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Home / DTC / B1460 — FR pretensioner squib short

B1460 — FR pretensioner squib short

Detailed page for trouble code B1460.

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B1460

MITSUBISHI B — Body

FR pretensioner squib short

Brand: MITSUBISHI
Type: B — Body
AI status
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Page language: EN

Causes

  • Shorted wiring in the front‑right pretensioner circuit (to battery positive or to ground).
  • Corroded or damaged connector at the pretensioner or SRS control unit.
  • Internal short inside the pretensioner squib (component failure).
  • Water ingress or contamination in the seat or connector area.
  • Poor repair or aftermarket work that damaged the harness or pins.
  • Faulty SRS control unit (less common).

Symptoms

  • SRS/airbag warning lamp illuminated on dash.
  • Possible loss of pretensioner function on front‑right seatbelt during a crash.
  • Other SRS-related features may be disabled until the fault is resolved.

What to check

  • Read and record all SRS fault codes with a capable scan tool; note freeze frame data.
  • Visually inspect front‑right seat, seatbelt pretensioner connector, and wiring path for damage, corrosion, or contamination.
  • Verify battery voltage and ground integrity before testing SRS circuits.
  • With battery disconnected (follow OEM SRS safety procedure), measure squib resistance at the pretensioner connector.
  • Inspect and test continuity between the pretensioner connector and SRS control unit pins.
  • Check for moisture or loose terminals in related connectors.

Signal parameters

  • Typical pretensioner squib resistance (manufacturer dependent): low resistance, commonly in the range ~0.5–5 Ω. (Open = very high/OL; internal short may be near 0 Ω).
  • No normal operating voltage should be present at squib when performing resistance checks — disconnect battery and follow safety procedures.
  • Fault set when measured values indicate short to power/ground or out-of-spec resistance compared with factory spec.

Diagnostic algorithm

  1. Retrieve B1460 and any other SRS codes; note when code was set and related freeze frame data.
  2. Follow OEM SRS safety procedure: switch ignition off, disconnect negative battery terminal, and wait the manufacturer specified time before working on SRS wiring or connectors.
  3. Visually inspect the FR pretensioner connector, seat harness (especially at hinge and under-seat routing), and related connectors for damage, pin deformation, corrosion, or contamination. Repair obvious damage.
  4. With the pretensioner connector unplugged and battery still disconnected, measure the resistance of the pretensioner squib across its two pins. Compare to factory specification. If resistance is extremely low (near 0 Ω) this indicates an internal short; if open/very high, indicates open circuit.
  5. Check continuity from pretensioner connector pins back to the SRS control unit pins to confirm wiring integrity and look for unwanted shorts to ground or battery. Wiggle harness while monitoring continuity to find intermittent faults.
  6. If a short to ground or power is found in the harness, isolate and repair/replace the damaged section and connectors. If wiring and connectors are good but squib resistance is out of spec, replace the pretensioner assembly.
  7. After repairs, reconnect battery, clear codes with a scan tool, and perform SRS self-test to confirm the B1460 does not return. If code returns, consider SRS control unit diagnosis or replacement per factory procedure.
  8. Safety note: Always follow the vehicle manufacturer’s SRS handling and repair procedures. Do not simulate or apply power to squib circuits with connectors connected to the pretensioner; accidental deployment risk exists.

Likely causes

  • Damaged harness at the seat hinge or under the seat (pinched/abraded wires).
  • Connector pin corrosion/short at the pretensioner plug.
  • Pretensioner module internal short from prior deployment or impact.
  • Water or debris in the seat connector after cleaning or a spill.

Fault status

⚠️ Status
Front‑right seatbelt pretensioner squib short detected — SRS lamp ON. Repair required before normal airbag pretensioner operation is restored.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5–2.0 hours

Similar codes

B1450 B1461 B1480 B1100 B1770
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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