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Home / DTC / B0022 — Left Curtain Deployment Control 2

B0022 — Left Curtain Deployment Control 2

Detailed page for trouble code B0022.

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59brands
11,451generic
22,461specific
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Code

B0022

Generic B — Body

Left Curtain Deployment Control 2

Brand: Generic
Type: B — Body
Views: UK: 35 EN: 59 RU: 47
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in left curtain airbag squib wiring (channel 2)
  • Corroded or loose connector at curtain airbag or SRS control module
  • Faulty left curtain airbag module (squib inflator)
  • Failure or internal fault in SRS (airbag) control module
  • Damaged wiring harness (pinched, rubbed through, water intrusion)
  • Faulty side impact/occupant sensor affecting deployment logic

Symptoms

  • SRS/airbag warning light illuminated on instrument cluster
  • Possible multiple SRS-related codes stored
  • Diagnostic scanner shows left curtain loop fault or abnormal resistance
  • No obvious physical symptom until crash (airbag may not deploy if needed)
  • Reduced airbag system readiness or disablement of left curtain deployment

What to check

  • Verify battery voltage is within specification and battery terminals are clean/tight
  • Use an SRS-capable scan tool to read live data and freeze frame, then record all SRS codes
  • Visually inspect left curtain airbag connectors and wiring from roof rail to SRS module
  • Check for water intrusion, crushed wiring, or previous repair splice in headliner area
  • Measure resistance of left curtain squib circuit (per manufacturer specification) and check for shorts to ground or battery
  • Confirm good ground connections at SRS module and chassis

Signal parameters

  • Squib loop resistance (typical): ~1–5 ohms (manufacturer-specific; consult service data)
  • Open-circuit: OL or very high resistance — indicates open wiring or disconnected connector
  • Short-to-ground or short-to-battery: near 0 ohms or very low — indicates shorted wiring or failed squib
  • SRS module supply voltage: ~12 V battery available at module connector (verify)
  • SRS live data: left curtain deployment loop status should show 'Ready/Normal' with no fault bits set

Diagnostic algorithm

  1. Safety first: disable SRS system per manufacturer procedure (disconnect battery negative terminal and wait required time — typically several minutes) before touching connectors or airbag components.
  2. Connect an SRS-capable scan tool. Confirm B0022 and any related SRS codes. Note freeze-frame info and any accompanying codes (impact sensors, supply voltage, grounding faults).
  3. Visually inspect the left roof/headliner area and along the A-/B-pillar for damaged wires, pinched sections, or water damage. Inspect connectors for corrosion, bent pins, or loose retention clips.
  4. With the SRS disabled and following safety instructions, measure squib loop resistance between the two pins of the left curtain airbag connector. Compare to manufacturer spec and to the opposite side if available.
  5. Check continuity from the squib connector to the SRS control module. Check for shorts to chassis ground and battery positive on the circuit.
  6. Inspect and test the SRS control module power and ground circuits (fuse, fusible link, relay, grounds). Repair any supply/ground issues and retest.
  7. If wiring and connectors test good but resistance is out of spec, replace the left curtain airbag module (squib assembly) and recheck resistance.
  8. If squib and wiring are good but code persists, follow module diagnostics: update/verify SRS module software, re-seat or replace the SRS control module if directed by manufacturer procedures.
  9. After repairs, clear codes with scan tool, perform SRS built-in readiness tests and verify no new codes. Reconnect battery and confirm SRS light extinguishes and system reports ready.
  10. Document repairs. If vehicle has been in a crash, verify all required components were replaced and the system was calibrated per manufacturer.

