Suzuki GSX-R750 Service Manual page 165

4-18 FI SYSTEM AND INTAKE AIR SYSTEM
ENGINE COOLANT TEMPERATURE SENSOR (ECT SENSOR)
The engine coolant temperature sensor is installed at the rear
side of the cylinder head.
The sensor detects the engine coolant temperature in thermistor
resistance value, which is then converted to voltage signal and
sent to the ECM. The injection volume increases as coolant tem-
perature decreases.
The thermistor resistance value increases when the engine cool-
ant temperature is low, and decreases when the engine coolant
temperature is high.
Thermistor
ATMOSPHERIC PRESSURE SENSOR (AP SENSOR)
The atmospheric pressure sensor is located beneath the left
side of the seat rail.
The sensor detects the atmospheric pressure. The detected pres-
sure is converted into voltage signal and sent to the ECM.
The injection time (volume) is controlled according to the voltage
signal (output voltage).
The voltage signal increases as the atmospheric pressure rises.
Resistance value
Low
Output voltage
(V)
Low
(High vacuum)
High Temperature
Atmospheric
pressure(mmHg)
High
(Low vacuum)