2009 CADILLAC DTS sensor

Rainsense™ II Wipers
For vehicles with this feature, the moisture sensor is
mounted on the interior side of the windshield behind the
rearview mirror. It is used to automatically operate the
wipers by monitoring the amount of moisture build-up
on the windshield. Wipes occur as needed to clear the
windshield depending on driving conditions and the
sensitivity setting. In light rain or snow, fewer wipes will
occur. In heavy rain or snow, wipes will occur more
frequently. The Rainsense II wipers operate in a delay
mode as well as a continuous low or high speed as
needed. If the system is left on for long periods of time,
occasional wipes may occur without any moisture on
the windshield. This is normal and indicates that the
Rainsense II system is activated.
The Rainsense II system can be activated by turning the
wiper band to one of the ve sensitivity levels indicated
on the wiper stalk. The position closest to off is the lowest
sensitivity setting, level one. This setting lets more rain or
snow to collect on the windshield between wipes. Turning
the wiper band away from you to higher sensitivity levels
increases the sensitivity of the system and frequency ofwipes. The highest sensitivity setting, level ve is closest
to low. A single wipe occurs each time the wiper stalk is
turned to a higher sensitivity level to indicate that the
sensitivity level has been increased.
Notice:Going through an automatic car wash with
the wipers on can damage them. Turn the wipers
off when going through an automatic car wash.
The mist and wash cycles operate as normal and are
not affected by the Rainsense II function. The Rainsense
II system can be overridden at any time by manually
turning the wiper band to low or high speed.
When Rainsense II is active, the headlamps turn on
automatically. The headlamps will turn off again once the
wipers turn off if it is light enough outside. If it is dark,
they remain on. SeeWiper Activated Headlamps
on page 3-32for more information.
Notice:Do not place stickers or other items on
the exterior glass surface directly in front of
the moisture sensor. Doing this could cause
the moisture sensor to malfunction.
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The exterior lamps control has four positions:
O(Off):Turns off the exterior lamps except for
Daytime Running Lamps (DRL).
AUTO (Automatic):Automatically turns on the
headlamps at normal brightness, together with the
following:
Parking Lamps
Instrument Panel Lights
IntelliBeam™
;(Parking Lamps):Turns on the parking lamps
together with the following:
Instrument Panel Lights
License Plate Lamps
Taillamps
Side Marker Lamps
The parking brake indicator light comes on and stays
on while the parking lamps are on with the engine
off and the ignition in ACC/ACCESSORY or ON/RUN.
2(Headlamps):Turns on the headlamps together
with the previously listed lamps. A warning chime sounds
if the driver’s door is opened while the ignition switch is off
and the headlamps are on.
#(Fog Lamps):Press the exterior lamps control to
turn on the fog lamps. SeeFog Lamps on page 3-34.
IntelliBeam™ Intelligent High-Beam
Headlamp Control System
For vehicles with this feature, be sure to read this entire
section before using it.
IntelliBeam is an enhancement to the vehicle’s
headlamp system. Using a digital light sensor on
the rearview mirror, this system turns the vehicle’s
high-beam headlamps on and off according to
surrounding traffic conditions.
The IntelliBeam system turns the high-beam headlamps
on when it is dark enough, there is no other traffic
present, and the IntelliBeam system is enabled.
Turning On and Enabling IntelliBeam™
Press and release the IntelliBeam button on the inside
rear view mirror. The IntelliBeam indicator on the mirror
turns on to indicate the system is on. Once the system
has been turned on, it remains on each time the vehicle
is started, but the IntelliBeam system must be enabled.
To enable the IntelliBeam system, turn the exterior lamp
control to AUTO, with the turn signal/multifunction lever in
its neutral position. The High-Beam On Light appears on
the instrument panel cluster when the high-beams are on.
SeeHighbeam On Light on page 3-66.
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Driving with IntelliBeam™
IntelliBeam only activates the high-beams when driving
over 20 mph (32 km/h).
The high-beam headlamps remain on, under the
automatic control of IntelliBeam, until any of the
following situations occur:
The system detects an approaching vehicle’s
headlamps.
The system detects a preceding vehicle’s taillamps.
The outside light is bright enough that high-beam
headlamps are not required.
The vehicle’s speed drops below 15 mph (24 km/h).
The headlamp stalk is moved forward to the
high-beam position or the ash-to-pass feature is
used. SeeHeadlamp High/Low-Beam Changer
on page 3-9andFlash-to-Pass on page 3-13.
When either of these conditions occur, the
IntelliBeam feature is disabled and the IntelliBeam
light in the mirror turns off until the high-beam
stalk is returned to the neutral position.
If IntelliBeam was using low-beams prior to this
action, the IntelliBeam feature is temporarily disabled
until the stalk is returned to the neutral position.
The exterior lamp control is turned to any setting
except AUTO.
When this occurs, IntelliBeam is disabled until the
control is turned back to the AUTO position.
The IntelliBeam system is turned off at the inside
rearview mirror.
IntelliBeam might not turn off the high-beams if the
system cannot detect other vehicle’s lamps because of
any of the following:
The other vehicle’s lamp(s) are missing, damaged,
obstructed from view, or otherwise undetected.
The other vehicle’s lamp(s) are covered with dirt,
snow, and/or road spray.
The other vehicle’s lamp(s) cannot be detected due
to dense exhaust, smoke, fog, snow, road spray,
mist, or other airborne obstructions.
Your vehicle’s windshield is dirty, cracked, or
obstructed by something that blocks the view of
the IntelliBeam light sensor.
Your vehicle’s windshield is covered with ice, dirt,
haze, or other obstructions.
Your vehicle is loaded such that the front end of
the vehicle points upward, causing the IntelliBeam
sensor to aim high and not detect headlamps and
taillamps.
You are driving on winding or hilly roads.
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You might need to manually disable or cancel the
high-beam headlamps by turning the low-beam
headlamps on, if any of the above conditions exist.
Disabling and Resetting IntelliBeam™ at
the Rearview Mirror
IntelliBeam can be disabled by using the controls on the
inside rearview mirror.
AUTO
3(On/Off):Press this button on the inside
rearview mirror to disable the system. The IntelliBeam
indicator turns off and does not come back on until
the IntelliBeam button is pressed again.
When IntelliBeam has turned on the high-beams, pull or
push the high-beam stalk. This will disable IntelliBeam.
The IntelliBeam indicator on the mirror turns off. To turn
IntelliBeam back on, press the IntelliBeam button on the
mirror.
A different sensitivity setting is available for dealer/
retailer diagnostics. This is done by pushing and holding
this button for 20 seconds until the IntelliBeam indicator
light ashes three times. If you accidentally activate this,
the vehicle’s setting automatically is reset when the
ignition is turned off and then on again.
Cleaning the IntelliBeam™ Light Sensor
The light sensor is located
on the inside of the vehicle
in front of the inside
rearview mirror.
Clean the light sensor window, periodically, using glass
cleaner on a soft cloth. Gently wipe the sensor window.
Do not spray glass cleaner directly on the surface of the
sensor window.
Wiper Activated Headlamps
This feature activates the headlamps and parking lamps
after the windshield wipers are turned on and have
completed eight wipe cycles within four minutes.
When the ignition is turned to LOCK/OFF, the
wiper-activated headlamps immediately turn off.
The wiper-activated headlamps also turn off if the
windshield wipers are turned off.
3-32

