Honda Civic Service Manual page 394

PGM-FI System
Intake Air Temperature (lAT) Sensor ('96 - 97 Models)
The scan tool indicates Diagnostic Trouble code (DTC) P0111: A range/performance problem
in the lntake Aar
Temperature (lAT) Sensor circuit.
The IAT sensor is a temperature dependant resistor (thermistor). The resistance of
the thermistor decreases as the intake
air temperature increases as shown below.
RES|STAI{CE
{tol
. 32 .. ro. tr. 2r, zaa r..l
-20 o 20 /|o ao ao 100 rrotlcl
INTAIG AIR TEMPEMTURE
-
The MIL hss beon reported on.
-
DTC P0111 is stored.
-
Or from Probable C.use List.
Problem verification:
1. Turn the ignition switch OFF.
2. Disconnect the IAT sensor 2P
connector,
3. Remove the IAT sensor.
4. Reconnect the IAT sensor 2p
5. Leave the IAT sensor exposed
to ambaent temperature,
6. Turn the ignition switch oN fll).
7. Check the IAT with the scan
tool.
Rsplscg the IAT sensor.
Check tho IAT sensor output:
1. Warm the IAT sensor with a
hair dryer-
2. Check the IAT with the scan
tool.
Did the IAT rise 2"F (1.C) or more
from the ambient temperature?
Int€rmittont failu.e, system is OK
at this time.
Replsce the IAT sensor.
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