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SEC266C
SEF012P
Component Description
NFEC0852
The intake air temperature sensor is mounted to the air duct hous-
ing. The sensor detects intake air temperature and transmits a sig-
nal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive
to the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.
<Reference data>
Intake air
temperature °C (°F)
Voltage* V Resistance kΩ
25 (77) 3.32 1.9 - 2.1
*: These data are reference values and are measured between ECM terminal 66
(Intake air temperature sensor) and body ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.
On Board Diagnosis Logic
NFEC0853
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P0112
0112
Intake air temperature
sensor circuit low
input
An excessively low voltage from the sensor is sent
to ECM.
I Harness or connectors
(The sensor circuit is open or
shorted.)
I Intake air temperature sensor
P0113
0113
Intake air temperature
sensor circuit high
input
An excessively high voltage from the sensor is
sent to ECM.
DTC Confirmation Procedure
NFEC0854
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.
SEF058Y
WITH CONSULT-II
NFEC0854S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 5 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-205.
WITH GST
NFEC0854S02
Follow the procedure “With CONSULT-II” above.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0112, P0113 IAT SENSOR
Component Description
EC-203
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