2014 NISSAN TEANA check engine

EC-834
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnosis Procedure
INFOID:0000000009462684
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between EVAP canister purge vo lume control solenoid valve harness connector and
ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform the trouble diagnosis for power supply circuit.
2.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VA LVE OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP canister pur ge volume control solenoid valve 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 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check that water is not inside connectors.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace EVAP control system pressure sensor. Refer to FL-18, "Removal and Installation"
.
4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Check EVAP control system pressure sensor. Refer to EC-849, "Component Inspection"
.
Is the inspection result normal?
YES-1 >> With CONSULT: GO TO 5.
YES-2 >> Without CONSULT: GO TO 6.
NO >> Replace EVAP control system pressure sensor. Refer to FL-18, "Removal and Installation"
.
5.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Start engine.
4. Perform “PURG VOL C/V” in “ACTIVE TEST” m ode with CONSULT. Check that engine speed varies
according to the valve opening.
Does engine speed vary according to the valve opening?
YES >> GO TO 7.
EVAP canister purge volume control solenoid valve Ground Voltage
Connector Terminal
F32 1 Ground Battery voltage
EVAP canister purge volume con- trol solenoid valve ECM
Continuity
Connector Terminal Connector Terminal
F32 2 F78 42 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-835
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
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NO >> GO TO 6.
6.CHECK EVAP CANISTER PURGE VO
LUME CONTROL SOLENOID VALVE
Check EVAP canister purge volume control solenoid valve. Refer to EC-835, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace EVAP canister purge volume control solenoid valve. Refer to EC-548, "ENGINE CON-
TROL SYSTEM : Component Parts Location".
7.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 8.
NO >> Clean the rubber tube using an air blower.
8.CHECK EVAP CANISTER VENT CONTROL VALVE
Check EVAP canister vent control valve. Refer to EC-841, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace EVAP canister vent control valve. Refer to FL-17, "Removal and Installation"
.
9.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
Remove EVAP canister with EVAP canister vent control valve and
EVAP control system pressure sensor attached. Refer to FL-14,
"Exploded View".
Does water drain from the EVAP canister?
YES >> GO TO 10.
NO >> Check intermittent incident. Refer to GI-43, "Intermittent
Incident".
10.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 >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> GO TO 11.
11 .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, "Exploded View"
.
Component InspectionINFOID:0000000009462685
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect EVAP purge hoses connected to EVAP c anister purge volume control solenoid valve.
4. Turn ignition switch ON.
JMBIA1134GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-836
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
5. Select “PURG VOL C/V” in
“ACTIVE TEST” mode with CONSULT.
6. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG VOL C/V” opening and check air passage continuity of EVAP
canister purge volume control solenoid valve under the following
conditions.
Without CONSULT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4. Check air passage continuity of EVAP canister purge volume
control solenoid valve under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace EVAP canister purge volume control solenoid valve. Refer to EC-548, "ENGINE CONTROL SYSTEM : Component Parts Location"
.
Condition
(PURG VOL C/V value) Air passage continuity
between (A) and (B)
100% Existed 0% Not existed
PBIB2058E
Condition Air passage continuity
between (A) and (B)
12 V direct current supply between
terminals 1 and 2 Existed
No supply Not existed
PBIB2059E
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-837
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
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P0444, P0445 EVAP CANISTER PU
RGE VOLUME CONTROL SOLENOID
VA LV E
DTC LogicINFOID:0000000009462686
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CONDITIONING
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, confi rm battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 13 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-837, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462687
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform the trouble diagnosis for power supply circuit.
2.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VA LVE OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0444 EVAP canister purge volume
control solenoid valve circuit
open An excessively low voltage signal is sent
to ECM through the valve • Harness or connectors
(The solenoid valve circuit is open or
shorted.)
• EVAP canister purge volume control so- lenoid valve
P0445 EVAP canister purge volume
control solenoid valve circuit
shorted An excessively high voltage signal is sent
to ECM through the valve • Harness or connectors
(The solenoid valve circuit is shorted.)
• EVAP canister purge volume control so- lenoid valve
EVAP canister purge volume control
solenoid valve Ground Voltage
Connector Terminal
F32 1 Ground Battery voltage
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-838
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0444, P0445 EVAP CANISTER P
URGE VOLUME CONTROL SOLENOID
VALVE
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP canister pur ge volume control solenoid valve harness connector and
ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES-1 >> With CONSULT: GO TO 3.
YES-2 >> Without CONSULT: GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform “PURG VOL C/V” in “ACTIVE TEST” m ode with CONSULT. Check that engine speed varies
according to the valve opening.
Does engine speed vary according to the valve opening?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> GO TO 4.
4.CHECK EVAP CANISTER PURGE VO LUME CONTROL SOLENOID VALVE
Check EVAP canister purge volume control solenoid valve. Refer to EC-838, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace EVAP canister purge volume control solenoid valve. Refer to EC-548, "ENGINE CON-
TROL SYSTEM : Component Parts Location".
Component InspectionINFOID:0000000009462688
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4. Turn ignition switch ON.
5. Select “PURG VOL C/V” in “ACTIVE TEST” mode with CONSULT.
6. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG
VOL C/V” opening and check air passage continuity of EVAP
canister purge volume control solenoid valve under the following
conditions.
Without CONSULT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
EVAP canister purge volume con-
trol solenoid valve ECM
Continuity
Connector Terminal Connector Terminal
F32 2 F78 42 Existed
Condition
(PURG VOL C/V value) Air passage continuity
between (A) and (B)
100% Existed 0% Not existed
PBIB2058E
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-839
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
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4. Check air passage continuity of EVAP canister purge volume
control solenoid valve under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace EVAP canister purge volume control solenoid
valve. Refer to EC-548, "ENGINE CONTROL SYST EM : Component Parts Location"
.
ConditionAir passage continuity
between (A) and (B)
12 V direct current supply between
terminals 1 and 2 Existed
No supply Not existed
PBIB2059E
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-840
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P0447 EVAP CANISTER VENT CONTROL VALVE
P0447 EVAP CANISTER VENT CONTROL VALVE
DTC LogicINFOID:0000000009462689
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:
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-840, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462690
1.INSPECTION START
Will CONSULT be used?
Will CONSULT be used?
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 ON.
2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT.
3. Touch “ON/OFF” on CONSULT screen.
4. Check for operating sound of the valve.
Is the inspection result normal?
YES >> GO TO 6.
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.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0447 EVAP canister vent con-
trol valve circuit open An improper voltage signal is sent to ECM
through EVAP canister vent control valve. • Harness or connectors
(The valve circuit is open or shorted.)
• EVAP canister vent control valve
• Hoses
(Hoses are connected incorrectly or
clogged.)
Clicking sound should be heard.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0448 EVAP CANISTER VENT CONTROL VALVEEC-843
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
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P0448 EVAP CANISTER VENT CONTROL VALVE
DTC LogicINFOID:0000000009462692
DTC DETECTION LOGIC
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.
>> 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 with CONSULT.
4. Start engine and let it idle for at least 1 minute.
5. Repeat next procedures 3 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.
Is 1st trip DTC detected?
YES >> Proceed to EC-843, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462693
1.CHECK RUBBER TUBE
1. Turn ignition switch OFF.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0448 EVAP canister vent con-
trol valve close 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