Headlamps on Reminder
A warning chime will sound if the exterior lamp control
is left on in either the headlamp or parking lamp position
and the driver’s door is opened with the ignition off.
Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the day.
Fully functional daytime running lamps are required
on all vehicles rst sold in Canada.
The DRL system makes the turn signal lamps come on
when the following conditions are met:
It is still daylight and the ignition is on.
The exterior lamp control is in the off position.
The transmission is not in P (Park)
(United States only).
The light sensor is covered or not detecting light.
See “Sensors” underDual Climate Control System
on page 3-40.
When DRL are on, no other exterior lamps such as the
parking lamps, taillamps, etc. will be on when the DRL
are being used. The instrument panel will not be lit
up either.When automatic lighting is on and it is dark enough
outside, the turn signal lamps turn off and normal
low-beam headlamp operation occurs.
When automatic lighting is on and it is bright enough
outside, the regular lamps go off, and the DRL takes over.
If the vehicle is started in a dark garage, the automatic
headlamp system comes on immediately. Once you
leave the garage, it will take approximately one minute
for the automatic headlamp system to change to DRL if
there is light outside. During that delay, the instrument
panel cluster may not be as bright as usual. Make sure
the instrument panel brightness knob is in the full bright
position. SeeInstrument Panel Brightness on page 3-34.
Turning on automatic lighting or the headlamps will
deactivate the DRL. If the parking lamps or the fog lamps
were turned on instead, the DRL will still deactivate.
To idle the vehicle with the DRL off at night, turn off
automatic lighting and shift the transmission into P (Park).
Placing the vehicle in P (Park) disables the DRL. The
DRL will stay off until the vehicle is shifted out of P (Park).
To drive the vehicle with the DRL off, turn off automatic
lighting and manually turn on the parking lamps or
fog lamps, if the vehicle has them.
The regular headlamp system should be turned on
when needed.
3-33

