Honda Motor BF40D Manual Del Usuario página 464

• HO2S HEATER TROUBLESHOOTING
MIL blinks 41 times
1) Symptom reproduction test
a. Turn the combination switch OFF. Disconnect
HO2S 4P connector
18
b. Reset the ECM and disconnect the SCS short
connector (P. 5-43).
c. Start the engine and let it run at 3,000 min
for 5 minutes or more under no load.
d. Turn the combination switch OFF and connect the
SCS short connector.
e. Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 41 times?
YES - Go to "2) HO2S heater inspection."
NO - Temporary failure (Disappears.)
5-69
once and connect it again.
(rpm)
-1
464
2) HO2S heater inspection
a. Turn the combination switch OFF and disconnect
the HO2S 4P connector
b. Measure the resistance between the HO2S side
No.3 (White) terminal and No.4 (White) terminal of
the HO2S 4P connector
HO2S 4P CONNECTOR HO2S SIDE
18
O2HT (White)
VIEWED FROM THE TERMINAL SIDE
Is the measurement within 10 - 40 ?
YES - Go to "3) HO2S heater power line open-
circuit inspection."
NO - Replace the HO2S with a new one and
recheck.
.
18
.
18
IGP3 (White)