B0034

Code

Generic B — Body

SRS Airbag Squib Circuit Open

Brand: Generic

Type: B — Body

Views: UK: 27 EN: 66 RU: 26

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Broken or disconnected squib connector (loose, corroded, damaged pins)
Open wiring/harness between airbag module and airbag control module (chafing, cut, broken splice)
Faulty airbag (squib) or pretensioner with internal open circuit
Faulty airbag control module or connector
Damaged clock spring (steering wheel airbag circuits)

Symptoms

SRS/airbag warning lamp illuminated on instrument cluster
Airbag system shows disabled or faulted status in scan tool
Related airbags or seat belt pretensioners may be inoperative
Possible stored additional SRS codes (parity/communication)

What to check

Read SRS module with a capable scan tool, record freeze frame and related codes
Visually inspect connectors at the affected airbag(s), pretensioners and the airbag control module for corrosion, bent pins or damage
Inspect wiring harness routing for chafe points, crushed or pinched insulation
Check the clock spring (if driver airbag code) for damage or continuity faults
Verify battery voltage and system voltage during checks; low voltage can cause false faults
Do not attempt to fire or apply external power to a squib — risk of deployment and injury

Signal parameters

Squib circuit resistance: approximately 2–5 ohms when intact (varies by vehicle and component)
Open-circuit: very high/OL resistance (infinite) between squib connector pins
Short-to-ground/short-to-voltage: very low resistance (~0 ohms) if short present
Module reports circuit status (open/short/normal) via DTC and live data — use OEM scan tool for exact thresholds
Do not apply automotive battery voltage directly to squib (deployment hazard)

Diagnostic algorithm

Retrieve and record B0034 and any related SRS/communication codes with an SRS-capable scan tool.
Turn ignition OFF. Disconnect battery negative cable and wait manufacturer-specified time (commonly 90s–3 min) before touching SRS components.
Visually inspect the airbag connector and wiring at the affected location. Look for corrosion, bent pins, disconnected plugs, or damaged insulation.
With ignition OFF and battery disconnected, measure squib continuity and resistance at the connector near the airbag (not at the module) using a digital multimeter. Compare with manufacturer spec (typical low-ohm value).
If open at the connector, trace wiring toward the control module checking for continuity, splices, harness damage and grounds. Repair any damaged wiring or connectors.
If wiring and connectors check OK, inspect and test the clock spring (driver) or seat wiring for continuity. Replace clock spring if intermittent/open when turning wheel.
If the squib itself shows open and wiring is good, replace the airbag/squib or pretensioner assembly per manufacturer procedures.
After repairs, reconnect battery, clear codes with scan tool, cycle ignition and verify SRS lamp goes out and no reoccurrence of B0034. Perform final system check per OEM procedures.
If problem persists and wiring at both ends is confirmed good, consider replacing or reflashing the airbag control module as a last step and follow OEM module replacement/initialization procedures.

Likely causes

Open or disconnected connector at airbag or module (most common)
Damaged/chafed wiring harness to the squib
Failed squib/pyrotechnic component with internal open circuit
Faulty clock spring (for driver’s side) or seat wiring (for seat belt pretensioner)
Faulty airbag control module or poor ground/connector contact

Fault status

⚠️ Status

SRS Airbag Squib Circuit Open — open or discontinuous firing circuit detected; SRS lamp illuminated and affected airbag/pretensioner disabled until repaired.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2 hours