Drivers notice the seat‑belt warning light staying on even though the belt is fastened, or the chime that normally reminds you to buckle does not sound. In some vehicles the instrument panel may display a “Belt‑out” or “Seat‑belt not fastened” message despite a properly latched belt. The warning persists after a restart and can appear intermittently or continuously. Because the sensor also informs the air‑bag system whether a belt is secured, a fault can suppress belt‑related safety alerts, reducing the vehicle’s overall restraint awareness.
The tension sensor contains a strain‑gauge or potentiometer that changes resistance as the belt is pulled. Internal wire breakage, corrosion, or a shorted element can produce out‑of‑range values, prompting the BCM to log B0060.
The sensor’s harness runs through the seat frame and is exposed to flexing, moisture, and debris. Cracked insulation, corroded pins, or a loose connector can interrupt the signal, causing the BCM to register a fault.
Even with a healthy sensor, the Body Control Module may fail to interpret the signal due to corrupted firmware, internal circuit damage, or a loss of power on the BCM’s communication bus (CAN‑L/CAN‑H). The BCM then stores B0060 as a generic sensor‑communication error.
The sensor receives a low‑level reference voltage from the BCM. A voltage drop below the specified 5 V ± 0.5 V range—often caused by a weak battery or a failing BCM regulator—will make the sensor appear out of tolerance.
Extreme temperatures, exposure to seat‑belt cleaning chemicals, or prolonged seat‑belt wear can degrade the sensor’s mechanical components, leading to erratic resistance changes that trigger the code.
– Connect a professional OBD‑II scanner capable of reading SRS/BCM codes.
– Verify that B0060 is present and note any accompanying codes (e.g., BCM‑C1234) that may indicate a broader communication issue.
– Using a multimeter, check the sensor’s reference voltage at the connector (5 V ± 0.5 V).
– Verify ground continuity; resistance should be less than 5 Ω.
– Visually examine the harness for cracked insulation, pin corrosion, or loose clips.
– Apply dielectric grease and reseat the connector to eliminate intermittent contact.
– With the ignition off, measure the sensor’s resistance at the connector.
– Compare the reading to the manufacturer’s specification (typically 300–800 Ω at rest, rising with tension).
– If the value is out of range or fluctuates while manually pulling the belt, the sensor is likely defective.
– Use the scanner’s “Live Data” mode to view the sensor signal as reported by the BCM.
– If the signal is absent despite a good sensor reading, the BCM’s input circuit may be compromised.
– Clear the B0060 code and perform a “BCM reset” procedure (often a specific ignition‑key sequence).
– Re‑scan after a short drive; if the code returns, proceed to component replacement.
– If the sensor fails the resistance test or shows physical damage, replace the tension sensor assembly.
– If the BCM input circuit is defective, consider BCM repair or replacement (subject to cost‑benefit analysis).
Typical costs
Repeated B0060 entries after multiple sensor‑test cycles, visible damage to the sensor housing, or simultaneous BCM‑related codes suggest that a simple repair will be short‑lived. In these situations, replacing the sensor eliminates the root cause and restores reliable belt‑status reporting.
If the BCM consistently fails to acknowledge a functional sensor—evidenced by a healthy sensor reading but persistent B0060 and additional BCM fault codes—replacing the BCM may be more cost‑effective than repeatedly swapping the sensor.
Choose replacement when:
A proper replacement restores the safety‑system logic, ensuring the seat‑belt reminder and air‑bag readiness functions operate as engineered.
Service Recommendation: Most issues related to this fault are diagnosed and corrected through inspection, wiring repair, and calibration rather than module replacement. For modules not typically replaced through aftermarket suppliers, diagnosis and repair should be performed by a certified automotive technician with access to factory service information and tooling.