B003A

Code

Generic B — Body

Second Row Right Frontal Stage 2 Deployment Control

Brand: Generic

Type: B — Body

Views: UK: 21 EN: 27 RU: 16

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Open or shorted squib (stage 2 pyrotechnic element) in the second-row right frontal airbag
Damaged, corroded or disconnected wiring harness or connector at the seat/airbag
Poor connection or corrosion at the airbag control module (SRS/ACM) connector
Short to battery or chassis ground in the deployment circuit
Faulty airbag control module or internal driver circuitry
Previous deployment not fully repaired or connector pins bent

Airbag warning (SRS) light illuminated on instrument panel
DTC B003A stored in the SRS/airbag control module
Related occupant protection functions for the second-row right seat may be disabled
Possible failed readiness/vehicle inspection checks for SRS system
No visible deployment (this code alone does not indicate deployment)

Read and record all stored SRS trouble codes and freeze frame data with a diagnostic scanner
Verify battery voltage (11–15 V) and good charging system before tests
Visually inspect wiring and connectors for the second-row right seat airbag (look for damage, corrosion, water)
Check that airbag and harness connectors are fully seated and locking tabs engaged
Measure squib circuit continuity and resistance against manufacturer specification
Perform short-to-power and short-to-ground checks on the circuit

Squib circuit resistance (expected: low ohms typical for pyrotechnic squibs; compare to manufacturer spec)
Circuit continuity (open = infinite Ω)
Voltage on squib circuit with ignition ON (should be near 0 V, active driver output only during deployment)
Battery voltage during faults (freeze frame)
Presence/absence of communication with SRS/airbag control module over vehicle network

Use a qualified scan tool to read and record B003A and any related SRS codes; save freeze frame data.
Follow vehicle manufacturer SRS safety procedures before touching airbag components (disable SRS, remove negative battery terminal, wait specified discharge time).
Visually inspect the second-row right seat, airbag module, connector and wiring harness for damage, corrosion, or water intrusion.
With SRS disabled and per manufacturer procedure, disconnect the squib connector and measure resistance of the stage-2 squib. Compare to specification (open = damaged squib/harness; very low ≈ short).
Perform continuity tests from the SRS module pin to the squib connector to detect open or high-resistance joints; wiggle harness while monitoring to find intermittent faults.
Check for short to power or ground: isolate circuit and measure resistance to battery positive and chassis ground.
Inspect SRS module connector pins for corrosion, bent pins or proper mating; if suspect, verify driver output with manufacturer-approved procedures or replace module if confirmed faulty.
If wiring and squib test within spec, consider module/software faults — verify module firmware and replacement history; repair or replace failed components as required.
After repairs, clear codes, perform self-tests with scan tool, and verify SRS lamp extinguishes and code does not return. Reassemble and perform final system check per manufacturer.

High resistance or open circuit in the right second-row stage-2 squib circuit (broken wire, open connector)
Low resistance (short to ground/power) caused by chafed harness or exposed conductor
Corroded connector terminals at the seat or module
Faulty SRS/airbag module output driver for the stage-2 circuit
Connector plugged into the wrong location or improper service reassembly after repairs