Maserati Grandturismo Sport. Service Manual - part 11

5

168

Temperature

The temperature grades are “A” (the 
highest), “B”, and “C”, representing 
the tire resistance to the generation 
of heat and its ability to dissipate 
heat when tested under controlled 
conditions on a specified indoor 
laboratory test wheel. Sustained high 
temperature can cause the tire to 
deteriorate and can reduce tire life. 
In addition, excessive temperature 
can lead to sudden tire failure. The 
grade “C” corresponds to a level of 
performance which all passenger 
car tires must meet under the 
Federal Motor Safety Standard No. 
109. Grades “B” and “A” represent 
higher levels of performance on 
the laboratory test wheel than the 
minimum required by law.

The temperature grade for 
this tire is established for a 
tire that is properly inflated 

and not overloaded. Excessive speed, 
underinflation, or excessive loading, 
either separately or in combination, 
can cause heat buildup and possible 
tire failure.

Other tire markings

Manufacturer’s name.
Tire model.
Size information.
Example:
245 = nominal section width in mm. 
35 = height of tire cross-section 
expressed as percentage of width
R = radial construction
20 = rim diameter in inches.
ZR= speed rating indicating the speed 
at which the tire can carry the load 
corresponding to the load capacity 
index.

Tire placard/label

The tire and loading Information label 
stuck on the driver’s door jamb specifies 
the correct size and pressure of tires 
to be used on the GranTurismo. It also 
specifies the total weight the car can 
carry, called the car capacity weight. 
This includes the weight of the driver, 
passenger and luggage.
For tire pressure information, refer also 
to the ‘Technical Data’ section of this 
manual.
Also found on the driver’s door jamb is 
the Certification label, which stipulates 
the Gross Vehicle Weight Rating 
(GVWR). The GVWR includes the weight 
of the car, occupants, fuel and luggage. 
Never exceed the GVWR or the Gross 
Axle Weight Rating (GAWR) for either 
the front or rear axle. The maximum 
load which may be carried in the rear 
luggage compartment is 66 lbs (30 kg). 

Note That the GranTurismo SPORT is 
not designed to tow a trailer, and no 
such attempt should be made.

WARNING: Do not exceed the GVWR, 
or front or rear GAWR. Exceeding 
these limits may lead to poor 
handling, vehicle instability or tire 
damage which could cause a crash in 
which you or others could be seriously 
injured or killed. 

5

169

Information on tire care, including 
maintenance and safety practices can 
also be found on page 221; tire and 
wheel size information is reported 
on page 205 and the information on 
the tire pressure monitoring system 
(TPMS) can be found on page 47.

WARNING: In order to achieve optimal 
handling characteristics, the wheel 
and tire sizes on the GranTurismo 
are different at front and at the 
rear. This means that interchanging 
of wheels and tires between axles 
is not permissible. Failure to respect 
this requirement will adversely affect 
vehicle handling and may result in an 
accident in which you or others could 
be killed or seriously injured.

Importance of proper inflation 
pressure

-  Use a good quality tire pressure 

gauge and always replace the 
tire valve dust cap to prevent 
the ingress of dirt and moisture 
into the valve, which could cause 
leakages. Many gas stations provide 
tire inflation facilities.

-  The tires should be regularly 

inspected for signs of cuts, 
abrasions or other damage, and for 
any uneven tread wear patterns. 
Uneven treadwear may indicate 
that the suspension geometry or 
dampers require attention from 
your Authorized Maserati Dealer.

-  Overloading your tires can cause 

overheating as a result of too much 
friction. You could have a blowout 
and a serious accident in which you 
could be killed or seriously injured. 
See ‘Tire Placard Label’.

-  Underinflated tires pose the same 

danger as overloaded tires. The 
resulting accident could cause 
serious injury, or death. Check 
all tires frequently and maintain 
the recommended pressure. Tire 
pressures should be checked only 
when the tires are cold.

-  Overinflated tires are more likely 

to be cut, punctured or broken 

by a sudden impact - such as 
hitting a pothole. Keep tires at the 
recommended pressure.

-  Installing improper tires on your 

vehicle can affect handling and 
stability. This can cause a crash in 
which you can be killed or seriously 
injured.

-  Always use the size and type of 

tires recommended in this manual.

-  Using incorrect tires or tires which 

are excessively worn or improperly 
inflated can cause a crash in which 
you can be killed or seriously 
injured.

When driving on wet roads, surface 
water is squeezed out from between 
the tire and road. However, excessive 
speed or water depth can overwhelm 
the water clearing capability of the 
tread and lead to a condition called 
‘aquaplaning’ or ‘hydroplaning’, 
where the tire rides on a film of water 
and provides little or no grip on the 
road surface, leading to a loss of 
control. This condition is more likely 
to occur with worn tires having little 
depth of tread, or with incorrect 
tire pressures. Drivers should always 
check on tire wear and condition, 
and moderate their speed in adverse 
weather conditions.

