B0410

Code

Generic B — Body

Occupant Classification System (OCS) Circuit Fault

Brand: Generic

Type: B — Body

Views: UK: 20 EN: 29 RU: 24

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SRS/Airbag warning lamp illuminated
Passenger airbag may be disabled or incorrectly enabled
Passenger seat occupant status incorrect (e.g., showing unoccupied when occupied)
Diagnostic trouble code B0410 stored
Possible stored related network codes (LIN/CAN) or repeated faults after clearing

Read and record all SRS/OCS codes and freeze frame data with a capable scan tool
Visually inspect passenger seat, connectors under seat, and wiring for damage, corrosion, or moisture
Check connector pins for bent, pushed-out, or corroded terminals
Verify module and sensor ground(s) and battery supply voltage with key ON
Backprobe sensor signal and reference lines while occupant/unoccupied to confirm signal changes
Wiggle test harness and connectors while monitoring live data for intermittent faults

Vehicle battery/supply at OCS module: nominal 11–14 V with key ON
OCS sensor reference/signal: typically low-voltage analog (0–5 V) or digital/LIN messages depending on design
Expected behavior: measurable change in sensor output or LIN/CAN message when seat becomes occupied vs empty
Open-circuit often appears as fixed/no-change signal or out-of-range voltage; short to battery/ground will show near-constant high/low voltage
Resistance checks on pad sensors may show discontinuity or values outside manufacturer specs when faulty

Use a qualified scan tool to read DTC B0410 and any related codes; record freeze frame and live OCS data.
Follow safety procedures: disable the battery/airbag system per manufacturer instructions before performing physical work on the restraint system.
Visually inspect passenger seat and connectors. Remove seat trim as needed to access sensor connectors and wiring for damage or moisture.
Reconnect any loose connectors and clean corroded contacts with appropriate electrical contact cleaner; reseat firmly.
With ignition ON and airbag system enabled (if allowed by procedure), backprobe the sensor connector and monitor signal/reference voltage while placing weight on the seat. Look for expected signal change.
Check continuity and resistance of sensor circuit between sensor and OCS module; repair broken wires or poor grounds as required.
Perform a wiggle test on the harness while monitoring live data to find intermittent opens or shorts.
If wiring and connectors are good but sensor output is out of specification, replace the occupant sensor pad or buckle sensor as specified by manufacturer.
If sensor replacement does not clear the fault, check/replace the OCS or SRS control module following manufacturer procedures.
After repairs, clear codes and verify repair by rechecking live data and performing system self-tests. Road-test and confirm SRS lamp remains off.