engine VOLVO V90 2017 Repair Manual

STARTING AND DRIVING
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11. Start the engine in the car with the dis-
charged battery.
IMPORTANT
Do not touch the connections between cable and car during the starting attempt. There is arisk of sparks forming.
12. Remove the jump leads in reverse order -first the black and then the red. Make sure that none of the black jump lead's clamps comes into contact with the car'spositive jump-starting point/donor battery'spositive terminal or the clamp connected tothe red jump lead.
WARNING
• The battery can generate oxyhydrogen gas, which is highly explosive. A spark canbe formed if a jump lead is connectedincorrectly, and this can be enough forthe battery to explode.
• The battery contains sulphuric acid, whichcan cause serious burns.
• If sulphuric acid comes into contact witheyes, skin or clothing, flush with largequantities of water. If acid splashes intothe eyes - seek medical attention imme-diately.
Related information
•Starter battery (p. 530)
• Ignition positions (p. 385)
• Starting the car (p. 386)
• Opening and closing the bonnet (p. 514)
Gearbox
The gearbox is part of the car's driveline (power transmission) between engine and drive wheels.The function of the gearbox is to change thegear ratio depending on speed and powerrequirements.
There are two main types of gearbox, manual and automatic. The manual gearbox has six gears. The automatic gearbox can have either eight gears or six gearsdepending on which engine the car is equippedwith. The number of gear changes means thatthe engine's torque and power range can beused effectively. It is also possible to select gears manually with the automatic gearbox. The driver display respec-tively shows which gear or gear position is cur-rently in use.
IMPORTANT
To prevent damage to any drive system com- ponents, the working temperature of thegearbox is checked. If there is a risk of over-heating, a warning symbol illuminates in thedriver display and a text message is shown -follow the recommendation given.
Symbols in the driver displayIf a fault should occur in the gearbox, the driver display shows a symbol and a message.

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Symbol Specification
Information or error message for gearbox. Follow the recommenda-tion given.
Hot or overheated gearbox. Follow the recommendation given.
Related information
•Gear positions for automatic gearbox (p. 390)
• Manual gearbox (p. 392)
• Gear shift indicator
* (p. 392)
Gear positions for automatic gearbox
With an automatic gearbox, the system chooses the gear so that driving is optimal. The gearboxalso has a manual gearshift mode.
Gear positions in the driver display
The driver display shows the gear selector's posi- tion:
P, R, N, D or M.
In manual gearshift mode, the gear being used is also shown.
Gear positions
Park position - P
Select the P position when the car is parked or
when starting the engine. The car must be sta- tionary when the park position is selected. To be able to move the gear selector from thepark position, the brake pedal must be depressed and the ignition position must be
II.
The gearbox is mechanically blocked when the P
position is engaged. Apply the parking brake first when the car is parked.
WARNING
Always use the parking brake when parking on an inclined surface. Engaging a gear or the automatic transmission's P position is not suf-
ficient to hold the car stationary in all situa- tions.
NOTE
The gear selector must be in P position to
allow the car to be locked and alarmed.
Reverse position - R
Select position R to reverse. The car must be sta-
tionary when reverse position is selected.
Neutral position - N
No gear is engaged and the engine can be started. Apply the parking brake if the car is sta- tionary with the gear selector in N position.
To be able to change from the neutral position to another gear position, the brake pedal must be depressed and the ignition position must be II.

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Drive position - D
D is the normal driving position. Shifting up and
down takes place automatically based on the level of acceleration and speed. The car must be stationary when changing gear from R position to
D position.
Manual gearshift mode - M
The manual gearshift mode can be selected at any time while driving. The car engine-brakeswhen the accelerator pedal is released. Select manual gearshift mode by moving the gear selector sideways from position D to the
end position at " ±". The driver display shows
which gear is engaged at the time.
• Press the gear selector forwards to "
+"
(plus) to change up one step and release it.
• Press the gear selector backwards to "
–"
(minus) to change down one step and release it.
manual gearshift mode in the driver display 2
.
The gearbox automatically shifts down if the speed decreases to a level lower than appropri-ate for the selected gear, in order to avoid jerkingand stalling. To return to automatic gear changing, press the gear selector sideways to the end position at D.
Kick-downWhen the accelerator pedal is pressed all the way to the floor (beyond the position normallyregarded as full acceleration) a lower gear isimmediately engaged. This is known as kick-down. If the accelerator is released from the kick-down position, the gearbox automatically changes up. Kick-down is used when maximum accelerationis needed, such as for overtaking.
Safety function
To prevent over-revving of the engine, the gear- box control program has a protective downshiftinhibitor. The gearbox does not permit downshifting/kick- down which would result in an engine speed highenough to damage the engine. Nothing happensif the driver still tries to shift down in this way athigh engine speed – the original gear remainsengaged. When kick-down is activated the car can change one or more gears at a time depending onengine speed. The car changes up when theengine reaches its maximum speed in order toprevent damage to the engine.
Related information
•
Gearbox (p. 389)
• Changing gear with steering wheel paddles
*
(p. 395)
• Gear shift indicator
* (p. 392)
• Gear selector inhibitor (p. 394)
• Ignition positions (p. 385)
2
The figure is schematic, the layout may vary depending on the car's equipment.

