What is an Active Test/Bidirectional Control Scanner?

In automobile after-sales repair and service, the most common one is the OBD-II scanner, which is used to scan and diagnose automobile faults. Active testing/bidirectional control is also one of the important conditions for judging the performance of the scanner.

Bi-directional control is an important feature of the Enhanced Scan Tool that describes sending and receiving information from one device to another. Vehicle engineers who design the computer control system program it so that the scan tool can request information or command the module to perform specific tests and functions. Some manufacturers refer to bidirectional control as functional testing, actuator testing, inspection testing, system testing, etc. Reinitialization and reprogramming can also be included in bidirectional control lists.

Enhanced bidirectional control scanners can often perform fault diagnosis, ECU Coding, data recording and analysis, vehicle TPMS services and anti-theft services.

The scan tool is the primary bi-directional control device and can actually be called a bi-directional tool because it sends information to and receives information from the vehicle control module. For example, in the case of OBD II Generic Information Mode 1 (Related to Data Parameters), the scan tool user initiates an information request to the Powertrain Control Module (PCM), which responds by sending information back to the system. Scan tool for display. Most enhanced scan tools are also able to drive relays, injectors and coils, perform system testing, and more.

Autel entry-level bi-directional  control scanner MX808S

Autel Maxicheck MX808S is a full-featured OBD2 diagnostic scanner, as an upgrade version of Autel MK808/MX808, Autel MX808S Integrates full Systems Diagnostics, Active tests, 36+ Special Functions, 10000+ brands coverage, Data Logging, and Remote Assist into this 7” diagnostic tablet which has become the

Autel MaxiCOM MK808BT PRO automotive diagnostic tool , as an advanced version of Autel MX808/MK808BT, based on Android OS and 7.0 inch touchscreen, has the ability to quickly read and clear DTCs for all available modules of the majority of the makes and models on the market. As a pro-grade automotive diagnostic scanner, MK808BT PRO scan tool also provides you with superior special functions, including Oil Reset, EPB(Electronic Parking Brake), SAS (Steering Angle Sensor), BMS (Battery Management System), ABS Brake Bleed and DPF (Diesel Particulate Filter) Regeneration. new go-to tool for professionals!