What data is indicated by Mode 1 in diagnostic testing?

Mode 1 in diagnostic testing refers to live data, which encompasses real-time vehicle operating parameters and sensor readings. This mode allows technicians to monitor various vehicle systems as they function under actual driving conditions. By capturing this live data, technicians can identify potential issues that may not be evident through static diagnostic trouble codes or other less dynamic data.

Live data can include information such as vehicle speed, engine RPM, throttle position, and data from various sensors like temperature or pressure readings. This immediate feedback is crucial for diagnosing issues while the vehicle is in operation, offering a more comprehensive understanding of how the vehicle performs compared to simply analyzing stored diagnostic trouble codes or freeze frame data, which provide snapshots of specific conditions at the time a fault was detected.