2016 NISSAN NOTE Service Repair Manual

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Page 1377 of 3641

NISSAN NOTE 2016 Service Repair Manual EC-250
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0171 FUEL INJECTION SYSTEM FUNCTION
6. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or sh

Page 1378 of 3641

NISSAN NOTE 2016 Service Repair Manual P0171 FUEL INJECTION SYSTEM FUNCTIONEC-251
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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Without CONSULT
1. Let engine idle.
2. Listen to each fuel injector operating sound.
Is th

Page 1379 of 3641

NISSAN NOTE 2016 Service Repair Manual EC-252
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0172 FUEL INJECTION SYSTEM FUNCTION
P0172 FUEL INJECTIO
N SYSTEM FUNCTION
DTC LogicINFOID:0000000012431457
DTC DETECTION LOGIC
With the Air/Fuel Mixture Ratio

EC-252
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0172 FUEL INJECTION SYSTEM FUNCTION
P0172 FUEL INJECTIO
N SYSTEM FUNCTION
DTC LogicINFOID:0000000012431457
DTC DETECTION LOGIC
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio f eedback signal from the A/F sensor 1. The ECM calcu-
lates the necessary compensation to correct the of fset between the actual and the theoretical ratios.
In case the amount of the compensation value is extrem ely large (The actual mixture ratio is too rich.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
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.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-132, "
Description".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.
NO >> GO TO 4.
3.RESTART ENGINE
If it is difficult to start engine, the f uel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system may not start the engine.
Do not depress accelerator pedal too much.
Does engine start?
YES >> Go to EC-253, "Diagnosis Procedure".
NO >> Remove spark plugs and check for fouling, etc.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Start engine and let it idle for at least 5 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-253, "Diagnosis Procedure".
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
Sensor Input signal to ECM ECM functionActuator
A/F sensor 1 Density of oxygen in exhaust gas
(Mixture ratio feedback signal) Fuel injection control Fuel injector
DTC No. Trouble diagnosis content
DTC detecting condition Possible cause
P0172 Fuel injection system too rich • Fuel injection system does not operate properly.
• The amount of mixture ratio compensation is too
large. (The mixture ratio is too rich.) • A/F sensor 1
• Fuel injector
• Exhaust gas leaks
• Incorrect fuel pressure
• Mass air flow sensor
Revision: August 2015
2016 Versa Note

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Page 1380 of 3641

NISSAN NOTE 2016 Service Repair Manual P0172 FUEL INJECTION SYSTEM FUNCTIONEC-253
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine.
3. Maintain the

Page 1381 of 3641

NISSAN NOTE 2016 Service Repair Manual EC-254
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0172 FUEL INJECTION SYSTEM FUNCTION
6. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or sh

Page 1382 of 3641

NISSAN NOTE 2016 Service Repair Manual P0172 FUEL INJECTION SYSTEM FUNCTIONEC-255
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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2. Listen to each fuel injector operating sound.
Is the inspection result normal?
YES >> G

Page 1383 of 3641

NISSAN NOTE 2016 Service Repair Manual E C -256
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0181 FTT SENSOR
P0181 FTT SENSOR
DTC LogicINFOID:0000000012431459
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Is it necessary to erase

E C -256
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0181 FTT SENSOR
P0181 FTT SENSOR
DTC LogicINFOID:0000000012431459
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Is it necessary to erase permanent DTC?
YES >> GO TO 7.
NO >> GO TO 2.
2.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.
>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A-I
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-258, "Diagnosis Procedure".
NO >> GO TO 4.
4.CHECK ENGINE COOLANT TEMPERATURE
With CONSULT
1. Select “COOLAN TEMP/S” in “DATA MONITOR” of “ENGINE” using CONSULT.
2. Check “COOLAN TEMP/S” value.
With GST
Follow the procedure “With CONSULT” above.
“
COOLAN TEMP/S” less than 60°C (140°F)?
YES >> INSPECTION END
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A-II
With CONSULT
1. Cool engine down until “COOLAN TEMP/S” is less than 60° C (140°F).
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition
Possible cause
P0181 FTT SENSOR
[Fuel tank temperature (FTT)
sensor circuit range/perfor-
mance] A)
Rationally incorrect voltage from the
sensor is sent to ECM, compared with
the voltage signals from ECT sensor
and intake air temperature sensor. • Harness or connectors
(FTT sensor circuit is open or shorted)
• FTT sensor
• Combination meter
B) The comparison result of signals trans-
mitted to ECM from each temperature
sensor (IAT sensor, ECT sensor, EOT
sensor, and FTT sensor) shows that
the voltage signal of the FTT sensor is
higher/lower than that of other temper-
ature sensors when the engine is start-
ed with its cold state. • Harness or connectors
(High or low resistance in the FTT
sensor circuit)
• FTT sensor
Revision: August 2015 2016 Versa Note

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Page 1384 of 3641

NISSAN NOTE 2016 Service Repair Manual P0181 FTT SENSOREC-257
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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2. Wait at least 10 seconds.
3. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT” above.
Is

P0181 FTT SENSOREC-257
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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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 EC-258, "Diagnosis Procedure".
NO >> GO TO 6.
6.PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B)
Perform component function check. Refer to EC-257, "
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 EC-258, "
Diagnosis Procedure".
7.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-
dure before conducti ng 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 sw itch ON during soaking.
NOTE:
The vehicle must be cooled with the hood open.
4. Start engine and let it idle for 5 minutes or more.
CAUTION:
Never turn ignition swit ch OFF during idling.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-258, "Diagnosis Procedure".
NO >> INSPECTION END
Component Function CheckINFOID:0000000012431460
1.CHECK FUEL TANK TEM PERATURE (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 FL-6, "
Removal and Installation".
Revision: August 2015 2016 Versa Note

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