Acting on Device Data

Understanding and responding appropriately to device data is essential for maintaining both vehicle safety and device reliability. The TraX system continuously monitors the condition of wheel ends and device components, reporting sensor states that indicate everything from normal operation to urgent faults.

This section provides practical guidelines for interpreting device data and prioritizing action. It outlines how different alarm states are classified, what each priority level means, and what steps to take in response. You’ll also find guidance on when and how to reset a device, how to determine if replacement is necessary, and how to interpret key indicators in the alarm state table. Together, these insights help ensure accurate diagnostics and timely intervention.

General Guidelines for Prioritizing Action Based on Device Data

Device data is categorized into five priority levels to guide the urgency of response. Each level corresponds to specific sensor conditions and is visually represented by a color code.

For more details on device features, refer to the Features article.

No Priorty (5)

• Criteria – Normal status, with no issues detected.
• Color code – 🟩 Green
• Action – None

Low Priorty (4)

• Criteria – The Wheel End feature reports No Data. <for how long?> And more?
• Color code – ⬜ Grey 
• Action – Alert the user. 

Medium Priorty (3)

• Criteria – The Battery Level feature reports a Low Battery status.
• Color code – 🟧 Orange 
• Action – Service is needed soon. Schedule maintenance promptly.

High Priorty (2)

• Criteria – The Wheel End Failure feature detects a fault, or when the Wheel End Monitoring or Temperature Sensor report an issue.
• Color code – 🟥 Red
• Action – Complete the current route, then have the issue inspected and resolved at a service facility before starting the next journey.

Critical Priorty (1)

• Criteria – Triggered when a Temperature Warning is issued. This warning is not generated by the device itself, but relies on implementation by the Telematics Provider.
• Color code – 🟥 Red
• Action – Do not continue the route, address the issue before proceeding.

Reset Options Available in the TraX Mobile App

The TraX mobile app provides two types of reset options, each serving a different purpose.

Reset an Alarm

The Reset Sensor feature in the TraX mobile app clears all active alarms and deletes all stored temperature data, without affecting the device’s configuration. However, not all alarms are eligible for this type of reset (as detailed in a later section). The reset procedure is detailed in the SKF TraX User Manual, section 6.12 Resetting the sensor.

Remove & Recommission the Device

Alternatively, you can use the Remove Sensor option in the TraX mobile app. This disconnects the device from the SKF platform but does not alter its current operational state.

To fully reset the device and restore its default configuration, you must recommission it. However, this reset is only temporary—once the process is complete, a new configuration will be applied shortly thereafter. As such, it is not possible to perform a factory reset and leave the device in an unconfigured state.

Determining When to Reset- or Replace a Device

As a general rule, statuses related to vehicle health—such as Wheel End Failure—can be reset. In contrast, statuses reflecting the device’s own operational issues cannot be reset and typically require the device to be replaced.

Exception: Wheel End Monitoring – Reversed Position is not a hardware failure. It indicates incorrect mounting and can be resolved by properly reinstalling the device.

Table: Alarm States & Device Behavior

The Duration column explains that while some states automatically reset after a set period, others—marked with an asterisk (*)—are persistently included in the data frame.

The LED Indicators columns indicate whether the device’s LEDs are used to signal the current state; these LEDs are only active when the vehicle is stationary. For more information, see sections 4.12 LED Blinking and 4.8 Changing Mode Description in the TraX Technical Specification.

The Reset by App column shows whether a state can be cleared using the TraX mobile application, whereas the Replace Device column specifies if the hardware must be replaced.

	Duration	LED Indicators	Reset via App	Replace Device
Wheel End Failure	14 days	✅	✅
WEM¹: WEM Failure	14 days	✅		✅
WEM¹: Piezo Failure	*			✅
Temperature Sensor Failure	*			✅
Battery Level Low, or, Extreme Low	*			✅

¹ WEM refers to Wheel End Monitoring.

In addition to the table above, common symptoms of sensor failure include (but are not limited to):

• No data transmission from the device.
• LED does not illuminate when triggered by the magnet.
• Damaged or broken metal baseplate.

Replacing a Device

Follow the steps below to replace a device:

1. Order a replacement device.
2. Remove the failed device from the vehicle.
3. Refer to Section 4 in the User Manual for mounting instructions.
4. Refer to Section 6.13 in the User Manual for activation instructions.

Inspecting a Vehicle After a Wheel End Failure Alarm

When a Wheel End Failure alarm is triggered, follow the steps below:

1. Inspect the entire wheel end. The alarm may be caused by issues other than a bearing failure, such as:
   • A damaged or deformed tire
   • A tire hernia or flat spot from heavy braking
   • Rim damage or a detached rim
2. Remove the device if necessary to access and inspect underlying components.
3. Identify and replace the faulty part, whether it's the bearing or another damaged component.
4. Reinstall the device after completing all repairs.
5. Reset the sensor using the TraX Mobile App (see Section 6.12 for detailed instructions).
6. Return any damaged bearings to SKF, if possible, for further analysis.