Stop losing diagnostic work to the dealer.
Run INSITE, DDDL, JPRO, PTT, ESA, CAT ET, or Jaltest against any Class 8 truck in North America — from your shop, with the software you already own. ecuLink is the over-the-air diagnostic cable. Your bay extends to wherever the truck broke down.
Built for independent shops, mobile mechanics, and self-maintaining fleets across North America.
Three workflows. One device.
Most platforms do one of these. We do all three because they're the same hardware problem solved well.
For engineers, OEM dev teams, validation labs.
CAN logging
Capture every J1939 frame on the bus, timestamped and lossless. Pull MDF4 files for analysis in MATLAB, Python, asammdf, or your tool of choice. The blackbox layer underneath everything else.
For shops, fleets, mobile mechanics.
DPF regen & bi-directional commands
Force a parked regen. Reset a derate. Clear an active code. Write parameters. All from your laptop, against the truck wherever it is — no scripts, no rule lists, no waiting on a dealer to schedule it.
For shops with existing diagnostic software.
Remote OEM pass-through
Open INSITE, DDDL, JPRO, PTT, ESA, CAT ET, or Jaltest on your shop laptop. Connect to a truck 800 miles away as if you walked out to the 9-pin. The session is the OEM tool's session. We're just the wire.
The problem
The way remote diagnostics works today is broken.
Step 1
The truck derates 800 miles from home.
SPN 3936. Aftertreatment fault. Driver is stranded on the shoulder of I-40 outside Amarillo. The fleet has remote fault monitoring — so they get an email. The email says “Service Soon — visit nearest dealer.” The nearest dealer is 90 minutes by tow.
Step 2
Your tech tries to reach the truck.
They've got DDDL on the laptop in your shop. But DDDL needs to talk to the 9-pin, and the 9-pin is in Amarillo. The driver doesn't know how to plug in a USB-Link 3. Your telematics platform reads the code, but it can't talk back to the ECU.
Step 3
The workaround is jank.
Driver hotspot. Laptop in the cab. Remote screen-share to your shop. Driver babysits while your tech runs a forced regen over the link. Half the time the connection drops mid-cycle. The other half, the dealer was actually the only option.
With ecuLink
It's a 15-minute call.
ecuLink is already plugged into the truck's 9-pin. Your tech opens DDDL. ecuLink presents itself as an RP1210C VCI. DDDL runs against the actual ECU through the tunnel. Forced regen, derate clear, parameter check. Truck rolls. No tow. No dealer. No driver involvement.
Real pass-through. Not threshold reads. Not rule-based alerts.
Most “remote diagnostics” is a fault-code monitoring dashboard. The telematics device on the truck reads an SPN, sends it to a server, the server compares it against a rules table, and emails a fleet manager. That's monitoring, not diagnostics.
ecuLink presents itself to your laptop as a standard RP1210C or J2534 adapter. The OEM software does not know the difference between an ecuLink tunnel and a USB cable plugged into the truck five feet away. Every diagnostic message, every bi-directional command, every parameter write travels end-to-end between your software and the truck's ECU.
What this means in practice:
- Forced parked regens that actually complete, including the failure modes a tech has to babysit
- DEF dosing tests, NOx sensor calibrations, soot model resets
- ECU reflashing and parameter writes (where the OEM permits)
- Real-time data streaming at the bus rate your tool expects
- Multi-ECU access — engine, transmission, ABS, aftertreatment — in one session
Everything you need for modern fleet management
From real-time diagnostics to predictive maintenance, ecuLink provides the complete solution for modern fleet operators who demand reliability and efficiency.
Encrypted VPN Security
Military-grade WireGuard VPN encryption with a dedicated tunnel for every truck. Keep dealer tools off the public internet while technicians work remotely.
Full J1939 Protocol Support
Designed for modern Class 8 trucks with full J1939 pass-through support. If the OEM software can talk J1939, ecuLink can carry the session.
Works With Your Existing Tools
Bring the OEM applications you already trust—JPRO, Cummins INSITE, Detroit DDDL and more. No new software to learn, just a new way to connect.
Real-Time, Low Latency
Sub-second round-trips optimized for bidirectional CAN traffic, not generic screen sharing. Feels like the truck is in your bay, even when it isn't.
Low Power Design
Engineered to stay online without draining batteries. ecuLink sips power so you can leave it plugged in and always ready for the next session.
Built-in Cellular + GPS
Integrated LTE modem and GPS mean no separate hotspot or in-cab router to manage. Just power the device and it phones home automatically.
