check engine CHEVROLET CORVETTE 1993 4.G User Guide

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Features & Controls
Operation of Lights
Although your vehicle’s lighting system
(headlamps, parking lamps,
fog lamps,
side marker lamps and taillamps) meets
all applicable federal lighting
requirements, certain states
and
provinces may apply their own lighting
regulations that may require special
attention before
you operate these
lamps. For exampk, some jurisdictions
may require
that you operate your lower
beam lamps with fog lamps at all times,
or that headlamps be turned on
whenever
you must use your windshield
wipers. In addition, most jurisdictions
prohibit driving solely
with parking
lamps, especially at dawn or dusk It is
recommended that you check with your
own state or provincial highway
authority
for applicable lighting
regulations.
?O
Concealed Headlights
The headlights of your vehicle are
concealed behind protective doors. The
doors open when the headlights are
turned
on.
Do not force the doors open or closed.
To open them manually, turn the
manual hob
on the inside of each
headlight assembly countercloclnvise
until the doors are open.
Daytime Running Lights
(CANADA ONLY)
, The Canadian Federal Government has
decided that Daytime Running Lights
(Dm) are a useful feature, in that DRL
can make your vehicle more visible to
pedestrians and other drivers during
daylight hours.
DRL are required on
new vehicles sold in Canada,
Your
DRL work with a light sensor on
tap of the instrument panel. Don’t
1 come
cover
it
up.
Both front turn. signal lightswil
on in daylight when:
The ignition is on
The headlight switch.is &,-and
The parking brake is released.

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Don't exceed the maximum vehicle
capacity
when loading your Corvette.
For more information on vehicle
capacity and loading, .see the Index
under Loadhtg Your Vehicle.
To prevent damage-or loss of cargo as
you're driving, check now and then to.
make sue the'luggage-Carrie? and cargo
are still securely fasteried.
Cenfer Storage Console
To. open it, push the button on the front
edge to the
rear and lift the.front edge.
Your whed lock key, roof panel or
hardtop wrench
and special wheel nut
socket -are stored here.
You can use the door key to lock and
unlock thecenter console. Remove the
ley immediately after
use to prevent
damage.when the driver-is seated.
Re.ar Storage Compartment
There is a special compartment in the-
flom behind the pa-ssenger seat for use
in-storing tools or valuables. 'To open it,
push the. button -and lift the lid. You
can use the dour key t.0 lo-ck this
compartment.
The
top tray may.be removed for more
storage spa-ce.

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Gages can indicate when there may be
or 3s a problem with one of your
vehicle’s functions.. Often gages and
,warning lights work together to let you
how when theze’s
a, problem with your
vehicle,
When
one of the warning lights comes
on and stays on when youwe driving,
or when one of-the gages shows there
may be
a problem, check the section
that tells you what to de about itr Please
follow
the manuaI’s advice. Waiting to
.do repairs can be costly-and even
dangerous. So please get ta how your
warning lights
and gages. They’wa big
help.
Your vehicle also has a Driver Infomation,
Center that
works .along with the
warning lights
and gages. See the Index
under Driver Infomzatlcrn Center.
Gage Markings
The analog .gages pgovide a quick visual
reference to the actual measurements
of
these gages. However, they &e non-
linear, which means that the middle
hash marks on the analog gages do not
represent median
measurements for
these .gage
For accurate gage measurements refer
to the
GAUGES button .on the Trip
Mo,nitor (see the
Index under Trip
Monitor).
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.Driving. your vehicle with low oil
pressure can cause extensive engine
-damage.
II D4
This gage shows your oil temperature in
degrees Fahrenheit +
It's normal fop the oil temperature to
vary, depending on the type of driving
you do and the weather conditions.. If
"you drive for a long time, such as on a
trip, the gage will show a higher reading-
than
if you had driven for only a short
time. And if it's hot -outside, the-reading
will be higher than if it were cold outside.
If your oil temperature approaches the
shaded area and stays there for some
time; your oil temperature is too high.
Check
the engine oil levei and bring
your vehicle in for service.
You should
also check the engine coolant temperature.
If your engine is to.0 hot, see the.Index
under Engine Cooling System.
For accurate gage measurements refer
to the GAUGES button on the Trip
Monitor (see the
Index under Trip
Monitor).

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LT1 Engine: Engine' Oil temperature
Gage
"LT5 Engiie: Engine Oil Temperature,
Gage
Voltmeter
Your chafging system gage will show
the rate of chafge-.when the engine is
running.
(When the engine is not
running, the- display measures the
voltage-
output of your battery.)
The reading will change sts the rate of
charge changes (with .engine speed,
etc.), but readings between the shaded
are.as indkate the noma1 operating.
range. Readings in either shaded area
indicate-a passible-problem with ydur
charging
system. The CHECK
GAUGES light will come on du-g
both high and.10-w battery voltages. See
your dealer
to have your system
sewiced immediately.
For accurate gage measurements refer
to the. GAUGES button on the Trip
Monitor
(se.e -the In&x under Trip
Monitor).

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Check Gauges Light
This light will come on briefly whien y6u
are starting the engine. I€ the light
comes on and stays on while you are
driving, check your various gages to see
if they are in the warning zones.
If this light comes on and stays on with
the engine running, this indicates one of
the following conditions:
high oil temperature
high coolant temperattiE’
high battery voltage
low battery voltage
IOW oil pressure
or low fuel level (zero bars showing).
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Security Light
The SECURITY light reminds you to
arm your theft deterrent system by
flashing when the ignition is in Lock-
and the doors are opened. It keeps
flashing until
you arm the theft
deterrent system
by locking the doors
using the power door lock button or the
Passive Keyless Entry system.
Once the system
is armed, the light
stops flashing
and remains lit. When the
last
door is shut, the light will stay on
for two seconds and then
go out. It will
also remain lit if the hatch is left open
but the theft deterrent system is still
armed.
If you close the doors and the hatch
without arming the system, the
SECURITY light goes out immediately.
When you re-enter the vehicle, the light
w.ill flash until
you close the door or the
hatch,
or turn the ignition .on. See the
Index under PASS-Key TM and Universal
.Theft Deterrent.

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1 Engine ~e. oni it or
The Engine Oil Life Monitor us&&
engine oil temperature and engine
revolutions
to 'determine when the oil is
nearly worn out.
There ,is a CHANGE OIL light on the
left side ,of the- instrument cluster. It
comes
on for a fkw seconds as a bulb
check when you sta-rtyour vehicle. It
mrnes on and stays on when it is time
to change yuur oil.
The CHANGE OIL light is only a
reminder.
You should change, your oil at
$he intervals recommended in your
Maintersance- Schedule menif the
CHANGE OIL 1-ight hasn't come on.
Resetting the Engine Oil Life
Monitor:
1, %LEU the key to the Run pasition, but
don't
start the engine.
2. Press the ENG MET button .on the
Trip Monitor. Within five seconds,
press the ENG MET button again.
3. Within five seconds of step 2, press
and hold the GAUGES button on
the Trip Monitor. The CHANGE
OIL light d flash.
4..Hold the GAUGES button until the.
CHANGE OIL light stops flashing
and goes out; This should take about
ten seconds. When the light goes out,
the Engine Oil Life Monitor is reset.
If it doesn't reset, tum the- ignition to
Of€ and repeat the procedure.

