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Onboard Diagnostic System (OBD II)
Cybersecurity
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related to
the performance of your emissions controls.
Authorized service technicians may need to
access this information to assist with the diag-
nosis and service of your vehicle and emis-
sions system.
WARNING!
ONLY an authorized service technician
should connect equipment to the OBD II
connection port in order to read the VIN,
diagnose, or service your vehicle.
If unauthorized equipment is connected to
the OBD II connection port, such as a
driver-behavior tracking device, it may:
• Be possible that vehicle systems,
including safety related systems, could
be impaired or a loss of vehicle control
could occur that may result in an acci-
dent involving serious injury or death.
• Access, or allow others to access, infor-
mation stored in your vehicle systems,
including personal information.
94
EMISSIONS INSPECTION AND
MAINTENANCE PROGRAMS
In some localities, it may be a legal require-
ment to pass an inspection of your vehicle's
emissions control system. Failure to pass
could prevent vehicle registration.
For states that require an Inspection
and Maintenance (I/M), this check
verifies the "Malfunction Indicator
Light (MIL)" is functioning and is not
on when the engine is running, and that the
OBD II system is ready for testing.
Normally, the OBD II system will be ready. The
OBD II system may not be ready if your vehicle
was recently serviced, recently had a depleted
battery or a battery replacement. If the OBD II
system should be determined not ready for the
I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated
test, which you can use prior to going to the
test station. To check if your vehicle's OBD II
system is ready, you must do the following:
1. Cycle the ignition switch to the ON posi-
tion, but do not crank or start the engine.
NOTE:
If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to
the ON position, you will see the "Malfunc-
tion Indicator Light (MIL)" symbol come on
as part of a normal bulb check.
3. Approximately 15 seconds later, one of
two things will happen:
• The MIL will flash for about 10 seconds
and then return to being fully illumi-
nated until you turn OFF the ignition or
start the engine. This means that your
vehicle's OBD II system is not ready and
you should not proceed to the I/M
station.
• The MIL will not flash at all and will
remain fully illuminated until you place
the ignition in the off position or start
the engine. This means that your
vehicle's OBD II system is ready and you
can proceed to the I/M station.
If your OBD II system is not ready, you should
see an authorized dealer or repair facility. If
your vehicle was recently serviced or had a
battery failure or replacement, you may need
to do nothing more than drive your vehicle as
you normally would in order for your OBD II
system to update. A recheck with the above
test routine may then indicate that the system
is now ready.
Regardless of whether your vehicle's OBD II
system is ready or not, if the MIL is illuminated
during normal vehicle operation you should
have your vehicle serviced before going to the
I/M station. The I/M station can fail your
vehicle because the MIL is on with the engine
running.
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