2014 NISSAN TEANA engine

P0125 ECT SENSOREC-747
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace engine coolant temperature sensor.
2.CHECK THERMOSTAT OPERATION
When the engine is cold [lower than 70 °C (158 °F)] condition, grasp lower radiator hose and confirm that the
engine coolant does not flow.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Repair or replace thermostat. Refer to CO-49, "Removal and Installation"
.
Component InspectionINFOID:0000000009462617
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor. Refer to CO-51, "Removal and Installation"
.
4. Check resistance between engine coolant temperature sensor terminals as per the following.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine coolant temperature sensor. Refer to CO-51, "Removal and Installation"
.
ECT sensor
ConditionResistance
(kΩ)
+
−
Te r m i n a l
1 2 Temperature [ °C ( °F)] 20 (68) 2.37 - 2.63
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
JMBIA0080ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-748
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0127 IAT SENSOR
P0127 IAT SENSOR
DTC LogicINFOID:0000000009462618
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.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road
test is expected to be easier, it is unnecessary to lift the vehicle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Wait until engine coolant temperature is less than 96 °C (205 °F)
- Turn ignition switch ON.
- Select “DATA MONITOR” mode with CONSULT.
- Check the engine coolant temperature.
- If the engine coolant temperature is not less than 96 °C (205 °F), turn ignition switch OFF and cool down
engine.
NOTE:
Perform the following steps before engine coolant temperature is above 96 °C (205 °F).
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT.
4. Start engine.
5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds. CAUTION:
Always drive vehicle at a safe speed.
6. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES >> Proceed to EC-748, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462619
1.CHECK INTAKE AIR TEMPERATURE SENSOR
Check intake air temperature sensor. Refer to EC-749, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace mass air flow sensor (with intake air temperature sensor).
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0127 Intake air temperature
too high Rationally incorrect voltage from the sensor is
sent to ECM, compared with the voltage signal
from engine coolant temperature sensor. • Harness or connectors
(The sensor circuit is open or shorted)
• Intake air temperature sensor
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-750
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0128 THERMOSTAT FUNCTION
P0128 THERMOSTAT FUNCTION
DTC LogicINFOID:0000000009462621
DTC DETECTION LOGIC
NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303, P0304, P0305 or P0306, first perform
the trouble diagnosis for P0300, P0301, P0302, P0303, P 0304, P0305, P0306. Refer to EC-809, "DTC
Logic".
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough.
This is due to a leak in the seal or the thermostat being stuck open.
DTC CONFIRMATION PROCEDURE
NOTE:
Never refuel before and during the following procedure.
1.PRECONDITIONING-I
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.PRECONDITIONING-II
With CONSULT
1. Turn ignition switch ON.
2. Check the following conditions:
3. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
4. Check the following conditions:
Is the condition satisfied?
YES >> GO TO 3.
NO >> 1. Satisfy the condition.
2. GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT
1. Start engine.
2. Drive the vehicle until the following condition is satisfied.
CAUTION:
Always drive vehicle at safe speed.
- STEP 1
DTC No. Trouble diagnosis
(Trouble diagnosis content) DTC detecting condition Possible cause
P0128 THERMSTAT FNCTN
[Coolant thermostat (coolant
temperature below thermostat
regulating temperature)] The engine coolant temperature does not
reach to specified temperature even though
the engine has run long enough. •Thermostat
• Leakage from sealing portion of ther-
mostat
• Engine coolant temperature sensor
Ambient temperature −10 °C (14 °F) or more
A/C switch OFF
Blower fan switch OFF
COOLAN TEMP/S −10 °C – 46 °C (14 – 115 °F)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0128 THERMOSTAT FUNCTIONEC-751
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
Drive the vehicle under the conditions instructed bel
ow until the difference between “COOLAN TEMP/S” and
“FUEL T/TMP SE” becomes at least 24 °C (43 °F).
*: Example
- STEP 2
Drive the vehicle at 50 km/h (32 MPH) or more with the difference between “COOLAN TEMP/S” and “FUEL
T/TMP SE” maintained at 24 °C (43 °F) or more.
NOTE:
Keep the accelerator pedal as steady as possible during cruising.
- STEP 3
Drive the vehicle at 50 km/h (32 MPH) or more until “COOLAN TEMP/S” increases by 6 °C (11 °F).
NOTE:
Keep the accelerator pedal as steady as possible during cruising.
Is the condition satisfied?
YES >> GO TO 4.
NO >> GO TO 1.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
With CONSULT
1. Drive the vehicle until the following condition is satisfied.
CAUTION:
Always drive vehicle at safe speed.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-751, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462622
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check engine coolant temperature sensor. Refer to EC-751, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace engine coolant temperature sensor.
2.CHECK THERMOSTAT
Check thermostat. Refer to CO-49, "Removal and Installation"
.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace thermostat. Refer to CO-49, "Removal and Installation"
.
Component InspectionINFOID:0000000009462623
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
COOLAN TEMP/S 65 °C (149 °F) or less
FUEL T/TMP SE Less than the value calculated by sub- tracting 24°C (43 °F) from “COOLAN
TEMP/S”.*
COOLAN TEMP/S FUEL T/TMP SE
70°C (158 °F) 46 °C (115 °F) or less
65 °C (149 °F) 41 °C (106 °F) or less
60 °C (140 °F) 36 °C (97 °F) or less
COOLAN TEMP/S 65 °C (149 °F) or more
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-752
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0128 THERMOSTAT FUNCTION
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor. Refer to CO-51, "Removal and Installation"
.
