roof TOYOTA COROLLA iM 2018 Accessories, Audio & Navigation (in English)

7. NAVIGATION SYSTEM INFORMATION
1. LIMITATIONS OF THE NAVIGATION SYSTEM
7. NAVIGATION SYSTEM INFORMATION



This navigation system calculates the
cu rrent vehicle position using satellite
s ignals, various vehicle signals, map
data, etc. However, an accurate
positi on may not be shown depending
on satellite condition, road
configuration, vehicle condition or
other circumstances.
The Gl obal Pos iti onin g System (GPS)
deve loped and op erated by the U.S.
Departme nt o f D efense prov ides an
a ccurate current vehicle pos ition, normal ly
using 4 or more sate llites, and in some
case 3 satellites. The GPS system has a
certain level of inaccuracy. While the
navi gation system w ill compe nsate for this
most of th e time, occasion al po sitioning
errors of up to
1 00 m (300 feet) can and shou ld be
ex pe cted. Gen erally, p osit ion errors w ill
b e c orrected w ith in a few seconds.

The GPS signal may be physic ally
ob structed, l ead ing to inaccura te veh icle
posi tion on t he map d isplay. Tunne ls,
ta ll buil dings, trucks, or even the
p lacement of obje cts on the instrume nt
pan el may obstruct the GPS signals.
Th e GPS satel lites may not send sign als
du e to r epairs or improvemen ts be ing
ma de to them.
Even when the navigation system is
rece iving clear GPS si gnals, the v ehicle
po sition ma y not be shown accurately or
i na ppr opri ate route guidance may occur in
som e cases.

NOTICE

The ins tallat ion of wi ndow tint ing may
obstr uct the GPS s ignals . Mos t window
tinting co ntains som e me tallic cont ent that
w ill int erfere with GP S si gnal re ception of
the antenna . We advise agai nst the use of
win dow ti nting on vehicles eq uip ped w ith
n avi gation s ystems.

 Accurate current ve hicle position may no t
be sh own in the following cases:
• When drivin g o n a smal l a ngled Y-
shap ed ro ad.
• When driving on a wi nding road.
• When driving on a sli ppery ro ad such as
in sand, gravel , snow, et c.
• When driving on a long s traight ro ad.
• When highway and surf ace streets run
in p arallel.
• After moving by ferry or vehi cle carri er.
• When a long route is searc hed during
hi gh speed drivi ng.

• Whe n driv ing wi thout setting the cu rrent
position ca librat ion co rrectly.
• After re peating a change of di rection by
going for
war d and backward, or t urning
on a turntable in the park ing lo t.
• When leaving a co vered parking lot or
p ark ing garage.
• When a roof carrie r is instal led.
• When driving w ith tir e cha ins i nst alled.
• When the t ires ar e wor n.
• After replacing a tire or t ires.
• Whe n us ing tire s tha t ar e sma lle r or
larg er than the fa ctory sp ecifi catio ns.
• When the tire pressur e in any of the f our
ti res is not corre ct.
1. LIMITATIONS OF THE NAVIGATION SYSTEM

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