5

170

Tire care

Wear indicators are molded into 
the bottom of the tread grooves at 
intervals around the tire, indicated 
by small pointers on the outer tread 
blocks. The tires should be replaced 
before being worn to this minimum 
legal tread depth.
The cold tire pressures should be 
checked every week, or every 1000 
miles (1700 km), whichever is the 
sooner, and corrections made as 
necessary. See ‘Technical Data’ at 
the back of the handbook for tire 
pressures. Underinflation will cause 
excessive wear, rapid deterioration of 
the tire sidewalls and heavy steering, 
whereas overinflation results in a 
hard ride and in creased susceptibility 
to tire damage. Both conditions will 
cause a degradation in the handling 
qualities.

Vehicle load limits:

Federal regulations require the 
following statement in this manual:
“Steps for Determining Correct Load 
Limit“ 
1) Locate the statement “The 

combined weight of occupants and 
cargo should never exceed XXX 
kg or XXX lbs.” on your vehicle’s 
placard.

2) Determine the combined weight of 

the driver and passengers that will 
be riding in your vehicle. 

3) Subtract the combined weight of 

the driver and passengers from XXX 
kg or XXX lbs. 

4) The resulting figure equals the 

available amount of cargo and 
luggage load capacity. For example, 
if the “XXX” amount equals 1400 
lbs. and there will be five 150 lb 
passengers in your vehicle, the 
amount of available cargo and 
luggage load capacity is 650 lbs. 
(1400-750 (5 x 150) = 650 lbs.)

5) Determine the combined weight of 

luggage and cargo being loaded 
on the vehicle. That weight may 
not safely exceed the available 
cargo and luggage load capacity 
calculated in Step 4.

NOTE: The vehicle should not be used 
to tow a trailer.

Winter tires

These tires are specially designed for 
driving on snow and ice and should 
be fitted to replace the ones supplied 
with the vehicle.

Only use winter tires having 
the same dimensions as 
those provided with the 

vehicle or as indicated on page 205.

Your Authorized Maserati Dealer is 
available to provide suggestions as to 
the types of tires most suited to the 
use foreseen by the Customer.
For the type of tires to use, inflation 
pressures and relative specifications 
for winter tires, carefully follow 
the indications found in the 
section “Capacities and technical 
specifications”.
The features of these winter tires are 
strongly reduced if the tread depth 
is less than 0.2 in (4 mm). In this case, 
they should be replaced.

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171

The specific features of the winter 
tires lead to lower performance under 
normal environmental conditions or 
on long highway trips, compared to 
the standard tires.
Therefore, they should only be fitted 
for their intended use, for which they 
have been approved.

Fit identical (manufacturer 
and tread) tires on all four 
wheels, in order to help 

ensure safe driving, braking and good 
handling.

Remember that the direction 
of tire rotation should not be 
reversed. 

Snow chains

The use of snow chains is subject to 
local regulations.
If the use as snow chians is allowed, 
to use small-sized snow chains with a 
maximum projection of 0,35 in (9 mm) 
beyond the tire tread.
The chains should be fitted only on 
the driving wheel tires (rear wheels).
Check chain tension after driving for 
a distance of about 55 yd (50 m) with 
the chains fitted.

Snow chains: brand/type

Konig/Supermagic

 

Rear tire

285/35 ZR20

285/40 ZR19 (°)

(°) Tire available on request

WARNING: Before purchasing or using 
snow chains, we recommend that you 
contact your Authorized Maserati 
Dealer for information.

WARNING: Keep a moderate speed 
when using snow chains. Do not 
exceed 30 mph (50 km/h). Avoid holes 
in the road, do not drive over steps 
or sidewalks and do not drive on long 
road stretches without snow. This will 
help prevent damage to the vehicle 
and the road surface. 

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172

Useful accessories to 
keep in the vehicle

We recommend that you keep in the 
vehicle:
-  first aid kit containing alcohol-free 

disinfectant, sterile gauze pads, 
gauze rolls, bandages, etc.;

- electric 

flashlight;

- blunt-tipped 

scissors;

- heavy-duty 

gloves.

The objects described and other 
essential objects can be obtained 
locally. 

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173

In an emergency

Emergency starting 

174

Toolkit 175
If a tire is punctured  

175

If an exterior light turns off  

176

If an interior light goes out 

179

If a fuse blows 

182

If the battery is dead  

193

If you have to jack up the vehicle  

194

If you have to tow the vehicle  

195

In the event of an accident  

196

6

174

Emergency starting

If the MASERATI CODE fails to 
deactivate the engine immobilizer, 
the warning light CODE 

 will 

illuminate permanently, the OBDII  
warning light 

 will go off after 

18 seconds and then will come on 
immediately and the engine will 
not start. To start the engine, it is 
necessary to follow the emergency 
start procedure.

