Nissan Quest E52. Instruction — part 510
EC-250
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0181 FTT SENSOR
2.
Wait at least 10 seconds.
3.
Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> GO TO 6.
6.
PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B)
Perform component function check. Refer to
EC-250, "Component Function Check"
NOTE:
Use the component function check to check the overall function of the FTT sensor circuit. During this check, a
1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
7.
PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-
dure before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
• Before performing the following procedure, do not add fuel.
• Before performing the following procedure, check that fuel level is between 1/4 and 4/4.
• Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
>> GO TO 8.
8.
PERFORM DTC CONFIRMATION PROCEDURE B
1.
Start engine and let it idle for 60 minutes.
2.
Move the vehicle to a cool place.
NOTE:
Cool the vehicle in an environment of ambient air temperature between
−
10
°
C (14
°
F) and 35
°
C (95
°
F).
3.
Turn ignition switch OFF and soak the vehicle for 12 hours.
CAUTION:
Never turn ignition switch ON during soaking.
NOTE:
The vehicle must be cooled with the food open.
4.
Start engine and let it idle for 5 minutes or more.
CAUTION:
Never turn ignition switch OFF during idling.
5.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Component Function Check
INFOID:0000000009651092
1.
CHECK FUEL TANK TEMPERATURE (FTT) SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect fuel level sensor unit and fuel pump harness connector.
3.
Remove fuel level sensor unit. Refer to
P0181 FTT SENSOR
EC-251
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
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M
A
EC
N
P
O
4.
Check resistance between fuel level sensor unit and fuel pump
terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Proceed to
.
2.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009651093
1.
INSPECTION START
Confirm the detected malfunction (A or B). Refer to
.
Which malfunction is detected?
A
>> GO TO 2.
B
>> GO TO 5.
2.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect fuel level sensor unit and fuel pump harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between fuel level sensor unit and fuel pump harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between fuel tank temperature sensor harness connector and ECM harness connec-
tor.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
4.
CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
Terminals
Condition
Resistance (k
Ω
)
4 and 5
Temperature [
°
C (
°
F)]
20 (68)
2.3 – 2.7
50 (122)
0.79 – 0.90
JMBIA0167ZZ
Fuel level sensor unit and fuel pump
Ground
Voltage
Connector
Terminal
B40
4
Ground
Approx. 5 V
Fuel level sensor unit and fuel
pump
ECM
Continuity
Connector
Terminal
Connector
Terminal
B40
4
E16
111
Existed
EC-252
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0181 FTT SENSOR
3.
Check the continuity between fuel level sensor unit and fuel pump harness connector and ECM harness
connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit, short to ground or short to power in harness or connector.
5.
CHECK FUEL TANK TEMPERATURE SENSOR
Check fuel tank temperature sensor. Refer to
EC-252, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
NO
>> Replace fuel level sensor unit and fuel pump. Refer to
Component Inspection
INFOID:0000000009651094
1.
CHECK FUEL TANK TEMPERATURE SENSOR
1.
Turn ignition switch OFF.
2.
Remove fuel level sensor unit. Refer to
3.
Check resistance between “fuel level sensor unit and fuel pump”
terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace fuel level sensor unit and fuel pump. Refer to
Fuel level sensor unit and fuel pump
ECM
Continuity
Connector
Terminal
Connector
Terminal
B40
5
E16
120
Existed
Terminals
Condition
Resistance
4 and 5
Temperature [
°
C (
°
F)]
20 (68)
2.3 - 2.7 k
Ω
50 (122)
0.79 - 0.90 k
Ω
JMBIA0167ZZ
P0182, P0183 FTT SENSOR
EC-253
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0182, P0183 FTT SENSOR
DTC Logic
INFOID:0000000009651095
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 5 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009651096
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E104, B4
• Harness for open or short between ECM and “fuel level sensor unit and fuel pump”
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0182
Fuel tank temperature
sensor circuit low input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Fuel tank temperature sensor
P0183
Fuel tank temperature
sensor circuit high input
An excessively high voltage from the sensor is
sent to ECM.
Fuel level sensor unit and fuel pump
Ground
Voltage
Connector
Terminal
B40
4
Ground
Approx. 5 V
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