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Gear selector inhibitorThe gear selector inhibitor prevents accidental changing between different gear positions in anautomatic gearbox.
There are two different types of gear selector inhibitor - mechanical and automatic.
Mechanical gear selector inhibitor
The gear selector can be moved forward and back freely between N and D. Other positions are
locked with a latch that is released with the inhib- itor button on the gear selector. With the inhibitor button depressed the lever can be moved forwards or backwards between P, R ,
N and D.
Automatic gear selector inhibitorThe automatic gear selector inhibitor has special safety systems.
From park position - P
To be able to move the gear selector from the P
position, the brake pedal must be depressed and the ignition position must be II.
From neutral position - N
If the gear selector is in the N position and the
car has been stationary for at least 3 seconds (irrespective of whether the engine is running)then the gear selector is locked. To be able to move the gear selector from the N
position to another gear position, the brake pedal must be depressed and the ignition position must be II.
Deactivate automatic gear selector
inhibitor
If the car cannot be driven, e.g. due to a dis- charged battery, the gear selector must be moved to the
N position so that the car can be
moved.
Lift the rubber mat in the compartment in front of the gear selector. Locate the holewith a spring-loaded button in the bottom ofthe compartment.
Press a small screwdriver into the hole and hold.
Move the gear selector to position N and
release the button.
4. Put the rubber mat back in place.
Related information
• Gear positions for automatic gearbox (p. 390)
• Ignition positions (p. 385)

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Changing gear with steering wheel paddles*
The steering wheel paddles are a complement to the gear selector and make it possible tochange gear manually without releasing handsfrom the steering wheel.
Activating the steering wheel paddlesTo be able to change gear with the steering wheel paddles they must first be activated:
–Pull one of the paddles toward the steering wheel.
> A figure in the driver display indicates cur- rent gear.
Driver display when changing gear with steering wheel paddles.
Manual gearshift mode
In gear position M the steering wheel paddles are
automatically activated.
Driver display when changing gear with steering wheel paddles in manual gearshift mode.
Changing gearTo change gear one step:
–Pull one of the paddles backwards - towards the steering wheel - and release.
" -": Selects the next lower gear.
" + ": Selects the next higher gear.
A gear change occurs at each pull of the paddle provided that the engine speed does not leavethe permitted range. After each gear change the figure in the driver display changes to show the current gear.
Deactivating the function
Manual deactivation in gear position D.
–Deactivate the steering wheel paddles by pulling the right-hand paddle ( +) toward the
steering wheel and holding in place until the figure in the driver display for the currentgear extinguishes.

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Automatic deactivation
In gear position D the steering wheel paddles are
deactivated after a short time if they are not used. This is indicated by means of the figure for thecurrent gear extinguishing. The exception is during engine braking - then the paddles are activated for as long as engine brak-ing is in progress. In gear position M there is no automatic deactiva-
tion.
Related information
• Gear positions for automatic gearbox (p. 390)
• Gear shift indicator
* (p. 392)
Start/Stop
With the Start/Stop function, the engine switches off temporarily when the car has stop-ped e.g. at traffic lights or in a traffic queue, andthen starts again automatically when the journeyis resumed.
Start/Stop is one of several energy-saving func- tions intended to reduce fuel consumption, whichin turn helps to reduce exhaust emissions. The system makes it possible to adopt an envi- ronmentally-conscious driving style by allowingthe car to engine auto-stop when possible.
Related information
• Using the Start/Stop function (p. 396)
• Conditions for the Start/Stop function(p. 398)
Using the Start/Stop function The Start/Stop function temporarily switches off the engine when stationary and then restarts itautomatically when the journey is resumed.
The Start/Stop function is available when the engine is started and can be activated if certainconditions have been met. The driver display indi-cates whether the function is available, active orunavailable, see heading "Symbols in driver dis-play" below. All of the car's normal systems such as lighting, radio, etc. work normally, even when the engine isauto-stopped. However, some equipment mayhave its output temporarily reduced, e.g. the cli-mate control system's fan speed or extremelyhigh volume on the audio system.
Auto-stopThe following is required for the engine to auto-stop:

