LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM generated an alert on the RED (Brake) circuit for trailer HV2302520 at site DEN4. Based on the available evidence, the sensor result is classified as Inconclusive with a confidence of 35%. The technician verbally confirmed via the PCT app that all circuits are functioning, which would suggest a false alert or a transient fault; however, the complete absence of photographic documentation and the presence of unrelated line items make it impossible to validate this conclusion with any meaningful certainty. The sensor alert cannot be confirmed as a true defect, nor can it be confidently dismissed.

Photo Evidence: No photos were provided or attached to this work order. The LCM troubleshooting procedure explicitly requires photos of each light illuminated, a clear picture of the nosebox wiring, and a TechAssist app screenshot showing a green 'Verified' status beside each of the five circuits. The technician notes reference opening the Smart 7 nosebox and taking a picture, but no images are present in the submitted work order data. This is a significant documentation gap and a direct non-compliance with the prescribed procedure. Without photographic evidence, there is no way to visually verify the condition of the brake lights, the integrity of the nosebox wiring, or the PCT app results.

Vendor Compliance: Vendor compliance with the LCM troubleshooting procedure is poor. While the technician claims to have used the Phillips Connect TechAssist app — which would satisfy one element of the procedure — they failed to submit any of the required supporting documentation: no illuminated light photos, no nosebox photo, and no TechAssist 'Verified' screenshot. The technician notes are informal and lack specificity. The required feedback category from the defined list ('no defect found (confirmed with PCT)') is implied by the notes but never explicitly stated using the prescribed language. Overall, the vendor did not meet the documentation standards required for a properly completed LCM work order.

Repair Summary: No lighting repairs were made on this work order. The line items do not include any brake light components, bulbs, connectors, wiring, or nosebox-related parts. The only labor charged is 0.5 hours of lot service labor and 0.1 hours of standard service labor. Notably, there is a line item for a 'PCT Sensor Activation' part categorized under tire pressure monitoring, which is entirely unrelated to the faulted RED/Brake lighting circuit and raises concerns about billing accuracy or possible line item misclassification. The faulted RED circuit was not repaired, nor was any root cause identified and documented.

Key Concerns: Several concerns are flagged with this work order. First, the complete absence of photos is a critical deficiency that violates the explicit troubleshooting protocol and prevents any independent verification of the technician's findings. Second, the 'PCT Sensor Activation' line item is anomalous — it is categorized under tire/TPMS systems and has no apparent connection to a brake light circuit inspection, suggesting possible billing irregularities or work order confusion. Third, the technician notes, while mentioning the PCT app, are extremely brief and lack structured diagnostic feedback. Fourth, if the PCT app did confirm all circuits as verified, it is unclear why the LCM alert was triggered in the first place, and no explanation or hypothesis (e.g., loose connection that self-corrected, moisture intrusion) was offered. A follow-up with the vendor to obtain the TechAssist screenshot and clarify the PCT sensor activation charge is strongly recommended before closing this work order.