2011 VOLKSWAGEN TOUAREG brake sensor

Vehicles with oversize loads
Under certain circumstances vehicles carrying oversize loads or loads that exceed the vehicle dimen-sions, like flat-bed trailer trucks, can't be recognized correctly by the ACC. Switch off ACC when driving behind such vehicles.
Other vehicles changing lanes
Vehicles that change into your lane within a short distance can only be detected by the radar sensor
once they are within sensor range ⇒ fig. 278 (C). The result is a delayed reaction by the Adaptive Cruise Control.
Stationary vehicles
If a vehicle detected by Adaptive Cruise Control turns or changes lanes and there is a stationary vehicle in front of that vehicle, the system will not react to the stationary vehicle (D).
Narrow vehicles
Narrow vehicles, such as motorcycles traveling ahead, are often detected late or not at all under some circumstances.
Oncoming vehicles
ACC does not detect oncoming vehicles on your lane.
Metal objects on the road
Metal objects on the road, such as tracks, can cause irritations for the ACC due to falsely reflected radar signals and therefore lead to unwanted reactions of the system, such as abrupt braking maneu-vers.
Radar sensor impaired by rain and dirt
If the radar sensor function is impaired by heavy rain, spray, snow or mud, Adaptive Cruise Control switches off temporarily. ACC not available. No sensor view! appears in the instrument cluster display.
When Adaptive Cruise Control is reactivated after this message is displayed, it functions like a “stand-ard” cruise control system. It maintains the set speed but it does not regulate the distance to the vehicle ahead.
Overheated brakes
Adaptive Cruise Control may switch off temporarily if the brakes overheat significantly, for example from braking maneuvers or driving down steep slopes. ACC not available appears in the instru-ment cluster display. Adaptive Cruise Control cannot be activated.
Adaptive Cruise Control can be activated again once the temperature of the brakes decreases suffi-ciently. The message ACC not available in the instrument cluster switches off.
If the message ACC not available does not switch off, there is a malfunction. Contact your au-thorized Volkswagen dealer.
Trailer towing
When towing a trailer, ACC and the Forward Collision Warning system (Front Assist) may work only with limited functionality.
Text messages in the instrument cluster display

Text message Meaning

Text message Meaning
ACC not avail-
able.
ACC and/or the Forward Collision Warning system
(Front Assist) are disabled due to a system malfunc-
tion or soiled/misaligned sensors.
ACC and Front
Assist are not
available.
ACC not avail-
able. No sen-
sor view!
The sensors are soiled and the sensor view is im-
paired. Clean the sensors.
ACC and Front
Assist are not
available. No
sensor view!
ACC is cur-
rently not
available.
Gradient is
too large.
The highest possible gradient of 19% for ACC to
work properly is exceeded or the vehicle is rolling
backwards. ACC is deactivated.
ACC is only
available in
driving level
D, S or M.
Shift to selector lever position D, S or M (Tiptronic
mode).
ACC: Release
parking brake!
ACC is deactivated when the electronic parking
brake is engaged.
ACC is cur-
rently not
available. HDC
activated.
The OFF-ROAD mode is switched on and the Hill
descent assist is activated. ACC is deactivated au-
tomatically. In order to enable ACC, switch off the
OFF-ROAD mode.
ACC: Stabili-
zation control
(ESC) inter-
vention.
The Electronic Stabilization Control (ESC) is current-
ly working and ACC is temporarily deactivated.

Text message Meaning
ACC: Not
available.
Please manual-
ly accelerate
and brake.
ACC is not available. Driver intervention is neces-
sary.
Door open. ACC cannot be activated. Please close all doors and
engine hood.
Object ahead. A stationary object is detected ahead when ACC is
switched on and your vehicle is moving. ACC cannot
be activated.
Front Assist
deactivated.
Front Assist is deactivated.

WARNING
The view of the radar sensor can be impaired by rain, snow or heavy spray. Under certain circumstances, this could result in the vehicle ahead being detected inadequately or not at all. Take over yourself if necessary!
x Switch Adaptive Cruise Control off when driving through tunnels because the function of the system could be impaired.
x
x Adaptive Cruise Control distance regulation will not work if the sensors are covered by heavy rain, spray, snow, etc. ACC not available. No sensor view! appears in the in-strument cluster display.
x Adaptive Cruise Control switches off temporarily if the brakes overheat too much. ACC not available appears in the instrument cluster display.

In order to Operation
OR: If the vehicle rolls backwards.
Automatically
deactivate
the PDC:
Drive forward faster than about 5 – 10 mph (10 – 15 km/h).
OR: Shift into Reverse R.
Switch to full-
screen view:
Vehicle rolls backwards slowly.
OR: Press the lit-up button  or ∗.
OR: Tap the /03 function key ⇒ fig. 299.

