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Home / DTC / B1234 — Front Passenger Airbag Squib Circuit Open

B1234 — Front Passenger Airbag Squib Circuit Open

Detailed page for trouble code B1234.

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23,694specific
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Code

B1234

HYUNDAI B — Body

Front Passenger Airbag Squib Circuit Open

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

Causes

  • Disconnected or poorly connected passenger airbag connector
  • Broken or chafed wiring in the squib harness (open circuit)
  • Corroded or bent terminal pins at connector
  • Removed or replaced seat/airbag component without proper reconnection
  • Failed passenger airbag module (open internal squib)
  • SRS control module or harness connector fault

Symptoms

  • SRS/Airbag warning light illuminated on instrument panel
  • Passenger airbag disabled or warning indicating passenger airbag fault
  • DTC B1234 stored in SRS control module
  • Possible loss of protection for front passenger in a crash

What to check

  • Read and record all SRS codes and freeze frame data with a capable scan tool
  • Check for additional SRS or related body codes (may help locate fault)
  • Visual inspection of passenger airbag connector (dash/seat) for disconnection, corrosion, pin damage
  • Inspect harness routing for chafing, breaks, or damage (under seat, seat rails, floor, dash)
  • Verify connector pin contact quality and proper mating
  • Check for evidence of prior deployment or repair in the passenger airbag area

Signal parameters

  • Expected squib continuity: low resistance (typically around 1–5 Ω depending on manufacturer and squib design)
  • Open-circuit condition: infinite resistance or OL on meter
  • SRS module monitors continuity; no normal continuous 12 V supply to squib until deployment signal
  • Resistance should be measured with battery disconnected and SRS system made safe per service manual

Diagnostic algorithm

  1. Verify the code with a diagnostic scan tool and note freeze frame / related codes.
  2. Follow all manufacturer SRS safety procedures before any inspection or measurement (disconnect battery negative and wait the specified time — consult Hyundai service manual).
  3. Visually inspect the passenger airbag connector(s) and harness for obvious damage, disconnection, corrosion, or pushed-out pins.
  4. With the battery disconnected and SRS system made safe, measure resistance across the passenger squib terminals at the airbag connector. Compare to expected low-resistance value; an open reading indicates a break or open squib.
  5. If open at the airbag connector, disconnect and inspect intermediate connectors and harness toward the SRS control module — perform continuity checks segment-by-segment to locate open.
  6. If continuity is good at the airbag connector but open at the SRS module harness, inspect/repair wiring between them and the module connector.
  7. Repair found faults (re-pin, replace damaged wiring, repair connector, or replace airbag module if internal squib is open). Use proper SRS repair parts and connectors.
  8. After repairs, reconnect battery (per safety procedures) and clear codes with scan tool. Re-scan to confirm B1234 does not return and that the SRS system shows normal status.
  9. If code persists after wiring and connector repairs, suspect faulty SRS control module or incorrect repair; consult manufacturer service information and consider module testing/replacement at qualified facility.

Likely causes

  • Loose or disconnected connector at the passenger airbag
  • Wiring damage in the harness (seat rails, under-dash, or door hinge area if routed)
  • Open squib inside the passenger airbag (after deployment or internal failure)
  • Corroded/crushed terminals at mating connectors

Fault status

⚠️ Status
Front passenger airbag squib circuit open — SRS fault stored (passenger airbag disabled).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1233 B1235 B1240 B1250 B1100
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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Code

B1234

LAND ROVER B — Body

Mirror switch code Invalid code

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

Causes

  • Disconnected or poorly connected passenger airbag connector
  • Broken or chafed wiring in the squib harness (open circuit)
  • Corroded or bent terminal pins at connector
  • Removed or replaced seat/airbag component without proper reconnection
  • Failed passenger airbag module (open internal squib)
  • SRS control module or harness connector fault

Symptoms

  • SRS/Airbag warning light illuminated on instrument panel
  • Passenger airbag disabled or warning indicating passenger airbag fault
  • DTC B1234 stored in SRS control module
  • Possible loss of protection for front passenger in a crash

What to check

  • Read and record all SRS codes and freeze frame data with a capable scan tool
  • Check for additional SRS or related body codes (may help locate fault)
  • Visual inspection of passenger airbag connector (dash/seat) for disconnection, corrosion, pin damage
  • Inspect harness routing for chafing, breaks, or damage (under seat, seat rails, floor, dash)
  • Verify connector pin contact quality and proper mating
  • Check for evidence of prior deployment or repair in the passenger airbag area