Likely causes

  • High resistance or open circuit in curtain squib harness
  • Connector corrosion or bent terminals at curtain airbag or central SRS connector
  • Damaged wire near door hinge or roof headliner
  • Defective curtain airbag (internal short/open)
  • SRS control module fault or software/calibration error
  • Poor chassis ground or low supply voltage during system check

Fault status

⚠️ Status
Stored when the SRS control module detects an open, short, high resistance, or communication fault in the left curtain airbag deployment circuit (channel 2), preventing guaranteed deployment control.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B0020 B0021 B0023 B0090 B00A0
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Code

B0022

HUMMER B — Body

Left Front/Driver Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low

Brand: HUMMER
Type: B — Body
Views: UK: 28 EN: 42 RU: 27
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in left curtain airbag squib wiring (channel 2)
  • Corroded or loose connector at curtain airbag or SRS control module
  • Faulty left curtain airbag module (squib inflator)
  • Failure or internal fault in SRS (airbag) control module
  • Damaged wiring harness (pinched, rubbed through, water intrusion)
  • Faulty side impact/occupant sensor affecting deployment logic

Symptoms

  • SRS/airbag warning light illuminated on instrument cluster
  • Possible multiple SRS-related codes stored
  • Diagnostic scanner shows left curtain loop fault or abnormal resistance
  • No obvious physical symptom until crash (airbag may not deploy if needed)
  • Reduced airbag system readiness or disablement of left curtain deployment

What to check

  • Verify battery voltage is within specification and battery terminals are clean/tight
  • Use an SRS-capable scan tool to read live data and freeze frame, then record all SRS codes
  • Visually inspect left curtain airbag connectors and wiring from roof rail to SRS module
  • Check for water intrusion, crushed wiring, or previous repair splice in headliner area
  • Measure resistance of left curtain squib circuit (per manufacturer specification) and check for shorts to ground or battery
  • Confirm good ground connections at SRS module and chassis

Signal parameters

  • Squib loop resistance (typical): ~1–5 ohms (manufacturer-specific; consult service data)
  • Open-circuit: OL or very high resistance — indicates open wiring or disconnected connector
  • Short-to-ground or short-to-battery: near 0 ohms or very low — indicates shorted wiring or failed squib
  • SRS module supply voltage: ~12 V battery available at module connector (verify)
  • SRS live data: left curtain deployment loop status should show 'Ready/Normal' with no fault bits set

Diagnostic algorithm

  1. Safety first: disable SRS system per manufacturer procedure (disconnect battery negative terminal and wait required time — typically several minutes) before touching connectors or airbag components.
  2. Connect an SRS-capable scan tool. Confirm B0022 and any related SRS codes. Note freeze-frame info and any accompanying codes (impact sensors, supply voltage, grounding faults).
  3. Visually inspect the left roof/headliner area and along the A-/B-pillar for damaged wires, pinched sections, or water damage. Inspect connectors for corrosion, bent pins, or loose retention clips.
  4. With the SRS disabled and following safety instructions, measure squib loop resistance between the two pins of the left curtain airbag connector. Compare to manufacturer spec and to the opposite side if available.
  5. Check continuity from the squib connector to the SRS control module. Check for shorts to chassis ground and battery positive on the circuit.
  6. Inspect and test the SRS control module power and ground circuits (fuse, fusible link, relay, grounds). Repair any supply/ground issues and retest.
  7. If wiring and connectors test good but resistance is out of spec, replace the left curtain airbag module (squib assembly) and recheck resistance.
  8. If squib and wiring are good but code persists, follow module diagnostics: update/verify SRS module software, re-seat or replace the SRS control module if directed by manufacturer procedures.
  9. After repairs, clear codes with scan tool, perform SRS built-in readiness tests and verify no new codes. Reconnect battery and confirm SRS light extinguishes and system reports ready.
  10. Document repairs. If vehicle has been in a crash, verify all required components were replaced and the system was calibrated per manufacturer.

