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6-2. Maintenance
Emission inspection and
maintenance (I/M) pro-
grams
Some states have vehicle emission
inspection programs which include
OBD (On Board Diagnostics)
checks. The OBD system monitors
the operation of the emission con-
trol system.
If the malfunction indicator lamp
comes on
The OBD system determines that a
problem exists somewhere in the emis-
sion control system. Your vehicle may
not pass the I/M test and may need to
be repaired. Contact your Lexus
dealer to service the vehicle.
Your vehicle may not pass the
I/M test in the following situa-
tions:
When the battery is disconnected
or discharged
Readiness codes that are set during ordi-
nary driving are erased.
Also, depending on your driving 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 sev-
eral driving trips
The error code in the OBD system 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 Lexus dealer to prepare
the vehicle for re-testing.
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