B0058

Code

Generic B — Body

Third Row Right Seat Belt Sensor

Brand: Generic

Type: B — Body

Views: UK: 24 EN: 38 RU: 30

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Pull vehicle codes and freeze frame with a diagnostic scanner; verify B0058 and any related codes
Visually inspect the third row right buckle, harness, and connectors for damage, corrosion or water
Wiggle the seat, harness and connector while watching live data to detect intermittent signals
Check connector mating, pins, and retention; look for pushed‑out or bent terminals
Measure reference voltage and ground at the buckle connector (consult vehicle manual for exact pins)
Check resistance/continuity of buckle switch with seat unbuckled and buckled (power off)

Typical buckle switch behavior: closed (latched) = continuity/low ohms; open (unlatched) = high resistance/OL
Typical reference voltage: ~5 V or vehicle-specific sensor reference (verify in service manual)
Signal line idle voltage often pulled to reference via module; when closed may be near ground
Expected closed‑state resistance: near 0–50 ohms (sensor dependent); open state: >>1 kΩ or open circuit
No PWM frequency expected for a simple switch; occupancy sensors may use digital or variable signals (vehicle dependent)

Connect ECU scan tool, record DTC B0058 and any related codes; note freeze frame and occurrence.
Attempt to clear codes and see if B0058 returns immediately or after a drive/wiggle test.
Visually inspect the third‑row right buckle, harness routing, and connectors for damage, corrosion or water intrusion. Repair as needed.
With ignition OFF, unplug the buckle connector and inspect terminals for corrosion, bent pins or pushed‑out terminals. Reinsert connector firmly.
With ignition ON, backprobe the connector or harness at the module end and verify reference voltage and ground per service manual. If no reference, trace upstream to module and check fuses and grounds.
With ignition OFF, measure continuity/resistance across the buckle switch while buckling/unbuckling to confirm the switch changes state. Replace buckle if switch is stuck or out of expected resistance range.
Perform a continuity check from the buckle connector to the module connector to find opens or shorts. Wiggle harness to reproduce intermittent faults.
If wiring and buckle test good, verify module inputs and grounds. Check for software or calibration updates and reprogram if required by the manufacturer.
Replace the buckle/sensor assembly if it fails bench or in‑vehicle tests. After repairs, clear codes and verify no reoccurrence during normal operation.
Always follow manufacturer SRS/airbag service procedures (disable system per service manual) before disconnecting/working on seat or restraint wiring.