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DTC P0102, P0103 MAF SENSOR
EC-1543
[YD (WITHOUT EURO-OBD)]
C
D
E
F
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M
A
EC
DTC P0102, P0103 MAF SENSOR PFP:22680
Component Description BBS0028M
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 BBS0028N
Specification data are reference values.
This signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis Logic BBS0028O
The MI will not light up for these self-diagnoses.
DTC Confirmation Procedure BBS0028P
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-1522, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Turn ignition switch ON and wait at least 5 seconds.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
PBIB1604E
MONITOR ITEM CONDITION SPECIFICATION
MAS AIR/FL SE*
● Engine: After warming up
● Air conditioner switch: OFF
● Shift lever: Neutral position
● No load
Ignition switch: ON
(Engine stopped)
Approximately 0.4V
Idle 1.3 - 1.6V
Engine is revving from idle to
about 4,000 rpm.
1.3 - 1.6V to Approximately 4.0V
(Check for liner voltage rise in
response to engine being
increased to about 4,000 rpm)
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
(The sensor circuit is open or
shorted.)
● Mass air flow sensor
P0103
0103
Mass air flow sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
SEF817Y
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