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Home / DTC / B1B0F — PS.ABG squib(2) short

B1B0F — PS.ABG squib(2) short

Detailed page for trouble code B1B0F.

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B1B0F

MITSUBISHI B — Body

PS.ABG squib(2) short

Brand: MITSUBISHI
Type: B — Body
Views: UK: 20 EN: 28 RU: 20
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Page language: EN

Causes

  • Short circuit in passenger airbag squib wiring (pinched, chafed, or damaged insulation)
  • Corroded or poorly seated connector at the passenger airbag or SRS ECU
  • Faulty passenger airbag (squib) assembly
  • Short to chassis ground or vehicle power in the squib harness
  • Aftermarket accessories or repairs that disturbed the SRS wiring
  • Faulty SRS control module (less common)

Symptoms

  • SRS / airbag warning lamp illuminated on instrument cluster
  • Passenger airbag status may show as disabled (if vehicle shows this)
  • Possible multiple SRS faults stored
  • No other drivability symptoms — fault related to restraint system only
  • Intermittent lamp if wiring is moving/shorting

What to check

  • Read and record all SRS codes and freeze-frame data with a capable scan tool
  • Confirm battery voltage is stable before testing (use proper test equipment)
  • Visual inspection of passenger airbag connector and harness (under seat and in dash) for damage, corrosion or pinched wiring
  • Check for signs of recent deployment or repairs to the airbag assembly
  • Inspect for aftermarket devices or wiring routed near seat tracks
  • Verify vehicle ground points and chassis connections near the passenger seat area

Signal parameters

  • Typical intact airbag squib resistance (manufacturer-dependent) is low — often in the single-digit ohms (commonly ~1–5 Ω). Refer to factory data for exact value.
  • Short condition: measured resistance much lower than expected or near 0 Ω between squib pins
  • Open condition: very high resistance or infinite (OL) indicating open circuit
  • Supply voltage to SRS system: nominal battery voltage (12–14 V) when powered; avoid energizing squib circuits during troubleshooting
  • Diagnostic tool will report short-type fault and may show circuit current/voltage if capable

Diagnostic algorithm

  1. CAUTION: Follow manufacturer SRS safety procedures. Disconnect the negative battery terminal and wait the manufacturer-specified time before working on the SRS system. Use static-safe handling and do not probe airbag connectors with the ignition powered.
  2. Use a scan tool to read all SRS codes and note occurrences and freeze-frame data. Attempt to clear the code and see if it returns.
  3. Visually inspect the passenger airbag connector, harness routing (especially under the seat and through seat frame), and any nearby connectors for damage, corrosion, loose pins, or foreign objects.
  4. With battery disconnected and SRS capacitors discharged per procedure, disconnect the passenger airbag connector and measure squib resistance at the airbag connector. Compare to factory specification. Do not attempt to fire the squib.
  5. If resistance is abnormally low (indicates short), isolate harness sections and measure resistance to chassis ground and to battery positive to locate short. Repair/replace damaged wiring or repair pinched insulation.
  6. If airbag connector and wiring check ok, check continuity between the squib connector and the SRS ECU connector. Repair any open or shorted sections.
  7. Inspect and test mating connectors at the SRS ECU for bent pins or corrosion. Replace connector or pigtails if necessary.
  8. If wiring and connectors are verified good and squib resistance still abnormal, replace the passenger airbag (squib).
  9. After repairs, reconnect battery, clear codes with scan tool, and perform SRS system self-test. Confirm code does not return and SRS warning lamp functions normally.
  10. If fault persists after wiring and component replacement, consider SRS control module fault and consult factory diagnostic flow for ECU testing or replacement.

Likely causes

  • Harness under or behind passenger seat pinched by seat tracks causing insulation wear
  • Connector contact corrosion or bent pins at the airbag connector
  • Low resistance due to accidental short to ground from damaged wire
  • Recent interior work (seat removal, carpeting, audio) disturbed wiring
  • Damaged airbag squib from prior crash or incorrect replacement

Fault status

⚠️ Status
Passenger airbag squib (2) short detected by SRS control unit. Possible short to ground or low-resistance fault in passenger airbag circuit; system may disable passenger airbag and illuminate SRS warning lamp.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1A0F B1B0E B1100 B1600 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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