On-vehicle real-time analysis prevents breakdowns — and until now, that meant expensive subscriptions, cloud dependencies, or a laptop in the shop.
Active fault codes, sub-system failure trends, and thermal anomalies appear in the data long before a truck goes down. Fleet Witness surfaces them in plain English — before the driver calls in.
A scored, categorized post-trip diagnostic report is generated automatically after every run — including fuel efficiency, driver behavior, and engine health. No driver or technician input is required.
Fleet Witness is hardware and software you own. Buy it once, run it forever. Your data stays on your equipment, not on third-party SaaS servers.
The Enterprise Kit with Terminal Connectivity runs roughly $685 per truck — comparable to one year of a telematics subscription. Except you never pay again.
Savings: 100% of subscription cost after first yearNo cloud logins. No complex setup. Fleet Witness connects directly to your vehicle's J1939 backbone and gets to work immediately.
Connect two wires to the J1939 CAN bus. No ECM reprogramming. No dealer visit. Works on any diesel, CNG, propane, or hydrogen vehicle.
Any Vehicle → Any Fuel10Hz real-time sampling of 50+ J1939 parameters. Fault codes, fuel economy, driver behavior, temperatures, pressures — all on the dash display.
Live DashboardAt trip end, a complete scored diagnostic report is ready. Retrieve it via WiFi from any browser — or let the Terminal harvest it automatically when the truck returns to base.
No Driver Input RequiredBuilt for the technician who needs answers, and the fleet manager who needs accountability.
Decodes DM1 fault codes with plain-English SPN descriptions. Active DTCs display on-screen with lamp indicators. Clear faults directly from the gauge — no scan tool needed.
Multi-dimensional scoring: Fuel Efficiency, Driver Behavior, Engine Health, and Maintenance Needs — generated automatically at the end of every trip.
Composite 0–100 score based on hard braking, acceleration, cornering, speed compliance, and idle time. Onboard G-force event detection with configurable thresholds.
When something happens, you have the data. Driver presses CAPTURE and the gauge freezes a 20-second window of all before/after vehicle data at 10Hz — saved as timestamped JSON.
Built-in secure web server. Connect any phone or tablet, no app to install. Live data, fault history, settings, and firmware updates — all from a browser.
Freeze-frame of critical engine parameters captured at trip end. Speed, throttle, coolant temp, oil pressure, battery voltage, boost — everything your tech needs before opening the hood.
Every trip generates a comprehensive diagnostic report — automatically, with no driver input. It's a scored, categorized, actionable maintenance document that tells your service team exactly what needs attention before the next trip.
See Full Sample ReportFleet Witness is fuel-agnostic at its core. Optional software modules unlock specialized monitoring for your specific operation — available on any Fleet Witness unit, with or without Terminal Connectivity.
The Fleet Witness Terminal sits in your maintenance bay or yard office. When an equipped vehicle pulls within range, every trip log, diagnostic code, and driver score downloads automatically — no one touches anything.
Requires Terminal Connectivity upgrade. No cloud. No subscription. AES-256 encrypted local storage.
Detects Fleet Witness vehicles automatically when in range
AES-256 encrypted local storage — your data never leaves your facility
Set it on the stand, always ready — no cables to manage
JSON, HTML, and PDF formats for your existing workflows