Code
B1230
ALFA ROMEO
B — Body
Driver seat belt pretensioner detonator high/low resistance
Views:
UK: 4
EN: 6
RU: 6
AI status
Completed
Completed
100%
Causes
- Open circuit in pretensioner wiring or connector (broken wire, poor terminal contact)
- Short circuit to ground or battery (B+) in pretensioner wiring
- Corroded or contaminated pretensioner connector terminals
- Internal failure of the pretensioner detonator (squib) due to previous deployment or manufacturing defect
- Faulty SRS (airbag) control module or software/calibration error
- Aftermarket seat or wiring modifications damaging the harness
Symptoms
- SRS / airbag warning lamp illuminated on instrument cluster
- Possible safety belt warning lamp or message related to pretensioner fault
- Airbag/pretensioner system disabled (SRS fault present) — warning must be addressed before safe system operation can be assured
- Stored fault code B1230 (and possibly related SRS codes) in the airbag control module
What to check
- Read and record all SRS codes and freeze-frame data with a compatible diagnostic scanner
- Confirm manufacturer battery disconnect and SRS disable procedure before doing physical work (wait specified time)
- Visually inspect the driver seat belt pretensioner connector and surrounding wiring for damage, corrosion, overheating or burn marks
- Check for previous deployment evidence (cut/burned wiring, deployed airbag or pretensioner)
- Measure squib circuit resistance at the pretensioner connector with connector disconnected (see signal_params)
- Perform continuity checks to SRS module connector and check for shorts to ground and to battery (B+)
Signal parameters
- Expected: low continuity (low resistance) between pretensioner squib terminals — consult the vehicle service manual for exact specification (typical passenger-vehicle squib resistance is low ohms)
- Open circuit: infinite resistance (no continuity) — indicates broken wiring or failed detonator
- Short to ground or B+: near 0 Ω or continuity to chassis/battery positive — indicates shorted wiring
- Note: exact resistance/voltages vary by model/year. Always use the vehicle manufacturer service manual for the correct target values and test method.
Diagnostic algorithm
- Connect an OEM-capable SRS scanner, record all airbag and related codes, note any other SRS faults.
- Follow Alfa Romeo procedure to disable SRS (disconnect battery and wait the manufacturer-specified time to allow capacitors to discharge).
- Visually inspect pretensioner connector and seat wiring for corrosion, heat damage, pin damage or loose terminals. Repair or replace damaged connectors/harness sections.
- With connector disconnected and battery still isolated, measure resistance of the pretensioner squib at the connector. Compare to spec. If resistance is open or out of expected range, suspect wiring or squib failure.
- Check for short to ground or short to battery by measuring continuity between squib pins and chassis ground/B+. Repair shorted wiring as required.
- If wiring and connectors check good but resistance still abnormal, replace the driver seat belt pretensioner assembly (squib).
- After repairs, reconnect battery, clear codes with the SRS scanner, then perform SRS system self-test and verify no faults return. If code persists, inspect/control module and bus communication and consider SRS control module replacement only after ruling out wiring and squib failures.
- Log repairs and, if pretensioner deployment is suspected, follow legal/safety requirements for disposal and replacement of pyrotechnic components.
Likely causes
- Corroded/loose pretensioner connector at seat
- Wiring chafe or broken conductor in seat harness (seat belt/slide area)
- Failed squib (detonator) inside the pretensioner after a deployment or due to age
- Short to ground from pin abrasion during seat movement
- Poor crimp or connector pin backout during service/seat removal
Fault status
Status
SRS control unit detected driver seat belt pretensioner detonator circuit resistance outside normal range (high or low). This indicates a possible open, short, connector/wiring fault, or a failed pretensioner squib. System must be inspected and repaired to restore proper SRS function.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1230
FIAT
B — Body
Driver seat belt pretensioner detonator high/low resistance
Views:
UK: 3
EN: 5
RU: 6
AI status
Completed
Completed
100%
Causes
- Open circuit in pretensioner wiring or connector (broken wire, poor terminal contact)
- Short circuit to ground or battery (B+) in pretensioner wiring
- Corroded or contaminated pretensioner connector terminals
- Internal failure of the pretensioner detonator (squib) due to previous deployment or manufacturing defect
- Faulty SRS (airbag) control module or software/calibration error
- Aftermarket seat or wiring modifications damaging the harness
Symptoms
- SRS / airbag warning lamp illuminated on instrument cluster
- Possible safety belt warning lamp or message related to pretensioner fault
- Airbag/pretensioner system disabled (SRS fault present) — warning must be addressed before safe system operation can be assured
- Stored fault code B1230 (and possibly related SRS codes) in the airbag control module
What to check
- Read and record all SRS codes and freeze-frame data with a compatible diagnostic scanner
- Confirm manufacturer battery disconnect and SRS disable procedure before doing physical work (wait specified time)
- Visually inspect the driver seat belt pretensioner connector and surrounding wiring for damage, corrosion, overheating or burn marks
- Check for previous deployment evidence (cut/burned wiring, deployed airbag or pretensioner)
- Measure squib circuit resistance at the pretensioner connector with connector disconnected (see signal_params)
- Perform continuity checks to SRS module connector and check for shorts to ground and to battery (B+)
Signal parameters
- Expected: low continuity (low resistance) between pretensioner squib terminals — consult the vehicle service manual for exact specification (typical passenger-vehicle squib resistance is low ohms)
- Open circuit: infinite resistance (no continuity) — indicates broken wiring or failed detonator
- Short to ground or B+: near 0 Ω or continuity to chassis/battery positive — indicates shorted wiring
- Note: exact resistance/voltages vary by model/year. Always use the vehicle manufacturer service manual for the correct target values and test method.
