B0562

Code

Generic B — Body

Occupant Detection Sensor Circuit Short to Ground

Brand: Generic

Type: B — Body

Views: UK: 18 EN: 24 RU: 14

AI status

Completed

ready

Completed 100%

Page language: EN

Scan SRS/OCS module for B0562 and any related codes; capture freeze-frame/live data
Perform visual inspection of seat, underside, seat rails and connector for damage or moisture
Check connector pins for corrosion, bent pins, or foreign material
Wiggle test wiring while monitoring live data for intermittent changes
Verify aftermarket seat covers or accessories are removed before testing
Follow manufacturer SRS safety procedure (battery disconnect / SRS power down) before disconnecting connectors

Reference voltage (typical): ~5 V supply to sensor (varies by manufacturer)
Expected sensor signal: nominally between ~0.5–4.5 V during normal operation (manufacturer dependent)
Short-to-ground symptom: signal at or very near 0 V with ignition on
If sensor is resistive (mat type): expected resistance varies by design; short-to-ground shows very low resistance to chassis ground

Read and record all SRS/OCS codes and live data. Note whether passenger presence is reported.
Check for related codes (e.g., short-to-battery, open circuits) which can guide fault location.
Visually inspect passenger seat area, seams, underside and wiring harness routing for damage, moisture or aftermarket items.
With vehicle in ignition-on (engine off) state and following SRS safety procedures, probe the occupant sensor connector: measure reference supply voltage and sensor signal to ground. Compare to expected values.
If signal reads ~0 V, perform continuity check between signal conductor and chassis ground to confirm short. Pin-to-pin resistance testing can locate shorted conductor.
Isolate wiring: disconnect sensor connector at seat and re-check circuit at harness side. If short is still present at harness connector, trace harness toward control module and look for harness chafe points or pinched areas.
If harness is intact and connector/cable show no faults, replace the occupant detection sensor/mat assembly per manufacturer procedure.
After repair, clear codes and verify system returns to normal operation with correct occupant detection indications. Re-scan for stored codes and test-drive where required.
If the fault persists and wiring/connector and sensor check good, suspect SRS control module fault and follow manufacturer-specific diagnostics for module replacement or programming.

Signal conductor shorted to chassis ground due to pinched harness at seat rail
Failed seat occupancy sensor mat with internal short
Connector contamination/corrosion causing low-resistance path to ground
Incorrectly installed aftermarket accessory (heated seat, cover) creating shorts