Previously, the OBD2 standard (SAE J1979) categorized each defined monitor as either one. Each emission monitor can have different requirements for the conditions. Some require two drive cycles because of the need for a cool down and warm up periods between. Some monitors require that the car follows a predefined drive cycle routine. The conditions necessary to run the non-continuous self-diagnostic tests vary. The non-continuous monitors need certain conditions to be met before a test can be completed. Continuous monitors are being constantly tested and evaluated while the engine is running. Continuous monitors are different in design from the non-continuous ones.
There are two different types of readiness monitors: continuous and non-continuous. The output of readiness monitors tell you whether the car’s computer has completed the tests successfully.
These tests are so called readiness monitors. Like the name indicates, they observe the performance of car’s emission related systems.Ĭars may perform up to 11 system tests or routines. The monitors are also known as Emissions Monitors. The purpose of readiness monitors is to self-test the car’s emission control systems. This tutorial will explain in detail what the readiness monitors are. They provide insight to the car’s self-diagnostics. OBD2 Readiness Monitors are simple yet powerful self check routines.
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