Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B1A25 — ignition Driver's seat belt pretensioner control implantation - short circuit in the ignition circuit

B1A25 — ignition Driver's seat belt pretensioner control implantation - short circuit in the ignition circuit

Detailed page for trouble code B1A25.

33,946codes
59brands
11,455generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B1A25

LAND ROVER B — Body

ignition Driver's seat belt pretensioner control implantation - short circuit in the ignition circuit

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

Causes

  • Damaged or chafed wiring in the driver's seat pretensioner ignition feed causing short to battery or fused ignition circuit
  • Corroded, bent or contaminated connector pins at the seat/pretensioner/ECU connectors allowing unintended continuity
  • Failed pretensioner squib with internal short
  • Poorly executed previous repair or splice in the seat/pretensioner wiring
  • Faulty SRS/airbag control module or internal driver circuit fault
  • Water ingress into seat base or connector causing conductive path

Symptoms

  • SRS/airbag warning lamp illuminated on instrument cluster
  • Possible seat belt pretensioner disabled message or other SRS-related warnings
  • Intermittent or permanent SRS lamp depending on whether the short is intermittent
  • Possible loss of seat functions if related harness damage affects other circuits

What to check

  • Read SRS module fault memory and freeze frame data with a capable scan tool
  • Confirm SRS lamp status and any related diagnostic trouble codes
  • Perform careful visual inspection of seat, seat base, seat belt pretensioner connector and B-pillar harness for damage, corrosion or signs of repair
  • With battery disconnected per safety procedure, measure continuity/resistance of the pretensioner squib and wiring to detect shorts to power or ground
  • With appropriate precautions and a second person, measure voltage on the pretensioner ignition feed with ignition ON (do not short terminals)
  • Check fuses and ignition feed circuits for unexpected continuity or low resistance paths

Signal parameters

  • Pretensioner squib resistance (typical): approximately 1–5 Ω for intact squib (manufacturer spec varies)
  • Open circuit: very high/OL (>1000 Ω) indicates broken coil
  • Short to battery/ignition: near 0 Ω or continuity to battery positive when measured to chassis ground or feed
  • Ignition feed voltage with key ON: approx. battery voltage (~11–14 V) on the feed pin (verify spec)
  • SRS module sees low-resistance or overvoltage on the pretensioner circuit when fault set

Diagnostic algorithm

  1. Safety first: follow manufacturer SRS safety procedures. Disable the vehicle battery (negative terminal) and wait the manufacturer-specified time before accessing airbag system connectors or pretensioner. Wear ESD precautions and do not use high-current test methods on squibs.
  2. Connect an SRS scan tool and record B1A25 and any related codes/freeze frame. Note whether code is stored or active and any occurrence counts.
  3. Visually inspect seat area, connectors (seat base, B-pillar), seat belt pretensioner connector and wiring harness for damage, corrosion, crushed wires or aftermarket splices.
  4. With battery disconnected, measure resistance across the pretensioner squib at the connector. Compare to manufacturer specification (typical low ohms). If nearly zero to battery feed or short to positive is present, suspect short.
  5. Check for short to ignition feed: with connector disconnected, measure resistance between the pretensioner positive feed and battery positive/ignition feed. Resistance near 0 Ω indicates short to ignition feed. Also measure continuity to chassis ground to identify unintended paths.
  6. If wiring appears intact, disconnect the pretensioner/squib from the harness and clear codes, then reconnect battery and rescan. If the code no longer appears, the fault is likely in the pretensioner or seat assembly wiring. If it remains, suspect harness upstream or control module.
  7. Wiggle test harness and connectors while monitoring live data/faults to reproduce intermittent short. Inspect for pin damage or bent terminals causing intermittent contact to power.
  8. If squib is confirmed shorted or connector is damaged, replace the pretensioner and/or repair wiring with correct SRS-approved connectors and crimps. Replace any contaminated or corroded connectors. Avoid using generic splices; follow manufacturer methods.
  9. After repair, clear codes, perform an SRS system self-test with scan tool and verify no new codes. Refit all components, reconnect battery, and verify SRS lamp extinguishes and no further faults return.
  10. If wiring and pretensioner test good and fault persists, consider SRS control module internal fault and consult manufacturer service information for module testing or replacement.

