Sym JOYRIDE 125 Service Manual

5. Fuel Injection System
5-18
Engine Temperature Sensor / T-Map Sensor
Engine temperature sensor:
According to the semiconductor’s characteristic, the sensor detects the temperature of engine oil
and metal parts and then sends a voltage signal to the ECU. On this base, the ECU can correct
fuel injection and ignition timing.
T-MAP Sensor：
Sensor combined both pressure and NTC can detect the absolute pressure and temperature in
the intake manifold, and then provides the ECU with signal for adjustment fuel injection quantity
based on environmental temperature and air pressure difference from elevation level change.
NTC- Negative Temperature
Coefficient Resisto
r
ECU
mv
-40ºC
140ºC
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Sym JOYRIDE 125 Specifications

General

Displacement	124.6 cc
Fuel System	Electronic Fuel Injection
Transmission	CVT
Front Suspension	Telescopic fork
Rear Suspension	Unit Swing
Front Brake	Disc
Rear Brake	Drum
Length	1900 mm
Engine Type	4-stroke
Cooling System	Air-cooled