2000 CHEVROLET IMPALA sensor

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TRNKJAMB (Trunk Jamb): This feature allows the
content theft system trunk lock sensor to be disabled or
enabled. To customize the trunk lock sensor:
1. Scroll, using the SEEK up or down arrows, until
TRNKJAMB appears on the display.
2. Press the PREV or NEXT button to enter the
submenu. The current selection will have an asterisk
next to it. Scroll through the following options:

TRNK OFF
- Turns feature off.

TRNK ON
- Turns feature on.
3. With your preference displayed, press the DISP
button to select. A chime will be heard to verify the
new setting. The new selection will be displayed
with an asterisk for one second.
CHIRP (Horn Chirp Timer): This feature allows you
to choose between short or long horn chirp sounds
when the remote keyless entry transmitter is used.
To customize the length of horn chirps:
1. Scroll until CHIRP appears on the display.2. Press the PREV or NEXT button to enter the
submenu. Scroll through the following options:

SHORT
- Short Chirp (16 msec)

LONG
- Long Chirp (32 msec)
3. With your preference displayed, press the DISP
button to select. A chime will be heard to verify the
new setting. The new selection will be displayed
with an asterisk for one second.
ORIG SET (Return to the Original Settings): This
feature allows you to return all feature customization
settings back to their original factory settings. To reset:
1. Scroll until ORIG SET appears on the display.
2. Press the PREV or NEXT button to enter the
submenu. Scroll through the following options:

SET ALL
- Returns to factory settings.
3. With your preference displayed, press the DISP
button to select. A chime will be heard to verify the
new setting. The new selection will be displayed
with an asterisk for one second.

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AUTOMATIC OVERDRIVE (
): This position is
for normal driving. If you need more power for passing,
and you're:

Going less than 35 mph (55 km/h), push your
accelerator pedal about halfway down.

Going about 35 mph (55 km/h) or more, push the
accelerator pedal all the way down.
You'll shift down to the next gear and have
more power.
NOTICE:
If your vehicle seems to start up rather slowly, or
if it seems not to shift gears as you go faster,
something may be wrong with a transaxle system
sensor. If you drive very far that way, your
vehicle can be damaged. So, if this happens, have
your vehicle serviced right away. Until then, you
can use SECOND (2) when you are driving less
than 35 mph (55 km/h) and AUTOMATIC
OVERDRIVE (
) for higher speeds.
THIRD (3): This position is also used for normal
driving, but it offers more power and lower fuel
economy than AUTOMATIC OVERDRIVE (
).
Here are some times you might choose THIRD (3)
instead of AUTOMATIC OVERDRIVE (
):

When driving on hilly, winding roads.

When towing a trailer, so there is less shifting
between gears.

When going down a steep hill.

When driving in non
-highway scenarios
(i.e. city streets, etc.).
SECOND (2): This position gives you more power but
lower fuel economy. You can use SECOND (2) on hills.
It can help control your speed as you go down steep
mountain roads, but then you would also want to use
your brakes off and on.

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2-45 Daytime Running Lamps
Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the day.
DRL can be helpful in many different driving
conditions, but they can be especially helpful in the
short periods after dawn and before sunset.
A light sensor on top of the instrument panel makes the
DRL work, so be sure it isn't covered.
The DRL system will make your high
-beam headlamps
come on at a reduced brightness when:

the ignition is on,

the headlamp switch is off,

the gearshift is not in PARK (P) and

the parking brake is released.
When the DRL are on, only your high
-beam headlamps,
at a reduced brightness, will be on. The headlamps,
taillamps, sidemarker and other lamps won't be on.
Your instrument panel won't be lit up either.
When it's dark enough outside, your high
-beam
headlamps will turn off and your vehicle's headlamps
and parking lamps will turn on. The other lamps that
come on with your headlamps will also come on.When it's bright enough outside, your headlamps will go
off and your high
-beam headlamps will come on.
As with any vehicle, you should turn on the regular
headlamp system when you need it.
Delayed Headlamp Illumination
Delayed headlamp illumination provides a period of
exterior lighting as you leave your vehicle's area. The
feature is activated when your vehicle's headlamps are
on due to the automatic headlamp control feature
described previously in this section, and when your
vehicle's ignition is turned off. Your headlamps will
then remain on until the headlamp switch is moved from
OFF to the parking lamp position or until either a
30 second or 60 second lighting period has ended.
If you turn off the ignition with the headlamp switch in
the parking lamp or headlamp position, the delayed
headlamp illumination cycle will not occur.
To disable the delayed headlamp illumination feature or
change the time of delay, see ªVehicle Customization
Settingsº in the Index.

