2020 VOLVO S90 ignition

STARTING AND DRIVING
418
Emission controls
Three-way catalytic converter
Keep your engine properly tuned. Certain engine malfunctions, particularly involvingthe electrical, fuel or distributor ignitionsystems, may cause unusually high three-way catalytic converter temperatures. Donot continue to operate your vehicle if youdetect engine misfire, noticeable loss ofpower or other unusual operating condi-tions, such as engine overheating or back-firing. A properly tuned engine will helpavoid malfunctions that could damage thethree-way catalytic converter.
Do not park your vehicle over combustiblematerials, such as grass or leaves, whichcan come into contact with the hotexhaust system and cause such materialsto ignite under certain wind and weatherconditions.
Excessive starter cranking (in excess ofone minute), or an intermittently firing orflooded engine can cause three-way cata-lytic converter or exhaust system over-heating.
Remember that tampering or unauthor-ized modifications to the engine, theEngine Control Module, or the vehicle maybe illegal and can cause three-way cata-lytic converter or exhaust system over-heating. This includes: altering fuel injec- tion settings or components, alteringemission system components or locationor removing components, and/or repeateduse of leaded fuel.
NOTE
Unleaded fuel is required for vehicles with three-way catalytic converters.
Heated oxygen sensorsThe heated oxygen sensors monitor the oxy- gen content of the exhaust gases. Readings are fed into a control module that continuouslymonitors engine functions and controls fuelinjection. The ratio of fuel to air into the engineis continuously adjusted for efficient combus-tion to help reduce harmful emissions.
Related information

Octane rating (p. 416)
Fuel (p. 415)
Overheating of engine and transmission
In certain driving conditions, such as driving in mountainous areas or hot weather, there isa risk of the engine or transmission overheat-ing, especially when carrying heavy loads.
Engine power may be temporarily limited.
Remove any auxiliary lights mounted in front of the grille when driving in hotweather.
If the temperature in the engine's coolingsystem becomes too high, a warning sym-bol will appear in the instrument panel along with the message
Engine
temperature High temperature Stop
safely. Pull over to a safe location and let
the engine idle for a few minutes to cool down.
If the message
Engine temperature
High temperature Turn off engine orEngine coolant Level low, turn off
engine is displayed, stop the vehicle and
turn off the engine.
If the transmission begins to overheat, an alternative gear shifting program will beselected. An integrated protective functionwill also be activated, the warning symbolwill illuminate and the message
Transmission warm Reduce speed to
lower temperature or Transmission hot
Stop safely, wait for cooling will be dis-

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419
played in the instrument panel. Follow the recommendations given by reducingspeed or stopping the vehicle safely andletting the engine idle for a few minutes tolet the transmission cool.
If the vehicle begins to overheat, the airconditioning may be temporarily switchedoff.
After a prolonged period of driving indemanding conditions, do not turn off theengine immediately after stopping.
NOTE
It is normal for the engine's cooling fan to operate for a short time after the engine isswitched off.
Symbols in the instrument panel
Symbol Meaning
High engine temperature. Follow the recommendations provided.
Low coolant level. Follow the recommendations provided.
Transmission hot/overheated/ cooling. Follow the recommen-dations provided.
Related information
Refilling coolant (p. 556)
Preparing for a long trip (p. 412)
Battery drain
The electrical functions in the vehicle drain the battery to varying degrees. Avoid usingignition mode II when the engine is switched
off. Use ignition mode I instead, as this uses
less electrical current.
Note that certain accessories may also drain power from the electrical system. Do not usefunctions that use a lot of electrical currentwhen the engine is turned off. Examples ofsuch functions are: blower
headlights
windshield wipers
audio system (especially at high volume).
If the starter battery voltage is low, a message is shown in the driver display. The vehicle'senergy-saving function will then turn off orreduce certain functions, such as the blowerand/or the audio system.
–Charge the battery by starting the engine and let it run for at least 15 minutes (driv-ing charges the battery faster than lettingthe engine idle).
Related information
Start battery (p. 567)
Ignition modes (p. 381)

