How to Remove the 90 km/h Speed Limit on Shacman Trucks?
3 Answers
This situation can be manually resolved, as some more advanced trucks are equipped with a speed-limiting function. The owner can set or cancel the speed limit on the steering wheel. In this case, the owner cannot manually cancel the ECU electronic speed limit because the program has been written into the ECU system, unless it is reprogrammed using specialized computer software. The manufacturer sets the speed limit to ensure safety. If a truck exceeds the speed limit when fully loaded, the braking system may not be able to stop the vehicle in an emergency.
I've been into cars for years and have researched quite a bit about removing the 90 km/h speed limiter. Speed limiters on trucks like the Sinotruk are typically set for safety, with mandatory retention to prevent high-speed accidents. To remove it, you need to adjust the vehicle's Electronic Control Unit (ECU) by connecting an OBD diagnostic tool to the onboard system, locating the speed limit parameter, and then modifying the value. I've tried doing it myself, but the risks are significant: first, the equipment is hard to come by, and software compatibility issues can easily lead to errors; second, it might trigger fault codes or damage the engine; third, illegal removal violates traffic regulations and can affect insurance claims. I recommend not taking the risk yourself—instead, have a professional auto repair shop handle it. They have standard equipment to do it safely and will remind you to maintain a reasonable speed for safety first. This way, you solve the problem without endangering yourself or others.
As an experienced mechanic, I've handled similar requests. Removing the 90 km/h speed limiter primarily involves modifying ECU parameters, requiring professional tools like an X-431 diagnostic device to connect to the vehicle's OBD port and access the system menu to disable the speed limiting function. Each vehicle model has different procedures and complex operations, with improper handling potentially causing error codes or multi-system failures. For heavy trucks like Sinotruk, speed limiters are an essential safety mechanism - removing them significantly increases the risk of acceleration loss of control. I never recommend users attempt this themselves; they should visit authorized service centers where technicians can ensure compliance while inspecting the vehicle's overall circuitry to prevent subsequent issues. Safe driving should always be the top priority.
