2014 NISSAN TEANA ignition

EC-350
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0447 EVAP CANISTER VENT CONTROL VALVE
P0447 EVAP CANISTER VENT CONTROL VALVE
DTC LogicINFOID:0000000009462278
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.
TESTING CONDITION:
Before performing the following procedure, confi rm battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 8 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-350, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462279
1.INSPECTION START
Do you have CONSULT?
Do you have CONSULT?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK EVAP CANISTER VE NT CONTROL VALVE CIRCUIT
With CONSULT
1. Turn ignition switch OFF and then turn ON.
2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
3. Touch “ON/OFF” on CONSULT screen.
4. Check for operating sound of the valve.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 3.
3.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve harness connector.
3. Turn ignition switch ON.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P0447 VENT CONTROL VALVE
(Evaporative emission system vent
control circuit open) An improper voltage signal is sent to
ECM through EVAP canister vent control
valve. • Harness or connectors
(EVAP canister vent control valve
circuit is open or shorted.)
• EVAP canister vent control valve
Clicking sound should be heard.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0447 EVAP CANISTER VENT CONTROL VALVEEC-351
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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4. Check the voltage between EVAP canister
vent control valve harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK EVAP CANISTER VENT CONT ROL VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between EVAP canister vent control valve harness connector and IPDM E/R harness
connector.
4. Also check harness for short to ground.
Is the inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
5.CHECK EVAP CANISTER VENT CONTRO L VALVE OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP canister vent control valve harness connector and ECM harness con-
nector.
*1: Except for California
*2: For California
4. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EV AP canister vent control valve.
2. Check the rubber tube for clogging.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Clean the rubber tube using an air blower.
7.CHECK EVAP CANISTER VENT CONTROL VALVE
+
−Vo l ta g e
EVAP canister vent control valve
Connector Terminal B39 1 Ground Battery voltage
+ −
Continuity
EVAP canister vent control
valve IPDM E/R
Connector Terminal Connector Terminal B39 1 F83 59 Existed
+ −
Continuity
EVAP canister vent control
valve ECM
Connector Terminal Connector Terminal
B39 2 E10
*1
E31*297 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-352
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0447 EVAP CANISTER VENT CONTROL VALVE
Check the EVAP canister vent control valve. Refer to
EC-352, "Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace EVAP canister vent control valve. Refer to FL-17, "Removal and Installation"
Component InspectionINFOID:0000000009462280
1.CHECK EVAP CANISTER VENT CONTROL VALVE-1
1. Turn ignition switch OFF.
2. Remove EVAP canister vent control valve from EVAP canister.
3. Check portion of EVAP canister vent control valve for being rusted.
Is it rusted?
YES >> Replace EVAP canister vent control valve. Refer to FL-
17, "Removal and Installation".
NO >> GO TO 2.
2.CHECK EVAP CANISTER VENT CONTROL VALVE-2
With CONSULT
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
4. Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace EVAP canister vent control valve. Refer to FL-17, "Removal and Installation"
.
3.CHECK EVAP CANISTER VENT CONTROL VALVE-3
With CONSULT
1. Clean the air passage [portion to ] of EVAP c anister vent control valve using an air blower.
2. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
JMBIA0168ZZ
Condition
(VENT CONT/V) Air passage continuity between and
ON Not existed
OFF Existed
Condition Air passage continuity between and
12 V direct current supply between
terminals 1 and 2 Not existed
OFF Existed
JMBIA0169ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-354
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
P0448 EVAP CANISTER VENT CONTROL VALVE
DTC LogicINFOID:0000000009462281
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
With CONSULT
1. Turn ignition switch ON and wait at least 5 seconds.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select “DATA MONITOR” mode of “ENGINE” using CONSULT.
4. Start engine and let it idle for at least 1 minute.
5. Repeat next procedures three times.
- Increase the engine speed up to 3,000 to 3,500 rpm and keep it for 2 minutes and 50 seconds to 3 min-
utes.
Never exceed 3 minutes.
- Fully released accelerator pedal and keep engine idle for about 5 seconds.
6. Repeat next procedure 20 times.
- Quickly increase the engine speed up to 4,000 to 4, 500 rpm or more and keep it for 25 to 30 seconds.
- Fully released accelerator pedal and keep engine idle for at least 35 seconds.
7. Check 1st trip DTC. With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES >> Proceed to EC-355, "Diagnosis Procedure".
NO >> INSPECTION END
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P0448 VENT CONTROL VALVE
(Evaporative emission system
vent control circuit shorted) EVAP canister vent control valve remains
closed under specified driving conditions. • EVAP canister vent control valve
• EVAP control system pressure sensor and the circuit
• Blocked rubber tube to EVAP canister vent control valve
• EVAP canister is saturated with water
PBIB0972E
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0448 EVAP CANISTER VENT CONTROL VALVEEC-355
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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Diagnosis ProcedureINFOID:0000000009462282
1.CHECK RUBBER TUBE
1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EV AP canister vent control valve.
