2009 NISSAN LATIO Service Repair Manual

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Page 2529 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0101 MAF SENSOR
EC-1173
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
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M A EC
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Wiring Diagram
INFOID:0000000004500003
Specification data are reference values and are measured between

Page 2530 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1174< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0101 MAF SENSOR
Diagnosis Procedure INFOID:00000000045000041.
INSPECTION START
Which malfunction (A or B) is duplicated?
A or B A >> GO TO 3.
B >> GO

Page 2531 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0101 MAF SENSOR
EC-1175
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
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M A EC
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OK or NG OK >> GO TO 4.
NG >> Repair or replace ground connections. 4.
CHECK MAF SENSOR PO WER SUPPLY CI

Page 2532 of 4331

NISSAN LATIO 2009 Service Repair Manual OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short or short to power in harness or connectors. Component Inspection " .
OK or NG OK >> GO TO 9.
NG >> Replace intake air temperature s

Page 2533 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0101 MAF SENSOR
EC-1177
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
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M A EC
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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

Page 2534 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1178< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
Component Description INFOID:0000000004501157
The mass air flow sensor (1) is placed in the

EC-1178< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
Component Description INFOID:0000000004501157
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 Mode INFOID:0000000004501158
Specification data are reference values.
On Board Diagn osis Logic INFOID:0000000004500009
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure INFOID:0000000004500010
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, 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-1130 .
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 no t rise more than 2,400 rpm due to the fuel cut.

Page 2535 of 4331

NISSAN LATIO 2009 Service Repair Manual EC
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PROCEDURE FOR DTC P0102
1. Start engine and wait at least 5 seconds.
2. Check DTC.
3. If DTC is detected, go to EC-1181, " Diagnosis Procedure " .
PROCEDURE FOR DTC P0103 1. Turn ignition swi

Page 2536 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1180< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0102, P0103 MAF SENSOR
Wiring Diagram INFOID:0000000004501159
Specification data are reference values and are measured between each terminal and ground.

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