LCM Alert Validation

Confidence

Failure Category

Smart 7

Subcategory

no defect found (confirmed with PCT)

Sensor Verdict: The LCM sensor generated an alert on the BLACK circuit, which governs clearance and license plate lighting on trailer HV2303067. Based on the available evidence, the sensor result is assessed as Inconclusive with moderate-low confidence (42%). The vendor found all lights functional upon inspection, which could indicate the LCM alert was triggered by a loose terminal connection in the Smart 7 nosebox rather than an actual lamp failure. However, intermittent faults caused by loose terminals are real electrical defects, so the alert cannot be dismissed as entirely false — the tightening of terminals likely resolved the root cause of the fault signal.

Photo Evidence: The submitted photos show a reasonably comprehensive walk-around of trailer HV2303067. Photos TC_08181 and TC_08182 show the front top corner amber clearance lights illuminated. Photo TC_08183 and TC_08192 show amber mid-turn/side marker lights illuminated on both sides. Photos TC_08184 and TC_08191 show small red identification/clearance lights at the rear corners illuminated. Photos TC_08186, TC_08187, TC_08188, and TC_08189 show the rear ICC/tail light assembly with red brake/tail lights and the small center red brake light illuminated. Photo TC_08190 shows the Indiana license plate (PB53522) with what appears to be the license plate illumination lamp lit. Photo TC_08180 shows the nosebox with extensive wiring — the wiring appears congested but no obvious damage is documented in the notes. Photo TC_08179 shows the 7-way trailer connector with the cover open. The PCT app screenshots (IMG_2225 and IMG_2226) confirm all five circuits — Red, Green, Yellow, Brown, and Black — show as 'Verified' with no defects. Notably, no photos explicitly isolate a failed or damaged BLACK circuit (clearance/license plate) component, which is the faulted circuit in question. Photo TC_08193 shows the rear top clearance lights which appear to be red and lit, consistent with the BLACK circuit, but no close-up of a specifically failed lamp is provided.

Vendor Compliance: The vendor partially followed the LCM troubleshooting procedure. Positively, the PCT TechAssist app was used and a Job Summary screenshot (IMG_2226) confirms all circuits were verified, and a Sensor Details screenshot (IMG_2225) shows all five circuits marked 'Verified.' Photos of multiple lights illuminated were taken. However, compliance is incomplete: the vendor's notes are poorly written and lack specificity regarding what was found on the BLACK circuit specifically. The required feedback category language (e.g., 'no defect found - confirmed with PCT,' 'loose terminal in nosebox') was not explicitly used in the notes. The nosebox photo (TC_08180) is present but shows a very congested wiring box without any annotation identifying which terminal was loose or which circuit was affected. The IMG_2211 screenshot also reveals an 'ATIS Lamp' sensor showing 'Not Connected / Unverified,' which was not addressed in the vendor notes and represents an unresolved sensor issue on this trailer.

Repair Summary: The primary repair action was tightening all terminals in the Smart 7 nosebox and verifying all circuits through the PCT app. No lamps were replaced. The line items reflect a PCT sensor activation fee, standard service labor (0.1 hrs), lot service hourly labor (0.5 hrs), and shop supply fees — indicating minimal billable work. No lighting parts were replaced. The corrective action of tightening nosebox terminals is a reasonable response to an intermittent BLACK circuit alert, as loose terminals are a known cause of false or intermittent LCM faults. The alerting BLACK circuit was not explicitly called out as repaired with a specific part replacement, but the terminal tightening likely addressed the root cause indirectly.

Key Concerns: Several concerns are flagged for this work order. First, the 'ATIS Lamp' sensor shown as 'Not Connected / Unverified' in the Gateway Details screenshot (IMG_2211) was not mentioned or addressed in the vendor notes — this is an open issue that should be escalated. Second, the vendor notes are difficult to read and lack professional documentation quality, making it hard to confirm exactly what was found on the BLACK circuit. Third, no specific defective component was identified or replaced, meaning if the loose terminal was only tightened and not further investigated, the fault could recur. Fourth, the line item categorization using 'Tire pressure inflation and monitoring systems > Sensor - speed' for a PCT sensor activation is a miscategorization and may indicate billing/coding irregularities. Fifth, the VIN on the gateway (3H3V532K1PS062125 per IMG_2211) matches the plate data (Photo 1), confirming asset identity is correct. Overall, the work order shows the vendor did use the PCT app and found no active defect, but documentation quality and the unresolved ATIS Lamp sensor are notable gaps.