For automotive technicians and savvy DIY mechanics, enhanced scan tools are indispensable. While many users rely on these tools for reading diagnostic trouble codes and examining parameter data, they often overlook a powerful capability: bidirectional control. Bidirectional control is essentially two-way communication between your scan tool and your vehicle’s computer. This advanced functionality allows the OBD2 scanner to not just receive information, but also to send commands to the vehicle to perform specific tests and functions. You might also hear bidirectional controls referred to as actuator tests, functional tests, or system tests – all describing the same powerful diagnostic actions. Reprogramming certain modules can also fall under the umbrella of bidirectional controls in some advanced scanners.
The key difference between a bidirectional scanner and a standard OBD2 scanner lies in this command capability. Regular OBD2 scanners passively read data. A Bidirectional Obd Ii Scanner, however, can actively engage with the vehicle’s systems. This active engagement is crucial for effective troubleshooting. By performing active tests using bidirectional control, a mechanic can pinpoint problems much faster than relying solely on passive data readings. For example, bidirectional controls empower you to directly command components like relay fans or the fuel pump to turn on or off. This direct control allows for isolated testing to quickly identify whether these components are functioning correctly or exhibiting abnormal behavior.
To illustrate the practicality of bidirectional testing, consider these examples of tests supported on a 2016 Chevy Silverado V8 5.3L engine, as verified by our coverage checker. It’s important to note that bidirectional capabilities are not universal across all scan tools. Within the Innova line, our 5610, 5160RS, and tablet models are specifically engineered to support comprehensive bidirectional testing. You can always check our coverage tool to verify compatibility for your specific vehicle: https://www.innova.com/pages/coverage
The video below provides a clear demonstration of the bidirectional capabilities offered by the Innova 5610. In this example, a purge valve diagnosis is being efficiently performed using bidirectional commands.
Another practical application showcasing the active test capabilities of the Innova 5610 bidirectional OBD II scanner is demonstrated below. These active tests are invaluable for quickly and accurately diagnosing complex automotive issues.
