ECO mode NISSAN TEANA 2014 Service Manual

EC-386
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P050A, P050B, P050E COLD START CONTROL
P050A, P050B, P050E COLD START CONTROL
DescriptionINFOID:0000000009462312
ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.
This control promotes the activation of three way ca talyst by heating the catalyst and reduces emissions.
DTC LogicINFOID:0000000009462313
DTC DETECTION LOGIC
NOTE:
If DTC P050A, P050B or P050E is displayed with ot her DTC, first perform the trouble diagnosis for
other DTC.
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.
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-1
With CONSULT
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT.
4. Check the indication of “COOLAN TEMP/S”.
With GST
Follow the procedure “With CONSULT” above.
Is the value of
“COOLAN TEMP/S” between 15°C (59°F) and 36°C (97°F)?
YES >> GO TO 3.
NO-1 [If it is below 15 °C (59 °F)]>>Warm up the engine until the value of “COOLAN TEMP/S” reaches 15 °C
(59 °F) or more. Retry from step 1.
NO-2 [If it is above 36 °C (97 °F)]>>Cool engine down to less than 36 °C (97 °F). Retry from step 1.
3.PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Set the select lever in N range.
2. Start the engine and warm up in idle with the value of “COOLAN TEMP/S” between 15 °C (59 °F) and 40 °C
(104 °F) for more than 15 seconds.
3. Check 1st trip DTC.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P050A COLD START CONTROL
(Cold start idle air control system
performance) ECM does not control engine idle speed properly
when engine is started with pre-warming up con-
dition.
• Lack of intake air volume
• Fuel injection system
•ECM
P050B
COLD START CONTROL
(Cold start ignition timing perfor-
mance) ECM does not control ignition timing properly
when engine is started with pre-warming up con-
dition.
P050E COLD START CONTROL
(Cold start engine exhaust tem-
perature too low) The temperature of the catalyst inlet does not
rise to the proper temperature when the engine
is started with pre-warming up condition.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-410
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0850 PNP SWITCH
P0850 PNP SWITCH
DescriptionINFOID:0000000009462338
Transmission range switch is turn ON when the selector lever is P or N.
ECM detects the position because the c ontinuity of the line (the ON) exists.
DTC LogicINFOID:0000000009462339
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Do you have CONSULT?
Do you have CONSULT?
YES >> GO TO 2.
NO >> GO TO 5.
2.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 3.
3.CHECK PNP SIGNAL FUNCTION
With CONSULT
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode of “ENGINE” using CONSULT. Then check the “P/N
POSI SW” signal as per the following conditions.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Proceed to EC-411, "Diagnosis Procedure"
.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 60 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P0850 P-N POS SW/CIRCUIT
(Park/neutral switch input
circuit) The signal of transmission range switch is
not changed in the process of engine start-
ing and driving. • Harness or connectors
(The transmission range switch circuit is
open or shorted.)
• Transmission range switch
Selector lever position Known-good signal
N or P position ON
Except above position OFF
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P117A AIR FUEL RATIOEC-417
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
P117A AIR FUEL RATIO
DTC LogicINFOID:0000000009462347
DTC DETECTION LOGIC
NOTE:
If DTC P117A is displayed with other DTC, first perf orm the trouble diagnosis for the other DTC. Refer
to EC-105, "DTC Index"
.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING-1
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.
NOTE:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
>> GO TO 2.
2.PRECONDITIONING-2
1. Turn ignition switch ON.
2. Clear the mixture ratio self-learning value. Refer to EC-181, "Work Procedure"
.
Will CONSULT be used?
YES >> GO TO 3.
NO >> GO TO 6.
3.PERFORM DTC CONFIRMATION PROCEDURE-1
1. Turn ignition switch ON.
2. Select “COOLAN TEMP/S” in “DATA MONI TOR” mode of “ENGINE” using CONSULT.
3. Start engine.
4. Make sure that “COOLAN TEMP/S” indicates more than 80 °C (176 °F).
>> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Select “SYSTEM 1 DIAGNOSIS B B1” and “SYSTEM 1 DIAGNOSIS A B1” in “DATA MONITOR” mode of
“ENGINE” using CONSULT.
2. Drive vehicle under the following conditions for at least 5 consecutive seconds.
CAUTION:
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P117A AIR FUEL RATIO B1
(AIR FUEL RATIO B1) ECM detects a lean/rich air fuel ratio state in any
cylinder for a specified length of time. • Fuel injector
• Exhaust gas leaks
• Incorrect fuel pressure
• Mass air flow sensor
• Intake air leaks
• Lack of fuel
• Incorrect PCV hose connection
• Improper spark plug
• Insufficient compression
• The fuel injector circuit is open or shorted
• ignition coil
• The ignition signal circuit is open or shorted
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P1554 BATTERY CURRENT SENSOREC-437
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
P1554 BATTERY CURRENT SENSOR
DTC LogicINFOID:0000000009462368
DTC DETECTION LOGIC
NOTE:
If DTC P1554 is displayed with DTC P0643, first pe rform the trouble diagnosis for DTC P0643. Refer to
EC-407, "DTC Logic"
.
DTC CONFIRMATION PROCEDURE
1.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-437, "Component Function Check"
.
NOTE:
Use component function check to check the overall functi on of the battery current 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-438, "Diagnosis Procedure"
.
Component Function CheckINFOID:0000000009462369
1.PRECONDITIONING
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 12.8 V at idle.
• Before performing the following procedure, confi rm that all load switches and A/C switch are turned
OFF.
>> GO TO 2.
2.PERFORM COMPONENT FUNCTION CHECK
With CONSULT
1. Start engine and let it idle.
2. Select “BAT CUR SEN” in “DATA MONI TOR” mode of “ENGINE” using CONSULT.
3. Check “BAT CUR SEN” indication for 10 seconds. “BAT CUR SEN” should be above 2,300 mV at least once.
Without CONSULT
1. Start engine and let it idle.
2. Check the voltage between ECM harness connector and ground.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1554 BAT CURRENT SENSOR
(BAT CURRENT SENSOR) The output voltage of the battery current
sensor is lower than the specified value
while the battery voltage is high enough. • Harness or connectors
(Battery current sens or circuit is open
or shorted.)
• Battery current sensor
• Camshaft position sensor
• Camshaft (Intake)
•Starter motor
• Starting system circuit
• Dead (Weak) battery
ECM
Vo l ta g e
Connector +-
Te r m i n a l
F13
*1
F90*263 62 Above 2.3 V at least once
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-442
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1564 ASCD STEERING SWITCH
P1564 ASCD STEERING SWITCH
DTC LogicINFOID:0000000009462375
DTC DETECTION LOGIC
NOTE:
If DTC P1564 is displayed with DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B, perform
the trouble diagnosis for DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B. Refer to EC-105,
"DTC Index".
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
1. Turn ignition switch ON.
2. Wait at least 10 seconds.
3. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
4. Press CANCEL switch for at least 10 seconds , then release it and wait at least 10 seconds.
5. Press ACCEL/RES switch for at least 10 seconds , then release it and wait at least 10 seconds.
6. Press COAST/SET switch for at least 10 seconds , then release it and wait at least 10 seconds.
7. Check DTC.
Is DTC detected?
YES >> Proceed to EC-442, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462376
1.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT
1. Turn ignition switch ON.
2. Select “CANCEL SW”, “RESUME/ACC SW” and “S ET SW” in “DATA MONITOR” mode of “ENGINE”
using CONSULT.
3. Check each item indication as per the following conditions.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1564 ASCD SW
(ASCD switch) • An excessively high voltage signal from the
ASCD steering switch is sent to ECM.
• ECM detects that input signal from the
ASCD steering switch is out of the specified
range.
• ECM detects that the ASCD steering switch
is stuck ON. • Harness or connectors
(ASCD steering switch circuit is open
or shorted.)
• ASCD steering switch
•ECM
Monitor item Condition Indication
MAIN SW MAIN switch Pressed ON
Released OFF
CANCEL SW CANCEL switch Pressed ON
Released OFF
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-446
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1572 ASCD BRAKE SWITCH
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Drive the vehicle for at least 5 consecut ive seconds as per the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheel s 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.
2. Check DTC.
Is DTC detected?
YES >> Proceed to EC-452, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462379
1.CHECK OVERALL FUNCTION-1
With CONSULT
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONI TOR” mode of “ENGINE” using CONSULT.
3. Check “BRAKE SW1” indication as per the following conditions.
Without CONSULT
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals as per the following.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK OVERALL FUNCTION-2
With CONSULT
Select “BRAKE SW2” and check indication as per the following conditions.
Vehicle speed More than 30 km/h (19 mph)
Selector lever Suitable position
Driving location Depress the brake pedal for more
than five seconds so as not to come
off from the above-mentioned vehi-
cle speed.
Monitor item Condition Indication
BRAKE SW1 Brake pedal Slightly depressed OFF
Fully released ON
ECM ConditionVo l ta g e
(Approx.)
Connector +–
Te r m i n a l
E10
*1
E31*2116 128 Brake pedal Slightly depressed 0 V
Fully released Battery voltage
Monitor item Condition Indication
BRAKE SW2 Brake pedal Slightly depressed ON
Fully released OFF
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-462
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P2004 INTAKE MANIFOLD
RUNNER CONTROL VALVE
P2004 INTAKE MANIFOLD RUNNER CONTROL VALVE
DTC LogicINFOID:0000000009462396
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
• Before performing the following procedure, confirm th at battery voltage is more than 11 V at idle.
• Always perform the test at a temperature above −12 °C (10 °F)
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT.
3. Make sure that “COOLAN TEMP/S” indicates between −12 °C (10 °F) to 59 °C (138 °F).
If not, cool engine down or warm engine up until “COOLAN TEMP/S” indicates between −12 °C (10 °F) to
59 °C (138 °F). Then go to the following steps.
