2016 VOLVO XC90 T8 stop start

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CLIMATE
* Option/accessory, for more information, see Introduction.
180
PreconditioningPreconditioning the vehicle before driving can help reduce wear and reduce energy consump-tion during a trip.
NOTE
Full preconditioning is only possible when the vehicle's charging cable is connected. In other cases, the passenger compartment can be cooled for 3 minutes in warm weather. This function is started from the
Parking
climate tab in the center display's Climate
view.
With the charging cable connected, precondition- ing can be started immediately or a timer functioncan start this procedure at a later time. This feature utilizes several of the vehicle's sys- tems:
• The High Voltage Coolant Heater (HVCH) warms the hybrid battery and passengercompartment in cold weather.
• In warm weather, the ventilation system willattempt to cool the passenger compartmentto the current ambient temperature.
• In warm weather, the air conditioning systemwill cool the passenger compartment to acomfortable temperature.
• The electrically heated steering wheel andseats can be activated. •
Heating for the windshield, tailgate windowand door mirrors can be activated.
If preconditioning is used in warm weather, a cer- tain amount of water may condense under thevehicle, which is normal. When preconditioning is used, this system will attempt to establish a comfortable temperature in the passenger compartment but not necessarily
the temperature currently set in the climate system .
Maintaining a comfortable passenger compartment climate
The climate in the passenger compartment can be maintained even when the vehicle is parkedand the engine is turned off (e.g., if anyoneintends to remain in the vehicle). This function can only be direct-started.This function utilizes several of the vehicle's sys- tems:
• Residual heat from the engine is used help keep the passenger compartment warm incool temperatures.
• In warm weather, the ventilation system willattempt to cool the passenger compartmentto the current ambient temperature.
This function will not be activated if the vehicle is locked from the outside in order to avoid usingresidual engine heat unnecessarily. This functionis primarily intended for use when the engine isnot running but someone remains in the vehicle.
Related information
• Starting and stopping preconditioning (p. 184)
• Activating/deactivating the climate comfort retaining function
* (p. 181)
• Activating/deactivating the parking climate timer (p. 181)
• Charging the hybrid battery (p. 383)
• Hybrid battery charging cable (p. 375)

CLIMATE
* Option/accessory, for more information, see Introduction.
184
Starting and stopping preconditioning
Preconditioning heats/cools the passenger com- partment prior to driving. Please note that thecharging cable must be connected.
Starting/stopping from the centerdisplay
The preconditioning button in the Parking climate tab
in Climate view.
1. Open Climate view in the center display. 2. Tap
Parking climate .
The window for seat/steering wheel heating in Climate view's Parking climate tab
3. Tap the boxes to select if seat/steering
wheel heating is to be activated/deactivated when preconditioning starts.
4. Tap
Preconditioning.
> Preconditioning starts/stops and the indi- cator lights in the buttons will be on/off.
NOTE
Full preconditioning is only possible when the vehicle's charging cable is connected. In other cases, the passenger compartment can be cooled for 3 minutes in warm weather. This function is started from the
Parking
climate tab in the center display's Climate
view.
The vehicle's doors and windows should be closed during preconditioning.
Starting from a cell phone *Starting preconditioning and checking the cur-rent settings can be done from a cell phone withthe Volvo On Call mobile app. Preconditioningheats the passenger compartment to a comforta-ble temperature or cools the compartment to thecurrent ambient temperature. If the vehicle is equipped with the optional Engine Remote Start (ERS), the air conditioningcan be used to pre-cool the passenger compart-ment to a comfortable temperature.
Related information
•Setting the parking climate (preconditioning) timer (p. 182)
• Activating/deactivating the parking climatetimer (p. 181)
• Hybrid battery charging cable (p. 375)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
318
Using Park Assist Pilot (PAP) *
Park Assist Pilot (PAP) gives the driver instruc- tions during the parking procedure.
Symbols, images and text in the center display indicate when the various steps in the parkingprocedure will be carried out. PAP can be activated if the following conditions are met after the engine has started:
• The vehicle may not be towing a trailer.
• The vehicle's speed must be below approx. 30 mph (50 km/h).
NOTE
If a trailer hitch is configured in the vehicle's electrical system, PAP will take the trailerhitch into consideration when determining thenecessary size of a parking space.
ParkingProcedure for parking:
1. The system searches for and measures a
possible parking space.
2. The vehicle is steered while it is backing into the parking space.
3. The vehicle's position is adjusted in the park- ing space by moving forward and rearward.
1: Searching and measuring
Parallel parking
Perpendicular parking
PAP searches for a potential parking space and measures it to see if there is sufficient space foryour vehicle. To start this procedure: 1. Tap the
Park Assist button
in the center display's Function view. If necessary, slow down toa speed below 20 mph (30km/h) for parallel parking orapprox. 12 mph ( 20 km/h) forperpendicular parking.
2. Keep an eye on the display and be prepared to stop the vehicle when you are instructed by PAP to do so.
3. Select
Parallel parking or Perpendicular
parking and put the transmission in reverse.
4. Keep an eye on the display and be prepared to stop the vehicle when you are instructed by PAP to do so.
5. Stop the vehicle when instructed to do so.
NOTE
PAP normally searches for available parking spaces along the curb on the right (passeng-er's) side of the vehicle. However, it can alsoassist in finding and parking in spaces on thedriver's side. To do so:
• Activate the left turn signal. PAP will then search for a parking space on the leftside of the vehicle.

