typically shows open/high resistance (no continuity)
Fault condition may present as short to ground or short to battery (low resistance to GND or B+)
SRS module will flag deployment event or circuit fault and log freeze‑frame data and timestamp
Voltage on SRS squib circuits typically present only during diagnostic/activation events; do not apply external voltage to squib circuit

Diagnostic algorithm

Read and record all SRS codes and freeze‑frame/crash data with a qualified scan tool; do not clear codes yet.
Verify vehicle history for a recent collision or deployment; visually inspect center seat belt for deployment signs (soot, distortion, torn webbing).
With battery disconnected and following manufacturer SRS safety wait time, visually inspect connectors and harness under the seat for damage, corrosion, or disconnected plugs.
Reconnect battery, retrieve live data with scan tool and monitor the load limiter/squib circuit status while an assistant operates buckle/seat adjustment (no deployment).
Measure circuit continuity/resistance between the SRS module connector and the load limiter connector per manufacturer procedure; compare to spec. Expect continuity when intact and an open circuit if deployed. Do not attempt to fire or bench‑test a squib with external power.
If wiring or connector fault found, repair/replace damaged wiring or connectors and secure harness routing; then clear codes and recheck.
If load limiter shows open circuit or physical deployment signs, replace the seat belt load limiter/assembly (single‑use) and any associated hardware per OEM SRS replacement procedure.
If wiring and component tests OK, follow manufacturer guidance for SRS module diagnostics — inspect connectors at SRS module, verify grounds, and update or replace module if directed by tech data.
After repairs, clear codes, perform SRS system readiness checks with scan tool and confirm no new DTCs. If required, perform post‑repair SRS self‑tests or seat occupancy system calibrations per manufacturer instructions.
Safety note: Follow all OEM SRS safety procedures (battery disconnect, specified wait times, no smoking, wear PPE). Pyrotechnic devices are single‑use and must be replaced, not repaired.

Likely causes

Load limiter physically deployed and now open‑circuited
Broken or pinched wiring in the harness under the seat
Corroded or disconnected connector at the seat buckle or load limiter
Faulty SRS control module input or grounding issue causing false detection
Aftermarket seat/repair or improper reinstallation affecting wiring or connector seating

Fault status

⚠️ Status

SRS system reports deployment or circuit fault in first‑row center seat belt load limiter. Possible deployed pyrotechnic device or electrical open/short in the load‑limiter circuit. SRS warning light active; repair/replace load limiter or repair wiring/connectors and validate system.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours