Mack Truck Diagnostic Software That Keeps Your Fleet on the Road
Every hour a Mack sits in the yard waiting on a dealer tech is money you're not making. Downtime doesn't negotiate, and neither does a repair bill that includes a service call just to pull fault codes. Fleet managers and independent shops across Canada are bringing that capability in-house — with Jaltest, available through WholeFleet Diagnostics. Dealer-level access to your Mack trucks, on your schedule, without the dealer invoice.
*Financing Available
Introducing Jaltest: The Best Mack Truck Diagnostic Tool
Jaltest is the only commercial vehicle diagnostic software you’ll ever need for Mack Trucks.
Troubleshooting
Troubleshooting Mack truck problems has never been simpler than with Jaltest. The software is intuitive, user-friendly, and fully customizable — no complicated setup process. Whether you're a seasoned technician or new to the industry, Jaltest CV makes diagnosing Mack truck engine issues a breeze!
System & Vehicle Technical Data
With Jaltest CVs powerful diagnostic module, you'll have all the information you need to diagnose and repair Mack trucks quickly and efficiently. Access detailed technical information, images, graphs, and diagrams for each machinery model, and speed up the repair process with ease.
Expert Mode
Unlock the full power of Jaltest’s Mack truck diagnostics with Expert Mode, which enables modifications to be made in different ECUs. With Expert Mode enabled, you can calibrate sensors and actuators, configure operating parameters, and even replace and regenerate DPFs.
Why Jaltest
Why Fleet Managers Choose Jaltest for Mack Diagnostics
Most aftermarket Mack diagnostic tools help you find problems. Jaltest helps you fix them.
When a technician can read active and inactive fault codes, perform forced DPF regens, calibrate sensors, and push parameter changes — all without booking a dealer appointment — downtime decreases and repairs become more efficient than ever.
Jaltest through WholeFleet gives your team the same diagnostic depth a Mack dealer uses. Not a watered-down version of it.
One WholeFleet customer made the switch from JPro to Jaltest and saved over $150,000 a year.
That wasn't from one dramatic repair, it was from eliminating constant dealer callouts, unnecessary downtime, and diagnostic software that simply couldn't keep pace with a mixed fleet. If your operation runs Mack trucks alongside other equipment types, that gap gets wider every year you don't address it.
30 hrs
per month in downtime
$100K+
per year in dealer call-out costs
One Tool. Your Whole Fleet.
This is the part that changes the math for most fleet managers. If you're only running Mack trucks, Jaltest is an excellent mack truck scan tool Canada choice. But if your fleet runs anything beyond Class 8 highway trucks, the value multiplies fast.
Jaltest through WholeFleet covers commercial vehicles, construction equipment, agricultural machinery, marine vessels, and material handling equipment — all within a single diagnostic platform. One kit. One software license. One team trained to use it. If the shop down the road is running a separate tool for every equipment category, they're spending more and getting less. Your Mack trucks don't exist in isolation, and your diagnostic solution shouldn't either.
Full Mack System Coverage
Jaltest's Mack truck diagnostic software covers every major system across the vehicle. Here's what your technicians actually get access to:
Engine Diagnostics
MP7
MP8
MP10
Cummins ISX
And more…
The Mack MP7 diagnostic tool functionality in Jaltest covers live data monitoring, active and historical fault code retrieval, forced regen initiation, and injector calibration. MP8 diagnostic tool coverage follows the same depth — including EGR, DPF, and SCR system diagnostics, which are the systems most likely to keep a truck parked. Cummins ISX engines running in Mack chassis are fully supported as well, so you're not working with gaps in coverage depending on spec.
Transmission
mDRIVE
Eaton Fuller
Allison 3000/4000 Series
And more…
The Yale service password (also called the Yale menu password or service unlock) is one of the most common reasons fleets make expensive dealer callouts. Certain parameter changes, calibrations, and advanced service functions sit behind password-protected menus — and without access, your techs are stuck.
Jaltest provides the access codes and the menu navigation to get into those locked service functions directly. That's not a workaround. That's how the tool is designed.
Body Modules
VECU
BBM
ABS
Instrument Cluster
HVAC
Lighting
Suspension
Diesel Yale forklifts with DPF systems require forced regeneration when passive regen doesn't complete — and the procedure isn't identical across models. The process on a GDP 50MX, for example, differs from the steps on the GDP 60VX. Jaltest walks your technicians through the correct model-specific regen sequence, monitors temperature and pressure values in real time, and confirms completion. No guesswork. No repeated failed attempts that clog the filter further.