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Jump starting using another battery If the start battery is discharged, current from another battery can be used to start the vehi-cle.
Jumper cable connecting points. Engine compart- ment appearance may vary depending on vehiclemodel and equipment level.
To avoid short circuits or other damage, the following steps are recommended when jumpstarting the battery using another battery:
1. Put the ignition in mode 0.
2. Make sure the auxiliary battery (the bat- tery used to jump start the discharged battery) has a voltage of 12 volts. 3. If the auxiliary battery is in another vehicle,
turn off that vehicle's engine and makesure that the vehicles are not touchingeach other.
4. Clamp the red jumper cable onto the auxil- iary battery's positive (+) terminal (1).
CAUTION
Connect the jump cable carefully to pre- vent short circuits with other componentsin the engine compartment.
5. Fold back the cover over your vehicle'spositive (+) jump start terminal (2).
6. Clamp the other end of the red jumper cable to your vehicle's positive (+) jump start terminal (2).
7. Clamp the black jumper cable onto the auxiliary battery's negative (-) terminal (3).
8. Clamp the other end of the black jumper cable to your vehicle's negative (-) groundpoint (4).
9. Make sure the jumper cables are securely attached to help prevent sparks whilejump starting. 10. Start the engine of the assisting vehicle
and let it run for a few minutes at a higheridling speed than normal, about1500 rpm.
11. Start the engine of the vehicle with the dead battery.
CAUTION
Do not touch the connections between the cable and the vehicle during the startattempt. Risk of sparking.
12. Remove the jumper cables in the reverseorder ‒ first the black cables and then the
red cables. Make sure that none of the clamps of the black jumper cables come into contactwith either vehicle's positive (+) jump startterminals or either of the red jumpercable's connected clamps.

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421
WARNING
High voltage may be dangerous if handled incorrectly. Do not touch anything on bat-teries that is not clearly described in thisOwner's Manual. Never use a 48 V support battery to jump start the vehicle.
External electrical equipment may notunder any circumstance be connectedto the 48 V battery.
Only a workshop may replace or per-form service on the 48 V battery – anauthorized Volvo workshop is recom-mended.
WARNING
PROPOSITION 65 WARNING!
Battery
posts, terminals, and related accessories contain lead and lead compounds, chemi-cals known to the state of California tocause cancer and reproductive harm. Washhands after handling.
WARNING
Batteries generate hydrogen gas, which is flammable and explosive.
Do not connect the jumper cable toany part of the fuel system or to anymoving parts. Avoid touching hotmanifolds.
Battery fluid contains sulfuric acid. Donot allow battery fluid to contact eyes,skin, fabrics or painted surfaces.
If contact occurs, flush the affectedarea immediately with water. Obtainmedical help immediately if eyes areaffected.
Never expose the battery to open flameor electric spark. Do not smoke nearthe battery. Failure to follow theinstructions for jump starting can leadto injury.
NOTE
If the starter battery has been discharged to the extent that the vehicle does not havenormal electrical functions and the enginemust then be jump-started with an externalbattery or a battery charger, the Start/Stopfunction may remain activated. If the Start/Stop function shortly thereafter auto-stopsthe engine, there is a huge risk that auto-start of the engine will fail due to insuffi-cient battery capacity since the battery hadnot had time to recharge. If the vehicle has been jump-started or if there has not been enough time for thebattery to be charged with a batterycharger, the Start/Stop function should betemporarily deactivated until the batteryhas been recharged by the vehicle. At anambient temperature of about +15°C(about 60°F), the battery must be chargedby the vehicle for at least one hour. Atlower ambient temperatures, the chargingtime can increase to 3-4 hours. It is advisa-ble to charge the battery with an externalbattery charger.
Related information
Starting the vehicle (p. 378)
Ignition modes (p. 381)
Adjusting the steering wheel (p. 193)

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Selecting ignition mode (p. 382)
Support battery (p. 571)
Towing using a towline
This section refers to one vehicle being towed behind another using a towline.
Before towing another vehicle, check applica- ble speed limit regulations.
Preparations and towing
CAUTION
Vehicles with the small gear selector can- not shift out of the P position when theengine is off. Contact an authorized Volvoworkshop or a professional towing com-pany for assistance towing the vehicle.
CAUTION
Note that the vehicle must always be towed with the wheels rolling forward.
Do not tow a vehicle with automatictransmission at a speed greater than80 km/h (50 mph) or for a distancegreater than 80 km (50 miles).
WARNING
Ignition mode
II must be active – all
airbags are deactivated in ignition mode I.
Always have the remote key in thevehicle when it is towed.
WARNING
The brake and steering servos do not work when the engine is off – it takesabout 5 times more pressure on the brakepedal and steering requires much moreeffort than normal.
1. Turn on the hazard warning flashers.
2. Attach the towline to the towing eyelet.
3. Put the vehicle in ignition mode II – with-
out pressing the brake pedal, turn the start knob clockwise and hold it there for about4 seconds. Release the knob, which willautomatically return to its original position.
4. Move the gear selector to neutral (N) and release the parking brake. If the battery charge level is too low, it may not be possible to release the parkingbrake. Connect an auxiliary battery to thevehicle if the battery is discharged.
> The towing vehicle can now start driv-ing.

