Nissan Almera Tino V10. Manual — part 551
EC-1030
[YD (WITH EURO-OBD)]
DTC P0101 MAF SENSOR
DTC P0101 MAF SENSOR
PFP:22680
Component Description
EBS0139I
The mass air flow sensor is placed in the stream of intake air. It mea-
sures 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-II Reference Value in Data Monitor Mode
EBS0139J
Specification data are reference values.
*: This signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
ECM Terminals and Reference Value
EBS0139K
Specification data are reference values, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
PBIB1604E
MONITOR ITEM
CONDITION
SPECIFICATION
MAS AIR/FL SE*
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: Neutral position
●
No-load
Idle
1.5 - 2.0V
2,000 rpm
2.2 - 2.7V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage)
54
W/L
Mass air flow sensor
[Engine is running]
●
Warm-up condition
●
Idle speed
1.8 - 2.3V
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
2.5 - 3.0V
67
B
Sensor ground
(Sensors shield circuit)
[Ignition switch ON]
Approximately 0.3V
73
O/L
Mass air flow sensor ground
[Ignition switch ON]
Approximately 0.3V
105
113
G
G
ECM relay (self-shutoff)
[Ignition switch ON]
[Ignition switch OFF]
●
For a few seconds after turning ignition
switch OFF
Approximately 1.2V
[Ignition switch OFF]
●
More than a few seconds after turning
ignition switch OFF
BATTERY VOLTAGE
(11 - 14V)
119
120
R
R
Power supply for ECM
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
DTC P0101 MAF SENSOR
EC-1031
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
On Board Diagnosis Logic
EBS0139L
DTC Confirmation Procedure
EBS0139M
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and let it idle for at least 40 seconds.
4.
Drive vehicle under the following condition.
5.
Release accelerator pedal for at least 10 seconds.
Do not depress brake pedal during this procedure.
6.
If 1st trip DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0101
Mass air flow sensor circuit
range/performance problem
Improper voltage from the sensor is sent to
ECM compared with the driving condition.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
Mass air flow sensor
●
Intake air leaks
●
Air cleaner
●
EGR volume control valve
●
Intake air temperature sensor
●
Turbocharger boost sensor
(YD22DDTi engine models)
CKPS·RPM
Approx. 2800 rpm
VHCL SPEED SE
70 - 100 km/h
Shift lever
4th position
MBIB1085E
EC-1032
[YD (WITH EURO-OBD)]
DTC P0101 MAF SENSOR
Wiring Diagram
EBS0139N
MBWA0651E
DTC P0101 MAF SENSOR
EC-1033
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
EBS0139O
1.
CHECK INTAKE SYSTEM
1.
Check air cleaner for clogging.
2.
Check the following for connection and cracks.
–
Air duct
–
Vacuum hoses
–
Intake air passage between air duct and intake manifold
OK or NG
OK
>> GO TO 2.
NG
>> Reconnect or repair the parts.
2.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten body ground screw. Refer to
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace ground connection.
3.
CHECK MAFS POWER SUPPLY CIRCUIT
1.
Disconnect mass air flow sensor harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between mass air flow sensor terminal 5 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
MBIB0915E
MBIB0914E
Voltage: Battery voltage
MBIB0988E
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