Courtesy Lamps
The courtesy lamps are located on the headliner above
the rear seat. These lamps come on by turning the
instrument panel brightness knob fully clockwise or when
any door is opened and it is dark outside. Puddle lamps
are located on the bottom of the front and rear door trim.
Professional vehicles have an additional dome lamp
and also opera lamps.
Entry Lighting
This feature turns on the courtesy lamps and the
backlighting for the door switches and the exterior lamp
control when a door is opened or if the remote keyless
entry transmitter unlock button is pressed. If activated
due to the transmitter, the lighting remains active for
about 40 seconds. Since the entry lighting system
uses the light sensor, it must be dark outside in order
for the courtesy lamps to turn on. The courtesy lamps
turn off approximately 25 seconds after the last door is
closed. They will dim to off if the ignition key is turned to
ON/RUN, or immediately deactivate if the power locks
are activated.
Parade Dimming
This feature prohibits dimming of the digital displays and
backlighting during daylight hours when the key is in
the ignition and the headlamps are on. This feature is
fully automatic. When the light sensor reads darkness
outside and the parking lamps are active, the digital
displays can be adjusted by turning the instrument panel
brightness knob counterclockwise to dim and clockwise
to brighten lighting.
Reading Lamps
The reading lamps are located on the overhead console
on the headliner and in the rear door opening. These
lamps come on automatically when any door is opened
and it is dark outside.
For manual operation, press the button to turn them on.
Press it again to turn them off.
If the reading lamps are left on, they automatically shut
off 10 minutes after the ignition has been turned off.
3-35

Automatic Operation
AUTO9(Automatic Fan):When this position is
selected on the fan control, the system adjusts the
fan speed. If the OnStar
®system is activated when
this position is selected, the climate control fan speed
will lower.
AUTO (Automatic Mode):
1. Turn the fan control to the AUTO position.
2. Turn the mode control to the AUTO position.
3. Adjust the temperature to a comfortable setting
between 68°F (21°C) and 78°F (26°C).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or cool
any faster. In cold weather, the system will start at
reduced fan speeds to avoid blowing cold air into
the vehicle until warmer air is available. The system
starts out blowing air at the oor but may change
modes automatically as the vehicle warms up to
maintain the chosen temperature setting. The length
of time needed to warm the interior depends on the
outside temperature and temperature of the vehicle.
4. Wait 20 to 30 minutes for the system to stabilize
in order for the system to regulate automatically.
Then adjust the temperature as necessary to
nd your comfort setting.Do not cover the solar sensor located in the center of
the instrument panel near the windshield. For more
information on the solar sensor, see “Sensors” later
in this section.
After the vehicle is started, the display shows the
interior temperature settings and the outside
temperature.
If the AUTO position is selected on the fan or mode
control, the system automatically controls the air
conditioning compressor. The A/C compressor will
run automatically even at cool outside temperatures
in order to dehumidify the air. The A/C indicator light
is lit when the system is operating automatically, even
at near freezing outside temperatures. Press
#on the
fan control to turn off the A/C. For improved window
clearing performance in defog or defrost modes, the
A/C compressor runs automatically.
h(AUTO RECIRCULATION):If the AUTO position is
selected on either the fan or mode control, the system
automatically controls the air inlet to supply fresh outside
air or recirculate the interior air to cool the car faster.
The light on the recirculation button will come on when
the system changes to recirculation. Outside air can be
forced by pressing
hwhen the light is lit. For vehicles
without rear climate controls, press
:to force outside
air. The next time AUTO fan or mode is selected, the air
inlet will reset back to AUTO operation.
3-41

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
<(Rear Defogger):Press to turn the rear window
defogger on or off. Be sure to clear as much snow from
the rear window as possible. The rear window defogger
will turn off approximately 20 minutes after the button is
pressed if the vehicle is moving at slower vehicle speeds.
At higher vehicle speeds, the rear defogger may stay on
continuously. Each additional press will run the defogger
for approximately 10 minutes.
The heated outside rearview mirrors will turn on to help
clear fog or frost from the surface of the mirror when
the rear window defogger is on.
Notice:Do not use a razor blade or sharp object
to clear the inside rear window. Do not adhere
anything to the defogger grid lines in the rear glass.
These actions may damage the rear defogger.
Repairs would not be covered by your warranty.
Sensors
The solar sensor, located in the defrost grille, middle
of the instrument panel, monitors the solar radiation.
Do not cover the solar sensor or the system will not
work properly.
3-44