2020 VOLVO S90 engine

DRIVER SUPPORT
270
Electronic Stability Control symbols and messagesA number of symbols and messages related to Electronic Stability Control (ESC 6
) may be displayed in the instrument panel. Several examples are provided below.
Symbol Message Meaning
Steady glow for approx. 2 seconds. System check when the engine is started.
Flashing light. The system is actively operating.
Steady glow. Sport mode is activated.
NOTE! The system is not deactivated in this mode, but has partially
reduced functionality.
ESC Temporarily offThe system's functionality has been temporarily reduced due to high brake system temperatures. The function will be automatically reactivated when the brakes have cooled.
ESC Service requiredThe system is not functioning properly. Stop the vehicle in a safe place, turn off the engine and then restart it.
A text message can be erased by briefly press- ing the
button in the center of the right-
side steering wheel keypad. If the message persists: Contact a workshop
‒
an authorized Volvo workshop is recom- mended.
Related information
Electronic Stability Control (p. 267)
6
Electronic Stability Control

DRIVER SUPPORT
* Option/accessory.
272
Collision risk warning from driver support (p. 294)
Head-up display
* (p. 139)
Activating or deactivating Distance Alert 8
Distance Alert can be turned off. The function is only available in vehicles that can displayinformation on the windshield with a head-up display *.
Activate or deactivate the function using this button inthe center display's Functionview.
GREEN button indicator light – the func- tion is activated.
GRAY button indicator light – the functionis deactivated.
Distance Alert is automatically activated eachtime the engine is started.
Related information
Distance Alert
* (p. 271)
Distance Alert limitations (p. 272)
Distance Alert limitations 9
Distance Alert functionality may be reduced in certain situations. The function is onlyavailable in vehicles that can display informa-tion on the windshield with a head-up dis- play *.
WARNING
Detection ability may be affected by vehicle size, e.g. motorcycles, whichcan cause the warning light to come onat a shorter time interval than that setor cause the warning to be temporarilyabsent.
Very high speeds can cause the light tocome on at a shorter time interval thanthat set due to limitations in the rangeof the radar unit.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information

Distance Alert
* (p. 271)
Camera/radar sensor limitations (p. 307)
Head-up display
* (p. 139)
8
Distance Alert
9 Distance Alert

DRIVER SUPPORT
}}
* Option/accessory.273
Cruise control
Cruise Control (CC 10
) can help the driver
maintain an even speed to provide a more relaxing driving experience on highways andlong, straight roads with even traffic flows.
Overview
Function buttons and symbols.
: Activates Cruise Control from
standby mode and resumes the set speed
: Increases the set speed
: From standby mode – activates
Cruise Control and sets the current speed
: From active mode – deactivates/
puts Cruise Control in standby mode
: Reduces the set speed
Marker for set speed
The vehicle's current speed
Set speed
NOTE
In vehicles equipped with Adaptive Cruise Control *(ACC 11
), it is possible to switch
between Cruise Control and Adaptive Cruise Control.
WARNING
The function is supplementary driver support intended to facilitate drivingand help make it safer – it cannot han-dle all situations in all traffic, weatherand road conditions.
The driver is advised to read all sec-tions in the Owner's Manual about thisfunction to learn of its limitations,which the driver must be aware ofbefore using the function.
Driver support functions are not a sub-stitute for the driver's attention andjudgment. The driver is always respon-sible for ensuring the vehicle is drivenin a safe manner, at the appropriatespeed, with an appropriate distance toother vehicles, and in accordance withcurrent traffic rules and regulations.
Using engine braking instead of applying the brakes
Cruise Control regulates speed by lightly applying the brakes. On downgrades, it cansometimes be desirable to roll a bit faster andlet speed be reduced instead by engine brak-ing alone. The driver can temporarily disen-gage the Cruise Control braking function.
10
Cruise Control
11 Adaptive Cruise Control

