LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM system generated an alert on the RED (Brake) circuit for trailer V566856 at site DEN4. Based on the available evidence, the sensor result is rated Inconclusive with a confidence of 35%. The vendor verbally claims all lights are working and references use of the Phillips app, but there is no documentation — photographic or otherwise — to substantiate that claim. The lack of supporting evidence makes it impossible to definitively determine whether the original alert represented a true defect that was subsequently self-corrected (e.g., a loose connection that reseated itself) or whether the sensor fired on a transient condition. No repairs were made to the alerting circuit, which could indicate either a no-fault-found scenario or a missed defect.

Photo Evidence: No photos were 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 completion screenshot showing a green 'Verified' status beside each of the five circuits. None of these documentation requirements were met. Without visual evidence, it is impossible to assess the condition of the brake lights, the nosebox wiring integrity, or connector condition. This is a significant compliance gap and renders the vendor's verbal assurance unverifiable.

Vendor Compliance: The vendor's compliance with the prescribed LCM troubleshooting procedure is poor. While the technician mentions using the Phillips app, there is no TechAssist completion screenshot provided, no categorized feedback from the defined expected feedback list (e.g., 'no defect found (confirmed with PCT)'), and no photographic documentation of any kind. The notes are brief and non-specific, lacking any detail about what was observed on the RED Brake circuit specifically. The procedure requires structured, documented findings — the technician's freeform text falls well short of this standard. Additionally, the phrasing 'I WAS ABLE TO VERIFY ALL THE LIGHTS ARE WORKING FINE' does not align with the required output of the TechAssist workflow, suggesting the app may not have been used in the intended diagnostic capacity.

Repair Summary: No repairs were made to the RED (Brake) circuit or any lighting component on this trailer. The line items billed include two generic 'LITE MECHANICAL / Indirect charge' entries, a PCT sensor activation (categorized under tire pressure monitoring — unrelated to lighting), standard service labor, a shop supply fee, and lot service hourly labor. None of these line items reflect lighting-specific diagnosis, parts replacement, or wiring repair on the brake circuit. The inclusion of a 'PCT sensor activation' line item is particularly unusual for a lighting work order and may indicate scope creep, billing irregularities, or a misapplied line item from an unrelated service.

Key Concerns: Several red flags are present in this work order. First, the complete absence of photos or TechAssist screenshots is a direct violation of the documented troubleshooting procedure. Second, the PCT sensor activation line item is unrelated to a brake light circuit alert and warrants review for potential billing inaccuracy. Third, the two duplicate 'LITE MECHANICAL / Indirect charge' entries with no associated cost or description are vague and non-informative. Fourth, the vendor's notes do not reference the specific RED (Brake) circuit by name, raising questions about whether the correct circuit was even evaluated. This work order should be flagged for vendor follow-up to provide required photo documentation and clarify the PCT sensor line item. Until documentation is provided, this alert cannot be closed as a confirmed no-fault-found.