Troubleshooting Flowchart - Intake Air Temperature (Lat) Sensor - Honda Prelude 1993 Service Manual

PGM-FI System
Troubleshooting Flowchart - Intake Air Temperature (lAT) Sensor
f6l F l-
The Maltunction Indicator Lamp (MtL) indicates Diagnostic Trouble Code (DTC) 1O: A problem in the
---:-
Intake Air TemDerature (lATl Sensor circuit.
The IAT Sensof is a temperature dependant resistor (thermistor). The resistance ofthe thermistor decreases as the intake
air temoerature increases as shown below.
RESISTANCE (KO}
THERMISTOR
. 12 aa ro4 1ao lta :12 t a |.Fr
INTAKE AIR TEMPERATURE
GR N'VHT
:[611:frnl
/ --i- \ / --T- \
i :
IA7 SENSOR
- Tho MIL har b6on ropon6d on.
- Wlth s6rvico chock connoctol
iumpod {3€o pago 1 1 42}. cod6
10 is indicsrod.
Do the ECM Reset Procedur€ (see
p a g e 1 1 - 4 3 ) .
Turn the ignition switch ON.
Intermitl.nt tailu.o, sydom iB OK
at thir tims (tost ddvo may bo
noc6ssttyl.
Chock for poor connoction! ol
loo!. wircr .t O+25, 9126llocll-
ed ot right .hock towor), CiOS
llAT sonsorl and ECM.
ls the MIL on and do€s it
indicate cod6 10?
Turn the ignition switch OFF.
Disconnect the 2P connector trom
the iAT sensor.
Measure resistanc6 between the
2 terminals on the IAT sensor,
ls there 0.4 -4.0 k0?
lro page 11-771
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