FLA -526
FUEL SYSTEM
DTC P1111 INTAKE AIR TEMPERATURE SENSOR CIRCUIT SHORT -
INTERMITTENT HIGH INPUT
COMPONENT LOCATION
EF01B093
MAFS & IATS
SCMF16185L
GENERAL DESCRIPTION
E0E1407B
The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor
whose resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature
increases, and increases as the temperature decreases. The 5 V power source in the ECM is supplied to the IATS via
a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the IATS are connected in series. When
the resistance value of the thermistor in IATS changes according to the intake air temperature, the signal voltage also
changes. Using this signal, the information of the intake air temperature, the ECM corrects basic fuel injection duration
and ignition timing.
DTC DESCRIPTION
E0F8336B
Checking output signals of IATS every 120 sec. under detecting condition, if an ouput signal is over 4.9V for more than 4
sec., PCM sets P1111.