2017 VOLVO XC90 TWIN ENGINE HYBRID cruise control

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DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.290

WARNING
If ACC changes targets from a moving vehicleto a stationary one at speeds above 20 mph(30 km/h), the system will not react to thestationary vehicle and will accelerate to thepreviously set speed.
The driver must actively apply the brakes toslow/stop the vehicle.

Automatic standby mode when changing
targets
ACC disengages and goes into standby mode if:
•your vehicle's speed goes below approx.3 mph (5 km/h) and ACC cannot determineif the target object is a stationary vehicle orsome other type of object such as a speedbump, etc
•the vehicle's speed goes below approx.3 mph (5 km/h) and the vehicle aheadchanges lanes or turns so that ACC nolonger has a target vehicle to follow.

Auto-hold brake function
In slow-moving, stop-and-go traffic or when stop-ped at a traffic light, driving will resume automati-cally if the vehicle is not stopped for more thanapprox. 3 seconds. If it takes more than3 seconds for the vehicle ahead to begin movingagain, ACC will go into standby mode and theauto-hold brake function will activate.
–The driver will then have to reactivate ACC inone of the following ways:
•Press the button on the left-sidesteering wheel keypad.
•Press the accelerator pedal.
>ACC will resume following the vehicleahead (target vehicle) if it begins to movewithin approx. 6 seconds.
NOTE
ACC can keep the vehicle at a standstill forup to 5 minutes, after which the parking brakewill be set and ACC will go into standbymode.
The parking brake has to be released beforeACC can be reactivated.

Deactivation of the auto-hold brake function
In certain situations, auto-hold will be deactivatedwhen the vehicle is at a standstill and ACC will gointo standby mode.
This means that the brakes will be released andthe vehicle can begin to roll.
The driver must actively apply the brakes to keepthe vehicle at a standstill.
This can occur in the following situations:
•the driver presses the brake pedal
•the parking brake is set
•the gear selector is moved to the P, N or Rpositions
•the driver puts ACC in standby mode.
Automatically setting the parking brake
In certain situations, the parking brake is setautomatically to help keep the vehicle at a stand-still.
This occurs if ACC keeps the vehicle at a stand-still with the brakes and:
•the driver unbuckles the seat belt or opensthe door
•ACC has kept the vehicle at a standstill formore than approx. 5 minutes
•the brakes overheat
•the engine is turned off.

Related information
•Adaptive Cruise Control (ACC)* (p. 281)
•Auto-hold brake function (p. 379)
•Parking brake (p. 382)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.291
Adaptive Cruise Control (ACC) -troubleshooting
If this symbol is displayed in the instru-ment panel and the messageWindscreen sensor Sensorblocked, see Owner's manualappears, the ACC radar sensor is blocked andcannot detect vehicles ahead.
This message also indicates that the followingsystems may have reduced functionality:
•Distance Alert
•City Safety
•Driver Alert Control
•Pilot Assist
•Lane Keeping Aid (LKA)
•Road Sign Information (RSI)
The following table lists possible causes for this message being displayed and suitable actions:
CauseAction
The windshield in front of the radar is dirty or covered with snow/ice.Clean/clear the windshield in front of the radar.
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 theradar signals.No action possible. A very wet or snow-covered road surface may affect thefunction of the radar.
The windshield in front of the radar is clean but the message remains in thedisplay.Wait a short time. It may take several minutes for the radar to detect that it isno longer obstructed.
A text message can be erased by briefly pressingthe O button on the right-side steering wheelkeypad. If the message recurs, contact a trainedand authorized Volvo service technician orretailer.

Related information
•Adaptive Cruise Control (ACC)* (p. 281)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.292
Adaptive Cruise Control (ACC) -limitations
Adaptive Cruise Control (ACC) functionality maybe limited in certain situations.

Steep roads and/or heavy loads
Adaptive Cruise Control is primarily intended foruse on relatively level roads. The function may notbe able to maintain the correct time interval tothe vehicle ahead when driving down steep hills.The driver should be attentive and prepared toapply the brakes in these situations.
Do not use Adaptive Cruise Control when thevehicle is transporting a heavy load or if it is tow-ing a trailer.

Additional information
•The Off Road drive mode cannot beselected if Adaptive Cruise Control is acti-vated.
•Adaptive Cruise Control uses the vehicle'scamera and radar sensor, which have certaingeneral limitations. See the articles "Cameralimitations" and "Radar sensor limitations"for additional information.

