Nissan Almera Tino V10. Manual — part 626
EC-1330
[YD (WITHOUT EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
PFP:22680
Component Description
EBS014TW
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
EBS014TX
Specification data are reference values.
*: This signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
ECM Terminals and Reference Value
EBS014TY
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 P0102, P0103 MAF SENSOR
EC-1331
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
On Board Diagnosis Logic
EBS014TZ
The MI will not light up for these self-diagnoses.
DTC Confirmation Procedure
EBS014U0
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.
Wait at least 5 seconds.
4.
If DTC is detected, go to
EC-1333, "Diagnostic Procedure"
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0102
Mass air flow sensor circuit
low input
An excessively low voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
Mass air flow sensor
P0103
Mass air flow sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
SEF817Y
EC-1332
[YD (WITHOUT EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
Wiring Diagram
EBS014U1
MBWA0654E
DTC P0102, P0103 MAF SENSOR
EC-1333
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
EBS014U2
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten body ground screw. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connection.
2.
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 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors F45, M71
●
Harness for open or short between mass air flow sensor and ECM relay
●
Harness for open or short between mass air flow sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
MBIB0915E
MBIB0914E
Voltage: Battery voltage
MBIB0988E
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