||
DRIVER SUPPORT
* Option/accessory.
274 To disengage CC:
–Press the accelerator pedal about halfway down and then release it.
> Cruise Control will automatically disen-
gage the automatic brake function and speed will only be reduced using theengine braking function.
Related information
Driver support systems (p. 266)
Selecting and activating cruise control(p. 274)
Deactivating cruise control (p. 275)
Cruise control standby mode (p. 275)
Adjusting set speed for driver support(p. 296)
Switching between cruise control and Adaptive Cruise Control
* in the center dis-
play (p. 282)
Selecting and activating cruise control The Cruise Control (CC 12
) function must be
selected and activated in order to regulate speed.
In order to start Cruise Control from standby mode, the vehicle's current speed must be30 km/h (20 mph) or higher.
1. Press the ◀ (1) or ▶ (3) button on the
steering wheel keypad and scroll to the cruise control symbol
(4).
> Gray symbol – cruise control is in standby mode. 2.
When cruise control is selected, press
(2) on the steering wheel keypad to acti- vate.
> White symbol – cruise control starts
and the current speed is stored as the maximum speed. The lowest speedthat can be set is 30 km/h (20 mph).
Reactivating cruise control to the last stored speed
–When cruise control is selected, press on the steering wheel keypad to activate.
> The Cruise Control marking in theinstrument panel will change from GRAY to WHITE and the vehicle willthen return to the most recently setspeed.
WARNING
A noticeable increase in speed may follow when the speed is resumed with the
steering wheel button.
Related information
Cruise control (p. 273)
Deactivating cruise control (p. 275)
Cruise control standby mode (p. 275)
12
Cruise Control

||
DRIVER SUPPORT
* Option/accessory.
276
Automatic standby modeAdaptive Cruise Control may go into standby mode if:
the wheels lose traction
the engine speed (rpm) is too low/high
the temperature in the brake systembecomes too high
the vehicle's speed goes below 30 km/h(20 mph).
The driver must then control the vehicle'sspeed.
Related information
Cruise control (p. 273)
Selecting and activating cruise control(p. 274)
Deactivating cruise control (p. 275)
Adaptive Cruise Control
*15
Adaptive Cruise Control (ACC 16
) helps the
driver maintain a constant speed with a set time interval to the vehicle ahead.
Adaptive Cruise Control can help provide a more relaxed driving experience on long tripson highways or long, straight roads with eventraffic flows.
The camera/radar sensor measures the distance to the vehicle ahead.
The driver sets a speed and a time interval to the vehicle ahead. If the camera/radar sensordetects a slower-moving vehicle ahead, yourvehicle's speed will be automatically adaptedaccording to the set time interval to that vehi-cle. When there are no longer slower-moving vehicles ahead, the vehicle will return to theset speed. If the Curve Speed Assist (CSA)
* function is
activated, it may also affect the vehicle's speed.
WARNING
The function is supplementary driver support intended to facilitate drivingand help make it safer – it cannot han-dle all situations in all traffic, weatherand road conditions.
The driver is advised to read all sec-tions in the Owner's Manual about thisfunction to learn of its limitations,which the driver must be aware ofbefore using the function.
Driver support functions are not a sub-stitute for the driver's attention andjudgment. The driver is always respon-sible for ensuring the vehicle is drivenin a safe manner, at the appropriatespeed, with an appropriate distance toother vehicles, and in accordance withcurrent traffic rules and regulations.
Adaptive Cruise Control regulates speed byaccelerating and braking. It is normal for the
15 Depending on market, this function can be either standard or optional.
16 Adaptive Cruise Control

DRIVER SUPPORT
}}
* Option/accessory.281
WARNING
With automatic standby mode, the driver is warned by an acoustic signal and a mes-sage on the instrument panel.
The driver must then regulate vehicle speed, apply the brakes if necessary,and maintain a safe distance to othervehicles.
Adaptive Cruise Control may go into standbymode if: your vehicle's speed goes below 5 km/h(3 mph) and ACC cannot determine if thevehicle ahead is stationary or if it isanother object, e.g. a speed bump.
your vehicle's speed goes under 5 km/h(3 mph) and the vehicle ahead turns sothat ACC no longer has a vehicle to follow.
the driver opens the door.
the driver unbuckles the seat belt.
the engine speed (rpm) is too low/high.
one or more of the wheels lose traction.
the brake temperature is high.
the parking brake is applied.
the camera/radar sensor is covered bysnow or heavy rain (the camera lens/radarwaves are blocked).
Related information