WARNING: We recommend that you 
carefully read the entire procedure 
before performing it. If you make a 
mistake, you should turn the ignition 
key to STOP (OFF) and repeat the 
operations from the beginning (step 
1).

1)  Read the 5-digit electronic code 

found on the CODE CARD. 

2)  Turn the ignition key to MAR 

(ON): the CODE 

 and OBDII 

 warning lights are on.

3)  Press the accelerator pedal 

fully down and keep it pressed. 
Approximately 8 seconds later, 
the OBDII warning light 

 goes 

off. Release the accelerator and 
get ready to count the number 
of times the OBDII warning light 

 flashes.

4)  As soon as the displayed number 

of flashing is equal to the first 
digit of your CODE CARD, depress 
the accelerator and hold it until 
the OBDII warning light 

 goes 

off, after being illuminated for 
approximately 4 seconds; You 
can now release the accelerator 
pedal.

5)  The OBDII warning 

 light 

starts flashing again. As soon as 
the number of flashing is equal 
to the second digit of your CODE 
CARD, depress the accelerator 
pedal and hold it down.

6)  Proceed in the same manner for 

the remaining digits in the code 
on the CODE CARD.

7)  When the last digit has been 

entered, keep the accelerator 
pedal pressed down. The OBDII 
warning 

 light illuminates for 

4 seconds and then goes off; You 
can now release the accelerator 
pedal.

8)  A quick flashing of the OBDII 

warning light 

 (about 4 

seconds) confirms that the 
operation has been performed 
correctly. 

9)  Start the engine turning the key 

from MAR (ON) to AVV (START). 

If the OBDII warning light 

 

remains illuminated, turn the key to 
STOP (OFF) and repeat the procedure 
from step 1.
This procedure can be repeated an 
unlimited number of times.

WARNING: After an emergency start, 
we recommend that you contact your 
local Authorized Maserati Dealer, 
otherwise you will have to perform 
the emergency start procedure every 
time the engine is started.

B

A

6

175

Toolkit

The vehicle is equipped with the 
following tools:
-  toolkit, housed in the luggage 

compartment;

-  tire repair kit; 
- reflecting 

triangle. 

The toolkit, housed under the floor 
panel, contains:
-  8 + 10 mm open end wrench;
-  13 + 17 mm open end wrench; 
-  double slot + Phillips-head 

screwdriver;

- tow 

hook;

-  tool for electric parking brake 

actuator release.

If a tire is punctured 

For the tire repair procedures see the 
instructions included in the tire repair 
kit.

Note: The compressor power plug can 
be inserted either in the 12V socket A 
housed in the luggage compartment 
or in the cigarette lighter socket B, 
inside the passenger compartment. 

A

D

E

C

B

B

A

C

D

E

6

176

If an exterior light turns 
off 

WARNING: Before replacing a 
light bulb, make sure that the 
corresponding fuse is in proper 
working order. For replacement, use 
only genuine new light bulbs having 
the same characteristics as the bulb 
being replaced.

Front light clusters

To access the front light clusters from 
underneath the vehicle, you must first 
remove the wheel housing covering.
The light bulbs of the front light 
clusters are arranged as follows:
A  - Side marker bulb
B  - Direction indicator light bulb
C  - Position light and DRL (*) LED
D - Bi-xenon low-beam/high-beam 

bulb 

E  - FTP bulb, headlight flashing.

(*) On vehicles for the Canadian 
market DRL are always enabled.

To replace the Xenon light 
bulbs, the low and high 
beam light bulbs and 

to check the system, contact an 
Authorized Maserati Dealer only: 
RISK OF ELECTRICAL SHOCK! 

It is advisable to contact your 
Authorized Maserati Dealer also for 
replacing the other lights. 

Rear light clusters 

The light bulbs of the rear light 
clusters are arranged as follows:
A  - Position light LED
B  - Stop light LED
C  - Reverse light bulb
D  - Direction indicator LED
E  - Rear fog light bulb.

F

G

2

1

I

H

J

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177

To replace a light bulb:
1)  Lift the engine compartment lid.
2)  Open the door on the covering 

panel, in position with the light 
cluster.

3)  Rotate the bulb holder F 

counterclockwise and slide it out.

4)  Remove the bulb G by gently 

pushing it and rotating it 
counterclockwise.

5)  Insert the new bulb by slightly 

pushing it and rotating it 
clockwise.

6)  Insert the bulb holder and rotate 

it clockwise.

