2008 NISSAN TEANA Service Manual

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Page 1609 of 5121

NISSAN TEANA 2008 Service Manual EC-148
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0075, P0081 IVT CONTROL SOLENOID VALVE
2. Provide 12 V DC between intake valve timing control solenoid
valve terminals 1 and 2, and then interrupt it. C

Page 1610 of 5121

NISSAN TEANA 2008 Service Manual P0102, P0103 MAF SENSOR
EC-149
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P0102, P0103 MAF SENSOR
DescriptionINFOID:0000000003856532
The mass air flow sensor (1) is placed

P0102, P0103 MAF SENSOR
EC-149
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P0102, P0103 MAF SENSOR
DescriptionINFOID:0000000003856532
The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The greater air flow, the
greater the heat loss.
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.
DTC LogicINFOID:0000000003856533
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
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 >> Go to EC-150, "Diagnosis Procedure".
NO >> INSPECTION END
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-I
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-150, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-II
1. Start engine and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-150, "Diagnosis Procedure".
PBIA9559J
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0102Mass air flow sensor
circuit low inputAn excessively low voltage from the sensor is sent
to ECM. Harness or connectors
(The sensor circuit is open or shorted.)
Intake air leaks
Mass air flow sensor
P0103Mass air flow sensor
circuit high inputAn excessively high voltage from the sensor is
sent to ECM. Harness or connectors
(The sensor circuit is open or shorted.)
Mass air flow sensor

Page 1611 of 5121

NISSAN TEANA 2008 Service Manual EC-150
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0102, P0103 MAF SENSOR
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856534
1.INSPECTION START
Confirm the detected DTC.
Which DTC is detecte

Page 1612 of 5121

NISSAN TEANA 2008 Service Manual P0102, P0103 MAF SENSOR
EC-151
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Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair open circuit, short to ground or sh

Page 1613 of 5121

NISSAN TEANA 2008 Service Manual EC-152
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0102, P0103 MAF SENSOR
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >

EC-152
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0102, P0103 MAF SENSOR
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR
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
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-II
With CONSULT-III
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT-III and select “DATA MONITOR” mode.
4. Select “MAS A/F SE-B1” and check indication under the following conditions.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Without CONSULT-III
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Check the voltage between ECM harness connector terminals under the following conditions.
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal?
ECM
Condition Voltage (V)
Connector+–
Terminal Terminal
F858
(MAF sen-
sor signal)56
(Sensor
ground)Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to about 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
Monitor item Condition MAS A/F SE-B1 (V)
MAS A/F SE-B1Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to about 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
ECM
Condition Voltage (V)
Connector+–
Terminal Terminal
F858
(MAF sen-
sor signal)56
(Sensor
ground)Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to about 4,000 rpm 0.9 - 1.2 to Approx. 2.4*

Page 1614 of 5121

NISSAN TEANA 2008 Service Manual P0102, P0103 MAF SENSOR
EC-153
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YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-III
With CONSULT-III
1. Turn ig

Page 1615 of 5121

NISSAN TEANA 2008 Service Manual EC-154
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0112, P0113 IAT SENSOR
P0112, P0113 IAT SENSOR
DescriptionINFOID:0000000003856536
The intake air temperature sensor is built-into the mass air flow sen-

Page 1616 of 5121

NISSAN TEANA 2008 Service Manual P0112, P0113 IAT SENSOR
EC-155
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Diagnosis ProcedureINFOID:0000000003856538
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.

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