Emission Inspection And Mainte- Nance (I/M) Programs - Lexus NX 300h 2020 Owner's Manual

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6-2. Maintenance
Items
• Is the tire inflation pres-
sure correct?
• The tires should not be
damaged or excessively
worn.
Tires
• Have the tires been
rotated according to the
maintenance schedule?
• The wheel nuts should
not be loose.
• The wiper blades should
not show any signs of
cracking, splitting, wear,
contamination or defor-
Windshield
mation.
wipers/rear
• The wiper blades should
window wiper
clear the wind-
shield/rear window with-
out streaking or
skipping.
Check points
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 12-volt battery is discon-
nected or discharged
Readiness codes that are set during
ordinary 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.