Heavy Duty Truck Bidirectional Scan Tool, CRP PRO

This is a handheld heavy duty diagnostic scanner built for semi trucks and medium-duty diesel platforms. Coverage is aimed at six truck lines: Cummins and Caterpillar engines, International, Volvo, Isuzu and Hino. It connects through the 9-pin Deutsch diagnostic port with the supplied adapter and gives full-system access to the engine, transmission, ABS and SRS modules, not just a generic code read.

On the transmission side it pulls stored and pending codes, shows live data, and runs the service functions a shop actually needs after repair work: ATF reset, clutch initial position reset, and a gear shifting operation check. When you replace a clutch or an automated manual actuator, the clutch relearn lets the TCU learn the new engagement point instead of sending the truck out with harsh or slipping shifts.

Bidirectional control lets you command components from the tool, which is how you separate a bad actuator from a bad signal. On the engine side it covers forced DPF regeneration, injector coding and calibration, cylinder cut-out tests, DEF (urea) drive tests, oil service reset, idle speed and speed limit adjustment, and more than 40 reset and adaptation services in total, along with SAS reset and brake bleeding.

Typical use: plug into the truck, let the tool auto-identify the vehicle, run a full scan, save the report, then work the fault with live data and actuator tests. After the repair, run the matching reset or relearn and re-scan to confirm the codes stay clear.