4. Check resistance between engine coolant temperature sensor
terminals as per the following.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine coolant temperature sensor. Refer to CO-51, "Removal and Installation"
.
ECT sensor
ConditionResistance
(kΩ)
+
−
Te r m i n a l
1 2 Temperature [ °C ( °F)] 20 (68) 2.37 - 2.63
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
JMBIA0080ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0130, P0150 A/F SENSOR 1EC-753
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
P0130, P0150 A/F SENSOR 1
DTC LogicINFOID:0000000009462624
DTC DETECTION LOGIC
To judge malfunctions, the diagnosis c
hecks that the A/F signal computed by ECM from the A/F sensor 1 sig-
nal fluctuates according to fuel feedback control.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, 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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Start engine and warm it up to normal operating temperature.
2. Let engine idle for 2 minutes.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-755, "Diagnosis Procedure".
NO-1 >> With CONSULT: GO TO 3.
NO-2 >> With GST: GO TO 7.
3.CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B 2)” in “DATA MONITOR” mode with CONSULT.
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
Does the indication fluctuate around 2.2 V?
YES >> GO TO 4.
NO >> Proceed to EC-755, "Diagnosis Procedure"
.
4.PERFORM DTC CONFIRMATION PR OCEDURE FOR MALFUNCTION B-I
1. Select “A/F SEN1 (B1) P1276” (for DTC P0130) or “A/F SEN1 (B2) P1286” (for DTC P0150) of “A/F
SEN1” in “DTC WORK SUPPORT” mode with CONSULT.
2. Touch “START”.
3. When the following conditions are met, “TESTING” will be displayed on the CONSULT screen.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0130 Air fuel ratio (A/F) sensor 1
(bank 1) circuit A)
The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in a range other
than approx. 2.2 V. • Harness or connectors
(The A/F sensor 1 circuit is open
or shorted.)
• A/F sensor 1
B) The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 2.2 V.
P0150 Air fuel ratio (A/F) sensor 1
(bank 2) circuit A)
The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in a range other
than approx. 2.2 V. • Harness or connectors
(The A/F sensor 1 circuit is open
or shorted.)
• A/F sensor 1
B) The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 2.2 V.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-754
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0130, P0150 A/F SENSOR 1
If “TESTING” is not displayed after 20 seconds, retry from step 2.
CAUTION:
Always drive vehicle at a safe speed.
Is
“TESTING” displayed on CONSULT screen?
YES >> GO TO 5.
NO >> Check A/F sensor 1 function again. GO TO 3.
5.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II
Release accelerator pedal fully.
NOTE:
Never apply brake when releasing the accelerator pedal.
Which does
“TESTING” change to?
COMPLETED>>GO TO 6.
OUT OF CONDITION>>Retry DTC CONF IRMATION PROCEDURE. GO TO 4.
6.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III
Touch “SELF-DIAG RESULT”.
Which is displayed on CONSULT screen?
OK >> INSPECTION END
NG >> Proceed to EC-755, "Diagnosis Procedure"
.
7.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B
Perform component function check. Refer to EC-754, "Component Function Check"
.
NOTE:
Use component function check to check t he overall function of the A/F sensor 1 circuit. During this check, a
1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-755, "Diagnosis Procedure"
.
Component Function CheckINFOID:0000000009462625
1.PERFORM COMPONENT FUNCTION CHECK
With GST
1. Start engine and warm it up to normal operating temperature.
2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
3. Shift the selector lever to the D position, then re lease the accelerator pedal fully until the vehicle speed
decreases to 50 km/h (31 MPH).
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
Never apply brake when releasing the accelerator pedal.
4. Repeat steps 2 and 3 for 5 times.
5. Stop the vehicle and turn ignition switch OFF.
6. Wait at least 10 seconds and restart engine.
7. Repeat steps 2 and 3 for 5 times.
8. Stop the vehicle.
9. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-755, "Diagnosis Procedure".
NO >> INSPECTION END
ENG SPEED 1,000 - 3,200 rpm
VHCL SPEED SE More th an 64 km/h (40 mph)
B/FUEL SCHDL 1.0 - 10.0 msec
Selector lever D position
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0131, P0151 A/F SENSOR 1EC-757
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
P0131, P0151 A/F SENSOR 1
DTC LogicINFOID:0000000009462627
DTC DETECTION LOGIC
To judge the malfunction, the diagnosis checks that the
A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately low.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, 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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
>> GO TO 2.
2.CHECK A/F SENSOR 1 FUNCTION
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B 2)” in “DATA MONITOR” mode with CONSULT.
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
With GST
Follow the procedure “With CONSULT” above.
Is the indication constantly approx. 0 V?
YES >> Proceed to EC-758, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch OFF, wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
4. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.
CAUTION:
Always drive vehicle at a safe speed.
5. Maintain the following conditions for approximately 20 consecutive seconds.
NOTE:
• Keep the accelerator pedal as steady as possible during cruising.
• If this procedure is not completed within 1 minute after restarting engine at step 1, return to step
1.
6. Check 1st trip DTC.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0131 Air fuel ratio (A/F) sensor 1
(bank 1) circuit low voltage • The A/F signal computed by ECM from the A/
F sensor 1 signal is constantly approx. 0 V. • Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
• A/F sensor 1
P0151 Air fuel ratio (A/F) sensor 1
(bank 2) circuit low voltage
ENG SPEED 1,000 - 3,200 rpm
VHCL SPEED SE More than 40 km/h (25 mph)
B/FUEL SCHDL 1.5 - 9.0 msec
Selector lever Suitable position
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM