EMISSIONS INSPECTION AND MAINTENANCE PROGRAMS- Page 85

2018 Jeep Wrangler JL User Guide

Table of Contents

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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 ve-
hicle control could occur that may
result in an accident involving seri-
ous injury or death.

• Access, or allow others to access,

information stored in your vehicle
systems, including personal infor-
mation.

For further information, refer to “Cybersecu-
rity” in “Multimedia”.

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 Inspec-
tion 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
dead 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 “Mal-
function 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 ten seconds

and then return to being fully illuminated
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 igni-
tion in the off position or start the engine.
This means that your vehicle's OBD II sys-
tem is

ready

and you can proceed to the I/M

station.

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Detailed Information for 2018 Jeep Wrangler JL User Guide

Lists of information found in 2018 Jeep Wrangler JL User Guide - Page 85

  • 1. Cycle the ignition switch to the ON posi- tion, but do not crank or start the engine.
  • 2. As soon as you cycle the ignition switch to the ON position, you will see the “Mal- function 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 ten seconds and then return to being fully illuminated until you turn OFF the ignition or start the engine.
  • 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 ve- hicle control could occur that may result in an accident involving seri- ous injury or death.
  • Access, or allow others to access, information stored in your vehicle systems, including personal infor- mation.
  • The MIL will flash for about ten seconds and then return to being fully illuminated until you turn OFF the ignition or start the engine.
  • The MIL will not flash at all and will remain fully illuminated until you place the igni- tion in the off position or start the engine.

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