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Home / DTC / B1B0D — PS.ABG squib(2) high

B1B0D — PS.ABG squib(2) high

Detailed page for trouble code B1B0D.

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Code

B1B0D

MITSUBISHI B — Body

PS.ABG squib(2) high

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

Causes

  • Open circuit or very high resistance in the passenger airbag squib circuit
  • Connector corrosion, bent pins, or disconnected connector at the passenger airbag or SRS control module
  • Damaged wiring harness (chafing, broken conductor) between the airbag and SRS module
  • Short to battery voltage (B+) or other vehicle power source on the squib circuit
  • Faulty passenger airbag module (squib assembly)
  • Faulty SRS (airbag) control module or internal monitoring circuit

Symptoms

  • SRS/Airbag warning lamp illuminated on dash
  • Passenger airbag disabled or fault indicated (no airbag deployment until fixed)
  • Possible related faults for seatbelt pretensioner or occupancy sensor
  • DTC present in SRS module (stored and/or active)

What to check

  • Record all stored SRS codes with a scan tool before clearing.
  • Always follow vehicle manufacturer SRS safety procedures: disconnect battery negative and wait the specified time before touching airbag components.
  • Visual inspection of passenger airbag connector, seat harness, seat rails and related wiring for damage, corrosion, bent pins or water.
  • Inspect connectors at the SRS control module for secure fit and damage.
  • Measure continuity/resistance of the squib circuit with the airbag disconnected (see signal_params).
  • Check for unintended voltage on squib circuit with ignition on (only measure with proper procedure and warnings).

Signal parameters

  • Expected squib resistance (typical): ~2–5 ohms (varies by manufacturer).
  • Open-circuit indication: very high/OL (>>100 ohms).
  • Short-to-B+ indication: circuit shows battery voltage on the squib terminal with ignition on.
  • Short-to-ground indication: near 0 ohms to chassis ground.
  • Scan tool: SRS module may report 'squib circuit high' when measured voltage/resistance is above module threshold.

Diagnostic algorithm

  1. Read and record all SRS codes with a compatible scan tool; do not clear codes before diagnosing.
  2. Disconnect battery negative terminal and wait the manufacturer-specified time (typically several minutes) to allow system capacitors to discharge.
  3. Visually inspect passenger airbag connector, seat wiring, and harness routing for damage, corrosion, loose pins or water intrusion. Repair any obvious wiring/connector damage.
  4. With battery still disconnected, disconnect the passenger airbag connector and measure squib resistance at the airbag connector (not through the harness). Compare to expected manufacturer value (typically ~2–5 ohms).
  5. If squib resistance is out of specification (open or very high), replace the passenger airbag module. If resistance looks normal, proceed to step 6.
  6. Check continuity between the airbag connector and the SRS control module connector to locate opens or high-resistance sections in the harness. Repair any broken conductors or poor crimps.
  7. With ignition off and following safety procedure, check for unintended battery voltage on the squib circuit (if manufacturer procedure permits). A steady battery voltage indicates short to B+ and requires tracing/repair.
  8. After repairs, reconnect connectors, reconnect battery, clear codes with scan tool and perform SRS self-test. Confirm code does not return and SRS lamp extinguishes.
  9. If wiring and airbag assembly are good but the fault persists, consider SRS control module internal fault — consult manufacturer procedure for module bench testing or replacement.

Likely causes

  • Loose or corroded connector at the passenger airbag or seat harness
  • Broken wire in the harness under the seat or inside the door pillar
  • Airbag squib has increased resistance or partial open (age/damage)
  • Short to vehicle battery/ignition feed caused by pin pushed into housing
  • Water intrusion into seat connector or floor harness

Fault status

⚠️ Status
Passenger airbag squib (circuit 2) — high resistance/voltage fault detected. SRS system has flagged the passenger squib circuit; airbags may be disabled until fault is corrected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

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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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