Suzuki Boulevard M50, Service Manual

Page: 203 / 454

5-46 FI SYSTEM
ECT SENSOR INSPECTION
• Remove the ECT sensor. (

5-77)
• Check the ECT sensor by testing it at the bench as shown in
the figure. Connect the ECT sensor
1
to a circuit tester and
place it in the oil
2
contained in a pan, which is placed on a
stove.
• Heat the oil to raise its temperature slowly and read the col-
umn thermometer
3
and the ohmmeter.
• If the ECT sensor ohmic value does not change in the propor-
tion indicated, replace it with a new one.

ECT sensor specification

09900-25008: Multi-circuit tester set

Tester knob indication: Resistance (
Ω
)
If the resistance is noted to show infinity or too much different
resistance value, replace the ECT sensor with a new one.

Engine Coolant Temp Resistance
20 °C (68 °F) Approx. 2.45 k
Ω
40 °C (104 °F) Approx. 1.148 k
Ω
60 °C (140 °F) Approx. 0.587 k
Ω
80 °C (176 °F) Approx. 0.322 k
Ω
* Take special care when handling the ECT sensor. It
may cause damage if it gets a sharp impact.
* Do not contact the ECT sensor and the column ther-
mometer with a pan.
SA
MP
LE