I/M Readiness Monitors - Innova 3100 Owner's Manual

Using Code Reader
I/M READINESS TESTING
On OBD 2 systems, the I/M program is enhanced by requiring vehicles
to meet stricter test standards. One of the tests instituted by the Federal
Government is called I/M 240. On I/M 240, the vehicle under test is
driven under different speeds and load conditions on a dynamometer for
240 seconds, while the vehicle's emissions are measured.
Emissions tests vary depending on the geographic or
regional area in which the vehicle is registered. If the vehicle
is registered in a highly urbanized area, the I/M 240 is
probably the type of test required. If the vehicle is registered
in a rural area, the stricter "dynamometer type" test may not
be required.

I/M Readiness Monitors

I/M Readiness shows whether the various emissions-related systems
on the vehicle are operating properly and are ready for Inspection
and Maintenance testing.
State and Federal Governments enacted Regulations, Procedures
and Emission Standards to ensure that all emissions-related
components and systems are continuously or periodically
monitored, tested and diagnosed whenever the vehicle is in
operation. It also requires vehicle manufacturers to automatically
detect and report any problems or faults that may increase the
vehicle's emissions to an unacceptable level.
The vehicle's emissions control system consists of several
components or sub-systems (Oxygen Sensor, Catalytic Converter,
EGR, Fuel System, etc.) that aid in reducing vehicle emissions.
To have an efficient Vehicle Emission Control System, all the
emissions-related components and systems must work correctly
whenever the vehicle is in operation.
To comply with State and Federal Government regulations, vehicle
manufacturers designed a series of special computer programs called
"Monitors" that are programmed into the vehicle's computer. Each of
these Monitors is specifically designed to run tests and diagnostics on
a specific emissions-related component or system (Oxygen Sensor,
Catalytic Converter, EGR Valve, Fuel System, etc.) to ensure their
proper operation. Currently, there are a maximum of eleven Monitors
available for use.
22 OBD 2