Diagnostic algorithm
- Connect an OEM-capable SRS scanner, record all airbag and related codes, note any other SRS faults.
- Follow Alfa Romeo procedure to disable SRS (disconnect battery and wait the manufacturer-specified time to allow capacitors to discharge).
- Visually inspect pretensioner connector and seat wiring for corrosion, heat damage, pin damage or loose terminals. Repair or replace damaged connectors/harness sections.
- With connector disconnected and battery still isolated, measure resistance of the pretensioner squib at the connector. Compare to spec. If resistance is open or out of expected range, suspect wiring or squib failure.
- Check for short to ground or short to battery by measuring continuity between squib pins and chassis ground/B+. Repair shorted wiring as required.
- If wiring and connectors check good but resistance still abnormal, replace the driver seat belt pretensioner assembly (squib).
- After repairs, reconnect battery, clear codes with the SRS scanner, then perform SRS system self-test and verify no faults return. If code persists, inspect/control module and bus communication and consider SRS control module replacement only after ruling out wiring and squib failures.
- Log repairs and, if pretensioner deployment is suspected, follow legal/safety requirements for disposal and replacement of pyrotechnic components.
Likely causes
- Corroded/loose pretensioner connector at seat
- Wiring chafe or broken conductor in seat harness (seat belt/slide area)
- Failed squib (detonator) inside the pretensioner after a deployment or due to age
- Short to ground from pin abrasion during seat movement
- Poor crimp or connector pin backout during service/seat removal
Fault status
Status
SRS control unit detected driver seat belt pretensioner detonator circuit resistance outside normal range (high or low). This indicates a possible open, short, connector/wiring fault, or a failed pretensioner squib. System must be inspected and repaired to restore proper SRS function.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1230
LAND ROVER
B — Body
Left seat backrest
Views:
UK: 6
EN: 10
RU: 16
AI status
Completed
Completed
100%
Causes
- Open circuit in pretensioner wiring or connector (broken wire, poor terminal contact)
- Short circuit to ground or battery (B+) in pretensioner wiring
- Corroded or contaminated pretensioner connector terminals
- Internal failure of the pretensioner detonator (squib) due to previous deployment or manufacturing defect
- Faulty SRS (airbag) control module or software/calibration error
- Aftermarket seat or wiring modifications damaging the harness
Symptoms
- SRS / airbag warning lamp illuminated on instrument cluster
- Possible safety belt warning lamp or message related to pretensioner fault
- Airbag/pretensioner system disabled (SRS fault present) — warning must be addressed before safe system operation can be assured
- Stored fault code B1230 (and possibly related SRS codes) in the airbag control module
What to check
- Read and record all SRS codes and freeze-frame data with a compatible diagnostic scanner
- Confirm manufacturer battery disconnect and SRS disable procedure before doing physical work (wait specified time)
- Visually inspect the driver seat belt pretensioner connector and surrounding wiring for damage, corrosion, overheating or burn marks
- Check for previous deployment evidence (cut/burned wiring, deployed airbag or pretensioner)
- Measure squib circuit resistance at the pretensioner connector with connector disconnected (see signal_params)
- Perform continuity checks to SRS module connector and check for shorts to ground and to battery (B+)
Signal parameters
- Expected: low continuity (low resistance) between pretensioner squib terminals — consult the vehicle service manual for exact specification (typical passenger-vehicle squib resistance is low ohms)
- Open circuit: infinite resistance (no continuity) — indicates broken wiring or failed detonator
- Short to ground or B+: near 0 Ω or continuity to chassis/battery positive — indicates shorted wiring
- Note: exact resistance/voltages vary by model/year. Always use the vehicle manufacturer service manual for the correct target values and test method.
Diagnostic algorithm
- Connect an OEM-capable SRS scanner, record all airbag and related codes, note any other SRS faults.
- Follow Alfa Romeo procedure to disable SRS (disconnect battery and wait the manufacturer-specified time to allow capacitors to discharge).
- Visually inspect pretensioner connector and seat wiring for corrosion, heat damage, pin damage or loose terminals. Repair or replace damaged connectors/harness sections.
- With connector disconnected and battery still isolated, measure resistance of the pretensioner squib at the connector. Compare to spec. If resistance is open or out of expected range, suspect wiring or squib failure.
