Code
B1610
MITSUBISHI
B — Body
PS pretensioner squib open
Views:
UK: 8
EN: 16
RU: 13
AI status
Completed
Completed
100%
Causes
- Open circuit (broken wire) in the passenger pretensioner squib harness
- Loose or disconnected connector at the pretensioner or SRS ECU
- Corroded/damaged connector pins or contact contamination
- Faulty passenger pretensioner squib (internal open)
- Damage to wiring caused by seat movement, repairs or previous deployment
- Faulty SRS control module or internal connector fault
Symptoms
- SRS / airbag warning lamp illuminated on instrument panel
- Passenger pretensioner channel flagged in SRS diagnostic data
- Possible disablement of passenger pretensioner deployment until repaired
- No other drivability symptoms (engine normally unaffected)
What to check
- Read and record all SRS-related DTCs and freeze frame data with a capable scan tool
- Visually inspect passenger seat, seatbelt buckle/retractor area and harness for damage, chafing or disconnected connectors
- Check connector locking tabs and pin condition at the pretensioner and at any harness junctions
- Confirm whether the vehicle has a history of airbag deployment or repair (deployed modules may have cut wires)
- Follow manufacturer safety procedure: disable SRS power (battery disconnect and specified wait time) before touching airbag/pretensioner connectors
Signal parameters
- Intact pretensioner squib: low resistance (squib coils generally read low ohms — typically in the ~0.5–5 Ω range for many systems)
- Open circuit: infinite/very high resistance (no continuity)
- Short to ground/voltage would show near 0 Ω or low resistance to chassis (different DTC)
- SRS ECU will report the B1610 event and may show live status for the passenger pretensioner channel
Diagnostic algorithm
- Connect SRS-capable scan tool, retrieve and note all airbag DTCs and freeze frame information. Verify B1610 is current. 2) Follow manufacturer SRS safety procedure: switch ignition off, disconnect negative battery terminal and wait specified time (refer to service manual) before touching airbag components. 3) Visually inspect passenger pretensioner, buckle/retractor and harness routing for obvious damage, chafing, connector corrosion or disconnected plugs. 4) With power disabled, disconnect the pretensioner connector and measure resistance of the squib with a digital multimeter; compare to manufacturer specification. An open (OL/infinite) indicates a wiring break or failed squib. 5) Perform continuity check from the pretensioner connector back to the SRS ECU connector pins to locate an open. Wiggle wiring through seat travel while monitoring continuity for intermittent faults. 6) Inspect and repair any damaged wiring, terminals or connectors (replace corroded pins, repair harness using proper crimps/solder and insulation / shrink tubing). 7) If wiring and connectors are good but resistance is out of spec, replace the pretensioner assembly. 8) After repairs, reconnect battery, clear codes with the scan tool, then cycle ignition and verify SRS lamp extinguishes and no B1610 reappears. 9) If fault remains with confirmed good wiring and pretensioner, consider SRS ECU or module connector faults and consult dealer/service manual for module-level diagnostics or replacement. Always follow the vehicle manufacturer’s service manual and safety rules when handling SRS components.
Likely causes
- Open or high-resistance condition in pretensioner squib wiring (most likely)
- Disconnected/poorly seated connector at the pretensioner or seat harness
- Physical damage to harness routed through seat tracks or B-pillar
- Failed pretensioner element after prior deployment
- Connector corrosion or water ingress causing loss of continuity
Fault status
Status
SRS control module detected an open circuit in the passenger-side seatbelt pretensioner squib (B1610). The SRS warning lamp will illuminate and the passenger pretensioner may not be available for deployment until the fault is repaired. Inspect harness, connectors and pretensioner for open or damaged circuit and repair per service manual.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
B1610
Other
B — Body
Illuminated Entry Input Short Circuit To Ground
Views:
UK: 14
EN: 32
RU: 21
AI status
Completed
Completed
100%
Causes
- Open circuit (broken wire) in the passenger pretensioner squib harness
- Loose or disconnected connector at the pretensioner or SRS ECU
- Corroded/damaged connector pins or contact contamination
- Faulty passenger pretensioner squib (internal open)
- Damage to wiring caused by seat movement, repairs or previous deployment
- Faulty SRS control module or internal connector fault
Symptoms
- SRS / airbag warning lamp illuminated on instrument panel
- Passenger pretensioner channel flagged in SRS diagnostic data
- Possible disablement of passenger pretensioner deployment until repaired
- No other drivability symptoms (engine normally unaffected)
What to check
- Read and record all SRS-related DTCs and freeze frame data with a capable scan tool
- Visually inspect passenger seat, seatbelt buckle/retractor area and harness for damage, chafing or disconnected connectors
- Check connector locking tabs and pin condition at the pretensioner and at any harness junctions
- Confirm whether the vehicle has a history of airbag deployment or repair (deployed modules may have cut wires)
- Follow manufacturer safety procedure: disable SRS power (battery disconnect and specified wait time) before touching airbag/pretensioner connectors
Signal parameters
- Intact pretensioner squib: low resistance (squib coils generally read low ohms — typically in the ~0.5–5 Ω range for many systems)
- Open circuit: infinite/very high resistance (no continuity)
- Short to ground/voltage would show near 0 Ω or low resistance to chassis (different DTC)
- SRS ECU will report the B1610 event and may show live status for the passenger pretensioner channel
Diagnostic algorithm
- Connect SRS-capable scan tool, retrieve and note all airbag DTCs and freeze frame information. Verify B1610 is current. 2) Follow manufacturer SRS safety procedure: switch ignition off, disconnect negative battery terminal and wait specified time (refer to service manual) before touching airbag components. 3) Visually inspect passenger pretensioner, buckle/retractor and harness routing for obvious damage, chafing, connector corrosion or disconnected plugs. 4) With power disabled, disconnect the pretensioner connector and measure resistance of the squib with a digital multimeter; compare to manufacturer specification. An open (OL/infinite) indicates a wiring break or failed squib. 5) Perform continuity check from the pretensioner connector back to the SRS ECU connector pins to locate an open. Wiggle wiring through seat travel while monitoring continuity for intermittent faults. 6) Inspect and repair any damaged wiring, terminals or connectors (replace corroded pins, repair harness using proper crimps/solder and insulation / shrink tubing). 7) If wiring and connectors are good but resistance is out of spec, replace the pretensioner assembly. 8) After repairs, reconnect battery, clear codes with the scan tool, then cycle ignition and verify SRS lamp extinguishes and no B1610 reappears. 9) If fault remains with confirmed good wiring and pretensioner, consider SRS ECU or module connector faults and consult dealer/service manual for module-level diagnostics or replacement. Always follow the vehicle manufacturer’s service manual and safety rules when handling SRS components.
Likely causes
- Open or high-resistance condition in pretensioner squib wiring (most likely)
- Disconnected/poorly seated connector at the pretensioner or seat harness
- Physical damage to harness routed through seat tracks or B-pillar
- Failed pretensioner element after prior deployment
- Connector corrosion or water ingress causing loss of continuity
Fault status
Status
SRS control module detected an open circuit in the passenger-side seatbelt pretensioner squib (B1610). The SRS warning lamp will illuminate and the passenger pretensioner may not be available for deployment until the fault is repaired. Inspect harness, connectors and pretensioner for open or damaged circuit and repair per service manual.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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