Sensors - TOHATSU MFS25 Service Manual

1) Sensors

Individual sensors detect engine operating conditions and
sends signals regarding the information to ECU.
1. Pulser Coil [Crank Position Sensor]
Pulser coils function as crank position sensors. As flywheel
rotates, two pulser coils detects crank position in 120 degree
range of flywheel and sends the position signals to ECU.
ECU uses this signal to establish fuel injection amount and
ignition timing.
2. MAP ( Manifold Pressure ) Sensor
MAP sensor is located on the upper area of intake manifold
to detect intake manifold inner pressure (intake vacuum
pressure) and send the signal to ECU.
ECU uses this signal to establish fuel injection amount and
ignition timing.
3. Water Temperature Sensor
Water temperature sensor is located on the upper area of
cylinder block and project into cooling water passage. The
sensor detects temperature of cooling water of which flow
through engine is controlled with thermostat and sends the
signal to ECU.
4. MAT (Manifold Temperature) Sensor
MAT sensor is located on the front side of throttle valve to
detect intake air temperature and send the signal to ECU.
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