- Check for short to ground or short to battery by measuring continuity between squib pins and chassis ground/B+. Repair shorted wiring as required.
- If wiring and connectors check good but resistance still abnormal, replace the driver seat belt pretensioner assembly (squib).
- After repairs, reconnect battery, clear codes with the SRS scanner, then perform SRS system self-test and verify no faults return. If code persists, inspect/control module and bus communication and consider SRS control module replacement only after ruling out wiring and squib failures.
- Log repairs and, if pretensioner deployment is suspected, follow legal/safety requirements for disposal and replacement of pyrotechnic components.
Likely causes
- Corroded/loose pretensioner connector at seat
- Wiring chafe or broken conductor in seat harness (seat belt/slide area)
- Failed squib (detonator) inside the pretensioner after a deployment or due to age
- Short to ground from pin abrasion during seat movement
- Poor crimp or connector pin backout during service/seat removal
Fault status
Status
SRS control unit detected driver seat belt pretensioner detonator circuit resistance outside normal range (high or low). This indicates a possible open, short, connector/wiring fault, or a failed pretensioner squib. System must be inspected and repaired to restore proper SRS function.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1230
MERCEDES-BENZ
B — Body
Evaporator temperature sensor (B10/6)
Views:
UK: 16
EN: 30
RU: 26
AI status
Completed
Completed
100%
Causes
- Open circuit in pretensioner wiring or connector (broken wire, poor terminal contact)
- Short circuit to ground or battery (B+) in pretensioner wiring
- Corroded or contaminated pretensioner connector terminals
- Internal failure of the pretensioner detonator (squib) due to previous deployment or manufacturing defect
- Faulty SRS (airbag) control module or software/calibration error
- Aftermarket seat or wiring modifications damaging the harness
Symptoms
- SRS / airbag warning lamp illuminated on instrument cluster
- Possible safety belt warning lamp or message related to pretensioner fault
- Airbag/pretensioner system disabled (SRS fault present) — warning must be addressed before safe system operation can be assured
- Stored fault code B1230 (and possibly related SRS codes) in the airbag control module
What to check
- Read and record all SRS codes and freeze-frame data with a compatible diagnostic scanner
- Confirm manufacturer battery disconnect and SRS disable procedure before doing physical work (wait specified time)
- Visually inspect the driver seat belt pretensioner connector and surrounding wiring for damage, corrosion, overheating or burn marks
- Check for previous deployment evidence (cut/burned wiring, deployed airbag or pretensioner)
- Measure squib circuit resistance at the pretensioner connector with connector disconnected (see signal_params)
- Perform continuity checks to SRS module connector and check for shorts to ground and to battery (B+)
Signal parameters
- Expected: low continuity (low resistance) between pretensioner squib terminals — consult the vehicle service manual for exact specification (typical passenger-vehicle squib resistance is low ohms)
- Open circuit: infinite resistance (no continuity) — indicates broken wiring or failed detonator
- Short to ground or B+: near 0 Ω or continuity to chassis/battery positive — indicates shorted wiring
- Note: exact resistance/voltages vary by model/year. Always use the vehicle manufacturer service manual for the correct target values and test method.
Diagnostic algorithm
- Connect an OEM-capable SRS scanner, record all airbag and related codes, note any other SRS faults.
- Follow Alfa Romeo procedure to disable SRS (disconnect battery and wait the manufacturer-specified time to allow capacitors to discharge).
- Visually inspect pretensioner connector and seat wiring for corrosion, heat damage, pin damage or loose terminals. Repair or replace damaged connectors/harness sections.
- With connector disconnected and battery still isolated, measure resistance of the pretensioner squib at the connector. Compare to spec. If resistance is open or out of expected range, suspect wiring or squib failure.
- Check for short to ground or short to battery by measuring continuity between squib pins and chassis ground/B+. Repair shorted wiring as required.
- If wiring and connectors check good but resistance still abnormal, replace the driver seat belt pretensioner assembly (squib).
- After repairs, reconnect battery, clear codes with the SRS scanner, then perform SRS system self-test and verify no faults return. If code persists, inspect/control module and bus communication and consider SRS control module replacement only after ruling out wiring and squib failures.
- Log repairs and, if pretensioner deployment is suspected, follow legal/safety requirements for disposal and replacement of pyrotechnic components.
Likely causes
- Corroded/loose pretensioner connector at seat
- Wiring chafe or broken conductor in seat harness (seat belt/slide area)
- Failed squib (detonator) inside the pretensioner after a deployment or due to age
- Short to ground from pin abrasion during seat movement
- Poor crimp or connector pin backout during service/seat removal
Fault status
Status
SRS control unit detected driver seat belt pretensioner detonator circuit resistance outside normal range (high or low). This indicates a possible open, short, connector/wiring fault, or a failed pretensioner squib. System must be inspected and repaired to restore proper SRS function.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
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Was this AI description helpful?
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