LAUNCH TECH X-431 Torque User Manual

Also see for X-431 Torque: Quick start guide

LAUNCH TECH X-431 Torque User Manual Manual pdf 69 page image

X-431 Torque User Manual617 I/M ReadinessAn important part of a vehicle’s OBD II system is the Readiness Monitors, whichare indicators used to find out if all of the emissions components have beenevaluated by the OBD II system. They are running periodic tests on specificsystems and components to ensure that they are performing within allowablelimits.Currently, there are eleven OBD II Readiness Monitors (or I/M Monitors) definedby the U.S. Environmental Protection Agency (EPA). Not all monitors aresupported in every vehicles and the exact number of monitors in any vehicledepends on the motor vehicle manufacturer’s emissions control strategy.Continuous Monitors -- Some of the vehicle components or systems arecontinuously tested by the vehicle’s OBD II system, while others are tested onlyunder specific vehicle operating conditions. The continuously monitoredcomponents listed below are always ready:1）Misfire2）Fuel System3）Comprehensive Components (CCM)Once the vehicle is running, the OBD II system is continuously checking theabove components, monitoring key engine sensors, watching for engine misfire,and monitoring fuel demands.Non-Continuous Monitors -- Unlike the continuous monitors, many emissionsand engine system components require the vehicle to be operated underspecific conditions before the monitor is ready. These monitors are termednon-continuous monitors and are listed below:1) EGR System2) O2 Sensors3) Catalyst4) Evaporative System5) O2 Sensor Heater6) Secondary air Injection7) Heated Catalyst8) A/C systemI/M refers to Inspection and Maintenance that is legislated by the Government to