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Home / DTC / B1614 — PS preten.active circuit open

B1614 — PS preten.active circuit open

Detailed page for trouble code B1614.

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Code

B1614

MITSUBISHI B — Body

PS preten.active circuit open

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

Causes

  • Open or broken wiring in the pretensioner active/firing circuit
  • Disconnected, bent or corroded connector at pretensioner or SRS ECU
  • Failed pretensioner squib (open internal connection)
  • Poor/cracked insulation causing intermittent open under movement
  • Faulty SRS control module or internal connector

Symptoms

  • SRS / airbag warning lamp illuminated on dash
  • Seat belt pretensioner may not deploy in a crash (safety risk)
  • Possible intermittent SRS lamp if connector makes/breaks contact
  • Vehicle may fail safety inspections due to SRS fault

What to check

  • Read and record stored DTCs and freeze frame data with an appropriate scan tool
  • Visual inspection of passenger seat pretensioner connector, wiring harness and seat mounting area for damage or corrosion
  • Check SRS warning lamp behaviour and any related codes (other B-codes)
  • Measure continuity/resistance of pretensioner squib with battery disconnected (see safety notes below)
  • Check continuity between pretensioner connector and SRS control module connector pins
  • Inspect SRS ECU connectors for bent pins, corrosion or water ingress

Signal parameters

  • Expected squib resistance (passenger pretensioner): typically about 0.5–5 ohms (manufacturer-specific). Compare to service manual value.
  • Open-circuit = infinite resistance (OL) or very high resistance
  • Short-to-ground = near 0 ohms between circuit and chassis ground (different fault)
  • Connector voltage: with ignition on and system in normal state there is no firing voltage at the squib pin; do NOT attempt to apply firing voltage. Battery voltage may be present on supply/monitor lines only per manufacturer procedure
  • Diagnostic tester should report nominal circuit monitoring voltage/current per OEM specs

Diagnostic algorithm

  1. Read/record DTCs: Use a capable scan tool to confirm B1614 and note any additional SRS codes or freeze frame data.
  2. Safety first: Disable the supplemental restraint system power. Disconnect negative battery terminal and wait at least the time specified in the service manual (commonly 3–10 minutes) before touching airbag/pretensioner connectors.
  3. Visual inspection: Remove trim to access passenger pretensioner connector and wiring. Look for loose connectors, corrosion, pin damage, broken wires, or chafed insulation.
  4. Connector check: With battery still disconnected, disconnect the pretensioner connector. Inspect terminals for corrosion or damage and re-seat the connector.
  5. Resistance check: Measure resistance across the pretensioner squib terminals at the pretensioner connector. Compare to the manufacturer specified range (typically ~0.5–5 ohms). An open (OL) indicates an open squib or open wiring.
  6. Continuity to ECU: Check continuity between pretensioner connector terminals and the corresponding SRS ECU pins. Repair any open circuits, damaged wires, or bad crimp terminals.
  7. Wiggle test: With connectors reconnected and battery reconnected per safety procedures, monitor the scan tool while gently moving seat and wiring (only if permitted by manufacturer) to detect intermittent opens. If doing this, follow OEM safety instructions.
  8. Repair: Repair or replace damaged wiring, connectors, or the pretensioner as needed. Replace parts only with OEM specified components.
  9. After repair: Clear codes with scan tool, perform system diagnostic/initialization per manufacturer procedure, and verify that SRS warning lamp extinguishes and no B1614 returns.
  10. If fault persists: Consider SRS ECU connector/internal fault and consult manufacturer-level diagnostic flow or replace ECU as last resort.

Likely causes

  • Loose or disconnected passenger pretensioner connector
  • Harness damage (chafing, broken conductor) between pretensioner and SRS ECU
  • Corroded terminal or poor crimp at connector
  • Open pretensioner squib (low probability vs short but possible)
  • Faulty SRS ECU (less common)

Fault status

⚠️ Status
Passenger seat belt pretensioner active circuit open — SRS control module detects loss of continuity or open in the passenger pretensioner firing/active circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

B1610 B1611 B1612 B1613 B1615
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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