Related information
•Adaptive Cruise Control (ACC)* (p. 281)
•Radar sensor limitations (p. 319)
•Camera limitations (p. 323)

DRIVER SUPPORT
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* Option/accessory, for more information, see Introduction.293
Adaptive Cruise Control (ACC)symbols and messages
A number of ACC symbols and/or messagesmay appear in the instrument panel or the head-up display*.
Several examples3 are provided here.
This illustration4 shows that ACC is set at aspeed of 68 mph (110/km/h) and that there isno vehicle ahead to follow.
This illustration4 shows that ACC is set at aspeed of 68 mph (110/km/h) and is followinganother vehicle traveling at the same speed.
The following table lists several ACC-related symbols and messages.
SymbolMessageExplanation
WHITE symbolACC is in active mode and maintaining the set speed.
GRAY symbol and UnavailableACC is in standby mode.
3In the following illustrations, the optional RSI (Road Sign Information) function is indicating that the posted speed limit is 80 mph (130 km/h).4The illustration is generic. 110 km/h is approx. 68 mph.

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DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.294
SymbolMessageExplanation
Adaptive cruise
Service required
The system is not functioning properly. Contact a trained and qualified Volvo Service tech-nician.
Windscreen sensor Sensor blocked, seeOwner's manualClean the windshield in front of the camera/radar sensor.
A text message can be erased by briefly pressingthe O button on the right-side steering wheelkeypad. If the message recurs, contact a trainedand authorized Volvo service technician orretailer.

Related information
•Adaptive Cruise Control (ACC)* (p. 281)
•Road Sign Information (RSI)* (p. 346)

DRIVER SUPPORT
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297

Pilot Assist overview
Controls
Function buttons and symbols
Activates Pilot Assist when the vehicle iskept at a standstill by the auto-hold brakefunction
Press to activate Pilot Assist or put it instandby mode
Change from Pilot Assist to Adaptive CruiseControl (symbol (8) will also change)
Not in use
Increase the distance (time interval) to thevehicle ahead
Change from Adaptive Cruise Control to PilotAssist (symbol (8) will also change)
Reduce the distance (time interval) to thevehicle ahead
Function symbols
Symbols for the time interval and the vehicleahead

Instrument panel
Speed indication
Set speed
Speed of the vehicle ahead
Your vehicle's current speed.
Collision warning
Warning light
Pilot Assist can exert brake force that is equiva-lent to approximately 40% of the vehicle's totalbraking capacity.
In situations requiring more brake force than PilotAssist can provide and if the driver does notapply the brakes, an audible signal from the CitySafety system will sound and warning light willilluminate in the windshield to alert the driver toreact.

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DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.298

Head-up-display *
A flashing symbol alerts the driver
If the vehicle is equipped with a head-up display,a flashing symbol in the windshield will alert thedriver.

NOTE
Strong sunlight, reflections, extreme light con-trasts, the use of sunglasses, or if the driver isnot looking straight ahead may make the vis-ual warning signal in the windshield difficult tosee.
WARNING
Pilot Assist only provides warnings for vehi-cles that its radar sensor and camera havedetected. For this reason, a warning may begiven later than expected or not at all. Thedriver should never wait for a warning beforeapplying the brakes.

Related information
•Pilot Assist* (p. 295)
•Starting and activating Pilot Assist-1*(p. 298)
•Setting a Pilot Assist-1 time interval (p. 300)
•Deactivating/resuming Pilot Assist-1(p. 301)
•Automatic braking with Pilot Assist-1(p. 303)
•Pilot Assist-1 limitations (p. 304)
•Adaptive Cruise Control (ACC)* (p. 281)
•Distance Alert* (p. 279)
•Head-up display (HUD)* (p. 122)
•Radar sensor limitations (p. 319)
•Camera limitations (p. 323)
Starting and activating Pilot
Assist-1*
Pilot Assist has to be started and then activatedbefore it can provide steering assistance andregulate speed and the distance to the vehicleahead.
Function buttons and symbols

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DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.302

Automatic standby mode
Pilot Assist interacts with other systems, such asElectronic Stability Control. If any of these othersystems are not functioning properly, Pilot Assistwill automatically be deactivated.

WARNING
If this happens, the driver will be alerted by anaudible signal and a message in the instru-ment panel. The driver will have to adapt thevehicle's speed, apply the brakes when nec-essary and keep a safe distance to the vehicleahead.
Pilot Assist switches automatically to standbymode if:
•the camera cannot detect the traffic lane'sside marker lines
•the vehicle ahead is not within a reasonable(detectable) distance
•the driver's hands are not on the steeringwheel
•the driver unbuckles the seat belt
•engine speed (rpm) is too high/low
•the wheels lose traction
•brake temperature is too high
•the parking brake is set
•The camera lens/radar sensor is covered bye.g., wet snow or if heavy rain interferes withradar waves
Reactivating Pilot Assist from standby
mode
Function buttons and symbols
–Press the button (2).
>The most recently set speed will be usedand symbol (8) in the instrument panelwill change from WHITE to GRAY.

Related information
•Pilot Assist* (p. 295)
•Pilot Assist-1* (p. 295)
•Starting and activating Pilot Assist-1*(p. 298)
•Setting a Pilot Assist-1 time interval (p. 300)
•Automatic braking with Pilot Assist-1(p. 303)
•Pilot Assist-1 limitations (p. 304)
•Adaptive Cruise Control (ACC)* (p. 281)
•Distance Alert* (p. 279)