7)  Close the door on the covering 

panel.

Direction indicator lights

To replace the direction indicator light 
bulb (5W):
1)  Push the direction indicator 

forward to compress the spring 
clip H. 

2)  Take out the rear part of the 

indicator by releasing the 
retaining tab I and remove the 
unit.

3)  Remove the bulb holder J turning 

it counterclockwise. 

K

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178

4)  Remove and replace the bulb K. 
5)  Refit the bulb holder turning it 

clockwise.

6)  Refit the direction indicator 

inserting first the retaining tab on 
the rear part and then pressing 
the front part until hearing the 
spring clip click into position.

WARNING: Proceed with care when 
removing the side direction indicator 
light to avoid damage to the vehicle 
body or to the indicator itself. 

Third stop light

In order to replace the bulb, the 
light cluster must be removed. It is 
therefore recommended that you 
contact your Authorized Maserati 
Dealer. 

License plate lights

To replace the license plate light bulb 
(C 5W):
1)  Undo the fastening screws for the 

lens/bulb holder unit.

2)  Remove the unit and replace the 

bulb. 

C

B

A

A

D

D

6

179

If an interior light goes 
out

WARNING: Before replacing a 
light bulb, make sure that the 
corresponding fuse is in proper 
working order. For replacement, use 
only genuine new light bulbs having 
the same rating as the bulb being 
replaced.

Front and rear dome light

To replace the bulbs:
1)  Use a screwdriver to gently pry it 

out at points A and remove the 
dome light.

2)  Replace the bulb concerned by 

rotating it: 

 

- timed light B 

 

- reading lights C.

3)  Refit the dome light inserting first 

the front side and the pushing 
the rear side into its seat. 

WARNING: When refitting the dome 
light, make sure that the electric wires 
are correctly positioned and do not 
interfere with the dome light edges 
and with the retaining tabs.

Courtesy mirror light

To replace the bulb (12V - 5W 
“torpedo” type):
1)  Remove the fixing frame by 

prying it out gently at points D.

2)  Replace the bulb.
3)  Refit the fixing frame by pressing 

it.

F

G

E

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180

Glove compartment, pocket-
change compartment and 
luggage compartment lights 

To replace the bulb:
1)  Remove the transparent cover 

by prying it out gently, using a 
screwdriver, at point E.

2)  Raise the cover F.

3)  Replace the bulb G.
4)  Refit the cover, inserting first the 

two-tab side and then pressing on 
the other side. 

H

L

M

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181

Courtesy lights (below door)

To replace the bulb:
1)  Use a screwdriver positioned at 

point H to pry out the light fixing 
frame.

2)  Rotate the bulb holder L and 

remove it. 

3)  Replace the pressure-fitted bulb 

M.

4)  Refit the bulb holder L inserting 

first the electrical connector side 
and then pressing on the other 
side to hook the clip. 

A

B

6

182

If a fuse blows

Replacing the fuses

When an electrical device is 
not functioning, check that the 
corresponding fuse is in proper 
working order. 
A  -  Fuse intact.
B  - Fuse blown. 

Replace the faulty fuse with a new 
one having the same rating (same 
color).
If the fault recurs, consult your 
Authorized Maserati Dealer.

Never replace a blown fuse 
with anything other than a 
sound fuse having the same 

rating/color.

Position of fuses/relays

The fuses/relays are located in various 
parts of the vehicle, namely: 
-  On the right-hand side of the 

luggage compartment.

-  Behind the glove compartment, to 

the left of the steering wheel.

-  In the luggage compartment next 

to the battery.

Fuse colors

dark 
yellow 

brown

red

light 
blue

yellow

white

green

Ampere

A5

A7.5

A10

A15

A20

A25

A30

Maxi Fuse colors

yellow

green

orange

red

blue

Ampere

A20

A30

A40

A50

A60

T15

T19

T14

T20

F11

F19

F14

F10

F15

F18

F23

F30

F21

F09

F84

F20

F16

F24

F87

F17

F22

F92

F91

F90

F89

F88

F97

F96

F95

F94

F93

F102

F101

F100

F99

F98

F107

F106

F105

F104

F103

F08

F07

F01

F04

F05

F06

F83

F03

F82

F81

F02

F85

T17

T31

T08

T09

T30

T07

T06

T16

T10

T05

T03

T02

C

B

A

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183

Fuses and relays inside the 
engine compartment

To access the fuses/relays, lift the 
engine compartment lid, remove the 
covering panel A, then undo the 4 
screws B to remove the cover C .

The fuses/relays are housed in 3 
control boxes.

The list of fuses and relays is shown in 
the following pages.

WARNING: If you need to wash the 
engine compartment, do not direct 
the jet of water for too long directly 
on the engine compartment ECU.