Signal parameters

  • Expected squib continuity: low resistance (typically around 1–5 Ω depending on manufacturer and squib design)
  • Open-circuit condition: infinite resistance or OL on meter
  • SRS module monitors continuity; no normal continuous 12 V supply to squib until deployment signal
  • Resistance should be measured with battery disconnected and SRS system made safe per service manual

Diagnostic algorithm

  1. Verify the code with a diagnostic scan tool and note freeze frame / related codes.
  2. Follow all manufacturer SRS safety procedures before any inspection or measurement (disconnect battery negative and wait the specified time — consult Hyundai service manual).
  3. Visually inspect the passenger airbag connector(s) and harness for obvious damage, disconnection, corrosion, or pushed-out pins.
  4. With the battery disconnected and SRS system made safe, measure resistance across the passenger squib terminals at the airbag connector. Compare to expected low-resistance value; an open reading indicates a break or open squib.
  5. If open at the airbag connector, disconnect and inspect intermediate connectors and harness toward the SRS control module — perform continuity checks segment-by-segment to locate open.
  6. If continuity is good at the airbag connector but open at the SRS module harness, inspect/repair wiring between them and the module connector.
  7. Repair found faults (re-pin, replace damaged wiring, repair connector, or replace airbag module if internal squib is open). Use proper SRS repair parts and connectors.
  8. After repairs, reconnect battery (per safety procedures) and clear codes with scan tool. Re-scan to confirm B1234 does not return and that the SRS system shows normal status.
  9. If code persists after wiring and connector repairs, suspect faulty SRS control module or incorrect repair; consult manufacturer service information and consider module testing/replacement at qualified facility.

Likely causes

  • Loose or disconnected connector at the passenger airbag
  • Wiring damage in the harness (seat rails, under-dash, or door hinge area if routed)
  • Open squib inside the passenger airbag (after deployment or internal failure)
  • Corroded/crushed terminals at mating connectors

Fault status

⚠️ Status
Front passenger airbag squib circuit open — SRS fault stored (passenger airbag disabled).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1233 B1235 B1240 B1250 B1100
413

Browse 413 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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Code

B1234

MERCEDES-BENZ B — Body

Sun sensor (B32)

Brand: MERCEDES-BENZ
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Disconnected or poorly connected passenger airbag connector
  • Broken or chafed wiring in the squib harness (open circuit)
  • Corroded or bent terminal pins at connector
  • Removed or replaced seat/airbag component without proper reconnection
  • Failed passenger airbag module (open internal squib)
  • SRS control module or harness connector fault

Symptoms

  • SRS/Airbag warning light illuminated on instrument panel
  • Passenger airbag disabled or warning indicating passenger airbag fault
  • DTC B1234 stored in SRS control module
  • Possible loss of protection for front passenger in a crash

What to check

  • Read and record all SRS codes and freeze frame data with a capable scan tool
  • Check for additional SRS or related body codes (may help locate fault)
  • Visual inspection of passenger airbag connector (dash/seat) for disconnection, corrosion, pin damage
  • Inspect harness routing for chafing, breaks, or damage (under seat, seat rails, floor, dash)
  • Verify connector pin contact quality and proper mating
  • Check for evidence of prior deployment or repair in the passenger airbag area

Signal parameters

  • Expected squib continuity: low resistance (typically around 1–5 Ω depending on manufacturer and squib design)
  • Open-circuit condition: infinite resistance or OL on meter
  • SRS module monitors continuity; no normal continuous 12 V supply to squib until deployment signal
  • Resistance should be measured with battery disconnected and SRS system made safe per service manual