If your fleet runs Yale diesel models with particulate filters, this capability alone can justify the tool.
DPF Regeneration and Emissions Control
Watch ECM inputs and outputs in real time — engine RPM, hydraulic pressure, battery voltage, temperature sensors, solenoid states, and more. Jaltest lets you record live data sessions and play them back, which is invaluable for tracking down intermittent faults that don't throw a consistent code.
Diagram it. Record it. Diagnose it. That's how experienced technicians work.
Parameter Setting and Calibration
On Yale diesel models, injector replacement requires coding the new injector's trim values into the ECM. Without this step, you'll get rough running and potential fault codes even after a clean install. Jaltest handles injector coding directly — no separate OEM programmer required.
Parameter calibration functions also cover hydraulic flow settings, load sensor calibration, and drive controller adjustments depending on the model.
Compatible Mack Models
Jaltest supports the full modern Mack lineup:
Mack Anthem — highway applications
Mack Pinnacle (CXU, CHU)
Mack Granite — vocational + construction
Mack LR Series — refuse + low-entry cab
Mack TerraPro — cab-over + specialty
Ongoing updates (3x per year) ensure compatibility with:
New models
Emissions changes
VMRS updates
Why WholeFleet
The WholeFleet Difference
There are plenty of places to buy diagnostic software. Here’s what makes WholeFleet different:
Ownership Model
Financing Available
Canadian Expert Support
VieTech Training
Ownership — Not a Rental
You own your Jaltest outright
No disappearing access if payments stop
Financing options available
Canadian-Based Support
No overseas call centres
Real technicians who understand fleet operations
Faster answers when equipment is down
Training Through VieTech
In-person training across North America
Full online course library
Structured onboarding for your team
Local Representation
Dedicated reps in your region
Real relationships — not ticket systems
Stop Paying for Dealer Diagnostics
Every dealer visit costs you time, money, and control.
Jaltest puts full Mack diagnostic capability back in your shop — where it belongs.
Cut downtime
Eliminate callouts
Diagnose and repair faster
Get the Jaltest Pricing Guide and see what it would save your fleet.
Frequently Asked Questions
What diagnostic software works on Mack trucks?
Jaltest is one of the few aftermarket tools that provides genuine dealer-level diagnostic access for Mack trucks, covering engines, transmissions, body modules, emissions systems, and parameter calibration. OEM options like JPRO and Cummins Insite cover parts of the picture, but Jaltest is the only single-platform solution that also extends to non-Mack equipment in the same fleet. WholeFleet is Canada's authorized Jaltest provider.
Can I diagnose a Mack truck without going to the dealer?
Yes — and most fleet operators who make the switch say they should have done it sooner. Jaltest provides the same depth of access a Mack dealer uses, including forced DPF regenerations, parameter changes, and module-level fault diagnostics. The main difference is that you're doing it in-house, on your own timeline, without paying a dealer callout rate.
Does Jaltest work on Mack MP7 and MP8 engines?
Jaltest fully supports both the MP7 and MP8 engines, including live data, active and inactive fault code retrieval, forced regen, EGR and SCR diagnostics, and injector calibration. The MP10 is also supported. For fleets running Cummins ISX in a Mack chassis, that's covered too. Mack fault codes across all supported engines can be read and cleared directly from the Jaltest interface.
What Mack fault codes can Jaltest read and clear?
Jaltest reads and clears mack fault codes across all major systems — engine, transmission, ABS, body electronics, HVAC, emissions, and more. Both active (current) and inactive (historical) codes are accessible, which is important for diagnosing intermittent faults. Jaltest also provides fault code descriptions and guided diagnostics to help technicians move from code to repair efficiently.
Does Jaltest cover both Mack trucks and other equipment in my fleet?
That's one of Jaltest's strongest advantages. The platform covers commercial vehicles, construction equipment, agricultural machinery, marine vessels, and material handling equipment — all under one license. If your operation runs Macks alongside excavators, forklifts, or combines, Jaltest is the only mack truck diagnostic tool that scales to cover all of it without adding separate tools or subscriptions.
How often is Jaltest software updated for Mack truck coverage?
Jaltest releases three software updates per year, which keeps coverage current with new Mack model releases, emissions regulation changes, and system updates. Annual license renewals give you access to all three updates. WholeFleet manages the renewal process and notifies customers when updates are available.