ENGINE (J05E)/TROUBLESHOOTING
2–199
DTC: P0101
EN01H02127030602016039
P0101: Air flow sensor - rationality
INFORMATION
1.
Technical description
•
The air flow sensor mounted on the air cleaner constantly measures the intake air quantity.
<Description of malfunction>
•
Air flow sensor value cannot be correctly recognized.
2.
DTC set condition
(1)
DTC detection condition
•
Engine speed is between 720 r/min and 980 r/min.
•
Engine speed variation is 234.4 r/min/sec or less.
•
Fuel injection rate is between 0 mm
3
/st. cyl. sec and 80 mm
3
/st. cyl.
•
Fuel injection rate variation is 78.1 mm
3
/st. cyl sec. or less.
•
Engine coolant temperature is 55
C {131
F} or less.
•
EGR valve opening is 0% or less (EGR-cut status)
•
Exhaust brake is not actuated.
(2)
Judgement criteria
•
Theoretical air quantity calculated from boost pressure and atmospheric pressure and actual air quantity are
compared for at least 10 seconds, and the ratio of theoretical air quantity to actual air quantity is at least 1.15
or no greater than 0.75. And:
•
Difference between DCY value prior to above result and current DCY value is 0.10 or less; and
•
The condition "(Average boost pressure minus average atmospheric pressure) was
≥
18 kPa" when the starter
key turned off and engine was stopped after previous DCY is not continued for more than 3 seconds.
3.
Reset condition
•
After restoration to normal condition and starter key "LOCK"
4.
Indication, warning or system control regulation when the DTC is set.
•
MIL: ON
•
SVS light: OFF
•
Engine output is restricted.
Intake air
temperature sensor
(air flow sensor built in)
(E)
(THW)
XCV
X71
XCT
Z65
(FC)
(E2G)
(+B)
(E2)
X72
(THA)
X4K (VG)
Z5G
X66
ZJQ
(E5)
X28 (THW)
(EVG)
XMH
(VAF)
X2U
(THA)
X82
10mA
10mA
10mA
10mA
200mA
200mA
Coolant temperature sensor
Body earth
10mA
Engine ECU
SHTS021270300184