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DRIVER SUPPORT
326
SymbolMessageDescription
ESC Temporarily offThe ESC system function has been temporarily reduced due to high brake disc temperature. The function reac- tivates automatically when the brakes have cooled.
ESC Service requiredThe ESC system is not functioning properly.
• Stop the vehicle in a safe place, turn off the engine and restart it.
• If the message is still displayed when the engine has restarted, drive to an authorized Volvo workshop to have the system inspected.
WARNING
The stability system is intended to help improve driving safety. It supplements, but cannever replace, the driver's judgment andresponsibility when operating the vehicle.Speed and driving style should always beadapted to traffic and road conditions.
Related information
• Electronic Stability Control (ESC) (p. 323)

STARTING AND DRIVING
* Option/accessory, for more information, see Introduction.
346
Starting and driving
The vehicle is equipped with an automatic trans- mission that also makes it possible to shift gearsmanually. Certain functions can also be used when the engine is not running, depending on the ignitionmode being used.
Related information
• Starting the engine (p. 372)
• Ignition modes (p. 370)
• Automatic transmission (p. 395)
• Opening/closing the fuel filler door (p. 363)
• Parking brake (p. 352)
Brakes The brake system is a hydraulic system consist- ing of two separate brake circuits. If a problemshould occur in one of these circuits, it is stillpossible to stop the vehicle with the other brakecircuit.
Brake systemIf one of the brake circuits is not functioning, more pressure will be needed on the brake pedal(and the pedal will go down farther) for normalbraking effect. If the brake pedal must be depressed farther than normal and requires greater foot pressure,the stopping distance will be longer. Pressure on the brake pedal is enhanced by the power braking function.
WARNING
If vehicle does not have electrical current and both the electric motor and gasoline engineare switched off, the brakes cannot be usedto stop the vehicle.
When the Hill Start Assist function is being used, it will take slightly longer for the brake pedal toreturn to its normal position if the vehicle isparked on an incline or uneven surface. When driving in very hilly areas or if the vehicle is carrying a heavy load, using brake mode B to augment the brakes or the
Off Road* drive mode can also be used to increase the engine braking effect at low speeds.
Anti-lock Braking System
ABS
The ABS system helps to improve vehicle control (stopping and steering) during severe brakingconditions by limiting brake lockup. When ABS is operating, there may be some vibration in the brake pedal, which is normal. The system performs a brief self-diagnostic test when the engine has been started and driverreleases the brake pedal. Another automatic testmay be performed when the vehicle first reachesa speed of approximately 6 mph (10 km/h). Thebrake pedal will pulsate several times and asound may be audible from the ABS controlmodule, which is normal.
Function check when the engine is
started
A Plug-in Hybrid is equipped with a "brake bywire" brake system. A function check is per-formed each time the engine is started and thedriver depresses the brake pedal to move the gear selector from P.
In certain cases, a message may appear in the instrument panel saying that pressure on thebrake pedal is too low. Press harder on the pedal.
Light braking charges the hybrid batteryWhen the brakes are applied lightly, the electricmotor's braking function is used, which converts

