Kubota M108S, Workshop Manual

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1-S46
M108S, WSM ENGINE
Measuring the Gap of Angles between Crankshaft Mechanical
Top Dead Center and Crankshaft Position Sensor’s Electrical
Top Dead Center (Continued)
9. Connect the engine harness (10) and main switch (13).
10.Connect the battery.
11.Set a circuit tester (12) on the output terminal (white lead) and
ground terminal (black lead) of crankshaft position sensor (11).
12.Turn the main switch (13) to “ON”.
13.Make sure that the voltage of crankshaft position sensor changes
from 0 to 5 V or from 5 to 0 V with turning flywheel.
14.Set the flywheel at top dead center with aligning mechanical top
dead center which measured.
15.Make sure that the 14th teeth of crankshaft position sensor’s
pulsar gear (14) from the teeth lack meets the crankshaft position
sensor (11).
16.Turn the flywheel slowly counterclockwise until 5 V comes up.
(When the 14th teeth of crankshaft position sensor’s pulsar gear
is passing away from crankshaft position sensor, 5 V is coming
up.)
17.Draw a straight line on the flywheel.
18.Measure the distance between crankshaft mechanical top dead
center (16) and crankshaft position sensor’s electrical top dead
center (17).
19.Calculate the actual gap of angles.
Distance 1 mm : 0.28 °
X angle = 0.28 ° x actual distance of gap
20.Rewrite the gap of angles to ECU.
Refer to “Diagnosis Manual” for rewriting the gap of angles to
ECU.
IMPORTANT
■
• When the crankshaft position sensor detects the teeth of
pulsar gear, the circuit tester indicates 0 V.
• This point coming up 5 V is crankshaft position sensor’s
electrical top dead center (17).
• Standard line is crankshaft mechanical top dead center (9).
So, when the crankshaft position sensor’s electrical top
dead center is more advanced than crankshaft mechanical
top dead center, it means minus. When the crankshaft
position sensor’s electrical top dead center is more retarded
than crankshaft mechanical top dead center, it means plus.
W1077207
(10) Engine Harness
(11) Crankshaft Position Sensor
(12) Circuit Tester
(13) Main Switch
(14) Crankshaft Position Sensor’s Pulsar
Gear
(15) Screw Driver
(16) Crankshaft Mechanical Top Dead
Center
(17) Crankshaft Position Sensor’s
Electrical Top Dead Center
KiSC issued 06, 2007 A