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Home / DTC / B1B0C — PS.ABG squib(2) low

B1B0C — PS.ABG squib(2) low

Detailed page for trouble code B1B0C.

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Code

B1B0C

MITSUBISHI B — Body

PS.ABG squib(2) low

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

Causes

  • Short to ground in the passenger squib wiring
  • Internal short or failure inside the passenger airbag squib (igniter)
  • Corroded, loose or damaged connector at the airbag module or junction points
  • Damaged wiring harness (chafing, pinched, water ingress)
  • Faulty SRS (airbag) control module or driver transistor
  • Aftermarket seat components or repairs that disturbed airbag wiring

Symptoms

  • SRS / airbag warning light illuminated or flashing
  • Passenger airbag may be disabled (AIRBAG OFF or indicator)
  • Diagnostic trouble code B1B0C stored in SRS module
  • Possible intermittent or permanent loss of passenger-side deployment circuit

What to check

  • Read SRS module memory and note freeze-frame and any related codes
  • Verify vehicle battery voltage is stable before testing (low battery can affect readings)
  • Visually inspect passenger airbag connector(s), wiring harness under seat and dash for damage, corrosion, or loose pins
  • Inspect connectors at the passenger airbag module and seat harness junctions; look for bent pins or water ingress
  • Measure squib resistance at the airbag connector with ignition OFF and battery disconnected
  • Check continuity between the squib connector and the SRS module pin

Signal parameters

  • Typical passenger squib (igniter) resistance: roughly 2–5 ohms (varies by model). 'Low' condition often
  • Open/OL indicates open circuit; very low (
  • With ignition ON (and SRS powered) squib circuit voltages may be near battery voltage through module resistors — do not apply external power to the squib for testing
  • Compare measured values at the connector to manufacturer specification before concluding component failure

Diagnostic algorithm

  1. Safety first: disable the SRS system by disconnecting negative battery terminal and follow manufacturer recommended wait time for capacitor discharge (typically 10 minutes or per service manual). Use appropriate PPE.
  2. Retrieve and record all SRS codes and freeze-frame data with a scan tool.
  3. Visually inspect passenger airbag module connector(s), seat harness, and related ground points for corrosion, damage, or water intrusion.
  4. With battery disconnected, measure the resistance of the passenger squib at the airbag connector. Compare to factory spec. A very low resistance suggests a short; very high or open suggests open circuit.
  5. Check continuity and resistance from the squib connector back to the SRS control module pin to identify harness breaks or shorts to ground.
  6. Isolate wiring: disconnect connectors at in-line junctions and measure harness resistance segment-by-segment to locate short/damage.
  7. If harness and connectors check OK, consider replacing passenger airbag squib module and re-test. If squib replacement does not clear low reading, test or replace SRS control module per manufacturer guidance.
  8. After repairs, clear codes with a scan tool and perform system initialization/seat occupancy calibrations as required by the manufacturer. Verify SRS warning lamp extinguishes and re-check for stored codes.
  9. Note: do not deploy, bench-power, or short-circuit airbag squibs. Follow factory service manual procedures for handling and replacement of SRS components.

Likely causes

  • Short to ground in the passenger squib circuit (most likely)
  • Failed/shorted passenger airbag squib (igniter)
  • Damaged/poor connector or corroded terminal at seat/dash connector
  • Wiring harness damage under the seat or in dash routing
  • Less likely: SRS control module driver fault

Fault status

⚠️ Status
Passenger airbag squib (circuit 2) low — low-resistance/low-voltage fault detected on the passenger-side squib circuit; SRS warning lamp ON.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B0100 B0131 B1650 B1B0A B1B0B
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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