GETTING TO KNOW YOUR INSTRUMENT PANEL- Page 203

2018 Jeep Wrangler JK Owner Manual

Table of Contents

GETTING TO KNOW YOUR VEHICLE
GETTING TO KNOW YOUR INSTRUMENT PANEL
SAFETY
OCCUPANT RESTRAINT SYSTEMS
STARTING AND OPERATING
SERVICING AND MAINTENANCE
MULTIMEDIA
UCONNECT PHONE — IF EQUIPPED
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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 follow-

ing:
1. Cycle the ignition switch to the ON position, 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 “Malfunction 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 igni-

tion 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 posi-

tion 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.

4

GETTING TO KNOW YOUR INSTRUMENT PANEL

201

Detailed Information for 2018 Jeep Wrangler JK Owner Manual

Lists of information found in 2018 Jeep Wrangler JK Owner Manual - Page 203

  • 1. Cycle the ignition switch to the ON position, 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 “Malfunction 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 igni- tion or start the engine.
  • The MIL will flash for about ten seconds and then return to being fully illuminated until you turn OFF the igni- tion or start the engine.
  • The MIL will not flash at all and will remain fully illuminated until you place the ignition in the off posi- tion or start the engine.

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