Sensors - TOHATSU MFS 25D Service Manual

1) Sensors

Individual sensors detect the engine operating conditions and
sends signals regarding the information to the ECU.
1. Pulser Coil [Crank Position Sensor]
Pulser coils function as crank position sensors. As the
crank position in 120° and sends a crank position signal to
the ECU.
The ECU uses this signal to confirm the fuel injection
amount and ignition timing.
2. T-MAP (Manifold Pressure and Temperature) Sensor
The T-MAP sensor is located on the upper area of
the intake manifold to detect the intake manifold inner
pressure (intake vacuum pressure) and intake air
temperature and send the signal to the ECU.
The ECU uses this signal to confirm the fuel injection
amount and ignition timing.
3. Engine Temperature Sensor
The engine temperature sensor located in the upper part
of the engine cylinder measures the block temperature
of the cooling water passage passing through the engine
which is controlled by a thermostat, and sends a signal to
the ECU.
The ECU uses this information to correct the fuel injection.
4. Throttle Position Sensor (TPS)
The throttle position sensor is located on top of the throttle
body, and is connected to the throttle shaft. The throttle
position sensor sends throttle opening angle information to
the ECU.
T h e E C U u s e s t h i s i n f o r m a t i o n f o r f u e l i n j e c t i o n
compensation, ignition timing compensation, idling control
and ISC control.
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