Engine Coolant Temperature Sensor; Removal; Inspection - Suzuki GSX-R750 Service Manual

5-8 COOLING AND LUBRICATION SYSTEM
ENGINE COOLANT TEMPERATURE
SENSOR

REMOVAL

• Remove the under cowling. (6-5)
• Drain engine coolant. (2-18)
• Remove the front and rear seats. (6-8)
• Lift and support the fuel tank. (4-51)
• Remove the air cleaner box. (4-60 and -61)
• Remove the throttle body. (4-61 and -62)
• Disconnect the engine coolant temperature sensor lead wire.
• Remove the engine coolant temperature sensor 1.

INSPECTION

• Check the engine coolant temperature sensor by testing it at
the bench as shown in the figure. Connect the temperature
sensor 1 to a circuit tester and place it in the oil contained in a
pan, which is placed on a stove.
• Heat the oil to raise its temperature slowly and read the column
thermometer 2 and the ohmmeter.
• If the temperature sensor ohmic value does not change in the
proportion indicated, replace it with a new one.
Temperature sensor specification
Temperature
20°C ( 68°F)
50°C ( 122°F)
80°C ( 176°F)
110°C ( 230°F)
130°C ( 266°F)
If the resistance noted to show infinity or too much different resis-
tance value, replace the temperature sensor with a new one.
#
* Take special care when handling the temperature-sen-
sor. It may cause damage if it gets a sharp impact.
* Do not contact the engine coolant temperature sensor
1 and the column thermometer 2 with a pan.
Standard resistance
Approx. 2.45 kΩ
Approx. 0.811 kΩ
Approx. 0.318 kΩ
Approx. 0.142 kΩ
Approx. 0.088 kΩ
Oil