Honda BF40D Mode D'emploi page 456

• IAT SENSOR TROUBLESHOOTING
MIL blinks 10 times
1) Symptom reproduction test
a. Turn the combination switch OFF. Disconnect IAT
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 10 times?
YES - Go to "2) IAT sensor signal line open-circuit
inspection."
NO - Temporary failure (Disappears.)
5-61
once and connect it
1
456
2) IAT sensor signal line open-circuit inspection
a. Turn the combination switch OFF and disconnect
IAT sensor 2P connector
b. Turn the combination switch ON. Measure the
voltage between the IAT sensor 2P connector
main wire harness side No.1 (Red/Yellow) terminal
and the engine ground.
IAT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
1
VIEWED FROM THE TERMINAL SIDE
Is the measurement within 4.30 - 5.25V?
YES - Go to "3) IAT sensor signal line short-circuit
inspection."
NO - Repair open in the main wire harness
between the ECM and the IAT sensor.
.
1
1
TA (Red/Yellow)