2002 CHEVROLET CORVETTE ABS

2-85 Anti-Lock Brake System Warning Light
With the anti-lock brake
system, the light will
come on when your
engine is started and may
stay on for several seconds.
That's normal.
If the light stays on, turn the ignition to OFF. Or, if the
light comes on when you're driving, stop as soon as
possible and turn the ignition off. Then start the engine
again to reset the system. If the light still stays on, or
comes on again while you're driving, your vehicle needs
service. If the regular brake system warning light isn't
on, you still have brakes, but you don't have anti
-lock
brakes. If the regular brake system warning light is
also on, you don't have anti
-lock brakes and there's a
problem with your regular brakes. See ªBrake System
Warning Lightº earlier in this section. Also see ªService
ABSº under ªDriver Information Center (DIC)
Messagesº in the Index.
The anti
-lock brake system warning light should
come on briefly when you turn the ignition key to ON.
If the light doesn't come on then, have it fixed so it will
be ready to warn you if there is a problem.
Traction Control System (TCS) Light
This light should come on
briefly as you start the
engine. If the light doesn't
come on then, have it fixed
so it will be ready to warn
you if there's a problem.
If it stays on, or comes on and the DIC shows a
SERVICE TRACTION SYSTEM message when
you're driving, there's a problem with your TCS system
and your vehicle needs service. When this light is on,
the system will not limit wheel spin. Adjust your
driving accordingly. If the driver turns off the Traction
Control System by pressing the button on the console,
the TCS system light will come on and the TRACTION
SYSTEM OFF message will show on the DIC.

2-104
DIC Warnings and Messages
The following messages and warnings may appear in
the DIC display. The DIC display area is located in the
instrument panel cluster below the speedometer and
tachometer, directly above the steering column. You may
receive more than one message at a time. Messages will
appear one behind the other. To acknowledge a message
and remove it from the display, press RESET. You may
scroll through the messages that may have been sent at
the same time. The message center is continuously
updated with the vehicle performance status.
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.ACT HNDLG
- WARMING UP: When you first
start your vehicle (especially during cold winter weather),
and begin to drive away (up to 6 mph (10 km/h)), the
message ACT HNDLG
- WARMING UP may be
displayed in the DIC, the instrument panel cluster light
will be on, and a chime will sound. This is normal.
You can acknowledge this message by pressing the
RESET button. The Active Handling System
performance is affected until the next message
WARM UP COMPLETE is displayed in the DIC.
During hot or cold temperature conditions, this message
may be displayed in the DIC after exceeding 12 mph
(20 kph) for 30 seconds. The Active Handling System
is off until the WARM UP COMPLETE message
is displayed.
WARM UP COMPLETE: If you receive this message
and hear a chime, the system has completed the
functional check of the Active Handling System.

2-105
TRAC/ACT HNDLG - ON: If the Traction Control
and Active Handling Systems are off, depressing the
Active Handling System console button momentarily
will turn both systems on. The message TRAC/ACT
HNDLG
- ON will be displayed temporarily in the DIC,
the instrument panel cluster light will be off and a chime
will sound.
TRAC/ACT HNDLG
- OFF: By pressing the Active
Handling System console button briefly, the driver can
turn the Traction Control and Active Handling Systems
off. The message TRAC/ACT HNDLG
- OFF will
be displayed in the DIC, the instrument panel cluster
light will be on and a chime will sound. You can
acknowledge this message by pressing the RESET
button. The anti
-lock brake systems remains on with
the Traction Control and Active Handling Systems off.
You should adjust your driving accordingly.
COMPETITIVE DRIVING: When the Competitive
Driving mode is selected, this message will be displayed
in the DIC. The instrument panel cluster light will not
be on when the Competitive Driving mode is selected.
The Traction Control System will not be operating while
in the Competitive Driving mode. You should adjust
your driving accordingly.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 ªBrake System Warning Lightº 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.

2-109
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 a malfunction is present
in the selective real time damping system. 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.
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.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 ªEngine Overheatingº in the Index.
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 (160
C),
this message is displayed. You should check the engine
coolant temperature and engine oil level. If your engine
is too hot, see ªEngine Overheatingº 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.

