LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

no defect found (confirmed with PCT)

Sensor Verdict: The LCM system generated an alert on the BLACK circuit (Clearance/License Plate lights) for trailer WV2500712 at site DEN3. Based on the available evidence, this alert is rated Inconclusive with 42% confidence. The vendor's PCT app verification returned all circuits as 'Verified' with no defects, which is the primary basis for a no-fault-found conclusion. However, the sensor that originally triggered the alert may have had a transient fault, a loose Smart 7 connection, or a wiring issue that was corrected incidentally during inspection — meaning the alert could have been valid at time of trigger even if no persistent defect was found at time of service.

Photo Evidence: The photo set includes: a nosebox wiring photo (TC_07609) showing the Smart 7 junction box open with exposed wiring being inspected by a technician — wiring appears intact though somewhat disorganized; a rear trailer view showing the license plate lamp illuminated (TC_07614 shows an Indiana plate 'PE25805' with the plate light area visible); side marker/clearance lights appearing illuminated amber (TC_07612); brake/tail lights visible and appearing functional (TC_07615, TC_07616); front nosebox cap area (TC_07610, TC_07611) showing no obvious physical damage; and two PCT app screenshots (IMG_8047, IMG_8048) showing Gateway Details for WV2500712 connected to Amazon with all 5 circuits (Red, Green, Yellow, Brown, Black) marked as 'Verified — No defects.' Critically, the Gateway Details screen (IMG_8047) flags that the 'ATIS Lamp' sensor is 'Not Connected' and the gateway 'cannot find this sensor,' and the 'ATIS Regulatory' sensor also needs verification. This raises concern about the completeness of the system verification. Not all individual clearance/license plate lights are shown individually illuminated in isolation, making full circuit photo documentation incomplete.

Vendor Compliance: The vendor partially complied with the LCM troubleshooting procedure. They did use the Phillips Connect TechAssist app and captured screenshots showing circuit verification — this satisfies the core diagnostic requirement. They photographed the nosebox wiring and provided rear/side lamp photos. However, compliance is not fully met: individual lights in the BLACK circuit (each clearance light, the license plate light) are not each shown illuminated in dedicated photos as the procedure requires. The vendor notes are informal and contain multiple spelling/typographical errors, and the feedback language does not align precisely with the required feedback category list (e.g., they did not explicitly state 'no defect found (confirmed with PCT)' in the structured format expected). The unresolved ATIS Lamp sensor warning on the Gateway Details screen was not addressed in the notes.

Repair Summary: No repairs were made to address the BLACK circuit alert. Line items consist entirely of indirect electrical charges, a PCT sensor activation fee, standard service labor (0.1 hrs), shop supply fee ($3.05), and lot service hourly labor (0.5 hrs at $75.00). No parts (lamps, connectors, wiring) were replaced. The alerting circuit was not repaired because no defect was confirmed at time of service. The work appears to have been primarily a diagnostic/verification visit with a Smart 7 orientation check and PCT app walkthrough.

Key Concerns: Several concerns warrant follow-up: (1) The ATIS Lamp sensor shown as 'Not Connected' in IMG_8047 is a meaningful discrepancy — if the lamp sensor cannot be found by the gateway, the PCT verification of the BLACK circuit may be unreliable, and this could be the root cause of the original LCM alert rather than a true lamp failure; (2) Photo documentation of all individual lights in the BLACK circuit illuminated is missing, reducing confidence in the no-fault conclusion; (3) The vendor's notes reference 'AMPA' (likely ATIS/PCT activation process) but do not specifically address the ATIS Lamp sensor connectivity issue flagged in the app; (4) The line item categorized under 'Tire pressure inflation and monitoring systems > Sensor - speed' for a PCT sensor activation is a miscategorized charge that does not align with a lighting circuit repair, suggesting possible billing irregularity or system misuse; (5) The Smart 7 connector orientation was checked, which is a positive step, but no documentation confirms it was found correct or corrected.