Honda BF40D Mode D'emploi page 460

• ECT SENSOR TROUBLESHOOTING
MIL blinks 24 times
1) Symptom reproduction test
a. Turn the combination switch OFF. Disconnect ECT
sensor 2P connector
again.
b. Reset the ECM (P. 5-43).
c. Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 24 times?
YES - Go to "2) ECT sensor signal line open-circuit
inspection."
NO - Temporary failure (Disappears.)
5-65
once and connect it
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460
2) ECT sensor signal line open-circuit inspection
a. Turn the combination switch OFF and disconnect
the ECT sensor 2P connector
b. Turn the combination switch ON. Measure the
voltage between the ECT sensor 2P connector
main wire harness side No.1 (Red/Black) terminal
and the engine ground.
ECT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
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VIEWED FROM THE TERMINAL SIDE
Is the measurement within 4.30 - 5.25V?
YES - Go to "3) ECT sensor signal line short-circuit
inspection."
NO - Repair open in the main wire harness
between the ECM and the ECT sensor.
.
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TOH (Red/Black)