User Manual - Page 901

For 2001 XTERRA.

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AEC933A
Component Description
NGEC0698
The fuel tank temperature sensor is used to detect the fuel tem-
perature inside the fuel tank. The sensor modifies a voltage signal
from the ECM. The modified signal returns to the ECM as the fuel
temperature input. The sensor uses a thermistor which is sensitive
to the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.
SEF012P
<Reference data>
Fluid temperature
°C(°F)
Voltage* (V) Resistance (k)
20 (68) 3.5 2.3 - 2.7
50 (122) 2.2 0.79 - 0.90
*: These data are reference values and are measured between ECM terminal 60
(Fuel tank temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECMs
transistor. Use a ground other than the ECM terminals, such
as the ground.
On Board Diagnosis Logic
NGEC0699
Malfunction is detected when an excessively high or low voltage is
sent to ECM, rationally incorrect voltage is sent to ECM, compared
with the voltage signals from engine coolant temperature sensor
and intake air temperature sensor.
POSSIBLE CAUSE
NGEC0699S01
Harness or connectors
(The sensor circuit is open or shorted.)
Fuel tank temperature sensor
DTC P0180 FUEL TANK TEMPERATURE SENSOR
VG33E
Component Description
EC-901
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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