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Collision warning – troubleshooting
Fault tracing and actions
If the message Windscreen Sensors
blocked is displayed, this means that the
camera is obscured and cannot detect pedestrians, cyclists, vehicles or road marker lines in front of the vehicle. This, in turn, means that Pedestrian and Cyclist Detection with Full Auto Brake, DriverAlert Control, Lane Departure Warning or
Lane Keeping Aid will not have full functional-ity. The table lists possible causes for this mes- sage 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 camera.
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 regis- ter visibility.
The surface between the inside of the windshield and the camera is dirty.Contact an authorized Volvo retailer or service technician to have this surface cleaned. 

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Collision warning – symbols and messages
The table lists possible causes for collision warning-related messages being displayed,and suitable actions.A text message can be erased by pressingbriefly on the 
OK button on the turn signal
lever.
SymbolMessageDescription
Collis'n warning OFFPedestrian and Cyclist Detection with Full Auto Brake is switched off. This message is displayed when the engine is started and will disappear after approx. 5 seconds. It can also be erased by pressing the  OK but-
ton.
Collision Warning UnavailablePedestrian and Cyclist Detection with Full Auto Brake cannot be activated. This message is displayed when the driver attempts to activate the function. It will disappear after approx. 5 seconds or can be erased bypressing the  OK button.
Auto braking was activatedAuto-braking has been active. This message can be erased by pressing the  OK button.
Windscreen Sen- sors blockedThe camera is temporarily not functioning. This message is displayed if the camera is obstructed by snow, ice, dirt, etc., on the windshield. Clean the area of the windshield in front of the camera, see The camera’slimitations (p. 212) for more information on the camera’s limitations.
Radar blocked See manualPedestrian and Cyclist Detection with Full Auto Brake is temporarily not functioning. The radar sensor is blocked, for example by heavy rain or snow that has accumulated in front of the sensor, and cannot detectother vehicles, see Adaptive Cruise Control – limitations (p. 188) for more information on the radar sensor’slimitations.
Collision warn. Service requiredPedestrian and Cyclist Detection with Full Auto Brake is partially or completely not functioning. Contact a trained and qualified Volvo service technician if the message remains in the display. 

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Driver Alert Control (DAC) – symbols and messages
Depending on the situation, DAC may display certain symbols and text messages in theinstrument panel or center console screen.
Symbols and messages
Instrument panel
SymbolMessageDescription
Driver Alert Time for a breakThe vehicle has been driven erratically. The driver receives an audible signal and a text message.
Windscreen Sensors blockedThe camera is temporarily not functioning, due to snow, ice, or dirt on the windshield. Clean the area of the windshield in front of the camera. See The camera’s limitations (p. 212) for information on the cam-era’s limitations.
Driver Alert Sys Service requiredThe system is not functioning. Contact a trained and qualified Volvo service technician if the message remains in the display. 

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Lane Departure Warning (LDW) – symbols and messages
Symbols and messagesA text message can be erased by pressing briefly on the OK button on the turn signal
lever.
SymbolMessageDescription
Lane departure warning ON/Lane departure warning OFFThe function is switched on or off. The text disappears after 5 seconds.
-Lane Depart Warn AvailableThe function is monitoring the road’s marker lines.
-Lane Depart. Warning Unavailable at this speedThe function has gone into standby mode because the vehicle's speed is below 40 mph (65 km/h).
-Lane Depart Warn Unavaila- bleThe road lacks clear marker lines or the camera is not functioning properly. See The camera’s limitations (p. 212) for information on the camera’s limitations.
Windscreen Sensors blockedThe camera is temporarily not functioning, due to snow, ice, or dirt on the windshield. Clean the area of the windshield in front of the camera. See The camera’s limitations (p. 212) for informationon the camera’s limitations.
Driver Alert Sys Service requiredThe system is not functioning. Contact a trained and qualified Volvo service technician if the mes- sage remains in the display. 

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Lane Keeping Aid (LKA) – symbols and messages
A text message can be erased by pressing briefly on the OK button on the turn signal
lever.
SymbolMessageDescription
-Lane Keeping Aid Unavailable
at this speedThe function has gone into standby mode because the vehicle's speed is below 40 mph (65 km/h).
-Lane Keeping Aid Unavailable
for current markingsThe road lacks clear marker lines or the camera is not functioning properly. See The camera’s limitations (p. 212) for information on the camera’s limitations.
-Lane Keeping Aid AvailableThe function is monitoring the road’s marker lines.
Windscreen sensors blocked See manualThe camera is temporarily not functioning, due to snow, ice, or dirt on the windshield. Clean the area of the windshield in front of the camera. See The camera’s limitations (p. 212) for informa-tion on the camera’s limitations.
Lane Keeping Aid Service requiredThe system is not functioning. Contact a trained and qualified Volvo service technician if the message remains in the display.
Lane Keeping Aid InterruptedThe function has gone into standby mode. The lines in the LKA symbol in the instrument panel will indicate when the function is active again.
Related information
• Driver Alert System (p. 217)
• Lane Keeping Aid (LKA) – introduction (p. 227)
• Lane Keeping Aid (LKA) – operation(p. 228) •
Lane Keeping Aid (LKA) – limitations(p. 230) 

