2014 NISSAN TEANA sensor

EC-230
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0101 MAF SENSOR
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace MAF sensor (with intake air temperature sensor). Refer to EM-29, "Exploded View"
.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Check the EVAP control system pressure sensor. Refer to EC-361, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace EVAP control system pressure sensor. Refer to FL-18, "Removal and Installation"
.
8.CHECK MAF SENSOR
Check the MAF sensor. Refer to EC-230, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace MAF sensor. Refer to EM-29, "Exploded View"
.
Component InspectionINFOID:0000000009462180
1.CHECK MASS AIR FLOW SENSOR-1
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Start engine and warm it up to normal operating temperature.
4. Connect CONSULT and select “DATA MONITOR” mode of “ENGINE”.
5. Select “MAS A/F SE-B1” and check indication.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FL OW THROUGH MASS AIR FLOW SENSOR
1. Turn ignition switch OFF.
2. Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
- Crushed air ducts
- Malfunctioning seal of air cleaner element
- Uneven dirt of air cleaner element
- Intake valve deposits
- Improper specification of intake air system parts
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK MASS AIR FLOW SENSOR-2
With CONSULT
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT and select “DATA MONITOR” mode of “ENGINE”.
4. Select “MAS A/F SE-B1” and check indication.
Monitor item Condition MAS A/F SE-B1
MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 1.3 V
Idle (Engine is warmed-up to normal operating temper-
ature.) 1.3- 1.6 V
2,500 rpm (Engine is warmed-up to normal operating
temperature.) 1.8 - 2.2 V
Idle to about 4,000 rpm 1.3 - 1.6 V to Approx. 2.5 V*
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0101 MAF SENSOREC-231
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-3
With CONSULT
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor har ness connector and reconnect it again.
3. Start engine and warm it up to normal operating temperature.
4. Connect CONSULT and select “DATA MONITOR” mode of “ENGINE”.
5. Select “MAS A/F SE-B1” and check indication.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Clean or replace mass air flow sensor. Refer to EM-29, "Exploded View"
.
Monitor item Condition MAS A/F SE-B1
MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 1.3 V
Idle (Engine is warmed-up to normal operating temper-
ature.) 1.3 - 1.6 V
2,500 rpm (Engine is warmed-up to normal operating
temperature.) 1.8 - 2.2 V
Idle to about 4,000 rpm 1.3 - 1.6 V to Approx. 2.5 V*
Monitor item Condition MAS A/F SE-B1
MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 1.3 V
Idle (Engine is warmed-up to normal operating temper-
ature.) 1.3 - 1.6 V
2,500 rpm (Engine is warmed-up to normal operating
temperature.) 1.8 - 2.2 V
Idle to about 4,000 rpm 1.3 - 1.6 V to Approx. 2.5 V*
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-232
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0102, P0103 MAF SENSOR
P0102, P0103 MAF SENSOR
DTC LogicINFOID:0000000009462181
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.
Which DTC is detected?
P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0102
1. Start engine and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Proceed to EC-232, "Diagnosis Procedure".
NO >> INSPECTION END
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-1
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Proceed to EC-232, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-2
1. Start engine and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Proceed to EC-232, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462182
1.INSPECTION START
Confirm the detected DTC.
Which DTC is detected?
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P0102 MAF SEN/CIRCUIT-B1
(Mass or volume air flow ″A ″
circuit low) An excessively low voltage from the mass air
flow sensor is sent to ECM. • Harness or connectors
(Mass air flow sensor circuit is open or
shorted.)
• Intake air leaks
• Mass air flow sensor
• Sensor power supply 2 circuit
P0103 MAF SEN/CIRCUIT-B1
(Mass or volume air flow ″A ″
circuit high) An excessively high voltage from the mass air
flow sensor is sent to ECM. • Harness or connectors
(Mass air flow sensor circuit is open or
shorted.)
• Mass air flow sensor
• Sensor power supply 2 circuit
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0102, P0103 MAF SENSOREC-233
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.CHECK INTAKE SYSTEM
Check the following for connection.
• Air duct
• Vacuum hoses
• Intake air passage between air duct to intake manifold
Is the inspection result normal?
YES >> GO TO 3.
NO >> Reconnect the parts. Refer to EM-29, "Exploded View"
.
3.CHECK MAF SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect mass air flow (MAF) sensor harness connector.
3. Turn ignition switch ON.
4. Check the voltage between MAF sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Perform EC-525, "Diagnosis Procedure"
.
Is the inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
5.CHECK MAF SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between MAF sensor harness connector and ECM harness connector.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT
1. Check the continuity between MAF sensor harness connector and ECM harness connector.
+
−Vo l ta g e
MAF sensor
Connector Terminal F31 6 Ground 5 V
+ −
Continuity
MAF sensor ECM
Connector Terminal Connector Terminal
F31 5 F14
*1
F91*234 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-234
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0102, P0103 MAF SENSOR
*1: Except for California
*2: For California
2. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK MAF SENSOR
Check the MAF sensor. Refer to EC-230, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace mass air flow sensor. Refer to EM-29, "Exploded View"
.