The indicator light in the button  ⇒ fig. 298 comes on and stays on as long as the feature is active.
A chime sounds to tell you that the system is on. If the chime does not sound, PDC is not working. Have the system inspected by an authorized Volkswagen dealer or an authorized Volkswagen Service Facility.
Special considerations when using Park Distance Control
x In some cases, the Park Distance Control system interprets water and ice on the sensors as an obstacle. To prevent automatic PDC activation in these cases, you can turn Park Distance Control off
permanently in the Infotainment System ⇒  Automatic activation in the Infotainment System.
x If the distance remains the same, the warning tone volume decreases after a few seconds. If a continuous tone sounds, its volume remains the same.
x If the vehicle moves away from the obstacle, the beeping sound stops automatically. The beep turns on once more automatically if the vehicle approaches the obstacle again.
x There is no beeping when the transmission is in Park (P) or the electronic parking brake is en-gaged.
x The volume of the audible signals can be adjusted by an authorized Volkswagen dealership or an authorized Volkswagen Service Facility.
WARNING
Never rely completely on the PDC for information about people and objects that might be in the way of the vehicle and could be struck by the vehicle causing serious personal injury.
x The PDC sensors have blind spots where they cannot detect people or objects.
x Always watch for people, especially small children and animals, because the sensors may not always be able to detect them.
If you hear a long beep lasting about 3 seconds when you first turn PDC on or the indicator light in the button starts blinking, this means there is a malfunction in the Park Distance Control system. Switch off the Park Distance Control system with the button and have it immediately checked by an authorized Volkswagen dealer or an authorized Volkswagen Service Facility.

WARNING
After the vehicle has been washed, the wet brakes or, in winter, brake discs or pads coated with ice, react slower and need longer stopping distances.
x Always dry the brakes and clean off any ice coatings with a few careful applications of the brake. Make sure not to endanger other motorists or cyclists or disobey legal requirements.
CAUTION
Sharp edges under the vehicle can cut exposed skin.
x Always protect your hands and arms from cuts on sharp metal edges when cleaning the underbody, the inside of the wheel housings, etc.
NOTICE
x The water temperature must not be more than +140 °F (+60 °C).
x To help prevent damage to the paint, do not wash the vehicle in direct sunlight.
x Do not use insect sponges, abrasive kitchen sponges or similar things to clean the vehicle. These can damage the paint finish.
x Never clean headlights with a dry cloth or sponge. Always use a wet cloth or sponge. For best results use soapy water.
x When washing or rinsing the vehicle in cold weather, do not let water get into the lock cylinders or point the hose at gaps around the doors, hood or rear hatch. The water could freeze on the locks and seals and make it difficult to open the vehicle!
NOTICE
To help prevent vehicle damage in a car wash:
x Compare the vehicle track width with the dimensions of the guide rails in the car wash to help prevent damage to wheel rims and tires!
x Switch off the rain sensor before driving through a car wash.
x Make sure there is enough clearance for the height and width of the vehicle.
x To help prevent paint damage to the engine hood, place wiper blades against the windshield after they have dried. Do not let them snap back into place.
x Fold the outside mirrors toward the vehicle body. Do not fold power mirrors manually!
x Lock the rear hatch to prevent unintentional opening in the car wash.
Washing with a power washer

Never use a power washer to clean the engine compartment ⇒  Cleaning the engine compartment.
WARNING
Improper use of power washers can cause serious invisible permanent damage leading to tire failure and loss of vehicle control. This can cause accidents and severe personal injury.
x Keep sufficient distance between water jet and tires. Never wash tires with a nozzle that sprays the water out in a direct stream regardless of the distance to the tire and even for a very short time.
x Never use “dirt blasters.” to clean tires. Even spraying from a relatively long distance for a very short time can do visible or invisible damage to tires.
WARNING
After the vehicle has been washed, the wet brakes or, in winter, brake discs or pads coated with ice, react slower and need longer stopping distances.
x Always dry the brakes and clean off any ice coatings with a few careful applications of the brake. Make sure not to endanger other motorists or cyclists or disobey legal requirements.
NOTICE
x Water temperature should not be more than 140° F (60° C).
x To help prevent damage to the paint, do not wash the vehicle in direct sunlight.
x In order for Park Distance Control to work correctly, the sensors in the bumpers must be kept clean and clear of snow and ice.
x When using a power washer or steam cleaner, only spray the rear assist sensors directly for a short period of time and always keep the nozzle at least 4 inches (10 cm) from the sensor.
x Do not clean icy or snow-covered windows with a power washer.
x When washing or rinsing the vehicle in cold weather, do not let water get into the lock cylinders or point the hose at gaps around the doors, hood or rear hatch. The water could freeze on the locks and seals and make it difficult to open the vehicle!
Cleaning windows and outside mirrors