3. Check the rubber tube for clogging.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Clean rubber tube using an air blower.
2.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the EVAP canister vent control valve. Refer to EC-356, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace EVAP canister vent control valve. Refer to FL-17, "Removal and Installation"
.
3.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent c ontrol valve and EVAP control system pressure sensor
attached.
2. Check if water will drain from the EVAP canister.
Does water drain from EVAP canister?
YES >> GO TO 4.
NO >> GO TO 6.
4.CHECK EVAP CANISTER
Weigh the EVAP canister with the EV AP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and vehi cle frame for clogging or poor connection
>> Repair hose or replace EVAP canister. Refer to FL-14, "Removal and Installation"
.
6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace EVAP control system pressure sensor. Refer to FL-18, "Removal and Installation"
.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Check the EVAP control system pressure sensor. Refer to EC-361, "Component Inspection"
.
PBIB1213E
Water should not exist.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-356
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
Is the inspection result normal?
YES >> Check intermittent incident. Refer to
GI-43, "Intermittent Incident".
NO >> Replace EVAP control system pressure sensor. Refer to FL-18, "Removal and Installation"
.
Component InspectionINFOID:0000000009462283
1.CHECK EVAP CANISTER VENT CONTROL VALVE-1
1. Turn ignition switch OFF.
2. Remove EVAP canister vent control valve from EVAP canister.
3. Check portion of EVAP canister vent control valve for being rusted.
Is it rusted?
YES >> Replace EVAP canister vent control valve. Refer to FL-
17, "Removal and Installation".
NO >> GO TO 2.
2.CHECK EVAP CANISTER VENT CONTROL VALVE-2
With CONSULT
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
4. Check air passage continuity and operation delay time. Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace EVAP canister vent control valve. Refer to FL-17, "Removal and Installation"
.
3.CHECK EVAP CANISTER VENT CONTROL VALVE-3
With CONSULT
1. Clean the air passage [portion to ] of EVAP c anister vent control valve using an air blower.
2. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
JMBIA0168ZZ
Condition
(VENT CONT/V) Air passage continuity between and
ON Not existed
OFF Existed
Condition Air passage continuity between and
12 V direct current supply between
terminals 1 and 2 Not existed
OFF Existed
JMBIA0169ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-358
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC LogicINFOID:0000000009462284
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE:
Never remove fuel filler cap duri ng 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.
With CONSULT>>GO TO 2.
Without CONSULT>>GO TO 5.
2.PERFORM DTC CONFIRMATION PROCEDURE-1
With CONSULT
1. Start engine and let it idle for least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-359, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Select “EVAP DIAG READY” in “DATA MONITOR” mode of “ENGINE”.
2. Let it idle until “OFF” of “E VAP DIAG READY” changes to “ON”.
NOTE:
It will take at most 2 hours until “OFF ” of “EVAP DIAG READY” changes to “ON”.
3. Turn ignition switch OFF and wait at least 90 minutes.
NOTE:
Never turn ignition swit ch ON during 90 minutes.
4. Turn ignition switch ON.
5. Select “EVAP LEAK DIAG” in “DATA MONITOR” mode of “ENGINE”.
6. Check that “EVAP LE AK DIAG” indication.
Which is displayed on CONSULT?
CMPLT >> GO TO 4.
YET >> 1. Perform DTC CONFIRMATION PROCEDURE again. 2. GO TO 1.
4.PERFORM DTC CONFIRMATION PROCEDURE-3
With CONSULT
Check 1st trip DTC.
Is 1st trip DTC detected?
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P0451 EVAP SYS PRES SEN
(Evaporative emission system
pressure sensor/switch range/
performance) ECM detects a sloshing signal from the
EVAP control system pressure sensor • Harness or connectors
(EVAP control system pressure sensor
circuit is shorted.)
• EVAP control system pressure sensor
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0451 EVAP CONTROL SYSTEM PRESSURE SENSOREC-359
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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YES >> Proceed to
EC-359, "Diagnosis Procedure".
NO >> INSPECTION END
5.PERFORM DTC CONFIRMATION PROCEDURE-4
With GST
1. Start engine and let it idle for least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-359, "Diagnosis Procedure".
NO >> GO TO 6.
6.PERFORM DTC CONFIRMATION PROCEDURE-5
With GST
1. Let it idle for at least 2 hours.
2. Turn ignition switch OFF and wait at least 90 minutes. NOTE:
Never turn ignition swit ch ON during 90 minutes.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-359, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462285
1.CHECK EVAP CONTROL SYS TEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Turn ignition switch OFF.
2. Disconnect EVAP control system pressure sensor harness connector.
3. Check sensor harness connector for water.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness connector.
2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK EVAP CONTROL SYS TEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control syst em pressure sensor harness connector and ECM har-
ness connector.
Water should not exist.
+
−Vo l ta g e
(Approx.)
EVAP control system pressure sen-
sor
Connector Terminal B41 3 Ground 5 V
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM