service CHEVROLET CORVETTE 1998 5.G User Guide

Downloaded from www.Manualslib.com manuals search engine Malfunction Indicator Lamp (Check Engine Light)
CHECK
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
This system is called OBD
I1 (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions
are at acceptable levels for the life
of the vehicle, helping to produce a cleaner
environment. The
CHECK ENGINE light comes on to
indicate that there is a problem and service is required.
Malfunctions often will be indicated by the system
before any problem is apparent. This may prevent more
serious damage to your vehicle. This system is also
designed to assist your service technician in correctly
diagnosing any malfunction.
NOTICE:
If you keep driving your vehicle with this light
on, after a while, your emission controls may not
work as well, your fuel economy may not be as
good and your engine may not run as smoothly.
This could lead
to costly repairs that may not be
covered by your warranty.
This light should come on, as a check to show you it is
working, when the ignition is on and the engine is not
running. If the light doesn’t come on, have it repaired.
This light will also come on during a malfunction in one
of two ways:
0 Light Flashing -- A misfire condition has been
detected.
A misfire increases vehicle emissions and
may damage the emission control system on your
vehicle. Dealer or qualified service center diagnosis
and service may be required.
malfunction has been detected on your vehicle.
Dealer or qualified service center diagnosis and
service may be required.
Light On Steady -- An emission control system

Downloaded from www.Manualslib.com manuals search engine If the Light Is Flashing
The following may prevent more serious damage to
your vehicle:
Reducing vehicle speed.
Avoiding hard accelerations.
Avoiding steep uphill’grades.
If the light stops flashing and remains on steady, see
“If
the Light Is On Steady” following.
If the light continues to flash, when it is safe to do
so,
stop the vehicle. Find a safe place to park your vehicle.
Turn the key off, wait at least
10 seconds and restart the
engine. If the light remains on steady, see “If the Light
Is On Steady” following. If the light is still flashing,
follow the previous steps, and drive the vehicle to your
dealer or qualified service center for service.
If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
Did you just drive through a deep puddle of water?
If
so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out. A few driving trips should turn the light off.
Have you recently changed brands
of fuel?
If so, be sure to fuel your vehicle with quality fuel (see
“Fuel”
in the Index). Poor fuel quality will cause your
engine not to run as efficiently as designed.
You may
notice
this as stalling after start-up, stalling when you put
the vehicle into gear, misfiring, hesitation on acceleration or
stumbling on acceleration. (These conditions may go
away once the engine is warmed up.)
This will be detected
by the system and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at least one
full tank of the proper fuel to turn the light
off.
If none of the above steps have made the light turn off,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper test equipment and
diagnostic tools to fix any mechanical or electrical
problems that may have developed.

Downloaded from www.Manualslib.com manuals search engine Engine Oil Pressure Gage
The engine oil pressure
gage shows the engine oil
pressure in psi (pounds per
square inch) or kPa
(kilopascals) when the
engine is running.
Oil pressure should be
20 to 80 psi (140 to 550 Wa).
(In certain situations such as long, extended idles on hot
days, it could read as low as
6 psi (40 kPa) and still be
considered normal.) It may vary with engine speed,
outside temperature and oil viscosity, but readings above
the shaded area show the normal operating range.
Readings in the shaded area tell you that the engine is
low on oil, or that you might have some other oil
problem. See “Engine Oil” in the Index. The
engine oil pressure can also be displayed using the
GAGES button on the Driver Information Center (DIC).
See “Driver Information Center” in the Index.
A CAUTION:
Don’t keep driving if the oil pressure is low. If
you do, your engine can become so hot that it
catches fire. You or others could be burned.
Check your oil as soon as possible and have your
vehicle serviced.
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Downloaded from www.Manualslib.com manuals search engine DIC Controls and Displays
Turn on the system by turning the ignition to ON. When
you turn on the ignition, the DIC will be in the mode last
displayed when the engine was turned
off. Each DIC
button allows you to scroll through a menu. A blank
page ends each menu.
If a problem is detected, a diagnostic message will
appear on the display. Press RESET to acknowledge any
current warning or service messages. The following
pages will show the messages you can see on the DIC
display by pressing the DIC buttons.
1 FUEL
The FUEL button displays average fuel economy and
instantaneous fuel economy calculated for your specific
driving conditions and range.
I AVERAGE 27.0 MPG
INST. 20.4 MPG
RANGE
220 MI
=
Press the FUEL button to display average fuel economy,
such as:
AVERAGE 20.1 MPG or
0 AVERAGE 5.3 WlOO km
The average fuel economy is viewed as a long-term
approximation of your overall driving conditions. If you
press RESET in this mode while you’re driving, the
system will begin figuring fuel economy from that point
in time.

Downloaded from www.Manualslib.com manuals search engine ABS ACTIVE (Anti-Lock Brake System Active) - :
When your anti-lock system is adjusting brake pressure
to help avoid a braking skid, the ABS ACTIVE message
will be displayed.
Slippery road conditions may exist if this message is
displayed,
so adjust your driving accordingly. The
message will stay on for a few seconds after the system
stops adjusting brake pressure.
SERVICE ABS (Anti-Lock Brake System) - : If the
SERVICE ABS message is displayed when you
are
driving, stop as soon as possible and turn the ignition
off. Then start the engine again to reset the system. If
the message stays on, or comes back on again while you
are driving, your vehicle is in need of service. If the
regular brake system warning light isn’t on, you still
have brakes, but don’t have anti-lock brakes. If the
regular brake system light is also on, you don’t have
anti-lock brakes and there is a problem with your
brakes.
See “Brake System Warning Light” earlier in
this section.
If the SERVICE ABS message is being displayed, your
traction control system and the optional active handling system will also be disabled. The driver information
center will scroll three messages SERVICE ABS,
SERVICE TRACTION SYS. and SERVICE ACTIVE
HNDLG and the instrument cluster car icon will be illuminated.
The driver can acknowledge these messages
by pressing the reset button three times. When the
service message is displayed the computer controlled
systems will not assist the driver and you should have
the system repaired as soon as possible. Adjust your
driving accordingly.
SERVICE COLUMN LOCK: The system that
controls the locking and unlocking of the steering
column may not work properly. Have the vehicle towed
to a dealer for service.
LOW OIL PRESSURE: You will hear four chimes and
the CHECK GAGES telltale will come on when this
message is displayed.
To acknowledge the warning,
press the RESET button. After you press the
RESET
button, a message will be displayed and you will hear a
chime every minute until the vehicle is serviced.
If you
do not press RESET, the message will remain on the
digital display until the vehicle is serviced.
Low oil pressure may be the result of a combination of
low oil level and abrupt changes in the vehicle’s
direction. When this warning
is displayed, you should
not operate the engine at high
RPM or make fast abrupt
moves. When convenient, you should check the oil
level. See “Engine Oil” in the Index.

Downloaded from www.Manualslib.com manuals search engine LOW OIL LEVEL: Press RESET to acknowledge that
you have read the message and to remove it from the
display. The message will reappear every
10 minutes
until this condition changes.
You will hear two chimes when this message is
displayed. If this message appears after starting your
engine, your engine oil level may be too low. You may
need to add oil. See “Engine Overheating” in the Index.
REDUCED ENGINE POWER: You will hear chimes
continuously when this message is displayed. To
acknowledge that you have read the message and to
remove it from the display, press RESET. The message
will reappear every
15 seconds until this
condition changes.
If the Driver Information Center displays the
REDUCED ENGINE POWER message and the
CHECK ENGINE light comes on, a noticeable
reduction in the vehicle’s performance may occur.
If the
REDUCED ENGINE POWER message is displayed but
there is no reduction
in performance, proceed to your
destination. The performance may be reduced the next
time the vehicle is driven. The
vehicle may be driven at a reduced speed while the
REDUCED ENGINE POWER message is displayed,
but acceleration and speed may be reduced. Anytime the
CHECK ENGINE light stays on, the vehicle should be
taken to an authorized Chevrolet dealer as soon as
possible for diagnosis and repair.
Also, refer to “Malfunction Indicator Lamp” (Check
Engine Light) in the Index.
If the REDUCED ENGINE
POWER message is displayed in combination with the
COOLANT OVER TEMP message, see “Engine
Overheating” in the Index.
SERVICE VEHICLE SOON: If this message appears
on the DIC, there may be an electrical or another system
problem with your vehicle. Have your vehicle checked
by your dealer if this message keeps appearing.
CHARGE SYSTEM FAULT Press RESET to
acknowledge that you have read the message and to
remove it from the display. The message will reappear
every
10 minutes until this condition changes. You will
hear two chimes when this message is displayed.
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Downloaded from www.Manualslib.com manuals search engine If this message comes on while you are driving, you
may have a problem with the electrical charging system.
It could indicate that you have a loose or broken drive
belt
or another electrical problem. Have it checked right
away. Driving while this light is on could drain
your battery.
If you must drive a short distance with the message on,
be certain to turn
off your accessories, such as the radio
and air conditioner.
TRACTION SYS ACTIVE - : When your traction
control system is limiting wheel spin, the TRACTION
SYS ACTIVE message will be displayed. Slippery road
conditions may exist
if this message is displayed, so
adjust your driving accordingly. The message will stay
on for a few seconds after the traction control system
stops limiting wheel spin.
TRACTION SYSTEM-ON: This message is displayed
when you decide to turn on the TCS by pressing the
switch
on the console. This message will shut off
automatically on its own.
TRACTION SYSTEM-OFF: You will hear a single
quick tone when this message is displayed. This
message comes on and stays on when the TCS button on the console is pressed to turn the system
off. To
acknowledge this message, press
RESET.
SERVICE TRACTION SYSTEM - : If the SERVICE
TRACTION
SYS message is displayed when you are
driving, there is a problem with your Traction Control
System and your vehicle is in need
of service. When this
message is displayed, the system will not limit wheel
spin. Adjust your driving accordingly.
If you have the optional Active Handling System, the SERVICE ACTIVE
HNDLG message will also be
displayed and the instrument cluster car icon will also be
illuminated. The driver can acknowledge both messages
by pressing the reset button two times which
will also
turn
off the instrument cluster icon. When the service
messages are displayed, the computer controlled systems will not assist the driver in controlling the
vehicle. Have the system repaired as soon as possible.
Adjust your driving accordingly.
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Downloaded from www.Manualslib.com manuals search engine SERVICE RIDE CONTROL: This message is used to
indicate to the driver that the Selective Real Time
Damping (SRTD) system has detected a malfunction
and that the system must be serviced. The SERVICE
RIDE CONTROL message will always come on when a
failure is detected by the Selective Real Time Damping
system. If
a fault is present in the SRTD which causes
the shocks to be in their full soft condition, the
SERVICE RIDE CONTROL, SHOCKS
INOPERATIVE and MAXIMUM
80 MPH (129 km/h)
will display together. You will never get a SHOCKS
INOPERATIVE and MAXIMUM SPEED
80 MPH
(129
km/h) message without a SERVICE RIDE
CONTROLmessage.
SHOCKS INOPERATIVE: You will hear four chimes
when this message is displayed. To acknowledge that
you have read the message and to remove it from the
display, press RESET. The message will reappear every
10 minutes until this condition changes.
This message indicates that a malfunction is present in
the Selective Real Time Damping system which is
causing the shocks to be in their full soft mode. This is a
warning to the driver that the vehicle handling may be
affected. Have your vehicle serviced as soon as possible.
MAXIMUM SPEED 80 MPH (129 km/h): You will
hear four chimes when this message is displayed.
To
acknowledge the warning, press RESET. After you press
RESET, a message will reappear every
10 minutes until
this condition changes.
This message indicates that the vehicle speed will be limited to
80 mph (129 km/h) when the shock absorber
system has failed and the shocks are in their full
soft
mode. Have your vehicle serviced as soon as possible.
LOW COOLANT You will hear two chimes when this
message is displayed. To acknowledge the warning,
press RESET. After you press RESET, a message will
reappear and you will hear a chime every
10 minutes
until this condition changes.
This message indicates that the coolant in the system is
low. You may need to add coolant. See “Engine
Overheating” in the Index.
COOLANT OVER TEMP: You will hear four chimes
and the CHECK GAGES telltale
will come on when this
message is displayed. To acknowledge the warning,
press the RESET button. After you press the RESET
button, a message will be displayed and you will hear a chime every minute until this condition changes. If you
do not press RESET, the message will remain on the
digital display until the condition changes.
2-101

Downloaded from www.Manualslib.com manuals search engine If the engine coolant exceeds 255 “F (124”C), this
message is displayed. If you have been operating your
vehicle under normal driving conditions, you should
pull off from
the road, stop your vehicle and turn off the
engine as soon as possible. You can monitor the coolant
temperature with the GAGES button on the DIC or the
engine coolant gage on the instrument panel cluster. See
“Engine Overheating” in the Index.
HIGH OIL TEMPERATURE REDUCE ENGINE
RPM: You will hear four chimes when this message is
displayed. To acknowledge the warning, press the
RESET button. After you press the RESET button, a
message will be displayed and you will hear a chime
every minute until this condition changes. If you do not
press RESET, the message will remain on the digital
display until the condition changes.
If the engine oil temperature exceeds
320°F (1 60” C),
this message is displayed. You should check the engine
coolant temperature and engine oil level. If your engine
is too hot, see “Engine Overheating’’ in the Index. Your
vehicle may need service,
so see your dealer. You can
monitor the oil temperature with the GAGES button on
the DIC.
HIGH TRANS TEMP: You will hear four chimes
when this message is displayed. To acknowledge this
warning, press the RESET button. After you press the
RESET button, the message will be displayed every
10 minutes until the condition changes. If you do not
press RESET, the message remains on the display until
the condition changes.
If the transmission fluid temperature rises above 263°F
(128°C) or rises rapidly, this message is displayed. The
transmission may shift gears or apply the torque
converter clutch to reduce the fluid temperature. Driving
aggressively or driving on long hills can cause the
transmission fluid temperature to be higher than normal.
If this message appears, you may continue to drive at a
slower speed. You should also monitor the transmission
fluid temperature and allow it to cool to at least 230°F
(1 10°C). The transmission fluid temperature can be
monitored with the GAGES button on the DIC. See
“Automatic Transmission Fluid” in the Index. You
should also check the engine coolant temperature.
If it is
also hot, see “Engine Overheating” in the Index.
If the HIGH TRANS TEMP message is displayed
during normal vehicle operation on flat roads, your
vehicle may need service. See your dealer for an
inspection.
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Downloaded from www.Manualslib.com manuals search engine HIGH TIRE PRESSURE - (LF, LR, RF, RR): YOU
will hear two chimes when this message is displayed. To
acknowledge the warning, press RESET. After you press
RESET, a message
will reappear and you will hear a
chime every
10 minutes until this condition changes. This
message indicates that the pressure in one of your tires is higher than
42 psi (290 Pa). Next to the HIGH TIRE
PRESSURE message,
you can see either LF (left front),
LR (left rear), RF (right front) or RR (right rear) to
indicate to you which tire is higher than
42 psi (290 Wa).
You can receive more than one tire pressure message at a
time. To read other messages that may have been sent at
the same time, press RESET.
If a tire pressure message
appears
on the DX, stop as soon as you can. Have the tire
pressures checked and set to those shown on your Tire
Loading Information Label. See “Extended
Mobility
Tires” and “Tire Inflation” in the Index.
SERVICE TIRE MON SYS: If this message comes on,
a part on the Tire Pressure Monitor (TPM) is not
working properly. If you drive your vehicle while any of
the four sensors are missing or hoperable, the warning
will come on in approximately
10 minutes. If all four
sensors are missing, the warning will come on in
approximately
15 to 20 minutes. (All the sensors would
be missing, for example, if you put different wheels on
your vehicle without transferring the sensors.) If the
warning comes
on and stays on, there may be a problem
with the TPM. See your dealer.
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