Identify the physical diagnostic connector, vehicle year, engine, ECM protocol, and the exact cable specified by the ELD provider before ordering. Do not infer compatibility from connector shape alone; obtain written provider confirmation and complete an engine-on test that verifies VIN, vehicle motion, miles, and engine hours.
Identify the connector without guessing compatibility
| Observed connector | What to record | What the observation does not prove |
|---|---|---|
| 16-pin rectangular connector | Photo, keying, pin layout, vehicle, engine, and VIN | Protocol, power behavior, cable part number, or provider support |
| 6-pin circular connector | Photo, keying, vehicle, engine, VIN, and any existing harness | Engine-data availability or compatibility with an adapter |
| 9-pin circular connector | Photo, keying and color, vehicle, engine, VIN, and existing harness | Communication settings, exact harness, pass-through, or device support |
A connector photo helps identify the cable, but it does not confirm compatibility. Get the provider’s written cable recommendation for the exact vehicle, then verify VIN, motion, miles, engine hours, stable power, and diagnostic-port access during the engine-on installation test.
What to check
| Check | How to verify |
|---|---|
| 1. Record the vehicle year, engine, and connector | Photograph the connector and retain the vehicle VIN, registered model year, engine record, device model, and inspection date. |
| 2. Use the provider-specified cable | Keep the provider's written vehicle-to-cable match, cable part number, device serial, installer, and pre-install condition check. |
| 3. Verify the VIN, miles, and engine hours | Capture the physical VIN and simultaneous ELD readings for VIN, miles, and engine hours; record every mismatch and correction. |
| 4. Create an engine-on driving event | Save the engine-on timestamps, movement event, automatic driving record, expected values, observed values, and acceptance result. |
| 5. Rehearse roadside transfer | Retain the named driver and vehicle, exact device/app version, requested range, method, routing entry, receipt or display, defect, and retest. |
Before you act
Confirm compatibility, included features, pricing, support, installation requirements, and expected setup time for your exact Factor ELD product and plan. Ask the provider to support any reliability claim with evidence. Check Canadian certification separately before using the system in Canada.
Sources and review date
Reviewed August 10, 2026. Check the current rules, device registration, product instructions, and commercial terms before making a decision.
- Federal Motor Carrier Safety Administration — Official ELD technical FAQ covering engine synchronization, VIN, odometer, position, data transfer, events, and device behavior.
- Federal Motor Carrier Safety Administration — Official registered-device list and manufacturer self-certification/non-endorsement language.
- Factor ELD — Current first-party application and manual download options.