STARTING AND DRIVING
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* Option/accessory, for more information, see Introduction.347
kinetic energy into electricity that is used to charge the hybrid battery. This is indicated in theinstrument panel, see also the article "Generalinformation about the XC90 T8 Twin EnginePlug-in Hybrid".
Battery charging gauge in the instrument panel
This function is active at speeds from approx. 90 mph (150 km/h) down to 3 mph (5 km/h).When braking at speeds outside of this range orduring harder braking, the hydraulic brake systemis used.
Cleaning the brake discsCoatings of dirt and water on the brake discsmay result in delayed brake function. This delay isminimized by cleaning the brake linings. Cleaning the brake pads is advisable in wet weather, prior to long-term parking, and after thevehicle has been washed. Do this by braking gen-tly for a short period while the vehicle is moving.
Driving on wet or salted roadsProlonged driving on wet or salted roads canaffect brake function and increase stopping dis-tance. Be sure to keep a safe distance to thevehicle ahead when driving under these condi-tions.
Brake pad inspection
On vehicles equipped with a jack
*, the condition
of the brake pads can be checked by raising thevehicle and performing a visual inspection of thebrake pads.
WARNING
• If the vehicle has been driven immediately prior to a brake pad inspection, the wheelhub, brake components, etc., will be veryhot. Allow time for these components tocool before carrying out the inspection.
• Apply the parking brake and put the gear selector in the Park (
P) position.
• Block the wheels standing on the ground, use rigid wooden blocks or large stones.
WARNING
•
Use the jack intended for the vehicle when changing a tire. For any other job,use stands to support the vehicle.
• The jack should be kept well-greased andclean, and should not be damaged.
• Be sure the jack is on a firm, level, non-slippery surface.
• No objects should be placed between thebase of jack and the ground, or betweenthe jack and the attachment bar on thevehicle.
• The jack must correctly engage the jackattachment.
• Never allow any part of your body to beextended under a vehicle supported by ajack.

STARTING AND DRIVING
349
Auto-hold brake function
With the Auto-hold brake function, the driver can release the brake pedal and the brakes willremain applied, for example, when the vehiclehas stopped at a traffic light or intersection.
When the vehicle is no longer moving forward, Auto-hold applies the brakes automatically, eitherusing the normal brakes or the parking brake.The brakes will be released when the acceleratorpedal is depressed. If the driver's door is opened or the engine is turned off, the parking brake will be applied auto-matically.
Auto-hold control
Auto-hold control and indicator light
Turn Auto-hold on or off by pressing the control in the tunnel console. The indicator light illumi-nates when the function is on. When Auto-hold is off, Hill Start Assist (HSA) willbe activated to help prevent the vehicle from roll-ing backwards when starting up a hill.
Instrument panel symbol
SymbolExplanation
The symbol in the instrument panel illuminates when this func-tion is using the normal brakes tokeep the vehicle stationary.
A
B
This symbol in the instrument panel illuminates when Auto-holdis using the parking brake to keepthe vehicle stationary
A
US models
B Canadian models
Related information
• Hill Start Assist (p. 351)
• Brake functions (p. 348)
Brake assist system
The Brake Assist System (BAS) increases brak- ing force, thereby helping reduce braking dis-tance. The system monitors the driver's braking habits and increases braking force when necessary.Brake force can be increased up to the point atwhich the ABS system is activated. The functionis deactivated when pressure on the brake pedaldecreases.
Related information
• Brakes (p. 346)

STARTING AND DRIVING
350
Braking effect after a collisionIn certain types of collisions, the vehicle's brakes are applied to help prevent or mitigate a secon-dary collision.
Maintaining control of the vehicle after a collision may be difficult. To help avoid or mitigate theeffect of a secondary collision, the brakes areapplied automatically to help bring the vehicle toa stop. The brake lights and hazard warning flashers will be activated and the flashers will remain on afterthe vehicle has come to a standstill. The parkingbrake will then be applied automatically. In a situation where stopping the vehicle may not be desirable, the driver can override this systemby pressing the accelerator pedal. This feature can only function if the brake system is intact after the collision.
Related information
• Brake functions (p. 348)
• Airbag system (p. 89)
• Rear Collision Warning (RCW) (p. 292)
Emergency brake lights
The emergency brake lights activate in the event of hard braking/rapid deceleration at most nor-mal driving speeds or if the ABS system is acti-vated. This function causes an additional taillighton each side of the vehicle to illuminate to helpalert vehicles traveling behind.
Once the emergency brake lights have been acti- vated, if the driver releases the brake pedal, thebrake lights will return to their normal function.
Related information
• Brakes (p. 346)
• Hazard warning flashers (p. 147)
• Brake lights (p. 146)
Hill Descent Control (HDC) HDC is a type of low-speed automatic engine brake and makes it possible to increase ordecrease the vehicle's speed on steep downhillgradients using only the accelerator pedal, with-out applying the brakes. HDC is integrated into the
Off Road drive
mode.
HDC is particularly useful when driving down steep hills with rough surfaces, and where theroad may have slippery patches.
WARNING
HDC does not function in all situations, and is a supplementary braking aid. The driver hasfull responsibility for driving in a safe manner.
FunctionHDC allows the vehicle to roll forward or in reverse at very low speed with enhanced enginebraking. However, speed can be adjusted withthe accelerator pedal. When the acceleratorpedal is released, the vehicle will return to verylow speed. The driver can use the brakes to slow or stop the vehicle at any time. HDC is activated along with Low Speed Control (LSC), which together make driving on slipperysurfaces at low speeds easier.