Frequently Asked Questions

ADAS, or Advanced Driver Assistance Systems, is an integrated suite of electronic safety technologies on heavy-duty diesel trucks. Using cameras, radar and onboard processors, it delivers functions like adaptive cruise control, lane-keeping, blind-spot alerts, collision mitigation braking and stability control, helping reduce accidents, downtime and fuel waste.

Our BG services are preventive maintenance procedures using BG Products chemicals and equipment on heavy-duty diesel trucks. Technicians flush and treat fuel, oil, coolant, EGR, turbo and emission systems, remove carbon deposits, replace depleted additives, and restore proper flow—reducing soot, lowering emissions, improving power and component longevity. For more information on BG products and the specific BG services we offer, click here for BG Product’s site or here for a full breakdown of our services!

Pre-purchase inspections on heavy-duty diesels uncover hidden engine, driveline, frame or emission faults before signing, validating odometer, service history and compliance. Detecting costly repairs upfront guides pricing, negotiating or walking away, preventing unexpected downtime, DOT violations and excessive future operating expenses.

Gas-engine diagnostics focus on spark-ignition components—plugs, coils, O2 sensors, catalytic converters—and lower-pressure EFI fuel systems. Diesel diagnostics prioritize high-pressure common-rail injectors, turbos, EGR/DPF after-treatment, compression and fuel quality checks, using scan tools capable of reading SAE J1939 data and cylinder balance tests for heavy-duty powerplants.

The Ultimate Draft System (UDS) is a self-contained, recirculating pump-test unit for fire apparatus. It simulates drafting from a static source, meeting NFPA 1901/1911 flow and vacuum standards without hydrants or ponds. We use UDS to evaluate pump performance, cavitation, leaks and pressure control safely onsite.

At Kleyn Mobile Repair, it’s important to us to have the tools and technology to quickly and efficiently diagnose and repair your vehicle. Getting your vehicle back on the road, and reducing downtime, are our top goals. We have diagnostic software for CAT, Cummins, Detroit Diesel, Mercedes, MACK, Volvo, International, Hino and Isuzu-brand diesel engines, Allison and Eaton Transmissions products, Bendix, Haldex, and Wabco ABS Systems. Whatever your vehicle, our expert technicians are well-equipped to diagnose your issues, address what’s wrong, and get you back on the road.