3-6
A Typical Cold Weather Example:
Your vehicle has been parked outside overnight in
cold weather (below 32
F/ 0
C) and you have set the
driver temperature at 73
F (23
C) and have selected
the AUTO mode. The system will automatically adjust
the temperature output to maximum heating. The fan
will start at a low speed. This is to avoid blowing cold
air into the vehicle. The length of the delay depends on
the amount of time since the engine was last started, the
outside temperature and the engine coolant temperature.
As the coolant warms up, the fan speed will gradually
increase. Air will flow to the floor with some air to
the windshield to prevent fogging under most
normal conditions.
As the interior of the vehicle warms up to the set
temperature, the fan speed will decrease and the
temperature output may become cooler. If the interior
temperature continues to warm up due to heating from
the sun or outside temperature increases, the system
may switch to other air delivery modes (typically defog
or bi
-level).A Typical Hot Weather Example:
The vehicle has been parked outside all day in hot
weather (above 80
F/ 27
C) and you have set the
driver temperature at 73
F (23
C) and have selected the
AUTO mode. The system will automatically adjust the
temperature output to maximum cooling. The fan will
start at a low speed momentarily to push the hot air to
the floor of the vehicle and then go to a higher fan speed
with cold airflow out of the instrument panel outlets.
A small amount of airflow will continue through the
lower ducts to cool the floor area.
The air intake may start in the recirculated mode for
maximum cooling performance. As the interior of the
vehicle cools down to the set temperature, the fan speed
will decrease and the temperature output may become
warmer. The air intake may shift from recirculation to
outside air mode. If the interior continues to cool due to a
decrease in the amount of heat the vehicle is absorbing
from the sun or a decrease in the outside temperature, the
system could switch to other air delivery modes (typically
bi-level or defog).

3-10 Sensors
The automatic electronic dual climate control system
uses several sensors to control operation and
display information.
Solar Load Sensor
This sensor is located on the top right side of the
defroster grille. The defroster grille is on the top of
the instrument panel.
The sensor monitors the sun's solar radiation and uses
this information as part of the automatic climate control
system when operating in the AUTO mode.
Be careful not to put anything over the sensor. When
covered, the sensor cannot compensate for changes in
the amount of heat the vehicle is absorbing from the sun.
Outside Air Temperature Sensor
This sensor is located in the air intake under the front
bumper of the vehicle. Information from this sensor is
used for the outside air temperature readings shown on the
digital display for the automatic climate control system.If the outside temperature goes up, the displayed
temperature will not change until:

The vehicle's speed is above 16 mph (26 km/h) for
one and a half minutes.

The vehicle's speed is above 45 mph (72 km/h) for
one minute.
These delays help prevent false readings. If the
temperature goes down, the outside temperature
display is updated immediately.
If the vehicle has been turned off for more than three
hours, the current outside temperature will be shown
when you start the vehicle. If it has been turned off for
less than three hours, the temperature will be recalled
from the previous vehicle operation.
Inside Temperature Sensor
This sensor is located to the left of the ignition switch.
The automatic climate control system uses this sensor
to receive information, so if you block or cover it,
the system will not function properly.

4-7
Avoid needless heavy braking. Some people drive
in spurts
-- heavy acceleration followed by heavy
braking
-- rather than keeping pace with traffic.
This is a mistake. Your brakes may not have time to
cool between hard stops. Your brakes will wear out
much faster if you do a lot of heavy braking. If you
keep pace with the traffic and allow realistic following
distances, you will eliminate a lot of unnecessary
braking. That means better braking and longer
brake life.
If your engine ever stops while you're driving, brake
normally but don't pump your brakes. If you do,
the pedal may get harder to push down. If your engine
stops, you will still have some power brake assist.
But you will use it when you brake. Once the power
assist is used up, it may take longer to stop and the
brake pedal will be harder to push.
Anti-Lock Brake System (ABS)
Your vehicle has anti-lock brakes. ABS is an
advanced electronic braking system that will help
prevent a braking skid.
When you start your engine and begin to drive away,
your anti
-lock brake system will check itself. You may
hear a momentary motor or clicking noise while this test
is going on, and you may even notice that your brake
pedal moves a little. This is normal.
If there's a problem with
the anti
-lock brake system,
this warning light will stay
on. See ªAnti
-Lock Brake
System Warning Lightº in
the Index.

4-8
Let's say the road is wet and you're driving safely.
Suddenly, an animal jumps out in front of you.
You slam on the brakes and continue braking.
Here's what happens with ABS:
A computer senses that wheels are slowing down.
If one of the wheels is about to stop rolling, the
computer will separately work the brakes at each wheel.The anti
-lock system can change the brake pressure
faster than any driver could. The computer is
programmed to make the most of available tire and
road conditions. This can help you steer around the
obstacle while braking hard.
As you brake, your computer keeps receiving updates on
wheel speed and controls braking pressure accordingly.