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Possible cause Drive condition Service procedure
Opera-
tion
Driving immediately after starting engine.
The gyro (angular velocity sensor)
needs about 15 seconds after the
engine is started to precisely sense
the angular velocity. Directional
sensing errors will occur if the
vehicle is moved immediately after
starting the engine. The position
marker may indicate inaccurate
position.
Wait a few moments between
starting the engine and actually
driving the vehicle.
Continuous driving for long distances (non-stop)
When the vehicle is driven continu-
ously without stopping over a long
distance, errors in directional sens-
ing may occur. The position marker
may indicate inaccurate position.
Stop the vehicle. Perform
“SPEED CALIBRATION” (EL-
429).
Rough or violent driving
Wheel spinning (peeling out) or simi-
lar rough driving techniques can
adversely affect sensing accuracy.
The position marker may indicate
inaccurate position.
If the position marker does not
move to the correct position
even after the vehicle has been
driven approximately 10 km (6
miles), perform “ADJUST CUR-
RENT LOCATION” (EL-431).
Posi-
tional
calibra-
tion pro-
cedures
Positional calibration precision
SEL701V
If current vehicle location is roughly
set, the system may be unable to
locate the road that the vehicle is
traveling on. (This is especially true
in an area where there are many
roads.)
Perform “ADJUST CURRENT
LOCATION” (EL-431) within a
precision standard of 1 mm
(0.04 in) on the display.
Note: During calibration, use
the most detailed map pos-
sible.
Position calibration direction
SEL702V
When calibrating the position, check
the vehicle direction. If the vehicle
direction is not correct, subsequent
precision of current location will be
affected.
Perform “ADJUST CURRENT
LOCATION”, refer to EL-431.
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
NAVIGATION SYSTEM
This Condition is Not Abnormal (Cont’d)
EL-447
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