Honda Motor BF40D Manual Del Usuario página 461

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3) ECT sensor signal line short-circuit inspection
• Turn the combination switch OFF. Disconnect the
ECM connector A
. Check for continuity between
9
the ECT sensor 2P connector
side No.1 (Red/Black) terminal and the engine
ground.
ECT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
11
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Repair short in the main wire harness
between the ECM and the ECT sensor.
NO - Go to "4) ECT sensor GND line open-circuit
inspection."
4) ECT sensor GND line open-circuit inspection
• Connect the ECM connector A
continuity between the ECT sensor 2P connector
main wire harness side No.2 (Green/Red)
11
terminal and the engine ground.
ECT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
SG2
(Green/Red)
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Go to "5) ECT sensor inspection."
NO - Repair open in the main wire harness
between the ECM and the ECT sensor.
5) ECT sensor inspection
main wire harness
11
ECT SENSOR 2P CONNECTOR
ECT SENSOR SIDE
TOH (Red/Black)
. Check for
9
11
461
• Disconnect the ECT sensor. Measure the resistance
between the ECT sensor side No.1 terminal and No.2
terminal of the ECT sensor 2P connector
11
TOH
SG2
AMBIENT TEMPERATURE
VIEWED FROM THE
TERMINAL SIDE
Does the measurement correspond to the ambient
temperature?
YES - Replace the ECM with a new one and
recheck.
NO - Replace the ECT sensor with a new one and
recheck.
.
11
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Bf50d

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