B0049

Code

Generic B — Body

Third Row Right Frontal Stage 1 Deployment Control

Brand: Generic

Type: B — Body

Views: UK: 20 EN: 41 RU: 26

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Page language: EN

Open or short in Stage 1 squib wiring (third-row right frontal)
Poor or corroded connector at airbag module, junction, or seat/seatbelt harness
Faulty Stage 1 squib (airbag inflator/resistor)
Faulty Supplemental Restraint System (SRS/SDM) control module
Water intrusion or physical damage to wiring or connector
Intermittent fault due to chafing, broken wire, or improper repair after a crash

SRS / airbag warning lamp illuminated or flashing
Related airbag(s) may be disabled; possible loss of Stage 1 deployment function for third-row right frontal position
Vehicle may show reduced safety restraint readiness for affected position
Possible DTCs stored in SRS control module

Read SRS codes and freeze-frame data with a compatible scan tool
Verify manufacturer-specified SRS disable procedure (disconnect battery and wait required time) before handling SRS components
Visual inspection of third-row right frontal airbag connector, wiring harness, and nearby junctions for damage, corrosion, or water ingress
Check connectors at SRS control module for corrosion, loose pins, or bent terminals
Perform wiggle/inspection test of wiring with ignition off and battery disconnected to look for intermittent faults (do not energize squib during continuity tests)
Confirm if vehicle has been in a crash or prior repairs involving SRS components

Expected Stage 1 squib resistance (typical) ~0.5–5 ohms (manufacturer-specific — consult service manual)
Open circuit: infinite resistance (OL) between squib terminals
Short-to-ground: near 0 ohms between squib circuit and chassis ground
Continuity expected from SRS module Stage 1 output to squib connector when harness disconnected (with battery disconnected)

Connect a diagnostic scan tool and record all SRS codes and freeze-frame data; note any related B-codes.
Follow safe SRS procedures: disable SRS power per manufacturer instructions (disconnect battery and wait the specified SRS discharge time, commonly ≈90 seconds).
Perform a careful visual inspection of the third-row right frontal airbag, connector, and harness routing for damage, corrosion, repair splices, or water intrusion.
With the battery disconnected, measure squib resistance at the airbag connector and compare to manufacturer spec. An open or very high resistance indicates a failed squib or open wiring; near 0 ohms indicates a short.
Check continuity/resistance between the squib connector and the SRS control module output pins to isolate harness vs. squib failure.
Inspect and test connectors at the SRS module for terminal damage or poor grounds; repair or replace damaged connectors or wiring as required.
If wiring and connectors are good but resistance is out of spec, replace the airbag (squib) assembly for that position per manufacturer instructions.
If squib and harness test good, suspect SRS control module fault; perform module bench or replacement testing per manufacturer procedures.
After repairs, clear codes and perform SRS system self-test; verify no recurrence of B0049 and that the SRS warning lamp behaves normally.