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7-2. Maintenance
Emission inspection
and maintenance (I/M)
programs
Some states have vehicle
emission inspection pro-
grams which include OBD
(On Board Diagnostics)
checks. The OBD system
monitors the operation of
the emission control sys-
tem.
If the malfunction indica-
tor lamp comes on
The OBD system determines
that a problem exists some-
where in the emission control
system. Your vehicle may not
pass the I/M test and may need
to be repaired. Contact your
Toyota dealer to service the
vehicle.
Your vehicle may not
pass the I/M test in the fol-
lowing situations:
When the 12-volt battery is
disconnected or discharged
Readiness codes that are set
during ordinary driving are
erased.
Also, depending on your driv-
ing habits, the readiness
codes may not be completely
set.
When the fuel tank cap is
loose
The malfunction indicator
lamp comes on indicating a
temporary malfunction and
your vehicle may not pass the
I/M test.
When the malfunction
indicator lamp still
remains on after several
driving trips
The error code in the OBD sys-
tem will not be cleared unless
the vehicle is driven 40 or more
times.
If your vehicle does not
pass the I/M test
Contact your Toyota dealer to
prepare the vehicle for re-test-
ing.
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