2010 NISSAN LATIO Service Repair Manual

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Page 1929 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-664
< SERVICE INFORMATION >[MR18DE]
DTC P0101 MAF SENSOR
DTC P0101 MAF SENSOR
Component DescriptionINFOID:0000000005532479
The mass air flow sensor (1) is placed in the stream of intake air. It
mea

EC-664
< SERVICE INFORMATION >[MR18DE]
DTC P0101 MAF SENSOR
DTC P0101 MAF SENSOR
Component DescriptionINFOID:0000000005532479
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 more air, 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.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005532480
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005532481
DTC Confirmation ProcedureINFOID:0000000005532482
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
PBIA9559J
Monitor item Condition Specification
MAS A/F SE-B1 • See EC-624
.
CAL/LD VALUE • Engine: After warming up
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• Air conditioner switch: OFF
•No load Idle
10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW • Engine: After warming up
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• Air conditioner switch: OFF
•No load Idle
1.0 - 4.0 g·m/s
2,500 rpm 4.0 - 10.0 g·m/s
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0101
0101 Mass air flow sensor cir-
cuit range/performance A)
A high voltage from the sensor is sent to ECM
under light load driving condition. • Harness or connectors
(Mass air flow sensor circuit is
open or shorted.)
• Mass air flow sensor
• EVAP control system pressure sensor
• Intake air temperature sensor
B) A low voltage from the sensor is sent to ECM un-
der heavy load driving condition. • Harness or connectors
(Mass air flow sensor circuit is
open or shorted.)
• Intake air leaks
• Mass air flow sensor
• EVAP control system pressure sensor
• Intake air temperature sensor
Revision: January 20102010 Versa

Page 1930 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0101 MAF SENSOREC-665
< SERVICE INFORMATION > [MR18DE]
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EC
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PROCEDURE FOR MALFUNCTION A
NOTE:
If engine will not start or stops soon, wait at leas
t 10 seconds with eng

Page 1931 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-666
< SERVICE INFORMATION >[MR18DE]
DTC P0101 MAF SENSOR
1. Start engine and warm it up to normal operating temperature.
2. Select Service $01 with GST.
3. Check the mass air flow sensor signal wit

Page 1932 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0101 MAF SENSOREC-667
< SERVICE INFORMATION > [MR18DE]
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Wiring DiagramINFOID:0000000005532484
Specification data are reference values and are measured between each

Page 1933 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-668
< SERVICE INFORMATION >[MR18DE]
DTC P0101 MAF SENSOR
Diagnosis Procedure
INFOID:0000000005532485
1.INSPECTION START
Which malfunction (A or B) is duplicated?
A or B
A>>GO TO 3.
B>>GO TO 2.
2.CH

Page 1934 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0101 MAF SENSOREC-669
< SERVICE INFORMATION > [MR18DE]
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OOK or NG
OK >> GO TO 4.
NG >> Repair or replace ground connections.
4.CHECK MAF SENSOR PO
WER SUPPLY CIRCUIT

Page 1935 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-670
< SERVICE INFORMATION >[MR18DE]
DTC P0101 MAF SENSOR
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short

Page 1936 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0101 MAF SENSOREC-671
< SERVICE INFORMATION > [MR18DE]
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b. If NG, repair or replace malfunctioning part and perform step 2 to 4 again.
If OK, go to next step.
6. Tu

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