2017 VOLVO S60 brake sensor

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Adaptive Cruise Control – troubleshooting
If the message Radar blocked See manual is
displayed, this means that the radar signals from the sensor have been obstructed and that a vehi- cle ahead cannot be detected. This, in turn, means that the functions of the ACC, Distance Alert, and Collision Warning Sys-
tem with Auto-brake and Pedestrian Detectionwill not function. The table lists possible causes for this message being displayed, and suitable actions.
CauseAction
The surface of the radar in the grille is dirty or obstructed in some way.Clean the radar surface, or remove the object causing the obstruction.
Heavy rain or snow is interfering with the radar signals.No action possible. Heavy precipitation may affect the function of the radar.
Swirling water or snow from the surface of the road may interfere with the radar signals.No action possible. A very wet or snow-covered road surface may affect the function of the radar.
The surface of the radar is clean but the message remains in the display.Wait a short time. It may take several minutes for the radar to detect that it is no longer obstructed.
Related information
•
Adaptive Cruise Control – introduction (p. 176)

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City Safety – symbols and messages (p. 200)
• City Safety – Laser sensor (p. 201)
City Safety – function
Function
Location of the laser sensor in the windshield 5
City Safety
™ monitors traffic ahead of you using
a laser sensor mounted in the upper section of the windshield. If a collision is imminent, City Safety ™ will automatically apply the brakes,
which may feel like hard braking. If the difference in speed between your vehicle and the vehicle ahead is more than approximately 9 mph (15 km/h), City Safety ™ alone cannot
prevent a collision from taking place. The driver must apply the brakes to help avoid a collision orreduce its effect. When the function activates and applies the brakes, a message will appear in the information display to indicate that the system is/has beenactive.
NOTE
•
When City Safety
™ applies the brakes,
the brake lights will illuminate.
• In cases where City Safety
™ has stopped
the vehicle, the system will then release the brakes. The driver must apply thebrakes to keep the vehicle at a standstill.
Related information
• City Safety – introduction (p. 195)
• City Safety – operation (p. 197)
• City Safety – limitations (p. 197)
• City Safety – troubleshooting (p. 198)
• City Safety – symbols and messages (p. 200)
• City Safety – Laser sensor (p. 201)
5
The illustration is generic; certain details may vary from model to model

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City Safety – symbols and messages
Symbols and messages in the display
When City Safety™ automatically applies the
brakes, one or more of the symbols in the main instrument panel may illuminate and its associ- ated message will be displayed. A text message can be erased by pressing briefly on the
OK button on the turn signal lever.
SymbolMessageMeaning/action required
Auto braking by City SafetyCity Safety ™ is applying/has applied the brakes automatically.
Windscreen Sensors blockedThe laser sensor is temporarily not functioning due to an obstruction.
• Remove the obstruction and/or clean the windshield in front of the sensor(s).
For more information on the sensor

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
204
Collision warning * – function
Function overview
Audio-visual warning signals, collision risk
Radar sensor
Camera
Collision WarningThe radar sensor and the camera work together to detect a pedestrian, a cyclist, stationary vehi-cles and vehicles that are moving in the samedirection as your vehicle. If there is a risk of colli-sion with a vehicle, a cyclist or a pedestrian, thedriver is alerted by a flashing red warning lightand an audible warning signal. The system isactive at speeds above 3 mph (4 km/h).
Brake SupportIf the risk of collision continues to increase afterthe collision warning has been given, Brake Sup-port is activated. Brake Support prepares thebrake system to react quickly, and the brakes areapplied slightly. This may be experienced as alight tug. If the brakes are applied quickly, full braking effect will be provided. Brake Support alsoincreases brake force if the system determinesthat the driver has not applied adequate pressureon the brake pedal.
Auto-brakeIf a collision is imminent and the driver has notapplied the brakes or begun to steer around thevehicle, pedestrian or a cyclist, the auto-brakefunction is activated without the driver pressingthe brake pedal. Full brake force is applied tohelp reduce the vehicle

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* Option/accessory, for more information, see Introduction.209
WARNING
•In certain situations, the system cannot provide warnings or warnings may bedelayed if traffic conditions or other exter-nal factors make it impossible for theradar sensor or camera to detect apedestrian, a cyclist or a vehicle ahead.
• Warnings may not be provided if the dis-tance to the vehicle ahead is short, or ifmovements of the steering wheel/brakepedal are great, such as during activedriving.
• The sensor system has a limited range forpedestrians/cyclists and provides warn-ings and braking effect most effectively atspeeds up to 30 mph (50 km/h). For sta-tionary or slow-moving vehicles, the sys-tem functions best if your vehicle

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Collision warning – troubleshooting
Fault tracing and actionsIf the message Windscreen Sensors blockedis displayed, this means that the camera isobscured and cannot detect pedestrians, cyclists, vehicles or road marker lines in front of the vehi-cle. This, in turn, means that Pedestrian and Cyclist Detection with Full Auto Brake, Driver Alert Con-trol, Lane Departure Warning or Lane KeepingAid will not have full functionality. The table lists possible causes for this message being displayed, and suitable actions.
CauseAction
The surface of the windshield in front of the camera is dirty or covered with ice or snow.Clean or clear the section of the windshield in front of the camera.
Fog, heavy rain or snow is interfering with the function of the camera.No action possible. Heavy precipitation may affect the function of the cam- era.
The surface of the windshield is clean but the message remains in the display.Wait a short time. It may take several minutes for the camera to register vis- ibility.
The surface between the inside of the windshield and the camera is dirty.Contact an authorized Volvo retailer or service technician to have this sur- face cleaned.

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* Option/accessory, for more information, see Introduction.233
Front park assist
The distance monitored in front of the vehicle is approximately 2.5 ft (0.8 m). The audible signalcomes from the audio system's front speakers. It may not be possible to combine auxiliary head- lights and front park assist since these lightscould trigger the system's sensors.
NOTE
Front park assist is deactivated when the parking brake is applied and or when the gear selector is in the P position.
Related information
• Park assist – introduction (p. 231)
• Park assist – limitations (p. 234)
• Park assist – operation (p. 233)
• Park assist – troubleshooting (p. 239) •
Rear Park Assist Camera (PAC) – function (p. 240)
Park assist – operation
Function
Park assist and CTA
* button
The system is activated automatically when the vehicle is started. The indicator light in the buttonin the center console illuminates when the sys-tem is on. • The front park assist system is active from the time the engine is started until the vehi-cle exceeds a speed of approximately 6 mph(10 km/h). It is also active when the vehicleis backing up.
• Rear park assist is active when the engine isrunning and reverse gear has been selected.

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Activating/deactivating
The system is activated automatically when the vehicle is started.
–Press the Park assist button on the center console to temporarily deactivate the sys-tem(s).
> The indicator light in the button will go outwhen the system has been deactivated.
Park assist will be automatically reactivated the next time the engine is started, or if the button ispressed (the indicator light in the button will illu-minate).
NOTE
Park assist is disengaged automatically when the parking brake is applied.
Related information
• Park assist – introduction (p. 231)
• Park assist – limitations (p. 234)
• Park assist – function (p. 231)
• Park assist – troubleshooting (p. 239)
• Rear Park Assist Camera (PAC) – function (p. 240)
Park assist – limitations
Cleaning the sensorsThe sensors must be cleaned regularly to ensure that they work properly. Clean them with waterand a suitable car washing detergent.
Location of the front sensors
Location of the rear sensors
Ice and snow covering the sensors may cause incorrect warning signals.
NOTE
If the sensors are obstructed by e.g., dirt, snow, or ice, this could result in false warningsignals from the park assist system or thesystem may not function at all.
Related information
•Park assist – introduction (p. 231)
• Park assist – function (p. 231)
• Park assist – operation (p. 233)
• Park assist – troubleshooting (p. 239)
• Rear Park Assist Camera (PAC) – function (p. 240)