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EC-970
[YD (WITH EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR PFP:22680
Component Description EBS01189
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 EBS0118A
Specification data are reference values.
ECM Terminals and Reference Value EBS0118B
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.
On Board Diagnosis Logic EBS0118C
DTC Confirmation Procedure EBS0118D
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.
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 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 —
Sensor ground
(Sensors shield circuit)
[Ignition switch ON] Approximately 0.3V
73 B
Mass air flow sensor
ground
[Ignition switch ON] Approximately 0.3V
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.
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