Component InspectionINFOID:0000000009462183
1.CHECK MASS AIR FLOW SENSOR-1
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Start engine and warm it up to normal operating temperature.
4. Connect CONSULT and select “DATA MONITOR” mode of “ENGINE”.
5. Select “MAS A/F SE-B1” and check indication.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FL OW THROUGH MASS AIR FLOW SENSOR
1. Turn ignition switch OFF.
2. Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
- Crushed air ducts
- Malfunctioning seal of air cleaner element
- Uneven dirt of air cleaner element
- Intake valve deposits
- Improper specification of intake air system parts
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK MASS AIR FLOW SENSOR-2
+ −
Continuity
MAF sensor ECM
Connector Terminal Connector Terminal
F31 4 F14
*1
F91*235 Existed
Monitor item Condition MAS A/F SE-B1
MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 1.3 V
Idle (Engine is warmed-up to normal operating temper-
ature.) 1.3- 1.6 V
2,500 rpm (Engine is warmed-up to normal operating
temperature.) 1.8 - 2.2 V
Idle to about 4,000 rpm 1.3 - 1.6 V to Approx. 2.5 V*
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0102, P0103 MAF SENSOREC-235
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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With CONSULT
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT and select “DATA MONITOR” mode of “ENGINE”.
4. Select “MAS A/F SE-B1” and check indication.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-3
With CONSULT
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor har ness connector and reconnect it again.
3. Start engine and warm it up to normal operating temperature.
4. Connect CONSULT and select “DATA MONITOR” mode of “ENGINE”.
5. Select “MAS A/F SE-B1” and check indication.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Clean or replace mass air flow sensor. Refer to EM-29, "Exploded View"
.
Monitor item Condition MAS A/F SE-B1
MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 1.3 V
Idle (Engine is warmed-up to normal operating temper-
ature.) 1.3 - 1.6 V
2,500 rpm (Engine is warmed-up to normal operating
temperature.) 1.8 - 2.2 V
Idle to about 4,000 rpm 1.3 - 1.6 V to Approx. 2.5 V*
Monitor item Condition MAS A/F SE-B1
MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 1.3 V
Idle (Engine is warmed-up to normal operating temper-
ature.) 1.3 - 1.6 V
2,500 rpm (Engine is warmed-up to normal operating
temperature.) 1.8 - 2.2 V
Idle to about 4,000 rpm 1.3 - 1.6 V to Approx. 2.5 V*
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-236
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P010A MANIFOLD ABSOL
UTE PRESSURE SENSOR
P010A MANIFOLD ABSOLUTE PRESSURE SENSOR
DTC LogicINFOID:0000000009462184
DTC DETECTION LOGIC
NOTE:
If DTC P010A is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-407, "DTC 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
1. Start engine and let it idle for 10 seconds.
2. Check DTC.
Is DTC detected?
YES >> Proceed to EC-236, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462185
1.CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR POWER SUPPLY CIRCUIT
1. Disconnect manifold absolute pressu re (MAP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between MAP sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK MAP SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between manifold MAP sensor harness connector and ECM harness connector.
DTC No.CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P010A ABSL PRES SEN/CIRC
(Mass or volume air flow ″B ″ circuit) • An excessively low voltage from the
sensor is sent to ECM.
• An excessively high voltage from the sensor is sent to ECM. • Harness or connectors
(Manifold absolute pressure sen-
sor circuit is shorted.)
• Manifold absolute pressure sensor
+
-Voltag e
(Approx.)
MAP sensor
Connector Terminal F89 1 Ground 5 V
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P010A MANIFOLD ABSOLUTE PRESSURE SENSOREC-237
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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4. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace error-detected parts.
3.CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INPUT SIGNAL CIRCUIT
1. Check the continuity between MAP sensor harness connector and ECM harness connector.
2. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK MAP SENSOR
Refer to EC-237, "Component Inspection (MAP Sensor)"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace MAP sensor.
Component Inspection (MAP Sensor)INFOID:0000000009462186
1.CHECK MAP SENSOR-1
1. Turn ignition switch OFF.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
4. Check the voltage between ECM harness connector terminals as follows.
NOTE:
• To avoid the influence of intake manifold vacuum, check the voltage 1 or more minutes past after engine is stopped.
• Because the sensor is absolute pressure sens or, output value may differ depending on atmospheric
pressure and altitude.
5. Measure the atmospheric pressure.
NOTE:
As the atmospheric pressure described on the synoptic chart is the value at sea level, compensate the
pressure with the following chart.
+-
Continuity
MAP sensor ECM
Connector Terminal Connector Terminal F89 3 F90 58 Existed
+- Continuity
MAP sensor ECM
Connector Terminal Connector Terminal F89 2 F90 59 Existed
ECM
Connector + –
F90 Te r m i n a l
59 58
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM