Vehicle Diagnostic Trouble Codes (DTCs) Explained

What is a freeze frame and how is it related to Diagnostic Trouble Codes (DTCs)?

A freeze frame is stored when a type ________ DTC is set. a) Continuous b) Noncontinuous c) Pending d) Historical

Answer:

A freeze frame is stored for a type b) Non-continuous DTC.

A freeze frame is a snapshot of the engine's condition at the time a fault is detected and is stored when a type non-continuous Diagnostic Trouble Code (DTC) is set. Non-continuous DTCs are not monitored at all times by the vehicle's On-Board Diagnostics (OBD) system, unlike continuous DTCs that are constantly checking for issues.

When a non-continuous fault occurs, it must meet specific criteria before the DTC is set and the freeze frame data is captured. This data provides valuable information for technicians to troubleshoot the issue effectively.

Duration is considered as quantitative continuous data because it is measured over a continuous range. The freeze frame helps in understanding the conditions under which the fault occurred and aids in diagnosing and resolving the problem efficiently.