Likely causes

  • High resistance or open circuit in curtain squib harness
  • Connector corrosion or bent terminals at curtain airbag or central SRS connector
  • Damaged wire near door hinge or roof headliner
  • Defective curtain airbag (internal short/open)
  • SRS control module fault or software/calibration error
  • Poor chassis ground or low supply voltage during system check

Fault status

⚠️ Status
Stored when the SRS control module detects an open, short, high resistance, or communication fault in the left curtain airbag deployment circuit (channel 2), preventing guaranteed deployment control.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B0020 B0021 B0023 B0090 B00A0
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

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Code

B0022

LAND ROVER B — Body

Control of the left curtain installation 2

Brand: LAND ROVER
Type: B — Body
Views: UK: 14 EN: 32 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in left curtain airbag squib wiring (channel 2)
  • Corroded or loose connector at curtain airbag or SRS control module
  • Faulty left curtain airbag module (squib inflator)
  • Failure or internal fault in SRS (airbag) control module
  • Damaged wiring harness (pinched, rubbed through, water intrusion)
  • Faulty side impact/occupant sensor affecting deployment logic

Symptoms

  • SRS/airbag warning light illuminated on instrument cluster
  • Possible multiple SRS-related codes stored
  • Diagnostic scanner shows left curtain loop fault or abnormal resistance
  • No obvious physical symptom until crash (airbag may not deploy if needed)
  • Reduced airbag system readiness or disablement of left curtain deployment

What to check

  • Verify battery voltage is within specification and battery terminals are clean/tight
  • Use an SRS-capable scan tool to read live data and freeze frame, then record all SRS codes
  • Visually inspect left curtain airbag connectors and wiring from roof rail to SRS module
  • Check for water intrusion, crushed wiring, or previous repair splice in headliner area
  • Measure resistance of left curtain squib circuit (per manufacturer specification) and check for shorts to ground or battery
  • Confirm good ground connections at SRS module and chassis

Signal parameters

  • Squib loop resistance (typical): ~1–5 ohms (manufacturer-specific; consult service data)
  • Open-circuit: OL or very high resistance — indicates open wiring or disconnected connector
  • Short-to-ground or short-to-battery: near 0 ohms or very low — indicates shorted wiring or failed squib
  • SRS module supply voltage: ~12 V battery available at module connector (verify)
  • SRS live data: left curtain deployment loop status should show 'Ready/Normal' with no fault bits set

Diagnostic algorithm

  1. Safety first: disable SRS system per manufacturer procedure (disconnect battery negative terminal and wait required time — typically several minutes) before touching connectors or airbag components.
  2. Connect an SRS-capable scan tool. Confirm B0022 and any related SRS codes. Note freeze-frame info and any accompanying codes (impact sensors, supply voltage, grounding faults).
  3. Visually inspect the left roof/headliner area and along the A-/B-pillar for damaged wires, pinched sections, or water damage. Inspect connectors for corrosion, bent pins, or loose retention clips.
  4. With the SRS disabled and following safety instructions, measure squib loop resistance between the two pins of the left curtain airbag connector. Compare to manufacturer spec and to the opposite side if available.
  5. Check continuity from the squib connector to the SRS control module. Check for shorts to chassis ground and battery positive on the circuit.
  6. Inspect and test the SRS control module power and ground circuits (fuse, fusible link, relay, grounds). Repair any supply/ground issues and retest.
  7. If wiring and connectors test good but resistance is out of spec, replace the left curtain airbag module (squib assembly) and recheck resistance.
  8. If squib and wiring are good but code persists, follow module diagnostics: update/verify SRS module software, re-seat or replace the SRS control module if directed by manufacturer procedures.
  9. After repairs, clear codes with scan tool, perform SRS built-in readiness tests and verify no new codes. Reconnect battery and confirm SRS light extinguishes and system reports ready.
  10. Document repairs. If vehicle has been in a crash, verify all required components were replaced and the system was calibrated per manufacturer.

Likely causes

  • High resistance or open circuit in curtain squib harness
  • Connector corrosion or bent terminals at curtain airbag or central SRS connector
  • Damaged wire near door hinge or roof headliner
  • Defective curtain airbag (internal short/open)
  • SRS control module fault or software/calibration error
  • Poor chassis ground or low supply voltage during system check

Fault status

⚠️ Status
Stored when the SRS control module detects an open, short, high resistance, or communication fault in the left curtain airbag deployment circuit (channel 2), preventing guaranteed deployment control.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B0020 B0021 B0023 B0090 B00A0
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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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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