Code
B3382
HUMMER
B — Body
Passenger Occupant Detection System — Sensor Fault
AI status
Completed
Completed
100%
Causes
- Damaged or shorted occupant detection sensor mat (seat cushion/seat back)
- Broken, corroded or disconnected wiring or connector under the passenger seat
- Faulty Occupant Classification/Passenger Sensing module
- Poor or missing module power or ground
- Water intrusion, contamination or seat foam damage affecting the sensor mat
- Incorrect or missing sensor calibration or software issue
Symptoms
- Airbag or SRS warning lamp illuminated on instrument cluster
- Passenger airbag status message incorrectly showing OFF or ON
- Passenger airbag may be disabled when a passenger is present or enabled when seat is empty
- Diagnostic trouble codes stored for occupant detection system (including B3382)
- Inability to complete sensor calibration or occupant classification self-test
What to check
- Read and record all stored SRS and occupant system DTCs and freeze frame data with a compatible scan tool
- Check battery voltage and confirm consistent power to the airbag/occupant module (typically 9–16 V during test)
- Visually inspect passenger seat: covers, foam, seat heaters, and for signs of moisture or damage
- Inspect connectors and wiring under the passenger seat for corrosion, pin damage, loose or backed-out terminals, and chafing from seat tracks
- With ignition on, monitor occupant classification module live data for sensor status, communication faults, and sensor zone values
- Perform wiggle tests on occupant sensor harness and connectors while watching live data or DTCs for intermittent changes
Signal parameters
- Occupant classification module should be powered and in ACTIVE state with no communication errors reported by the scan tool
- Sensor mat circuits: continuity present, no open or short-to-ground/short-to-power (resistance values vary by model — compare to service manual)
- Module power supply nominal: battery voltage present at module power pin(s) during tests (typically ~12 V with ignition on)
- Ground resistance low (near 0 ohms) between module ground pin and chassis ground
- Live data sensor zone values should change when a known weight is placed on the seat (see service info for expected behavior)
- No stray CAN/LIN communication errors between occupant module and airbag/driver restraint module
Diagnostic algorithm
- Retrieve and record all SRS/occupant-related DTCs and freeze-frame data with an OEM-capable scan tool. Note any other related codes. 2) Clear codes and perform a key cycle; re-scan to see if B3382 returns and under what conditions. 3) Visually inspect passenger seat for aftermarket covers, signs of moisture, damage to foam, or foreign objects. 4) Inspect connectors and wiring under the passenger seat for corrosion, loose terminals, and damage; reseat connectors and apply dielectric as required. 5) With scan tool, view occupant sensor live data or sensor-zone states while performing a wiggle test on harness and moving the seat through full travel; note intermittent behavior. 6) Measure supply voltage and ground at the occupant classification/passenger sensing module; repair power or ground issues before proceeding. 7) Measure continuity/resistance of individual sensor mat circuits per factory service manual. Replace mat if any circuit is open, shorted, or out of tolerance. 8) If wiring and mat check good, perform module diagnostics: check for module fault codes, communication errors, and perform module self-test or re-initialization. 9) Perform OEM occupant sensor calibration or reprogramming as required after repairs. 10) If all else fails, replace the occupant classification/passenger sensing module and retest. After repairs, clear codes and verify proper operation and that passenger airbag enable/disable behavior matches OEM specifications.
- similar_codes:[
Likely causes
- Loose, corroded, or disconnected connector at the occupant sensor mat or module
- Damaged wiring harness under the seat from seat track movement or technician interference
- Failed sensor mat (one or more sensing zones open or out of tolerance)
- Faulty Occupant Classification/Passenger Sensing module or related airbag control module
Fault status
Status
Passenger Occupant Detection System — Sensor Fault. The occupant sensing system has detected a fault in the passenger seat sensor circuitry or module. Passenger airbag enablement may be affected; inspection and repair required.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Repair manuals
Manual library for HUMMER
138
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