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Home / DTC / B144D — Front passenger airbag deployment circuit short to ground

B144D — Front passenger airbag deployment circuit short to ground

Detailed page for trouble code B144D.

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11,914generic
22,491specific
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Code

B144D

Generic B — Body

Front passenger airbag deployment circuit short to ground

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

Causes

  • Damaged or chafed wiring contacting chassis ground
  • Damaged passenger airbag module (squib) with internal short
  • Corroded or loose connector pins at airbag or control module
  • Water ingress or contamination in connectors or harness
  • Incorrect aftermarket electrical work or accessory wiring tapping into airbag circuit
  • Faulty airbag control module or internal failure

Symptoms

  • SRS/Airbag warning lamp illuminated or flashing
  • Possible disablement of passenger airbag(s) (passenger airbag off message or lamp)
  • No crash deployment verification for front passenger airbag
  • Other SRS-related faults may be present in scan tool data

What to check

  • Read and record all SRS codes and freeze-frame data with a capable scan tool
  • Confirm battery voltage is stable (low battery can cause spurious faults)
  • Check vehicle-specific SRS power-down time and disconnect battery negative before working on SRS
  • Visually inspect passenger airbag connector, harness routing, and nearby panels for damage or signs of repair
  • Check for moisture, corrosion, or pin deformation at connectors
  • Inspect seat occupancy / weight sensor wiring (if present) for related faults

Signal parameters

  • Typical squib continuity (varies by vehicle): ~0.5–5 Ω across squib terminals (consult vehicle spec)
  • Continuity between each squib wire and chassis ground: should be open (no continuity)
  • Insulation resistance to chassis: typically >1 MΩ (manufacturer dependent)
  • No sustained battery voltage should be present across squib when SRS is disabled; consult vehicle-specific power states before measuring live voltages

Diagnostic algorithm

  1. Use a diagnostic scan tool to confirm B144D and check for additional SRS codes and freeze-frame data
  2. Follow manufacturer SRS safety procedure: disable SRS power (disconnect battery negative) and wait the specified capacitor discharge time before touching connectors (typically several minutes; use OEM procedure)
  3. Perform a careful visual inspection of the passenger airbag connector, wiring harness, and routing for abrasion, pin damage, corrosion, or foreign objects that could contact chassis ground
  4. Disconnect the passenger airbag module connector. With battery still disconnected, measure resistance across the airbag module squib terminals. Compare to vehicle specification; a very low resistance to chassis indicates internal short.
  5. Measure resistance between each squib wire and chassis ground (with module disconnected). Continuity to ground confirms a short in the harness or connector area.
  6. If short to ground is present in harness, isolate by unplugging intermediate connectors or removing panels progressively and re-testing to localize the fault
  7. Inspect and repair damaged wiring: remove chafe points, repair with correct splices, or replace harness sections. Replace corroded connectors or pins as needed.
  8. If wiring and connectors check good but squib resistance is out of spec, replace the passenger airbag module per manufacturer service procedures
  9. If no wiring or airbag faults are found, inspect/replace the airbag control module or its connector as a last step and re-test
  10. After repairs, clear codes and perform SRS system self-test and any required post-repair validations or seat-occupant system calibrations

Likely causes

  • Pinched/chafed wire in dash harness near passenger airbag connector
  • Passenger airbag connector contaminated or corroded, creating a ground path
  • Shorted/failed passenger airbag squib element
  • Repair or aftermarket accessory accidentally grounded to the circuit

Fault status

⚠️ Status
B144D — Front passenger airbag deployment circuit short to ground. Low-resistance path to chassis detected on passenger squib circuit; SRS warning lamp set.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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Code

B144D

LAND ROVER B — Body

All - Control circuit relay

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

Causes

  • Damaged or chafed wiring contacting chassis ground
  • Damaged passenger airbag module (squib) with internal short
  • Corroded or loose connector pins at airbag or control module
  • Water ingress or contamination in connectors or harness
  • Incorrect aftermarket electrical work or accessory wiring tapping into airbag circuit
  • Faulty airbag control module or internal failure

Symptoms

  • SRS/Airbag warning lamp illuminated or flashing
  • Possible disablement of passenger airbag(s) (passenger airbag off message or lamp)
  • No crash deployment verification for front passenger airbag
  • Other SRS-related faults may be present in scan tool data

What to check

  • Read and record all SRS codes and freeze-frame data with a capable scan tool
  • Confirm battery voltage is stable (low battery can cause spurious faults)
  • Check vehicle-specific SRS power-down time and disconnect battery negative before working on SRS
  • Visually inspect passenger airbag connector, harness routing, and nearby panels for damage or signs of repair
  • Check for moisture, corrosion, or pin deformation at connectors
  • Inspect seat occupancy / weight sensor wiring (if present) for related faults

Signal parameters

  • Typical squib continuity (varies by vehicle): ~0.5–5 Ω across squib terminals (consult vehicle spec)
  • Continuity between each squib wire and chassis ground: should be open (no continuity)
  • Insulation resistance to chassis: typically >1 MΩ (manufacturer dependent)
  • No sustained battery voltage should be present across squib when SRS is disabled; consult vehicle-specific power states before measuring live voltages

Diagnostic algorithm

  1. Use a diagnostic scan tool to confirm B144D and check for additional SRS codes and freeze-frame data
  2. Follow manufacturer SRS safety procedure: disable SRS power (disconnect battery negative) and wait the specified capacitor discharge time before touching connectors (typically several minutes; use OEM procedure)
  3. Perform a careful visual inspection of the passenger airbag connector, wiring harness, and routing for abrasion, pin damage, corrosion, or foreign objects that could contact chassis ground
  4. Disconnect the passenger airbag module connector. With battery still disconnected, measure resistance across the airbag module squib terminals. Compare to vehicle specification; a very low resistance to chassis indicates internal short.
  5. Measure resistance between each squib wire and chassis ground (with module disconnected). Continuity to ground confirms a short in the harness or connector area.
  6. If short to ground is present in harness, isolate by unplugging intermediate connectors or removing panels progressively and re-testing to localize the fault
  7. Inspect and repair damaged wiring: remove chafe points, repair with correct splices, or replace harness sections. Replace corroded connectors or pins as needed.
  8. If wiring and connectors check good but squib resistance is out of spec, replace the passenger airbag module per manufacturer service procedures
  9. If no wiring or airbag faults are found, inspect/replace the airbag control module or its connector as a last step and re-test
  10. After repairs, clear codes and perform SRS system self-test and any required post-repair validations or seat-occupant system calibrations

Likely causes

  • Pinched/chafed wire in dash harness near passenger airbag connector
  • Passenger airbag connector contaminated or corroded, creating a ground path
  • Shorted/failed passenger airbag squib element
  • Repair or aftermarket accessory accidentally grounded to the circuit

Fault status

⚠️ Status
B144D — Front passenger airbag deployment circuit short to ground. Low-resistance path to chassis detected on passenger squib circuit; SRS warning lamp set.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B144C B144E B144F B1450 B1400
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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