Long-Duration Cdi (L-Cdi); Throttle-Position Sensor (Tps); Crank-Position Sensor (Cps); Water-Temperature Sensor (Wts) - TOHATSU TLDI 40 Service Manual

Long-duration CDI (L-CDI)

The L-CDI or Long-arc duration CDI ignition system is used as the TLDI ignition system to maximize
combustion efficiency, fuel economy and minimize exhaust emissions. The L-CDI system offers a longer
plug sparking interval, via spark plug, than used with conventional two-stroke engines. This is designed to
ensure more complete combustion of the mixture in the chamber. L-CDI minimizes mis-firing and reduces
fluctuation in engine speed during idling to offer a much smoother engine feel when compared with
conventional two-stroke engines.

Throttle-Position Sensor (TPS)

The throttle-position sensor system is comprised of TPS1 and TPS2. These are used in combination to
detect throttle butterfly valve, position advancer arm position, and to relay the information to the ECU.

Crank-Position Sensor (CPS)

The crank-position sensor is designed to sense the encoder located above the ring gear on the flywheel in
order to detect crankshaft position and transmit the information to the ECU.

Water-Temperature Sensor (WTS)

Positioned on the water jacket installed on the cylinder, the water-temperature sensor (WTS) is used detect
temperature of the cooling water in the cylinder and relay the information to the ECU.
Oil Level Sensor
The oil level sensor is used to detect the level of remaining oil and relay the information to the ECU.
The oil level sensor operates by lighting the indicator on the tachometer and sounding the beeper when
engine oil is low.
Air Injectors
The air injectors are used to inject a fine mist of fuel and air into the combustion chamber for each piston.
The ECU determines the mixture and timing for injecting fuel according to current engine operating
conditions based on information relayed from the various sensors.
Fuel Injector
The fuel injectors supply the fuel in the air rail to the air injectors via the set pieces. The ECU determines the
mixture for injecting fuel according to current engine operation based on information relayed from the
various sensors.
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