2009 CADILLAC XLR brake sensor

How the System Works
URPA comes on automatically when the shift lever is
moved into R (Reverse). The rear display briey
illuminates to indicate the system is working.
URPA operates only at speeds less than 3 mph (5 km/h).
If the vehicle is above this speed, the red light on the rear
display will ash.
To be detected, objects must be at least 10 inches
(25.4 cm) off the ground and below trunk level. Objects
must also be within 5 feet (1.5 m) from the rear bumper.
This distance may be less during warmer or humid
weather.
A single beep will sound the rst time an object is
detected between 20 inches (0.5 m) and 5 feet (1.5 m)
away. Beeping will occur when the vehicle is closer
than 20 inches (0.5 m) from the object.
The following describes what will occur with the URPA
display as the vehicle gets closer to a detected object:
Description English Metric
amber light 5 ft 1.5 m
amber/amber lights 40 in 1.0 m
amber/amber/red
lights/continuous beep20 in 0.5 m
amber/amber/red
lights ashing and
continuous beep1 ft 0.3 m
When the System Does Not Seem to
Work Properly
If the URPA system will not activate due to a temporary
condition, a red light will be shown on the rear URPA
display when the shift lever is moved into R (Reverse).
This occurs under the following conditions:
The ultrasonic sensors are not clean. Keep the
vehicle’s rear bumper free of mud, dirt, snow,
ice and slush. For cleaning instructions, see
Washing Your Vehicle on page 6-77.
An object was hanging out of the trunk during the
last drive cycle. Once the object is removed,
URPA will return to normal operation.
The vehicle’s bumper is damaged. Take the vehicle
to your dealer/retailer to repair the system.
Other conditions may affect system performance,
such as vibrations from a jackhammer or the
compression of air brakes on a very large truck.
If the system is still disabled after driving forward at
least 15 mph (25 km/h), take the vehicle to your
dealer/retailer.
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NO FOB, OFF OR RUN?
This message displays when a keyless access
transmitter is not detected inside the vehicle while
you are trying to turn the ignition off. The vehicle may
be near a strong radio antenna signal causing the
keyless access system to be jammed. The vehicle will
remain in ACCESSORY until the vehicle is turned off or
is restarted, or ve minutes has expired. If you turn
the ignition off and you cannot nd the keyless access
transmitter, you will not be able to restart the vehicle.
The keyless access transmitter needs to be inside of the
vehicle in order for the vehicle to start. SeeStarting
the Engine on page 2-26for more information.
OVER SPEED WARNING
This message displays when the vehicle speed exceeds
a certain limit as required by some export countries.
A chime sounds when this message is displayed.
PRESS BRAKE TO START
This message displays to inform you that the brake
pedal must be applied to start the vehicle. Make sure
you are pressing the brake pedal all the way down.
REDUCED ENGINE POWER
This message displays when the vehicle is reducing
engine power because the transmission is being placed
in gear under conditions that may cause damage to the
vehicle’s engine, transmission, or ability to accelerate.
Reduced engine power can affect the vehicle’s ability to
accelerate. If this message is on, 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 this message is on, but acceleration and speed may
be reduced. Anytime this message stays on, the vehicle
should be taken to your dealer/retailer for service as soon
as possible.
RIGHT DOOR AJAR
This message displays anytime the engine is running,
the transmission is not in P (Park), and the passenger
door is open or ajar. A chime sounds if the vehicle’s
speed is greater than 3 mph (5 km/h).
SERVICE A/C
This message displays when the electronic sensors that
control the air conditioning and heating systems are
no longer working. Have the climate control system
serviced by your dealer/retailer if you notice a drop in
heating and air conditioning efficiency.
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Fuses Usage
CLSTR/HUDInstrument Panel Cluster, Heads-up
Display (HUD)
COLUMN LK
MDLNot Used
DECK LID
CLOSE/PRK/
BRK BTrunk Close Button, Parking Brake
Solenoid B
DR LOCKS Door Locks
ECM Engine Control Module
EMPTY Not Used
EMPTY Not Used
EMPTY Not Used
EMPTY Not Used
EMPTY Not Used
FOLDING
TOP/TRUNK
LATCHRetractable Hardtop, Trunk Latch
FUSE PULLER Fuse Puller
GMLAN
DEVICESGMLAN Devices
HTD STR WHL Heated Steering Wheel
HTD/SEAT LH Driver Side Heated Seat
HTD/SEAT RH Passenger Side Heated Seat
HVAC/PWR
SNDClimate Control System, Power
SounderFuses Usage
IGN SW/INTR
SNSRIgnition Switch, Intrusion Sensor
INTERIOR
LIGHTSInterior Lights
ISRVM/HVACInside Rearview Mirror, Climate
Control System, Column Lock,
Power Sounder
ONSTAR OnStar
®
PRK/BRK
SOL AParking Brake Solenoid A
PWR FLDG
MIR-EXT/RETPower Folding Mirror
PWR LUMBAR
LH/RHPower Lumbar
RADIO/S-BAND/
VICSRadio, S-Band, CD Changer
REAR
FOG/ALDLRear Fog Lamps, Diagnostic Link
Connector
REVERSE
LAMPReverse Lamp
REVERSE
LAMPSReverse Lamps
RPA/H/C
SEAT/WPR
RELAYSRear Park Aid, Heated/Cooled
Seats, Windshield Wiper Relays
RUN/ACSRY
PWRRun, Accessory Power
6-85

Fuses Usage
4 Windshield Wipers
5 Stop/Back-Up Lamps
6 Oxygen Sensor
7 Battery 5
8 Parking Lamps
9 Electronic Throttle Control
10 Fuel Pump
11 Antilock Brake System
12 Odd Injectors
13 Electronic Suspension Control
14 Emission Controls
15 Air Conditioning Compressor
16 Even Injectors
17Windshield Washer, Adaptive
Forward Lighting System (AFS),
Intercooler Pump
18 Headlamp WasherFuses Usage
19 Right Low Beam Headlamp
20 Not Used
21 Left Low Beam Headlamp
22 Fog Lamp
23 Right High Beam Headlamp
24 Left High Beam Headlamp
25 Cooling Fan
26 Battery 3
27 Antilock Brakes
28 Climate Controls
29 Battery 2
30 Starter
31 Audio Amplier
32 Not Used
33 Battery 1
48 Spare
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