Code
B1998
LAND ROVER
B — Body
Right airbag deployment control - open circuit
Views:
UK: 4
EN: 7
RU: 7
AI status
Completed
Completed
100%
Causes
- Disconnected or loose airbag (squib) connector
- Broken or damaged wiring in the squib harness (open circuit)
- Corroded or bent connector pins
- Damage to wiring at hinge points, seat tracks or under-seat areas
- Faulty airbag module / squib (open internal connection)
- SRS control module or connector fault
Symptoms
- SRS / airbag warning lamp illuminated on dash
- Possible loss of right-side airbag deployment protection
- Stored B1998 (and possibly related SRS codes) in SRS control module
- Vehicle may fail safety inspection where SRS lamp must be off
What to check
- Read and record all SRS codes with a capable scan tool; note freeze frame and history
- Perform visual inspection of right airbag connector (seat/door/side module) and wiring harness
- Inspect harness routing near seat mounts, seat belt pretensioner, door hinges and floor for damage
- Check for signs of corrosion, bent pins, or water ingress at connectors
- Measure resistance/continuity of the squib circuit at the airbag connector and at the SRS ECU
- Confirm battery voltage is within specification and check for related power/ground faults
Signal parameters
- Typical airbag squib resistance: approx. 2–5 ohms (varies by model). Open circuit will show very high/OL resistance.
- Shorted circuit shows near 0 ohms; open circuit shows infinite/OL.
- SRS diagnostic thresholds and exact resistance values vary by model — consult Land Rover workshop data for exact specs.
- No voltage should be present at squib connector during inspection; follow manufacturer's safety procedures before measuring.
Diagnostic algorithm
- SAFETY FIRST: Disable the SRS system per Land Rover procedure (disconnect battery and wait the required time or follow manufacturer specified inerting procedure).
- Use a diagnostic scan tool to read all SRS codes and note any related codes. Clear codes only after repair to confirm correction.
- Visually inspect the right airbag connector and harness; look for disconnected plugs, damaged insulation, chafing, or corrosion especially at seat rails and door hinge areas.
- With SRS made safe per procedures, disconnect the right airbag connector and measure squib resistance at the connector pins. Compare to manufacturer spec (typical ~2–5 Ω). An open reading indicates a wiring or squib open.
- If open at the airbag connector, test continuity from the airbag connector back to the SRS control module connector pins. Repair any open circuits found (splice repair or harness replacement as per spec).
- If continuity to the SRS module is good, but the squib is open, replace the right airbag module/squib assembly per OEM instructions.
- If open at or near a connector, inspect/repair/replace the connector or pigtail; ensure correct pin fitment and no corrosion. Use OEM replacement parts and specified crimps or soldering methods.
- If wiring and squib check OK, investigate the SRS control module input and connector for faults; replace or reprogram only if confirmed faulty per diagnostic flow.
- After repair, reconnect, re-enable SRS per procedures, clear codes, and perform a system check with scan tool. Verify SRS warning lamp extinguishes and no stored B1998 returns.
- Advise that any module or airbag replacement may require registration/configuration or additional checks per Land Rover service instructions.
Likely causes
- Right airbag connector unplugged or poorly seated (common after seat removal)
- Open conductor in harness between right airbag and SRS ECU (pinched, chafed, or broken)
- Corroded/crushed pin in module or airbag connector creating open circuit
- Failed right airbag squib (internal open)
- Fault in SRS control module input circuit (less common)
Fault status
Status
Right airbag deployment control circuit open (B1998). SRS lamp illuminated; right-side airbag circuit continuity fault detected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
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Code
B1998
Other
B — Body
Passenger Sid, Side mount Airbag Circuit Open
Views:
UK: 12
EN: 27
RU: 24
AI status
Completed
Completed
100%
Causes
- Disconnected or loose airbag (squib) connector
- Broken or damaged wiring in the squib harness (open circuit)
- Corroded or bent connector pins
- Damage to wiring at hinge points, seat tracks or under-seat areas
- Faulty airbag module / squib (open internal connection)
- SRS control module or connector fault
Symptoms
- SRS / airbag warning lamp illuminated on dash
- Possible loss of right-side airbag deployment protection
- Stored B1998 (and possibly related SRS codes) in SRS control module
- Vehicle may fail safety inspection where SRS lamp must be off
What to check
- Read and record all SRS codes with a capable scan tool; note freeze frame and history
- Perform visual inspection of right airbag connector (seat/door/side module) and wiring harness
- Inspect harness routing near seat mounts, seat belt pretensioner, door hinges and floor for damage
- Check for signs of corrosion, bent pins, or water ingress at connectors
- Measure resistance/continuity of the squib circuit at the airbag connector and at the SRS ECU
- Confirm battery voltage is within specification and check for related power/ground faults
Signal parameters
- Typical airbag squib resistance: approx. 2–5 ohms (varies by model). Open circuit will show very high/OL resistance.
- Shorted circuit shows near 0 ohms; open circuit shows infinite/OL.
- SRS diagnostic thresholds and exact resistance values vary by model — consult Land Rover workshop data for exact specs.
- No voltage should be present at squib connector during inspection; follow manufacturer's safety procedures before measuring.
Diagnostic algorithm
- SAFETY FIRST: Disable the SRS system per Land Rover procedure (disconnect battery and wait the required time or follow manufacturer specified inerting procedure).
- Use a diagnostic scan tool to read all SRS codes and note any related codes. Clear codes only after repair to confirm correction.
- Visually inspect the right airbag connector and harness; look for disconnected plugs, damaged insulation, chafing, or corrosion especially at seat rails and door hinge areas.
- With SRS made safe per procedures, disconnect the right airbag connector and measure squib resistance at the connector pins. Compare to manufacturer spec (typical ~2–5 Ω). An open reading indicates a wiring or squib open.
- If open at the airbag connector, test continuity from the airbag connector back to the SRS control module connector pins. Repair any open circuits found (splice repair or harness replacement as per spec).
- If continuity to the SRS module is good, but the squib is open, replace the right airbag module/squib assembly per OEM instructions.
- If open at or near a connector, inspect/repair/replace the connector or pigtail; ensure correct pin fitment and no corrosion. Use OEM replacement parts and specified crimps or soldering methods.
- If wiring and squib check OK, investigate the SRS control module input and connector for faults; replace or reprogram only if confirmed faulty per diagnostic flow.
- After repair, reconnect, re-enable SRS per procedures, clear codes, and perform a system check with scan tool. Verify SRS warning lamp extinguishes and no stored B1998 returns.
- Advise that any module or airbag replacement may require registration/configuration or additional checks per Land Rover service instructions.
Likely causes
- Right airbag connector unplugged or poorly seated (common after seat removal)
- Open conductor in harness between right airbag and SRS ECU (pinched, chafed, or broken)
- Corroded/crushed pin in module or airbag connector creating open circuit
- Failed right airbag squib (internal open)
- Fault in SRS control module input circuit (less common)
Fault status
Status
Right airbag deployment control circuit open (B1998). SRS lamp illuminated; right-side airbag circuit continuity fault detected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Workshop Manuals
Available brands with manuals
1
LAND ROVER 2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email