Adaptive Cruise Control
* (p. 276)
Selecting and activating Adaptive Cruise Control
* (p. 278)
Deactivating Adaptive Cruise Control
*
(p. 279)
Adaptive Cruise Control
* limitations
(p. 281)Adaptive Cruise Control *26
limitations
Adaptive Cruise Control (ACC 27
) may have
limited functionality in certain situations.
Steep roads and/or heavy loadsAdaptive Cruise Control is primarily intended to be driven on flat roads. The function maynot be able to maintain the correct time inter-val to the vehicle ahead when driving downsteep hills. The driver should be extra attentiveand prepared to apply the brakes.
Other limitationsThe Off Road drive mode cannot be selected
if Adaptive Cruise Control is activated.
26 Depending on market, this function can be either standard or optional.
27 Adaptive Cruise Control

DRIVER SUPPORT
* Option/accessory.
290
Pilot Assist *38
standby mode
Pilot Assist can be deactivated and put in standby mode. This may happen automati-cally or be due to driver intervention.
Standby mode means that the function is selected in the instrument panel but not acti-vated. In standby mode, Pilot Assist will notregulate the speed or distance to the vehicleahead or provide steering assistance.
Standby mode due to action by the
driver
Pilot Assist will be deactivated and put instandby mode if any of the following occurs:
The brakes are applied.
The gear selector is moved to
N.
A turn signal is used for more than1 minute.
The vehicle is driven faster than the setspeed for more than 1 minute.
Automatic standby modePilot Assist is dependent on other systems, such as Electronic Stability Control (ESC 39
). If
any of these other systems stops working, Pilot Assist will be automatically deactivated.
WARNING
With automatic standby mode, the driver is warned by an acoustic signal and a mes-sage on the instrument panel.
The driver must then regulate vehicle speed, apply the brakes if necessary,and maintain a safe distance to othervehicles.
Adaptive Cruise Control may go into standbymode if, e.g.: the driver opens the door.
the brake temperature is high.
the driver's hands are not on the steering wheel.
the parking brake is applied.
the engine speed (rpm) is too low/high.
the driver unbuckles the seat belt.
one or more of the wheels lose traction.
the camera/radar sensor is covered by snow or heavy rain (the camera lens/radarwaves are blocked).
your vehicle's speed goes under 5 km/h(3 mph) and Pilot Assist cannot determineif the vehicle ahead is stationary or if it isanother object, e.g. a speed bump.
your vehicle's speed goes under 5 km/h(3 mph) and the vehicle ahead turns sothat Pilot Assist no longer has a vehicle tofollow.
Related information

Pilot Assist
* (p. 285)
Selecting and activating Pilot Assist
*
(p. 288)
Deactivating Pilot Assist
* (p. 289)
Pilot Assist
* limitations (p. 291)
38
Depending on market, this function can be either standard or optional.
39 Electronic Stability Control

DRIVER SUPPORT
* Option/accessory.299
Deactivation of the Auto-hold brake function
In certain situations, auto-hold will be deacti- vated when the vehicle is at a standstill andthe function will go into standby mode. Thismeans that the brakes will be released and thevehicle could begin to roll. The driver mustactively apply the brakes to keep the vehiclestationary. This can occur if:
the driver depresses the brake pedal
the parking brake is applied
the gear selector is moved to the
P, N or R
positions
the driver puts the function in standby mode.
Auto Activate Parking BrakeIn certain situations, the parking brake will beapplied to keep the vehicle at a standstill. This occurs if the function is keeping the vehi- cle stationary using the brakes and:
the driver opens the door or unbuckleshis/her seat belt
the function has kept the vehicle at astandstill for more than approx. 5 minutes
the brakes overheat
the driver switches off the engine man-ually.
Related information
Driver support systems (p. 266)
Adaptive Cruise Control
* (p. 276)
Pilot Assist
* (p. 285)
Brake functions (p. 382)
Drive mode for driver support The driver can choose different drive modes to determine how driver support shouldmaintain a time interval to the vehicle ahead.
Settings are made using the
DRIVE MODE
controls. Select one of the following:

Eco - Driver support will focus on provid-
ing good fuel economy, which will increase the time interval to the vehicleahead.

Comfort - Driver support will focus on fol-
lowing the set time interval to the vehicle ahead as smoothly as possible.

Dynamic* - Driver support will focus on
following the set time interval to the vehi- cle ahead more exactly, which could meanfaster acceleration and heavier braking.
Related information
Driver support systems (p. 266)
Drive modes
* (p. 399)
Setting time interval to the vehicle ahead(p. 297)