Four steps. One install per truck. Lifetime of remote access.
Under the hood, ecuLink creates a secure remote connection to your truck's ECUs: install the device, bring up a cellular WireGuard tunnel, launch your OEM software, and run the same session you'd run at the shop.
Install — plug into the 9-pin
Connect ecuLink to the truck's J1939 diagnostic port. It powers from the vehicle, sits behind the dash, and draws minimal current at idle so it stays online without killing the battery during sit-downs.
Connect — WireGuard tunnel comes up
Cat-1 / LTE-M cellular comes up and a WireGuard tunnel establishes to the ecuLink relay. Unique key per device, dedicated tunnel, no shared infrastructure. Works in 50 states and Canada.
Diagnose — launch your OEM software
Open INSITE, DDDL, JPRO, PTT, ESA, CAT ET, or Jaltest. Select the ecuLink RP1210C or J2534 adapter from the dropdown. From the software's point of view, it's a local VCI.
Fix — run the same session you'd run at the shop
Read codes. Clear codes. Force regens. Reset derates. Write parameters. Reflash where the OEM allows. The driver doesn't need to do anything. The truck doesn't need to come in.
See it run against a real truck.
Book a 15-minute demo and watch a remote diagnostic session over the tunnel — your software, our wire.
Works with the diagnostic software your techs already know.
ecuLink is RP1210C and J2534 compliant. If your software supports either standard, ecuLink works. No new application to learn, no proprietary diagnostic stack, no vendor lock-in on the diagnostic layer.
Cummins INSITE
Detroit DDDL
Noregon JPRO
Volvo PTT
Paccar ESA
CAT ET
Jaltest
Cummins INSITE
Detroit DDDL
Noregon JPRO
Volvo PTT
Paccar ESA
CAT ET
Jaltest
Engine coverage
Cummins ISX, ISB, X15, X12 · Detroit DD13, DD15, DD16 · PACCAR MX-11, MX-13 · Volvo D11, D13 · Mack MP7, MP8 · International A26, MaxxForce · CAT C7, C9, C13, C15, C18 · Allison transmissions · Bendix and Wabco ABS.
Use cases
Built for everyone the OEMs don't want you talking to.
Independent repair shops & mobile mechanics
Reach customer trucks without sending a tech 200 miles. Run the OEM software you already own. Handle work that used to require routing to a dealer. Keep customers in your shop.
Repair shopsSelf-maintaining fleets
Stop sending trucks to dealer service networks for routine regens and derate resets. Your in-house techs already know INSITE and DDDL. Now they can use them from your terminal, not the breakdown lane.
FleetsOEMs, integrators, and R&D teams
CAN logging in the field with full J1939 capture. Remote ECU access during validation. Pass-through for cross-OEM testing without a fleet of dedicated VCIs and laptops.
Talk to usComparison
How ecuLink compares.
The honest version. Cojali is the closest real overlap — we differentiate on an open ecosystem instead of a closed stack.
| Capability | OEM remote (CCD, Virtual Technician) | Cojali Jaltest Telematics | Noregon TripVision | Laptop + driver hotspot | ecuLink |
|---|---|---|---|---|---|
| Real OEM software sessions (INSITE, DDDL, PTT, ESA, CAT ET) | Jaltest only | unreliable | |||
| Multi-OEM coverage on one device | one engine family | reads only | |||
| Bi-directionals (regen, derate reset, parameter writes) | notification only | curated list | curated list | full | |
| Reflashing & deep parameter writes | |||||
| Independent shop & self-maintainer friendly | routes to dealer | ||||
| Always-on cellular, no driver phone | |||||
| Keep using your existing diagnostic software | — |
FAQ
Frequently asked questions
Browse ecuLink
Product, directories, and reference
Everything ecuLink ships in one place — the product surface, our free directories, and the reference content technicians and fleet operators use most.
Product
- Compatibility
Verified diagnostic suites, supported engine families, and protocol-level compatibility.
- Pricing
Hardware and subscription pricing for the ecuLink remote diagnostic gateway.
- FAQ
Frequently asked questions about how ecuLink connects, what it supports, and how it is secured.
- Glossary
Definitions of J1939, RP1210, J2534, CAN bus, UDS, and other heavy-duty diagnostic terms.
Top repair cities
Stop sending trucks to dealers for problems your shop can fix.
Book a 15-minute demo and watch a remote diagnostic session run against a real truck — your software, our tunnel.