B105E

Code

LAND ROVER B — Body

Seat exit of the seat inflatable

Brand: LAND ROVER

Type: B — Body

Views: UK: 19 EN: 32 RU: 24

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Page language: EN

Causes

Open or short in the seat inflatable (squib/pretensioner) wiring
Corroded, loose or damaged connector at the seat or seat module
Failed/inoperative seat inflator (squib) or seatbelt inflatable component
Faulty seat occupant detection / seat module or SRS control module
Water ingress or contamination under the seat
Previous deployment not properly repaired or connector not reconnected

Symptoms

Airbag / SRS warning lamp illuminated on the dash
Seat inflatable (side airbag/seatbelt inflator) may be disabled
Possible stored additional SRS fault codes
Intermittent SRS lamp or faults that change with seat position or movement

What to check

Read SRS memory with a manufacturer-capable scan tool; record all codes and freeze-frame data
Visually inspect harness and connectors under the seat for damage, corrosion or water
Check that seat is correctly seated on rails and connectors to seat module are engaged
Measure squib/inflator continuity and resistance at the seat connector with ignition off (see signal params)
Verify supply and ground voltages to the seat module and continuity to the SRS control module
Inspect for evidence of previous deployment (cut wires, replaced parts) and correct repairs

Signal parameters

Battery voltage to seat SRS circuits: ~11–14 V with ignition ON (manufacturer-specific)
Typical intact squib/inflator resistance: low ohms (commonly ~1–5 Ω) — consult OEM spec
Open circuit (OL) indicates broken wire or disconnected inflator; near 0 Ω indicates short
CAN/diagnostic communication: seat module should report status codes and inflator circuit state
Live data: seat module status flag for inflatable circuit (OK / FAULT) if supported

Diagnostic algorithm

Read and record B105E and any other SRS codes and freeze frame data with a calibrated scan tool.
Do a visual inspection: remove trim as required and inspect seat harnesses, fasteners and connectors for damage, corrosion or water.
With ignition OFF and battery disconnected per manufacturer safety procedure, unplug the seat connector and inspect pins; repair any damaged pins or terminals.
Measure resistance of the seat inflator/squib between the inflator pins at the connector. Compare to OEM specification (an open or short is a fault).
Check continuity and insulation between inflator wires and vehicle ground/supply to identify shorts to chassis or battery.
Reconnect and restore battery; use a diagnostic tool to command SRS self-tests and monitor live data while exercising seat position if required.
If wiring and connector repairs correct the fault, clear codes and confirm they do not return after cycling ignition and road test.
If fault persists and wiring/connector and inflator test within spec, consider replacing the seat module or the seat inflator assembly and perform required SRS module coding/initialization per OEM procedure.
After any repair, perform a full SRS system check and ensure the airbag warning lamp extinguishes and no new codes are stored.

Likely causes

Broken wire or pinched harness under seat (open circuit)
Direct short to ground or battery on the squib/pretensioner line
Corroded connector at the seat airbag harness
Damaged or deployed seat inflator needing replacement
Faulty seat module or clocking/calibration mismatch with SRS control module

Fault status

⚠️ Status

Stored DTC B105E — Seat inflatable circuit fault detected. SRS lamp likely illuminated; seat inflatable may be disabled until repair.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2 hours

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