2010 NISSAN LATIO Service Repair Manual

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Page 1937 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-672
< SERVICE INFORMATION >[MR18DE]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
Component DescriptionINFOID:0000000005532488
The mass air flow sensor (1) is placed in the stream of inta

EC-672
< SERVICE INFORMATION >[MR18DE]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
Component DescriptionINFOID:0000000005532488
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:0000000005532489
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005532490
These self-diagnoses have the one trip detection logic.
FA I L - S A F E M O D E
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation ProcedureINFOID:0000000005532491
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 condition
Possible cause
P0102
0102 Mass air flow sensor
circuit low input An excessively low voltage from the sensor is sent
to ECM. • Harness or connectors
(Mass air flow sensor circuit is open or short-
ed.)
• Intake air leaks
• Mass air flow sensor
P0103
0103 Mass air flow sensor
circuit high input An excessively high voltage from the sensor is
sent to ECM. • Harness or connectors
(Mass air flow sensor circuit is open or short-
ed.)
• Mass air flow sensor
Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
Revision: January 20102010 Versa

Page 1938 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0102, P0103 MAF SENSOREC-673
< SERVICE INFORMATION > [MR18DE]
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PROCEDURE FOR DTC P0102
1. Start engine and wait at least 5 seconds.
2. Check DTC.
3. If DTC is detec

Page 1939 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-674
< SERVICE INFORMATION >[MR18DE]
DTC P0102, P0103 MAF SENSOR
Wiring Diagram
INFOID:0000000005532492
Specification data are reference values and are measured between each terminal and ground.
CAU

Page 1940 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0102, P0103 MAF SENSOREC-675
< SERVICE INFORMATION > [MR18DE]
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Diagnosis ProcedureINFOID:0000000005532493
1.INSPECTION START
Which malfunction (P0102 or P0103) is d

Page 1941 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-676
< SERVICE INFORMATION >[MR18DE]
DTC P0102, P0103 MAF SENSOR
OK or NG
OK >> GO TO 4.
NG >> Repair or replace ground connections.
4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT
1. Disconnect mass air fl

Page 1942 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0102, P0103 MAF SENSOREC-677
< SERVICE INFORMATION > [MR18DE]
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2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair op

Page 1943 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-678
< SERVICE INFORMATION >[MR18DE]
DTC P0102, P0103 MAF SENSOR
3. Check voltage between ECM terminal 45 (Mass air flow sensor
signal) and ground.
*: Check for linear voltage rise in response to en

Page 1944 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P0112, P0113 IAT SENSOREC-679
< SERVICE INFORMATION > [MR18DE]
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DTC P0112, P0113 IAT SENSOR
Component DescriptionINFOID:0000000005532496
The intake air temperature s

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