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2-63 Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows the air bag symbol. The system
checks the air bag's electrical system for malfunctions.
The light tells you if there is an electrical problem. The
system check includes the air bag sensors, the air bag
modules, the wiring and the crash sensing and
diagnostic module. For more information on the air bag
system, see ªAir Bagº in the Index.
This light will come on
when you start your vehicle,
and it will flash for a few
seconds. Then the light
should go out. This means
the system is ready.
If the air bag readiness light stays on after you start the
vehicle or comes on when you are driving, your air bag
system may not work properly. Have your vehicle
serviced right away.
CAUTION:
If the air bag readiness light stays on after you
start your vehicle, it means the air bag system
may not be working properly. The air bags in
your vehicle may not inflate in a crash, or they
could even inflate without a crash. To help avoid
injury to yourself or others, have your vehicle
serviced right away if the air bag readiness light
stays on after you start your vehicle.
The air bag readiness light should flash for a few
seconds 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.

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Manual Compass Calibration
If the compass appears erratic and the calibration
symbol does not appear, you must manually put the
compass into the calibration mode.
Turn the ignition on and cycle the DIC to the
Compass/Temperature mode. Press the RESET button
for at least 10 seconds until the calibration symbol
appears and all segments of the compass display are
illuminated. Release the button and complete three 360

turns in an area free from large metal objects. The
calibration symbol will turn off and the compass reading
will be displayed.
Error Displays

An error of the vehicle's speed sensor or fuel sender
will cause ª
-E-º to be displayed.

In the absence of vehicle communications, a double
dash ª
--º is displayed.
If one of these error messages appear, see your dealer.
Trip Computer
There are five trip computer displays which may be
stepped through by pushing the MODE button.
The information will appear in the following order:

AVG ECON (Average Fuel Economy): This shows
the average fuel economy since the last reset.

INST ECON (Instantaneous Fuel Economy):
This shows fuel economy for the most recent second
of driving.

RANGE (Trip Range): This shows the estimated
distance that can be traveled with the remaining fuel.
The fuel economy used to calculate range is based on
the last few hours of driving.

FUEL USED (Trip Fuel Used): This shows the
accumulated fuel used since the last reset.

AVG SPEED (Average Speed): This shows the
average speed since the last reset.
Resetting the Trip Computer
Press and hold the RESET button for at least two
seconds. The reset is acknowledged with the display
showing all segments on for a period of half a second.
A reset can only be done in AVG ECON, FUEL USED
and AVG SPEED displays.

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Tight/Loose Tape Sensor Defeat
With the radio off and the ignition on, press and hold
the TAPE AUX button to disable the tight/loose tape
sensing feature to enable play of some tape head
cleaners and portable CD adapters. The radio will
display READY and flash the cassette icon. The
tight/loose tape sensing feature will then be disabled
until the next cassette eject.
CD Adapter Kits
It is possible to use a CD adapter kit with your cassette
tape player after activating the bypass feature on your
tape player.
To activate the bypass feature, use the following steps:
1. Turn the ignition to ON or ACC.
2. Turn the radio off.
3. Press and hold the TAPE button for five seconds.
READY will appear on the display for five seconds,
indicating the feature is active.
4. Insert the adapter. It will power up the radio and
begin playing.
This override routine will remain active until EJT
is pressed.Playing a Compact Disc
Insert a disc partway into the slot, label side up. The player
will pull it in. The disc should begin playing. The display
will show the CD symbol. If you want to insert a compact
disc with the ignition off, first press DISP or EJT.
If you're driving on a very rough road or if it's very hot,
the disc may not play and CHECK CD may appear on
the display. When things get back to normal, the disc
should play. If the disc comes out, it could be that:

The disc is upside down.

It is dirty, scratched or wet.

It is very humid. (If so, wait about an hour
and try again.)
If any error occurs repeatedly or if an error can't be
corrected, please contact your dealer.
PREV (1): Press this button to go to the previous track
if the current selection has been playing for less than
eight seconds. If the PREV button is pressed and
the current selection has been playing for more than
eight seconds, it will go to the beginning of the current
selection. TRACK and the track number will appear on
the display. If you hold the button or press it more than
once, the player will continue moving back through the
disc. The sound will mute while seeking.

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Circuit Relay Description
FAN CONT #3 Secondary Cooling Fan
(Passenger's Side)
FAN CONT #2 Cooling Fan Control Relay
FAN CONT #1 Primary Cooling Fan
(Driver's Side)
IGN RELAY Ignition Relay
A/C CMPR HVAC CompressorMaxi Fuses Description
IGN SW Ignition Switch
BLANK Blank
U/HOOD #2 Ignition Relay, AIR Pump
COOLING
FANSCooling Fans (Battery)
Mini Fuses Description
FAN CONT #2
& #3Cooling Fan Control
Relays #2 & #3
FAN CONT #1 Cooling Fan Control Relays #1
AIR PMP RLY Air Induction Reaction Pump
Relay (Battery)
FUEL INJ Fuel Injectors
TRANS SOL Transmission Solenoids
A/C RLY
(COIL)HVAC Control Relay
ENG
DEVICESCanister Purge Solenoid, Mass Air
Flow Sensor (MAF), AIR Pump
Relay & Valve Control
DFI MDL Direct Fire Ignition Module
OXY SEN Oxygen Sensors
(Pre and Post Converter)