Likely causes

  • Chafed harness where it passes through the B-pillar or under the seat making contact with a power feed
  • Damaged connector at the seat belt pretensioner or at the seat control module
  • Shorted pretensioner squib (low ohm short to ignition feed)
  • Blown or shorted ignition feed fuse or harness splice near ignition source

Fault status

⚠️ Status
B1A25 — Driver’s seat belt pretensioner ignition circuit: short to ignition feed detected. SRS warning lamp likely illuminated; fault stored in SRS module.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1A24 B1A26 B1A2A B0100 B1000
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

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

B1A25

MITSUBISHI B — Body

Transponder ID unmatched

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

Causes

  • Damaged or chafed wiring in the driver's seat pretensioner ignition feed causing short to battery or fused ignition circuit
  • Corroded, bent or contaminated connector pins at the seat/pretensioner/ECU connectors allowing unintended continuity
  • Failed pretensioner squib with internal short
  • Poorly executed previous repair or splice in the seat/pretensioner wiring
  • Faulty SRS/airbag control module or internal driver circuit fault
  • Water ingress into seat base or connector causing conductive path

Symptoms

  • SRS/airbag warning lamp illuminated on instrument cluster
  • Possible seat belt pretensioner disabled message or other SRS-related warnings
  • Intermittent or permanent SRS lamp depending on whether the short is intermittent
  • Possible loss of seat functions if related harness damage affects other circuits

What to check

  • Read SRS module fault memory and freeze frame data with a capable scan tool
  • Confirm SRS lamp status and any related diagnostic trouble codes
  • Perform careful visual inspection of seat, seat base, seat belt pretensioner connector and B-pillar harness for damage, corrosion or signs of repair
  • With battery disconnected per safety procedure, measure continuity/resistance of the pretensioner squib and wiring to detect shorts to power or ground
  • With appropriate precautions and a second person, measure voltage on the pretensioner ignition feed with ignition ON (do not short terminals)
  • Check fuses and ignition feed circuits for unexpected continuity or low resistance paths

Signal parameters

  • Pretensioner squib resistance (typical): approximately 1–5 Ω for intact squib (manufacturer spec varies)
  • Open circuit: very high/OL (>1000 Ω) indicates broken coil
  • Short to battery/ignition: near 0 Ω or continuity to battery positive when measured to chassis ground or feed
  • Ignition feed voltage with key ON: approx. battery voltage (~11–14 V) on the feed pin (verify spec)
  • SRS module sees low-resistance or overvoltage on the pretensioner circuit when fault set

Diagnostic algorithm

  1. Safety first: follow manufacturer SRS safety procedures. Disable the vehicle battery (negative terminal) and wait the manufacturer-specified time before accessing airbag system connectors or pretensioner. Wear ESD precautions and do not use high-current test methods on squibs.
  2. Connect an SRS scan tool and record B1A25 and any related codes/freeze frame. Note whether code is stored or active and any occurrence counts.
  3. Visually inspect seat area, connectors (seat base, B-pillar), seat belt pretensioner connector and wiring harness for damage, corrosion, crushed wires or aftermarket splices.
  4. With battery disconnected, measure resistance across the pretensioner squib at the connector. Compare to manufacturer specification (typical low ohms). If nearly zero to battery feed or short to positive is present, suspect short.
  5. Check for short to ignition feed: with connector disconnected, measure resistance between the pretensioner positive feed and battery positive/ignition feed. Resistance near 0 Ω indicates short to ignition feed. Also measure continuity to chassis ground to identify unintended paths.
  6. If wiring appears intact, disconnect the pretensioner/squib from the harness and clear codes, then reconnect battery and rescan. If the code no longer appears, the fault is likely in the pretensioner or seat assembly wiring. If it remains, suspect harness upstream or control module.
  7. Wiggle test harness and connectors while monitoring live data/faults to reproduce intermittent short. Inspect for pin damage or bent terminals causing intermittent contact to power.
  8. If squib is confirmed shorted or connector is damaged, replace the pretensioner and/or repair wiring with correct SRS-approved connectors and crimps. Replace any contaminated or corroded connectors. Avoid using generic splices; follow manufacturer methods.
  9. After repair, clear codes, perform an SRS system self-test with scan tool and verify no new codes. Refit all components, reconnect battery, and verify SRS lamp extinguishes and no further faults return.
  10. If wiring and pretensioner test good and fault persists, consider SRS control module internal fault and consult manufacturer service information for module testing or replacement.

Likely causes

  • Chafed harness where it passes through the B-pillar or under the seat making contact with a power feed
  • Damaged connector at the seat belt pretensioner or at the seat control module
  • Shorted pretensioner squib (low ohm short to ignition feed)
  • Blown or shorted ignition feed fuse or harness splice near ignition source

Fault status

⚠️ Status
B1A25 — Driver’s seat belt pretensioner ignition circuit: short to ignition feed detected. SRS warning lamp likely illuminated; fault stored in SRS module.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1A24 B1A26 B1A2A B0100 B1000
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .