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Home / DTC / B1441 — FR curtain ABG squib open

B1441 — FR curtain ABG squib open

Detailed page for trouble code B1441.

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Code

B1441

MITSUBISHI B — Body

FR curtain ABG squib open

Brand: MITSUBISHI
Type: B — Body
AI status
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ready
Completed 100%
Page language: EN

Causes

  • Open circuit (broken wire) in front curtain squib harness
  • Disconnected, loose or corroded connector at the curtain airbag or ECU
  • Damaged curtain airbag module or squib element
  • Poor/crushed wiring where harness runs (A‑pillar/roof rail/B‑pillar areas)
  • Faulty airbag (SRS) control module or internal connector fault

Symptoms

  • SRS / airbag warning lamp illuminated on instrument cluster
  • Possible disablement of one or more airbag functions (front curtain)
  • Stored fault code B1441 in SRS ECU
  • Vehicle may show other related SRS codes

What to check

  • Use a diagnostic scan tool to confirm B1441 and read any related airbag codes and freeze frame data
  • Visually inspect curtain airbag connectors, harness routing along A‑pillar, roof rail and B‑pillar for damage or disconnection
  • Inspect connector terminals for corrosion, bent pins or pushed‑out terminals
  • With vehicle power removed, check continuity of the squib circuit from the airbag connector back to the SRS ECU
  • Measure squib resistance with battery disconnected (see safety notes) — expected low resistance (manufacturer dependent). An open/infinite reading indicates an open circuit

Signal parameters

  • Squib circuit resistance (ohms) — typical squib resistance is low (often ~2–5 Ω); open = infinite Ω
  • Connector continuity (pass/fail) between squib and SRS ECU
  • SRS ECU fault status and freeze frame data
  • Voltage at connector with key on (no deployment) — typically no drive voltage; presence of abnormal voltage indicates ECU/wiring faults

Diagnostic algorithm

  1. Verify the code with an OBD/SRS scan tool and record any additional SRS codes and freeze frame data
  2. Follow manufacturer SRS safety procedure: disable battery negative, follow required wait time for residual charge (refer to service manual) before touching SRS connectors
  3. Visually inspect curtain airbag connectors and wiring along the roof rail, A‑pillar and B‑pillar for damage, chafing, bent pins or corrosion
  4. With battery disconnected, measure continuity between the curtain airbag connector and the SRS ECU connector. Replace or repair any open wiring or poor crimps
  5. Measure resistance of the curtain squib with the battery disconnected. If resistance is infinite (open) replace the curtain airbag assembly or squib as specified by manufacturer
  6. If wiring and squib measure correctly, inspect/replace connector terminals and repair harness. Reconnect and clear codes with scan tool, then cycle ignition to verify code does not return
  7. If fault persists after wiring and connector repair, suspect SRS ECU internal fault — refer to manufacturer procedures for ECU testing or replacement
  8. After repairs, perform SRS system checks per service manual and confirm no additional DTCs; verify SRS lamp goes out during power‑up

Likely causes

  • Connector unplugged at curtain airbag (after interior repair)
  • Wiring damaged by door hinge, trim removal or previous collision repair
  • Corroded terminal in squib connector
  • Failed curtain airbag inflator/squib element

Fault status

⚠️ Status
SRS control module detected an open circuit in the front curtain airbag squib circuit. Fault stored and SRS lamp illuminated; curtain airbag circuit may be disabled until repaired.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1442 B0101 B0121 B1451 B1490
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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