1C-3 Engine Electrical Devices:
Cylinder Temperature Sensor
The cylinder temperature sensor is installed on the
cylinder (top side) and is used to detect the cylinder
temperature.
This is a thermistor type sensor (resistance of which
changes depending on temperature) and inputs a signal
to the ECM as a voltage value. This signal is used to
compensate the fuel injection duration, ignition timing,
etc.
This sensor is also used to detect engine over-heat as
the ECM detects both the temperature and temperature
change rate (gradient temp.-temperature rise vs. time).
IAT Sensor
Three sensors (MAP sensor / TPS / IAT sensor) are
combined into one unit that is installed on top of the
throttle body.
IAT sensor is used to detect the intake air temperature.
It is a thermistor type sensor, and inputs a signal to the
ECM as a voltage value.
This signal is used to compensate the fuel injection
duration.
MAP Sensor
Three sensors (MAP sensor / TPS / IAT sensor) are
combined into one unit that is installed on top of the
throttle body.
This sensor inputs the intake air pressure to the ECM as
a voltage value.
It inputs a signal to the ECM and is used as the
fundamental signal to determine fuel injection duration,
ignition timing, etc.
1. Cylinder temp. sensor
1
(k )
(C°)Temperature
Resistance
1. IAT sensor
1. MAP sensor
1
1
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