B00B2

Code

Generic B — Body

Driver Seat Occupant Classification Sensor C

Brand: Generic

Type: B — Body

Views: UK: 21 EN: 30 RU: 31

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or chafed wiring harness to driver seat occupant classification sensor C
Corroded, loose or disconnected connector at the seat sensor or module
Failed occupant classification sensor module (seat pad or sensor assembly)
Water/moisture intrusion in seat cushion or connector
Poor ground or short to battery voltage in the sensor circuit
Incorrect or incomplete previous seat repair (airbag/seat removal)

Symptoms

SRS/airbag warning lamp illuminated
Possible passenger/driver airbag disable or incorrect passenger presence indication
Seatbelt reminder or occupant classification warnings on the dash or infotainment display
DTC stored in airbag/occupant classification control module

What to check

Read and record all stored codes and freeze frame data with a scan tool that supports SRS/occupant classification systems
Inspect the driver seat (cushion) connectors and harness for damage, corrosion, or water intrusion
Visually inspect seat repair history (aftermarket/heavy repairs) and mounting hardware
Check connector mating and wiring routing for chafing at seat rails and under-seat components
Verify SRS module power and ground circuits are intact
Use live-data view on a scan tool to observe sensor C output while performing occupant/no-occupant tests

Signal parameters

Sensor operates on low-voltage reference (typically a 5 V reference from control module) — expected sensor output within 0–5 V range
Empty seat: sensor output typically near low end of range; occupied: output shifts toward mid/high range depending on sensor design (varies by vehicle)
Open circuit: infinite/very high resistance or sensor output no-change; short-to-ground: ~0 V; short-to-battery: ~12 V (may damage electronics)
Exact voltage/resistance values are vehicle-specific — consult manufacturer service data for nominal values

Diagnostic algorithm

Read and record DTC(s) and related modules’ codes using a capable scan tool. Note whether the code is current or history and any freeze-frame data.
Follow safety procedures for SRS work: disable battery/ignition and wait the manufacturer-specified time before disconnecting seat connectors.
Visually inspect the driver seat cushion and underside: connectors, wiring harness, seat rail areas, and any signs of water, corrosion, or physical damage.
Reconnect battery/restore power and use scan tool live data to monitor sensor C output while seating/standing on the seat; observe for changes and for intermittent faults while performing a gentle wiggle test on the harness and connectors.
Backprobe the sensor connector with reference voltage applied: verify reference voltage present at the module pin (typically ~5 V), measure sensor output voltage, and check for proper ground at the module.
If open/short suspected, perform continuity and resistance checks between the sensor connector and the occupant classification control module; repair broken wires or terminals.
If wiring and connectors are good but sensor output is out of range or inconsistent, replace sensor C (seat pad/module) per manufacturer procedure.
After repair, clear codes, perform any required occupant classification calibration or zeroing procedure, then confirm with scan tool that DTC does not return and that occupant detection behaves correctly.
If problem persists after sensor replacement, suspect control module fault and follow manufacturer diagnostic flow for module replacement or reprogramming.

Likely causes

Sensor C module failure
Open or short in sensor C wiring (pin damage, broken wire)
Connector corrosion or not fully seated

Fault status

⚠️ Status

B00B2 — Driver Seat Occupant Classification Sensor C circuit fault detected (open/short/out-of-range). May affect passenger/airbag enable logic; SRS warning lamp likely illuminated.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours