Suzuki DF150 Service Manual page 70

CYLINDER TEMPERATURE SENSOR
The cylinder temperature sensor is installed on the cylinder (top
side) and 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 injec-
tion time duration, ignition timing, etc.
This sensor is also used to detect engine over-heat as the ECM
detects both the temperature and temperature change gradient
(temperature rise VS time).
EXHAUST MANIFOLD TEMPERATURE SENSOR
The exhaust manifold temperature sensor is installed on the
exhaust manifold and used to detect exhaust manifold tempera-
ture.
This sensor is the same type as the cylinder temperature sen-
sor, and inputs a signal to the ECM as a voltage value.
This signal is also used to detect engine over-heat.
IAT (Intake Air Temperature) SENSOR
The IAT sensor is installed on the air intake silencer case and
used to detect the intake air temperature.
This sensor is the same type as the cylinder temperature sen-
sor, and inputs a signal to the ECM as a voltage value.
This signal is used to compensate the fuel injection time dura-
tion.
MAP (Manifold Absolute Pressure) SENSOR
The MAP sensor is installed on the intake manifold and used to
detect the intake manifold pressure.
It also detects the barometric pressure before starting the
engine. This sensor inputs the intake manifold pressure to the
ECM as a voltage value.
This input signal is used as the fundamental signal to determine
fuel injection time duration, ignition timing, etc.
ENGINE CONTROL SYSTEM
Cylinder temp. sensor
(kΩ)
Temperature
EX. manifold temp. sensor
1
1. IAT sensor
2. Air intake silencer case
3-11
(C˚)
2
MAP sensor