Scan tools can provide a wide range of functions, but one the most useful and common modes is the freeze frame mode. While freeze frame frame data may be for more advanced technicians, it can also be used by a moderately experienced and semi-confident gear heads.
Mode 2: Freeze Frame Data
Essentially, Mode 2 provides a snap shot of the conditions that were present when an error occurred
Mode 2 displays freeze frame data by capturing information at the very point that a fault occurs. The amount of information captured varies from vehicle to vehicle, but the basic concept is the same. When an error occurs the vehicle’s computer will capture as much information as it can. For most people, determining which set of captured (or frozen) information to use can be a challenge, but for mechanics who know where to look, freeze frame data is a keystone function for deciding which repair to make.
Some vehicles may store frozen data for multiple codes, giving you the ability to go back and look at the diagnostics of the last few errors. By cross-referencing frozen data from multiple error codes, a knowledgable mechanic may have the perfect amount of information to accurately diagnose an issue and effectively solve the problem.
Other vehicles, however, may only store freeze frame information for the most recent code. This will provide less information for the mechanic or user, and could potentially mask a different error code that was generated before the most recent. It’s important to note, however, that the amount of frozen data stored is decided by the vehicle’s computer, not the scan tool itself.
Retrieve Freeze Frame Data with Mode 2
Mode 2 is a highly effective and useful mode for all technicians and weekend gear-turners. By providing a snap-shot of the engine conditions at the instant an error was generated, Mode 2 can point a knowledgable mechanic in the right direction.