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* Option/accessory, for more information, see Introduction.239
Park Assist Pilot (PAP)* – limitations
The PAP parking procedure will be cancelled if.
• The vehicle's speed goes above approxi- mately 4 mph 7 km/h
• The driver moves the steering wheel
• If the stability or ABS systems are acti-vated (e.g., if a wheel starts to spinbecause of a slippery road surface
If the system has been switched off, this will be indicated by a text message in the instru-ment panel.
NOTE
• PAP will not function correctly if its sensors are obstructed by dirt, snow,etc.
• In certain situations, PAP may not beable to measure a parking space. Thiscould be due to external sources ofsound (e.g., a vehicle's horn, tires onwet asphalt, pneumatic brakes, noisefrom a motorcycle's exhaust, etc.)emitting ultrasound using approxi-mately the same frequencies as PAP.
Information to keep in mindPAP is only intended to provide parallel park- ing assistance but may not be able to func-tion fully in all situations. •
PAP's function is based on the way that the vehicles are parked behind and infront of your parking space. If they are,for example, parked too close to the curb,there is a risk that your vehicle's tires orwheel rims could be damaged by thecurb during the parking procedure.
• PAP is intended to provide parking assis-tance on straight streets, not sections ofstreet with curved or irregular curbs. Besure that your vehicle is parallel to thecurb when PAP measures the parkingspace.
• PAP may not be able to provide parkingassistance on narrow streets due to lackof space to maneuver the vehicle. In sit-uations like this, it may help to drive asclose to the side of the road as possiblewhere the parking space is located.
• Use only approved tires with the correctinflation pressure because this affectsPAP's capacity to provide parking assis-tance. See the table in Tire inflation –pressure table (p. 305). Changing to adifferent approved tire size may affectPAP's parameters. Consult a trained andqualified Volvo service technician.
• Heavy rain or snow may inhibit PAP'scapacity to correctly measure a parkingspace.
• Do not use PAP if snow chains or a tem-porary spare tire is being used.
• Do not use PAP if there are any objectsprotruding from the vehicle.
WARNING
• The front end of your vehicle may turn out toward oncoming traffic during theparking procedure.
• Objects located above the parkingsensors' field of vision are not includedwhen PAP measures a parking space.For this reason, PAP may turn into theparking space too soon. Avoid parkingspaces of this type.
• The driver is always responsible fordetermining if PAP has selected a suit-able parking space.
Maintenance
Generic illustration. The PAP sensors are located in the front and rear bumpers
PAP uses the same sensors as the Park assist system, see Park assist – limitations(p. 235)).  

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240* Option/accessory, for more information, see Introduction.
The sensors must be cleaned regularly to ensure that they work properly. Clean themwith water and a suitable car washing deter-gent.
Related information
• Park Assist Pilot (PAP)* – introduction (p. 236)
• Park Assist Pilot (PAP)* – function (p. 236)
• Park Assist Pilot (PAP)* – operation(p. 237)
• Park Assist Pilot (PAP)* – symbols andmessages (p. 240)
• Park assist – introduction (p. 232)
• Rear Park Assist Camera (PAC) – intro-duction (p. 241)
Park Assist Pilot (PAP)* – symbols and messages
Various PAP-related combinations of sym- bols, graphics and text messages are dis-played in the instrument panel and some-times also include suitable actions. A text message can be erased by pressing briefly on the 
OK button on the turn signal
lever. Contact a Volvo retailer or a trained and qualified Volvo service technician If a mes-sage indicating that PAP is not functioningproperly is displayed.
Related information
• Park Assist Pilot (PAP)* – introduction (p. 236)
• Park Assist Pilot (PAP)* – function (p. 236)
• Park Assist Pilot (PAP)* – operation(p. 237)
• Park Assist Pilot (PAP)* – limitations(p. 239)
• Park assist – introduction (p. 232)
• Rear Park Assist Camera (PAC) – intro-duction (p. 241)
Park assist – troubleshooting
Faults in the systemIf the information symbol illuminates andPark assist syst Service required is shown
on the information display, this indicates that the system is not functioning properly andhas been disengaged. Consult a trained andqualified Volvo service technician.
CAUTION
In certain circumstances, the park assist system may give unexpected warning sig-nals that can be caused by external soundsources that use the same ultrasound fre-quencies as the system. This may includesuch things as the horns of other vehicles,wet tires on asphalt, pneumatic brakes,motorcycle exhaust pipes, etc. This doesnot indicate a fault in the system.
Related information
• Park assist – introduction (p. 232)
• Park assist – limitations (p. 235)
• Park assist – function (p. 232)
• Park assist – operation (p. 234)
• Rear Park Assist Camera (PAC) – function (p. 241) 

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250* Option/accessory, for more information, see Introduction.
BLIS* – messages
If BLIS/CTA 18
 are not functioning normally, a
symbol will illuminate in the instrument panel and a text message will be displayed. Followany instructions that may be provided. These messages include:
MessageSystem status
CTA OFFCTA has been switched off manually. BLIS remainsactive.
BLIS and CTA OFFTrailerattachedBLIS and CTA are tempo- rarily deactivated becausea trailer's wiring has beenconnected to the vehicle'selectrical system.
BLIS and CTA Serv-ice requiredBLIS and CTA are not functioning normally.
• If this message recurs, the systems should beinspected by a trainedand qualified Volvoservice technician.
Messages can be erased by pressing the 
OK
button on the left steering wheel lever.
Related information
• BLIS* – introduction (p. 245)
• BLIS* – function (p. 246)
• BLIS* – operation (p. 247)
• BLIS* – Cross Traffic Alert (CTA) (p. 247)
• BLIS* – limitations (p. 249)
18
Cross Traffic Alert