Ebt Sensor/Ect Sensor 2/3; Inspection; Water Level Sensor Inspection - TOHATSU BFT75A Service Manual

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FUEL SYSTEM

EBT SENSOR/ECT SENSOR 2/3

INSPECTION

Remove the following:
– EBT sensor (page 5-84)
– ECT sensor 2 (page 5-85)
– ECT sensor 3 (page 5-85)
Heat the coolant with an electric heating element.
Suspend the sensor [1] in heated coolant and check the
continuity through the sensor as the coolant heats up.
• Soak the sensor in coolant up to its threads with at
least 40 mm (1.57 in) from the bottom of the pan to
the bottom of the switch.
• Keep temperature constant for 3 minutes before
testing. A sudden change of temperature will result
in incorrect readings. Do not let the thermometer [2]
or sensor touch the pan.
Temperature
Resistance
Replace the sensor if it is out of specifications.
Install the following:
– EBT sensor (page 5-84)
– ECT sensor 2 (page 5-85)
– ECT sensor 3 (page 5-85)

WATER LEVEL SENSOR INSPECTION

Disassemble the water separator (page 5-89).
Check that the float [1] inside the water separator cup
[2] moves smoothly.
If it does not, replace the water separator cup.
With the water separator cup removed, place the water
separator cup right side up (condition when it is
installed) and check there is no continuity between the
2P connector terminals [3].
With the water separator cup removed, place the water
separator cup up side down (condition when the cup is
inverted) and check there is continuity between the 2P
connector terminals.
If there is any abnormality, replace the water separator
cup.
5-106
40 °C (104 °F) 100 °C (212 °F)
1.0 – 1.3 kΩ 0.1 – 0.2 kΩ
[1]
[2]
[1]
[2]
Normal
(Water separator
(Water separator
cup up side down)
cup being installed)
[2]
[3]
Inverted