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With automatic gearbox
• Stop the car with the foot brake and then keep your foot on the brake pedal - theengine stops automatically.
With manual gearbox
• Declutch, set the gear lever in neutral posi-tion and release the clutch pedal - theengine stops automatically.
In drive mode
Eco or Comfort3 , the engine may
auto-stop before the car is completely stationary. With the
Adaptive cruise or Pilot Assist func-
tion activated, the engine will autostop after approximately three seconds. See the section "Conditions for Start/Stop func- tion".
AutostartThe following is required for the engine to auto-start: With automatic gearbox
• Release the brake pedal - the engine will autostart and you can continue driving. On anuphill gradient hill start assist (HSA) engages, which prevents the car from rollingbackwards.
• When the
Auto hold function is activated,
auto-start is delayed until the accelerator pedal is depressed.
• When the
Adaptive cruise or Pilot Assistfunction are activated, the engine will autos- tart when the accelerator pedal is depressed, or by pressing the
button on the left
keypad of the steering wheel.
• Maintain foot pressure on the brake pedal and depress the accelerator pedal - theengine auto-starts.
• On a downhill gradient: Release pressure onthe brake pedal slightly so that the carbegins to roll - the engine will auto-start aftera slight speed increase.
With manual gearbox
• With the gear lever in neutral position:Depress the clutch pedal or depress theaccelerator pedal - the engine starts.
• On a downhill gradient: Release pressure onthe brake pedal slightly so that the carbegins to roll - the engine will auto-start aftera slight speed increase.
Symbols in the driver display
With 12-inch driver display
•
The text READY is shown in the tachometer
when the function is available.
• A pointer in the tachometer points to
READY when the function is active and the
engine is auto-stopped.
• The text
READY is greyed out when the
function is not available.
• No text is shown when the function is deacti- vated.
The function is active and the engine is auto-stopped.
3
Normal start mode.

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With 8-inch driver display
The symbol is shown in the lower edge of the speedometer.
Symbol Specification
White symbol: The function is avail- able.
Beige symbol: The function is active and the engine is auto-stop-ped.
The function is not available, the conditions are not fulfilled. No symbol is shown when the function is deactivated.
Deactivating the functionIn certain situations it may be desirable to tempo- rarily deactivate the function.
Deactivate using the
Start/
Stop function button in the
centre display's function view. The indication in the button isswitched off when the functionis deactivated.
The function is deactivated until •
it is reactivated
• the drive mode is changed to
Eco orComfort
• the next time the car is started.
Related information
•
Start/Stop (p. 396)
• Conditions for the Start/Stop function (p. 398)
• Hill start assist (p. 412)
• Automatic braking when stationary (p. 412)
• Adaptive cruise control
* (p. 290)
• Activating and starting the Pilot Assist
*
(p. 307)
Conditions for the Start/Stop function For the Start/Stop function to work requires that a number of conditions are met.
If any condition is not met, this will be indicated in the driver display. See the section "Using theStart/Stop function".
The engine does not auto-stopThe engine does not auto-stop in the followingcases: • The car has not reached approx. 10 km/h (6 mph) after starting.
• After a number of repeated auto stops,speed must again exceed approx. 10 km/h(6 mph) before the next auto stop.
• The driver has unfastened the seatbelt.
• The capacity of the starter battery is belowthe minimum permissible level.
• The engine is not at normal operating tem-perature.
• The ambient temperature is under -5 °C orabove approx. 30 °C.
• the windscreen's electric heating is activated.
• The environment in the passenger compart-ment deviates from the set values.
• the car is reversed.
• The starter battery's temperature is below orabove the permitted limit values.

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•
The driver makes sweeping steering wheel movements.
• The road is very steep.
• The bonnet is opened.
• When driving at high altitudes when theengine has not reached operating tempera-ture.
• The ABS system has been activated.
• In the event of heavy braking (even withoutthe ABS system having been activated).
• Many starts during a short period of timehave activated the starter motor's thermalprotection.
• The exhaust system's particulate filter is full 4
.
• A trailer is connected electrically to the car

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Related information
• Start/Stop (p. 396)
• Using the Start/Stop function (p. 396)
• Support battery (p. 533)
Drive modes
*
Selection of drive mode affects the car's driving characteristics in order to enhance the drivingexperience and facilitate driving in special situa-tions.
Using the drive modes it is possible to quickly have access to the car's numerous functions andsettings for different driving needs. The followingsystems are adapted to obtain the best possibledriving characteristics in each respective drivemode: • Steering
• Engine/gearbox 5
/all-wheel drive *
• Brakes
• Shock absorption
• Driver display
• Start/Stop function
• Climate settings
Select the drive mode that best suits the current driving conditions. Remember that not all drivemodes can be selected in all situations.
Selecting drive mode
1. Press the drive mode control DRIVE MODE.
> A pop-up menu is opened in the centre display.
2. Roll the wheel upward or downward until the desired drive mode is highlighted.
3. Press the drive mode control or tap directly on the touch screen to confirm the selection.
> The selected drive mode is indicated inthe driver display.
A message is shown when a drive mode is unse- lectable, for example:
•
Cannot be selected because gear is in manual
•Cannot be selected due to low battery
5 Applies to automatic gearbox.