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Low 7ire Pressure Warning Light
(OPTION)
The LTPWS has a sensor 'on each road
wheel that transmits-to
a receiver on the
instrument panel.
The system operates
on a radio frequency subject
to Federal
Communications Cbmission
(FCC)
Ruks.
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following
two conditions: (1) This
device may not cause harmful
interhence,
and (2) This device.must
accept
any interhence received,
including interference that-may cause
undesired operation.
Changes or modifications to- this system
by other than an authorized service
facility could void authorization to use
this equipment.
The Low Tre Pressure Warning System
(LTPWS) monitors the
air pressure in
each road tire (except the spare tire)
while the car is being driven. The
LTFWS will not warn the driver if a tire
is
already flat before the vehicle is started.
This light comes on whenever a tire
pressure
goes below 25 psi (I 75 Ha) in
any road tire while your Corvette is being
driven.
You must drive the car faster than
25 mph (40 km/h) and for more than 2
miles (4 h) -for the system to work
properly.
The Low Tire Pressure Warming
Light also warns you if any of the
system's comp.onents-are not working
properly. The
LOW TIRE PRESSURE
light will remain on until the ignition is
turned
off. This will also reset the system.
When the LOW TIRE PRESSURE
fight comes on, check the tire -pressure
.in
all four road tires as soon as you can,
using the
tire pre:ssure gage.provided in
thesenter console. Adjust the tire
pressure as needed to those shown on
the Tire-Loading Information label
10-cated
on the driver's door, The LOW
TIRE PRESSURE light may come on
if your vehicle is close to aaother
vehicle that has
a Low Tire Pressure
Warning System
and has a tire-with low
pressure.
The LTPWS sensor is directly opposite
the valve stem on the tire. Take extreme
care when servicing or
having your tires
serviced. The sensors may not work
properly
if damaged.
If you need to take the tire off the wheel,
do it at a
90" angle from the valve stem.
Removing the tire from the wheel at any
.. 1

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point more than 90" from the valve stem
may damage the LTPWS sensors..
If this light stays on after the tire pressure
is properly adjusted, see your dealer.
I14
Service LTPWS Light (OPTION)
The SERVICE LTPWS light comes on
whenever a Low Tire PressureWrtming
System component is not working
properly. It
may also come on during
law speed (less than 25 rnph,
40 Idh) or. stop-and-go driving, even
though tire pressure is above 25 psi
(175 kPa-) in each tire. This light turns
o€f when the electronic receiver gets a
coded signal
from each sensor..
.Check the system
by turning the ignition
off, then on again. If'lhe system is
worling, the light should come on-and
then go out. See your dealer if the light
remains on
or doesn'.t come on .at ail.
If your vehicle is operated for three
consecutive half-hour time periods
without being moved,
the .. SERVICE
LTPWS light will come on. Each time
the vehicle
is started thereafter, the light
will come mand stay on until the vehicle.
is moved. When the vehicle
is moved, the-
SERVICE LTPWS light will go out.
This is a normal condition, and does
not indicate
anything-wrong with the
system.
(If you would Iilre to permanently
clear the
SERVICE LTPWS light from
your Driver Information Center, see
your dealer for assistance.)
The
SERVICE LTPWS light will also
corne. on if.the vehicle is operated for
three consecutive half-hour periods-
when
,dl four tires- have been replaced
with
snow tires or aftermarket tires, or
if all four LT-PWS sensors. are damaged
or missing. The SERVICE LTPWS
light will stay o.n until the system
receives
a sensor signal. I€ the light
'comes on and stays on even when the
vehicle is driven, this may .indicate
a
problem. See your dealer for assistance.
To prevent damage to the sensor, follow
the instructions
for mounting and
dismounting tires in
the 1993 Corvette,
Service Manua.1.
LTPWS can warn you of a Idw tire
situation-or
a system problem, but it
-does not substitute .foT.norrnal tire
maintenance. See the
Itzdex under Tires;

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/iflatable Restraint light
The. INFL REST (Inflatable. Re'str'aint)
light
Is part ofthe Supplemental
Inflatable
Restraint system on your
vehicle. This light will flash -seven t,o
hine ti-mes when you turn the ignition
key
to Ruil. If: thklight comes oh.when
you are driving, fails to glow when you
turn the key to Run, or stays on after
turning the key to Run, there may be a
problem with the system.
.ASR System. Warning and
lndicator Lights
The following three 1ights.m your
Driver Information Center tell you
abo.ut your .ASR (Ac.ce1eratio.n Slip
Regulation),
ASR Acfive Light
This indicator on the Driver- Information
Center will
come on when you turn the
ignition
on and remain on for a few
seconds during
a system check. It also
indicates when the ASR system has
been activated. See the Index under
Accel@rution Slip Regulation. (ASR)
System.