Diagnostic algorithm

  1. Verify the code with a diagnostic scan tool and note freeze frame / related codes.
  2. Follow all manufacturer SRS safety procedures before any inspection or measurement (disconnect battery negative and wait the specified time — consult Hyundai service manual).
  3. Visually inspect the passenger airbag connector(s) and harness for obvious damage, disconnection, corrosion, or pushed-out pins.
  4. With the battery disconnected and SRS system made safe, measure resistance across the passenger squib terminals at the airbag connector. Compare to expected low-resistance value; an open reading indicates a break or open squib.
  5. If open at the airbag connector, disconnect and inspect intermediate connectors and harness toward the SRS control module — perform continuity checks segment-by-segment to locate open.
  6. If continuity is good at the airbag connector but open at the SRS module harness, inspect/repair wiring between them and the module connector.
  7. Repair found faults (re-pin, replace damaged wiring, repair connector, or replace airbag module if internal squib is open). Use proper SRS repair parts and connectors.
  8. After repairs, reconnect battery (per safety procedures) and clear codes with scan tool. Re-scan to confirm B1234 does not return and that the SRS system shows normal status.
  9. If code persists after wiring and connector repairs, suspect faulty SRS control module or incorrect repair; consult manufacturer service information and consider module testing/replacement at qualified facility.

Likely causes

  • Loose or disconnected connector at the passenger airbag
  • Wiring damage in the harness (seat rails, under-dash, or door hinge area if routed)
  • Open squib inside the passenger airbag (after deployment or internal failure)
  • Corroded/crushed terminals at mating connectors

Fault status

⚠️ Status
Front passenger airbag squib circuit open — SRS fault stored (passenger airbag disabled).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1233 B1235 B1240 B1250 B1100
856

Browse 856 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1234

Other B — Body

Mirror Switch Invalid Code

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

Causes

  • Disconnected or poorly connected passenger airbag connector
  • Broken or chafed wiring in the squib harness (open circuit)
  • Corroded or bent terminal pins at connector
  • Removed or replaced seat/airbag component without proper reconnection
  • Failed passenger airbag module (open internal squib)
  • SRS control module or harness connector fault

Symptoms

  • SRS/Airbag warning light illuminated on instrument panel
  • Passenger airbag disabled or warning indicating passenger airbag fault
  • DTC B1234 stored in SRS control module
  • Possible loss of protection for front passenger in a crash

What to check

  • Read and record all SRS codes and freeze frame data with a capable scan tool
  • Check for additional SRS or related body codes (may help locate fault)
  • Visual inspection of passenger airbag connector (dash/seat) for disconnection, corrosion, pin damage
  • Inspect harness routing for chafing, breaks, or damage (under seat, seat rails, floor, dash)
  • Verify connector pin contact quality and proper mating
  • Check for evidence of prior deployment or repair in the passenger airbag area

Signal parameters

  • Expected squib continuity: low resistance (typically around 1–5 Ω depending on manufacturer and squib design)
  • Open-circuit condition: infinite resistance or OL on meter
  • SRS module monitors continuity; no normal continuous 12 V supply to squib until deployment signal
  • Resistance should be measured with battery disconnected and SRS system made safe per service manual

Diagnostic algorithm

  1. Verify the code with a diagnostic scan tool and note freeze frame / related codes.
  2. Follow all manufacturer SRS safety procedures before any inspection or measurement (disconnect battery negative and wait the specified time — consult Hyundai service manual).
  3. Visually inspect the passenger airbag connector(s) and harness for obvious damage, disconnection, corrosion, or pushed-out pins.
  4. With the battery disconnected and SRS system made safe, measure resistance across the passenger squib terminals at the airbag connector. Compare to expected low-resistance value; an open reading indicates a break or open squib.
  5. If open at the airbag connector, disconnect and inspect intermediate connectors and harness toward the SRS control module — perform continuity checks segment-by-segment to locate open.
  6. If continuity is good at the airbag connector but open at the SRS module harness, inspect/repair wiring between them and the module connector.
  7. Repair found faults (re-pin, replace damaged wiring, repair connector, or replace airbag module if internal squib is open). Use proper SRS repair parts and connectors.
  8. After repairs, reconnect battery (per safety procedures) and clear codes with scan tool. Re-scan to confirm B1234 does not return and that the SRS system shows normal status.
  9. If code persists after wiring and connector repairs, suspect faulty SRS control module or incorrect repair; consult manufacturer service information and consider module testing/replacement at qualified facility.

Likely causes

  • Loose or disconnected connector at the passenger airbag
  • Wiring damage in the harness (seat rails, under-dash, or door hinge area if routed)
  • Open squib inside the passenger airbag (after deployment or internal failure)
  • Corroded/crushed terminals at mating connectors

Fault status

⚠️ Status
Front passenger airbag squib circuit open — SRS fault stored (passenger airbag disabled).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1233 B1235 B1240 B1250 B1100
10,752

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