2005 CHEVROLET VENTURE brake sensor

Warm-Up Shift
Your vehicle has a computer controlled transaxle
designed to warm up the engine faster when the outside
temperature is 35°F (2°C) or colder. You may notice
that the transaxle will shift at a higher vehicle speed until
the engine is warmed up. This is a normal condition
designed to provide heat to the passenger compartment
and defrost the windows more quickly. SeeClimate
Control System on page 3-24for more information.
THIRD (3):This position is also used for normal driving,
but it offers more power and lower fuel economy than
AUTOMATIC OVERDRIVE (D).
Here are some times you might choose THIRD (3)
instead of AUTOMATIC OVERDRIVE (D):
When driving on hilly, winding roads
When towing a trailer, so there is less shifting
between gears
When going down a steep hill
SECOND (2):This position gives you more power but
lower fuel economy than THIRD (3). 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.Notice:Driving in SECOND (2) for more than
25 miles (40 km) or at speeds over 55 mph (90 km/h)
may damage the transaxle. Also, shifting into
SECOND (2) at speeds above 65 mph (105 km/h) can
cause damage. Drive in THIRD (3) or AUTOMATIC
OVERDRIVE (D) instead of SECOND (2).
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 THIRD (3) for higher speeds.
FIRST (1):This position gives you even more power but
lower fuel economy than SECOND (2). You can use it on
very steep hills, or in deep snow or mud. If the shift lever
is put in FIRST (1), the transaxle will not downshift into
rst gear until the vehicle is going slow enough.
Notice:Spinning the tires or holding the vehicle in
one place on a hill using only the accelerator
pedal may damage the transaxle. If you are stuck,
do not spin the tires. When stopping on a hill,
use the brakes to hold the vehicle in place.
2-35

A light sensor on top of the instrument panel makes the
DRL work, so be sure it is not covered. The DRL
system will make front parking and turn signal lamps
come on in daylight when the following conditions
are met:
The ignition is on.
The exterior lamps control is off.
The parking brake is released.
When the DRL are on, only your front parking and turn
signal lamps will be on. Your instrument panel will
not be lit up.
When it is dark enough outside, the exterior lamps will
come on automatically. When it is bright enough
outside, the exterior lamps will turn off and the DRL will
turn on. Of course, you may still turn on the headlamps
any time you need to.
If you start your vehicle in a dark garage, the automatic
headlamp system will come on immediately. Once
you leave the garage, it will take approximately
one minute for the automatic headlamp system to
change to DRL if it is light outside. During that delay,
your instrument panel cluster may not be as bright
as usual. Make sure your instrument panel brightness
control is in the full bright position. SeeInstrument Panel
Brightness on page 3-15.To idle your vehicle with the DRL and automatic
headlamps off, set the parking brake while the ignition is
in OFF or LOCK. Then start the vehicle. The DRL
and automatic headlamps will stay off until you release
the parking brake.
As with any vehicle, you should turn on the regular
headlamp system when you need it.Instrument Panel Brightness
The thumbwheel for this feature is located below the
exterior lamps control. Turn the thumbwheel to the right
to brighten the lights, or to the left to dim them.
Interior Lamps Control
Turn the thumbwheel all the way to the right to turn on
the interior lamps, if the interior lamps override
switch is off. Turn the thumbwheel to the left to turn the
lamps off.
3-15

How the System Works
Unless disabled, the URPA will turn on automatically
when the shift lever is moved into REVERSE (R). When
the system turns on, the three lights on the display
will illuminate for one and a half seconds to let you know
that the system is working. If your vehicle is moving in
REVERSE (R) at a speed greater than 3 mph (5 km/h),
the red light will ash to remind you that the system
does not work at speed greater than 3 mph (5 km/h).
If an object is detected at a REVERSE (R) speed of less
than 3 mph (5 km/h), one of the following will occur:
Description English Metric
amber light 5 ft 1.5 m
amber/amber lights 40 in 1.0 m
amber/amber/red lights &
continuous chime20 in 0.5 m
amber/amber/red lights
ashing & continuous
chime1 ft 0.3 m
A chime will sound the rst time an object is detected
between 20 inches (0.5 m) and 5 feet (1.5 m) away.
URPA cannot detect objects that are above liftgate level.
In order for the rear sensors to recognize an object, it
must be within detection range behind the vehicle.
When the System Does Not Seem to Work
Properly
The light may ash red when the vehicle is in
REVERSE (R) if the ultrasonic sensors are not kept
clean. So be sure to keep your rear bumper free of mud,
dirt, snow, ice and slush. Other conditions that may
affect system performance include things like the
vibrations from a jackhammer or the compression of air
brakes on a very large truck. If after cleaning the
rear bumper and then driving forward at least 15 mph
(25 km/h), the display continues to ash red, see
your dealer.
If a trailer was attached to your vehicle, or a bicycle or
an object was on the back of, or hanging out of your
liftgate during your last drive cycle, the light may
also ash red. The light will continue to ash whenever
in REVERSE (R) until your vehicle is driven forward
at least 15 mph (25 km/h) without any obstructions
behind the vehicle.
For cleaning instructions, seeWashing Your Vehicle on
page 5-86.
3-22

Fuse Usage
HTD MIRROR Heated Mirrors
RH T/LP Not Used
RR FOG LP Not Used
CIGAR/DIC/
APO FRTCigarette Lighter, DIC, Front
Auxiliary Power Outlets, Data Link
T/SIG Turn Signal Switch
PWR QTR
VENTInterior Lamp and Multifunction
Switch (Power Vent Switch),
Auto Level
FRT/WPR/
WSHRWindshield Wiper/Washer Motor
and Switch
HAZARD Hazard Switch
RR PWR SCKTRear Electric Accessory Plug
Housing
DRLDaytime Running Lamp Control
Module
LH T/LP Not Used
RR
DEFOG/HTD
MIRRORRear Window Defogger Relay,
Heated Mirrors
ON STAR OnStar
®
SIR Inatable Restraint Control Module
HVAC
BLOWERHeater-A/C Control
Fuse Usage
MALL
CLUSTERInstrument Cluster, Body Control
Module, Electronic Level Control
(ELC) Sensor and Relay, Theft,
Door Ajar
STOP LAMP Stoplamp Switch
CLUSTER
BATTModule/Electronic Brake Control
Module/Electronic Brake Traction
Control Module (EBCM/EBTCM)
ENHANCED
EVAP/AWDEvaporative Emissions (EVAP)
Canister Vent Solenoid Valve,
All-Wheel Drive (AWD)
Blank Not Used
ELC/TRAILERELC Air Compressor and ELC
Height Sensor, Trailer Harness
CTSY LAMP Courtesy Lamp
IGN 1BCM, Electronic Brake Control
Indicator Lamp Driver Module,
Instrument Panel Cluster, Rear Side
Door Actuator Control Module, Rear
Windows, Rear Parking Aid
RR HVAC
TEMP CONTRear HVAC-A/C Control
RR
WPR/WSHRRear Window Wiper Motor, Rear
Window Wiper/Washer and
Multifunction Switch (Rear Window
Wiper/Washer Switch)
5-94