2017 VOLKSWAGEN TOUAREG radar 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
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.

If no other vehicle is detected by the Side Assist system in the critical area of your vehicle, the indica-
tor lights in the outside mirrors will not light up ⇒ .
The closer the detected vehicle is to your vehicle, the more indicator lights light up in the outside mirrors. If the approaching vehicle is very close, 4 indicator lights light up.
WARNING
Failure to heed warning lights and instrument cluster text messages can cause the vehicle to break down in traffic and result in a collision and serious personal injury.
x Never ignore warning lights or text WARNINGS.
x Always stop the vehicle as soon as it is safe to do so.
NOTICE
Failure to heed warning lights or text WARNINGS can result in vehicle damage.
How Side Assist works

Fig. 280 In the outside mirrors: Side Assist indicator lights

Fig. 281 Rear view of the vehicle: Areas of the Side Assist radar sensors.

does not work below speeds of about 20 mph (30 km/h). If Side Assist detects one or more vehicles in the monitored area, indicator lights light up in the outside mirrors.
Indicator lights in the outside mirrors
The indicator lights ⇒ fig. 280 in the outside mirrors inform you about the traffic behind your vehicle.
The indicator lights in the left outside mirror ⇒ fig. 280 inform you about traffic on the left side and the
indicator lights in the right outside mirror ⇒ fig. 280 inform you about the traffic on the right side of your vehicle.

Indicator lights in the out-
side mirror
Possible cause
Stay off. No other vehicle detected by Side Assist in
the critical area of your vehicle.
Light up briefly once. Side Assist is switched on and is ready.
Light up. Side Assist detected a possible critical situ-
ation.
Repeatedly light up brightly. The turn signal is switched on and Side
Assist detected a possible critical situation
on the corresponding vehicle side ⇒  in
Warning and indicator lights

Radar sensors
The Side Assist radar sensors are located on the left and right side above the rear bumper ⇒ fig. 281. They cover an area of about 50 m (160 ft) behind your vehicle as well as the blind spots on the left and right vehicle side. On the left and right side of your vehicle Side Assist covers an area of about the width of one driving lane.
However, Side Assist does not recognize the exact width of the driving lanes next to your vehicle. In some cases, such as driving in the middle of 2 lanes or with very narrow lanes, this can lead to an incorrect indication. In other cases, vehicles moving on further driving lanes like the second to left lane, or even fixed objects, such as guide rails, can cause the indicator lights to light up.