LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM alerted on the RED (Brake) circuit for trailer V507241 at site DET6. Based on the available evidence, confidence in a true lighting defect is moderate (72%). The vendor's conclusion was that all lights were operational, resulting in a no-fault-found outcome. However, the lack of proper photographic documentation of the brake light circuit specifically — and the absence of a nosebox photo — leaves the sensor verdict somewhat ambiguous. The PCT app was used and TPMS was verified successfully, but lighting circuit confirmation is incomplete.

Photo Evidence: The submitted photos do not include any images of illuminated brake lights or the trailer's nosebox wiring, which are explicitly required by the LCM troubleshooting procedure. What is provided includes: (1) a wide-angle shot between two trailers at a dock with a Goodyear service truck visible, suggesting an on-site service call; (2) two close-up images of a heavily corroded wheel hub area with a brass brake/tire inflation fitting and white tubing — consistent with a TPMS-related component, showing significant rust and corrosion around the hub aperture; (3) multiple PCT TechAssist app screenshots showing TPMS sensor details for V507241 — notably Photo 9 captured at 4:22 PM shows RO1 (Right Outer, Axle 1) at only 58 PSI in red/alert status, while Photos 6 and 10 (captured at 4:32 PM) show all sensors at normal pressures (97–106 PSI) after inflation; (4) a verified TPMS confirmation screen showing successful PCT verification; (5) the trailer QR code/VIN sticker confirming asset V507241 (VIN: 3H3V532CXKR955197); and (6) the rear license plate showing Oregon plate HV 43997. No photos of brake lights illuminated, no nosebox interior, and no lighting circuit documentation were provided.

Vendor Compliance: The vendor did not comply with the LCM troubleshooting procedure as defined. While the PCT TechAssist app was used and TPMS was verified, the procedure specifically requires: photos of each light illuminated, a clear nosebox wiring photo, and a TechAssist app screenshot showing green 'Verified' beside each of the 5 circuits. None of these lighting-specific requirements were met. The vendor notes are brief and generic ('FOUND ALL LIGHTS ARE OPERATIONAL NO ISSUESS ON TRAILER') with no specific reference to testing the brake circuit, inspecting connectors, or reviewing the nosebox. This represents a significant documentation gap and non-compliant response to the LCM work order.

Repair Summary: No repairs were made to the lighting system. No parts or labor line items were submitted. The only identifiable service performed was TPMS inflation — RO1 was found critically low at 58 PSI and was inflated to 100 PSI, with PCT verification completed successfully. While this TPMS correction is legitimate and documented, it is unrelated to the LCM RED (Brake) circuit alert that generated this work order. The alerting circuit was not addressed, repaired, or formally cleared with proper documentation.

Key Concerns: Several concerns are flagged: (1) The vendor appears to have focused primarily on the TPMS low-pressure condition (RO1 at 58 PSI) rather than the LCM brake circuit alert, suggesting possible misallocation of effort or misunderstanding of the work order scope. (2) No lighting photos were taken — this is a direct violation of the troubleshooting procedure and makes it impossible to confirm the no-fault-found conclusion. (3) The hub corrosion visible in Photos 2 and 4 is significant and may warrant further inspection, though it is not directly tied to the brake light circuit. (4) The Gateway Details screen (Photo 5) shows the CargoV sensor as 'Not Connected / Unverified,' which is a separate active sensor issue that may require follow-up. (5) The LCM brake circuit alert remains unconfirmed as cleared, as no circuit-level PCT verification screenshot for lighting was provided. Overall, this work order reflects incomplete execution of the required LCM protocol.