
Using the Diagnostic Tool
I/M READINESS TESTING
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If you are sure you want to proceed, use the UP
and DOWN
buttons, as necessary, to highlight YES, then press the
ENTER
button.
If you do not want to proceed, use the UP
and DOWN
buttons, as necessary, to highlight NO, then press the ENTER
button to cancel the erase procedure.
4. If you chose to erase DTCs, a progress
screen displays while the erase function
is in progress.
If the erase was successful, a
confirmation message shows on the
display. Press the POWER/LINK
button to re-link the Tool to
the vehicle.
If the erase was not successful, an
advisory message shows on the
display. Verify that the Diagnostic
Tool is properly connected to the
vehicle’s DLC and that the ignition is
on, then repeat steps 2 and 3,
above.
I/M READINESS TESTING
I/M is an Inspection and Maintenance program legislated by the
Government to meet federal clean-air standards.
The program requires that a vehicle be taken periodically to an
Emissions Station for an "Emissions Test" or "Smog Check,” where the
emissions-related components and systems are inspected and tested
for proper operation. Emissions Tests are generally performed once a
year, or once every two years.
On OBD2 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.
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