spark plugs VOLVO XC90 TWIN ENGINE 2018 Owners Manual

MAINTENANCE AND SERVICE
609
Engine compartment overview
This overview shows some service-related com-
ponents. Some of the components included in the vehi-
cle's electric drive system are located in the
engine compartment. Exercise caution when
accessing the engine compartment and only
touch what is required for normal maintenance.
WARNING Orange wiring may only be handled by quali-
fied personnel.
WARNING
Several components in the vehicle work with
high voltage that can be hazardous in case of
an incorrect procedure.
• Do not touch anything that is not clearly
described in this Owner's Manual.
• Be careful when checking/filling fluids in
the engine compartment. The layout of the engine compartment may vary depend-
ing on model and engine variant.
Coolant expansion tank
Brake fluid reservoir (located on the driver's
side)
Washer fluid filler pipe
11 Fusebox
Air filter
Engine oil filler pipe
WARNING Bear in mind that the cooling fan (located at
the front of the engine compartment behind
the radiator) may start or continue running
automatically up to about 6 minutes after the
engine is turned off.
Always entrust engine washing to a workshop
– an authorized Volvo workshop is recom-
mended. If the engine is hot, there is a risk of
fire.
WARNING
The ignition system works with extremely high
and dangerous voltages. The vehicle electrical
system should always be in ignition mode 0
when work in being performed in the engine
compartment.
Do not touch any spark plugs or ignition coils
when the vehicle electrical system is in igni-
tion mode II or when the engine is warm.
Related information
•
Opening and closing the hood (p. 607)
• Filling washer fluid (p. 650)
• Refilling coolant (p. 612)
• Fuses in the engine compartment (p. 622)
• Checking and filling engine oil (p. 611)
• Ignition modes (p. 427) 11
Fill the washer fluid at regular intervals, e.g. when refueling.

MAINTENANCE AND SERVICE
625Function
AA Heated oxygen sensor, front;
heated oxygen sensor, rear
15Oil pump solenoid; A/C mag-
netic coupling; heated oxygen
sensor (center)
15–
–Engine control module
20Ignition coils; spark plugs 15
–
––
–Transmission oil pump control
module
30Vacuum pump control module 40
Transmission actuator
25–
––
––
–A
Ampere
B Not Excellence
C Excellence
D LED (Light Emitting Diode)
Related information
• Fuses and fuseboxes (p. 620)
• Replacing fuses (p. 621)