4. Fully release accelerator pedal and wait at least 10 seconds.
5. Depress accelerator pedal and wait at least 10 seconds.
6. Check 1st trip DTC.
With GST
Following the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES >> Proceed to EC-462, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462397
1.CHECK INTAKE MANIFOLD RUNNER CO NTROL VALVE MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector.
*1: Except for California
*2: For California
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P2004 TUMBLE CONT/V
(Intake manifold runner control
stuck open bank 1) The target angle of intake manifold runner
control valve controlled by ECM and the in-
put signal from intake manifold runner con-
trol valve position sensor is not in the normal
range. • Harness or connectors
(Intake manifold runner control valve
motor circuit is open or shorted.)
• Intake manifold runner control valve motor
• Intake manifold runner control valve is
stuck
ECM
Vo l ta g e
+-
Connector Terminal Connector Terminal
F13
*1
F90*250 E10*1
E31*2128 Battery voltage
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-480
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
DTC LogicINFOID:0000000009462411
DTC 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 FOR MALFUNCTION A AND B
1. Turn ignition switch ON and wait at least 1 second.
2. Set selector lever to D position and wait at least 3 seconds.
3. Set selector lever to P position.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and wait at least 1 second.
6. Set selector lever to D position and wait at least 3 seconds.
7. Set selector lever to P position.
8. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
9. Check DTC.
Is DTC detected?
YES >> Proceed to EC-480, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Set selector lever to D position and wait at least 3 seconds.
3. Set selector lever to P position.
4. Start engine and let it idle for 3 seconds.
5. Check DTC.
Is DTC detected?
YES >> Proceed to EC-480, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462412
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct. Refer to EM-29, "Exploded View"
.
2. Check if foreign matter is caught between the throttle valve and the housing.
Is the inspection result normal?
YES >> Replace electric throttle control actuator. Refer to EM-30, "Removal and Installation".
DTC No.CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P2119 ETC ACTR-B1
(Throttle actuator control throt-
tle body range/performance) A
Electric throttle control actuator does not function
properly due to the return spring malfunction.
Electric throttle control actuator
B Throttle valve opening angle in fail-safe mode is
not in specified range.
C ECM detect the throttle valve is stuck open.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

IGNITION SIGNALEC-511
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
IGNITION SIGNAL
Component Function CheckINFOID:0000000009462445
1.INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO >> Proceed to EC-511, "Diagnosis Procedure"
.
2.CHECK IGNITION SIGNAL FUNCTION
With CONSULT
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
2. Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-511, "Diagnosis Procedure"
.
3.CHECK IGNITION SIGNAL FUNCTION
Without CONSULT
1. Let engine idle.
2. Read the voltage signal between ECM harness connector terminals with an oscilloscope.
*1: Except for California
*2: For California
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-511, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009462446
1.CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
2. Check the voltage between ECM harness connector terminals.
ECM
Voltage signal
+–
Connector Terminal Connector Terminal
F13
*1
F90*2
86 E10
*1
E31*2128
87
90
91
JMBIA0035GB
ECM Vo l ta g e
Connector +–
Te r m i n a l
E10
*1
E31*2121 128 Battery voltage
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-520
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace fuel filler tube. Refer to FL-10, "Exploded View"
.
15.CHECK ONE-WAY FUEL VALVE-1
Check one-way valve for clogging.
Is the inspection result normal?
YES >> GO TO 16.
NO >> Repair or replace one-way fuel valve with fuel tank. Refer to FL-10, "Removal and Installation"
.
16.CHECK ONE-WAY FUEL VALVE-2
1. Check that fuel is drained from the tank.
2. Remove fuel filler tube and hose. Refer to FL-10, "Exploded View"
.
3. Check one-way fuel valve for operation as per the following.
When a stick is inserted, the valve should open, when removing
stick it should close.
Do not drop any material into the tank.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace fuel filler tube or replace one-way fuel valve
with fuel tank. Refer to FL-10, "Removal and Installa-
tion".
Component InspectionINFOID:0000000009462455
1.INSPECTION START
Will CONSULT be used?
Will CONSULT be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK REFUELING EVAP VAPOR CUT VALVE
With CONSULT
1. Turn ignition switch OFF.
2. Remove fuel tank. Refer to FL-10, "Removal and Installation"
.
3. Drain fuel from the tank as per the following:
- Remove fuel feed hose located on the fuel gauge retainer.
- Connect a spare fuel hose, one side to fuel gauge re tainer where the hose was removed and the other
side to a fuel container.
- Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT.
4. Check refueling EVAP vapor cut valve for being stuck to close as per the following. Blow air into the refueling EVAP vapor cut valv e (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
5. Check refueling EVAP vapor cut valve for being stuck to open as per the following.
- Connect vacuum pump to hose end.
- Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ri ng with new one.
- Turn fuel tank upside down.
- Apply vacuum pressure to hose end [ −13.3 kPa ( −0.136 kg/cm
3, −1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
SEF665U
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM