Infiniti I35 (A33). Manual — part 237
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SEF174Y
WITH CONSULT-II
NHEC0776S01
1)
Turn ignition switch ON.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 10 seconds.
If the result is NG, go to “Diagnostic Procedure”, EC-289.
If the result is OK, go to following step.
4)
Check “COOLAN TEMP/S” value.
If “COOLAN TEMP/S” is less than 60°C (140°F), the result will
be OK.
If “COOLAN TEMP/S” is above 60°C (140°F), go to the follow-
ing step.
5)
Cool engine down until “COOLAN TEMP/S” is less than 60°C
(140°F).
6)
Wait at least 10 seconds.
7)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-289.
WITH GST
NHEC0776S02
Follow the procedure “With CONSULT-II” above.
Diagnostic Procedure
NHEC0778
1
CHECK FUEL TANK TEMPERATURE SENSOR
1. Remove fuel level sensor unit.
2. Check resistance between fuel level sensor unit and fuel pump terminals 4 and 5 by heating with hot water or heat gun
as shown in the figure.
SEF587X
OK or NG
OK
©
GO TO 2.
NG
©
Replace fuel level sensor unit.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0181 FTT SENSOR
DTC Confirmation Procedure (Cont’d)
EC-289
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2
CHECK INTERMITTENT INCIDENT
I
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
I
Refer to Wiring Diagram, EC-293.
©
INSPECTION END
DTC P0181 FTT SENSOR
Diagnostic Procedure (Cont’d)
EC-290
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SEC082D
Component Description
NHEC0920
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>
Fuel temperature
°C (°F)
Voltage*
V
Resistance
k
Ω
20 (68)
3.5
2.3 - 2.7
50 (122)
2.2
0.79 - 0.90
*: This data is reference value and is measured between ECM terminal 75 (Fuel
tank temperature sensor) and body ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.
On Board Diagnosis Logic
NHEC0921
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0182
0182
Fuel tank temperature
sensor circuit low
input
An excessively low voltage from the sensor is sent
to ECM.
I
Harness or connectors
(The sensor circuit is open or
shorted.)
I
Fuel tank temperature sensor
P0183
0183
Fuel tank temperature
sensor circuit high
input
An excessively high voltage from the sensor is
sent to ECM.
DTC Confirmation Procedure
NHEC0922
NOTE:
If DTC Confirmation Procedure has been previously conducted,
always turn ignition switch OFF and wait at least 10 seconds before
conducting the next test.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0182, P0183 FTT SENSOR
Component Description
EC-291
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SEF174Y
WITH CONSULT-II
NHEC0922S01
1)
Turn ignition switch ON.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 10 seconds.
If the result is NG, go to “Diagnostic Procedure”, EC-294.
If the result is OK, go to following step.
4)
Check “COOLAN TEMP/S” value.
If “COOLAN TEMP/S” is less than 60°C (140°F), the result will
be OK.
If “COOLAN TEMP/S” is above 60°C (140°F), go to the follow-
ing step.
5)
Cool engine down until “COOLAN TEMP/S” is less than 60°C
(140°F).
6)
Wait at least 10 seconds.
7)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-294.
WITH GST
NHEC0922S02
Follow the procedure “With CONSULT-II” above.
DTC P0182, P0183 FTT SENSOR
DTC Confirmation Procedure (Cont’d)
EC-292
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