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423
5. Keep the towline taut when the towing
vehicle slows down by applying light pres- sure to the brake pedal. This will helpavoid jarring movements.
6. Be prepared to apply the brakes to stop the vehicle.
Jump startingDo not tow the vehicle to start the engine. Usean auxiliary battery if the start battery's chargelevel is so low that the engine cannot bestarted.
CAUTION
Attempting to tow with the engine running could result in damage to the three-waycatalytic converter.
Related information
Attaching and removing the towing eyelet (p. 423)
Hazard warning flashers (p. 157)
Recovery (p. 425)
Jump starting using another battery(p. 420)
Selecting ignition mode (p. 382)
Transmission (p. 391)
Attaching and removing the towing eyelet
Use the towing eyelet when towing. Screw the towing eyelet securely into place in thethreaded outlet behind the cover on the right-hand side of the front and rear bumpers.
NOTE
If the vehicle is equipped with a towbar, there is no rear attachment for the towingeye.
Attaching the towing eyelet
Take out the towing eyelet, which is stored in a foam block under the floor inthe cargo compartment.
Front: Remove the cover by pressing on the mark with a finger.
> The cover turns along its center line and can then be removed.

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STARTING AND DRIVING
* Option/accessory.
426 HomeLink
®
is delivered integrated in the rear-
view mirror. The HomeLink ®
panel consists of
three programmable buttons and an indicator light in the mirror. For more information about HomeLink ®
,
please visit: www.HomeLink.com or call 1-800-355-3515. Save the original remote controls for future programming (e.g. for use in another vehicle).It is also advisable to delete the button pro-gramming if the vehicle is sold.
Related information
Using HomeLink ®
* (p. 428)
Programming HomeLink ®
* (p. 426)
Type approval for HomeLink ®
* (p. 429)
Programming HomeLink ®
*19
Follow these instructions to program HomeLink ®
, reset all programming, or pro-
gram individual buttons.
NOTE
In some vehicles, the ignition must be on or in the "accessory position" before HomeLink ®
can be programmed or used. It
can be a good idea to put new batteries in the remote control being replaced by HomeLink ®
for faster programming and
better radio signal transmission. TheHomeLink ®
buttons should be reset before
programming.
WARNING
While HomeLink ®
is being programmed,
the garage door or gate being programmed may be activated. Make sure that no one isnear the door or gate during programming.When programming a garage door opener,it is advised to park outside of the garage. 1. Point the remote control at the
HomeLink ®
button to be programmed and
hold it about 2-8 cm (1-3 inches) from the button. Do not obstruct the HomeLink ®
indicator light. Note: Some remote controls are more
effective at programming HomeLink ®
from
a distance of about 15-20 cm (6-12 inches). Keep this in mind if you experi-ence any programming difficulties.
2. Press and hold both the remote control button and the HomeLink ®
button to be
programmed.
19 Certain markets only.

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* Option/accessory.
428
Related information
Using HomeLink ®
* (p. 428)
HomeLink ®
* (p. 425)
Type approval for HomeLink ®
* (p. 429)Using HomeLink ®
*21
Once HomeLink ®
is programmed, it can be
used instead of the separate remote controls.
Press and hold the programming button. The garage door, gate, alarm system, etc. will beactivated (this may take several seconds). Ifthe button is held down for more than 20 sec-onds, reprogramming will begin. The indicatorlight will glow steadily or flash when the but-ton has been pressed. The original remotecontrols may be used concurrently with HomeLink ®
if desired.
NOTE
When the ignition is switched off, HomeLink ®
will be active for at least
7 minutes.
NOTE
HomeLink ®
cannot be used if the vehicle is
locked and the alarm is armed * from the
outside.
WARNING
If you use HomeLink ®
to open a garage
door or gate, be sure no one is near the gate or door while it is in motion.
Do not use HomeLink ®
with any
garage door opener that lacks safetystop and reverse features as requiredby US federal safety standards (thisincludes any garage door opener modelmanufactured before April 1, 1982). Agarage door that cannot detect anobject - signaling the door to stop andreverse - does not meet current U.S.federal safety standards. For moreinformation, contact HomeLink at:www.homelink.com.
Related information
HomeLink ®
* (p. 425)
Programming HomeLink ®
* (p. 426)
Type approval for HomeLink ®
* (p. 429)
21
Certain markets only.