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Home / DTC / B1699 — Collective deployment

B1699 — Collective deployment

Detailed page for trouble code B1699.

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Code

B1699

MITSUBISHI B — Body

Collective deployment

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

Causes

  • Previous airbag/pretensioner deployment that was not properly repaired or cleared
  • Short or open in airbag squib or pretensioner circuits
  • Damaged wiring harness or connectors in SRS circuits (chafing, corrosion, disconnected)
  • Faulty SRS (airbag) control module
  • Improper repair after a collision (incorrectly connected harness, missing components)
  • Loss of SRS power or ground supply (blown fuse, poor ground)

Symptoms

  • SRS / airbag warning lamp illuminated
  • Possible stored crash data in SRS control unit
  • Airbag and pretensioner systems may be disabled
  • DTC stored and may prevent vehicle from passing inspection in some jurisdictions

What to check

  • Scan SRS module with a compatible diagnostic tool to read freeze frame/impact data and stored codes
  • Visually inspect all airbag and pretensioner modules (driver, passenger, side, curtain) for evidence of deployment or damage
  • Inspect wiring harnesses, connectors, and grounding points related to the SRS system for damage, corrosion, or disconnection
  • Check SRS-related fuses and power/ground at the SRS ECU
  • Measure continuity and resistance of squib circuits only following OEM safety procedures (battery disconnect and required wait time)

Signal parameters

  • Battery supply to SRS ECU: ~12 V (with ignition ON)
  • Squib (airbag/pretensioner) circuit typical resistance: low ohms (commonly ~2–5 Ω) when intact — manufacturer-specific values apply
  • Open-circuit threshold: very high resistance / infinite (open)
  • Short-to-ground/short-to-VB threshold: near 0 Ω indicates short condition
  • Insulation/leakage: resistance to chassis ground should be very high (typically >1 MΩ) when intact

Diagnostic algorithm

  1. Read and record all SRS-related DTCs and freeze frame/impact data with a compatible Mitsubishi scan tool. Do not clear codes yet — preserving data is important.
  2. Check service history and perform a visual inspection for evidence of prior deployment (deployed airbags/pyrotechnics, replaced components, accident repairs).
  3. Inspect fuses and SRS ECU power and ground. Verify battery voltage at SRS ECU connectors with ignition ON.
  4. With the battery disconnected and after waiting the manufacturer-specified time for capacitor discharge (follow Mitsubishi procedure), visually inspect and test continuity of wiring and connectors between the SRS ECU and each squib/pretensioner/airbag module.
  5. Measure squib resistances per OEM specifications. Compare readings with factory values. Replace any squib (airbag or pretensioner) or harness with out-of-spec resistance.
  6. Repair any damaged wiring, replace corroded connectors, or replace deployed airbag/pretensioner modules. Ensure correct installation and connector seating.
  7. After repairs and reconnection, clear codes and perform SRS self-test with a diagnostic tool. Confirm no B1699 or related SRS codes return and that the SRS warning light extinguishes.
  8. If the SRS ECU shows stored deployment event data that cannot be cleared or the ECU reports internal fault, replace or reprogram the SRS control unit per factory procedure.

Likely causes

  • Vehicle has sustained a crash and airbags/pretensioners deployed but were not replaced or the ECU was not reset
  • Shorted or open squib (airbag/pretensioner) wiring due to harness damage at impact points
  • Corroded or disconnected connector at an airbag module or SRS ECU
  • SRS control module recorded deployment event or internal fault

Fault status

⚠️ Status
SRS collective deployment detected or deployment-circuit fault recorded. Inspect for prior deployment, wiring faults, and SRS ECU errors.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

B1690 B1691 B1698 B1700 B1000
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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Code

B1699

Other B — Body

Passenger's Seat Occupied Switch Circuit Short to Ground

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

Causes

  • Previous airbag/pretensioner deployment that was not properly repaired or cleared
  • Short or open in airbag squib or pretensioner circuits
  • Damaged wiring harness or connectors in SRS circuits (chafing, corrosion, disconnected)
  • Faulty SRS (airbag) control module
  • Improper repair after a collision (incorrectly connected harness, missing components)
  • Loss of SRS power or ground supply (blown fuse, poor ground)

Symptoms

  • SRS / airbag warning lamp illuminated
  • Possible stored crash data in SRS control unit
  • Airbag and pretensioner systems may be disabled
  • DTC stored and may prevent vehicle from passing inspection in some jurisdictions

What to check

  • Scan SRS module with a compatible diagnostic tool to read freeze frame/impact data and stored codes
  • Visually inspect all airbag and pretensioner modules (driver, passenger, side, curtain) for evidence of deployment or damage
  • Inspect wiring harnesses, connectors, and grounding points related to the SRS system for damage, corrosion, or disconnection
  • Check SRS-related fuses and power/ground at the SRS ECU
  • Measure continuity and resistance of squib circuits only following OEM safety procedures (battery disconnect and required wait time)

Signal parameters

  • Battery supply to SRS ECU: ~12 V (with ignition ON)
  • Squib (airbag/pretensioner) circuit typical resistance: low ohms (commonly ~2–5 Ω) when intact — manufacturer-specific values apply
  • Open-circuit threshold: very high resistance / infinite (open)
  • Short-to-ground/short-to-VB threshold: near 0 Ω indicates short condition
  • Insulation/leakage: resistance to chassis ground should be very high (typically >1 MΩ) when intact

Diagnostic algorithm

  1. Read and record all SRS-related DTCs and freeze frame/impact data with a compatible Mitsubishi scan tool. Do not clear codes yet — preserving data is important.
  2. Check service history and perform a visual inspection for evidence of prior deployment (deployed airbags/pyrotechnics, replaced components, accident repairs).
  3. Inspect fuses and SRS ECU power and ground. Verify battery voltage at SRS ECU connectors with ignition ON.
  4. With the battery disconnected and after waiting the manufacturer-specified time for capacitor discharge (follow Mitsubishi procedure), visually inspect and test continuity of wiring and connectors between the SRS ECU and each squib/pretensioner/airbag module.
  5. Measure squib resistances per OEM specifications. Compare readings with factory values. Replace any squib (airbag or pretensioner) or harness with out-of-spec resistance.
  6. Repair any damaged wiring, replace corroded connectors, or replace deployed airbag/pretensioner modules. Ensure correct installation and connector seating.
  7. After repairs and reconnection, clear codes and perform SRS self-test with a diagnostic tool. Confirm no B1699 or related SRS codes return and that the SRS warning light extinguishes.
  8. If the SRS ECU shows stored deployment event data that cannot be cleared or the ECU reports internal fault, replace or reprogram the SRS control unit per factory procedure.

Likely causes

  • Vehicle has sustained a crash and airbags/pretensioners deployed but were not replaced or the ECU was not reset
  • Shorted or open squib (airbag/pretensioner) wiring due to harness damage at impact points
  • Corroded or disconnected connector at an airbag module or SRS ECU
  • SRS control module recorded deployment event or internal fault

Fault status

⚠️ Status
SRS collective deployment detected or deployment-circuit fault recorded. Inspect for prior deployment, wiring faults, and SRS ECU errors.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.5-3.5 hours

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B1690 B1691 B1698 B1700 B1000
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